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Alkali Containing Layered Metal Oxides as Catalysts for the Oxygen Evolution Reaction (2024)
Journal Article
Falsaperna, M., Arrigo, R., Marken, F., & Freakley, S. J. (in press). Alkali Containing Layered Metal Oxides as Catalysts for the Oxygen Evolution Reaction. ChemElectroChem, e202300761. https://doi.org/10.1002/celc.202300761

Improving the efficiency of the oxygen evolution reaction (OER) is essential to realise energy systems based on water electrolysis. Many catalysts have been developed for the OER to date, with iridium‐based oxides being the most promising due to thei... Read More about Alkali Containing Layered Metal Oxides as Catalysts for the Oxygen Evolution Reaction.

Advanced (photo)electrocatalytic approaches to substitute the use of fossil fuels in chemical production (2023)
Journal Article
Centi, G., Perathoner, S., Genovese, C., & Arrigo, R. (in press). Advanced (photo)electrocatalytic approaches to substitute the use of fossil fuels in chemical production. Chemical Communications, 59(21), 3005-3023. https://doi.org/10.1039/d2cc05132j

Electrification of the chemical industry for carbon-neutral production requires innovative (photo)electrocatalysis. This study highlights the contribution and discusses recent research projects in this area, which are relevant case examples to explor... Read More about Advanced (photo)electrocatalytic approaches to substitute the use of fossil fuels in chemical production.

Assessment of the Degradation Mechanisms of Cu Electrodes during the CO (2023)
Journal Article
Mom, R. V., Sandoval-Diaz, L., Gao, D., Chuang, C., Carbonio, E. A., Jones, T. E., …Velasco-Vélez, J. (in press). Assessment of the Degradation Mechanisms of Cu Electrodes during the CO. ACS applied materials & interfaces, 15(25), https://doi.org/10.1021/acsami.2c23007

Catalyst degradation and product selectivity changes are two of the key challenges in the electrochemical reduction of CO on copper electrodes. Yet, these aspects are often overlooked. Here, we combine X-ray spectroscopy, electron microscopy, an... Read More about Assessment of the Degradation Mechanisms of Cu Electrodes during the CO.

Interfacial chemistry in the electrocatalytic hydrogenation of CO2 over C-Supported Cu-Based systems (2023)
Journal Article
Gianolio, D., Higham, M., Quesne, M., Aramini, M., Xu, R., Large, A., …Arrigo, R. (2023). Interfacial chemistry in the electrocatalytic hydrogenation of CO2 over C-Supported Cu-Based systems. ACS catalysis, 13,

Operando soft and hard X-ray spectroscopic techniques were used in combination with plane-wave density functional theory (DFT) simulations to rationalize the enhanced activities of Zn-containing Cu nanostructured electrocatalysts in the electrocataly... Read More about Interfacial chemistry in the electrocatalytic hydrogenation of CO2 over C-Supported Cu-Based systems.

Orange peel biomass‐derived carbon supported Cu electrocatalysts active in the CO2 ‐ reduction to formic acid (2023)
Journal Article
Miah, T., Demoro, P., Nduka, I., De Luca, F., Abate, S., & Arrigo, R. (2023). Orange peel biomass‐derived carbon supported Cu electrocatalysts active in the CO2 ‐ reduction to formic acid. ChemPhysChem, https://doi.org/10.1002/cphc.202200589

We report a green, wet chemistry approach towards the production of C‐supported Cu electrocatalysts active in the CO2 reduction to formic acid. We use citrus peels as a C support precursor and as a source of reducing agents for the Cu cations. We sho... Read More about Orange peel biomass‐derived carbon supported Cu electrocatalysts active in the CO2 ‐ reduction to formic acid.

Enhanced stability of sub-nanometric iridium decorated graphitic carbon nitride for H 2 production upon hydrous hydrazine decomposition (2022)
Journal Article
Bellomi, S., Barlocco, I., Chen, X., Delgado, J., Arrigo, R., Dimitratos, N., …Villa, A. (2022). Enhanced stability of sub-nanometric iridium decorated graphitic carbon nitride for H 2 production upon hydrous hydrazine decomposition. Physical Chemistry Chemical Physics, 2, 1081-1095. https://doi.org/10.1039/d2cp04387d

Stabilizing metal nanoparticles is vital for large scale implementations of supported metal catalysts, particularly for a sustainable transition to clean energy, e.g., H2 production. In this work, iridium sub-nanometric particles were deposited on co... Read More about Enhanced stability of sub-nanometric iridium decorated graphitic carbon nitride for H 2 production upon hydrous hydrazine decomposition.

In situ dynamics of carbon supported metal systems for carbon dioxide electroreduction (2022)
Presentation / Conference
Arrigo, R. (2022, November). In situ dynamics of carbon supported metal systems for carbon dioxide electroreduction. Presented at Proceedings of International Conference on Frontiers in Electrocatalytic Transformations (INTERECT22), València, Spain

Graphitic materials are largely explored as redox-active supports for metal species in acid/base catalysis, redox catalysis and electrocatalysis. [1] Edge terminations and in-plane point defects, such non 6-membered rings and vacancies on the basal p... Read More about In situ dynamics of carbon supported metal systems for carbon dioxide electroreduction.

The rise of electrochemical NAPXPS operated in the soft X-ray regime exemplified by the oxygen evolution reaction on IrO (2022)
Journal Article
Velasco Vélez, J. J., Bernsmeier, D., Jones, T. E., Zeller, P., Carbonio, E., Chuang, C., …Schlögl, R. (2022). The rise of electrochemical NAPXPS operated in the soft X-ray regime exemplified by the oxygen evolution reaction on IrO. Faraday Discussions, 236, 103-125. https://doi.org/10.1039/d1fd00114k

Different operando approaches based in PES were used and compared under OER conditions on IrOx. ResPES indicates that single coordinated oxygen atoms (μ1-O) are the active species yielding the formation of peroxo (μ1-OO) and finally O2 as product.

On the stability of isolated iridium sites in N-rich frameworks against agglomeration under reducing conditions (2022)
Journal Article
Iemhoff, A., Vennewald, M., Artz, J., Mebrahtu, C., Meledin, A., Weirich, T. E., …Palkovits, R. (2022). On the stability of isolated iridium sites in N-rich frameworks against agglomeration under reducing conditions. ChemCatChem, 14(9), https://doi.org/10.1002/cctc.202200179

Stabilization of single metal atoms is a persistent challenge in heterogeneous catalysis. Especially supported late transitions metals are prone to undergo agglomeration to nanoparticles under reducing conditions. In this study, nitrogen-rich covalen... Read More about On the stability of isolated iridium sites in N-rich frameworks against agglomeration under reducing conditions.

Elucidating the formation and structural evolution of platinum single-site catalysts for the hydrogen evolution reaction (2022)
Journal Article
Tang, P., Lee, H., Hurlbutt, K., Huang, P., Narayanan, S., Wang, C., …Pasta, M. (2022). Elucidating the formation and structural evolution of platinum single-site catalysts for the hydrogen evolution reaction. ACS catalysis, 12(5), 3173-3180. https://doi.org/10.1021/acscatal.1c05958

Platinum single-site catalysts (SSCs) are a promising technology for the production of hydrogen from clean energy sources. They have high activity and maximal platinum-atom utilization. However, the bonding environment of platinum during operation... Read More about Elucidating the formation and structural evolution of platinum single-site catalysts for the hydrogen evolution reaction.

Dynamics over a Cu–graphite electrode during the gas-phase CO2 reduction investigated by APXPS (2022)
Journal Article
Arrigo, R., Blume, R., Large, A. I., Velasco-Vélez, J. J., Hävecker, M., Knop-Gericke, A., & Held, G. (2022). Dynamics over a Cu–graphite electrode during the gas-phase CO2 reduction investigated by APXPS. Faraday Discussions, 236, 126-140. https://doi.org/10.1039/d1fd00121c

We use ambient pressure X-ray photoelectron and absorption spectroscopies coupled with on-line gas detection to investigate in situ performance and interface chemistry of an electrodeposited Cu on a carbon support under conditions of CO2 reduction.

Dynamics at polarized, carbon dioxide-iron oxyhydroxide interfaces unveil the origin of multicarbon product formation (2021)
Journal Article
Arrigo, R., Blume, R., Streibel, V., Genovese, C., Roldan, A., Schuster, M., …Centi, G. (2022). Dynamics at polarized, carbon dioxide-iron oxyhydroxide interfaces unveil the origin of multicarbon product formation. ACS catalysis, 12(1), 411-430. https://doi.org/10.1021/acscatal.1c04296

Surface-sensitive ambient pressure X-ray photoelectron spectroscopy and near edge X-ray absorption fine structure spectroscopy combined with an electrocatalytic reactivity study, multilength scale electron microscopy and theo-retical modelling provid... Read More about Dynamics at polarized, carbon dioxide-iron oxyhydroxide interfaces unveil the origin of multicarbon product formation.

Surface electron-hole rich species active in the electrocatalytic water oxidation (2021)
Journal Article
Velasco-Vélez, J., Carbonio, E., Chuang, C., Hsu, C., Lee, J., Arrigo, R., …Jones, T. (2021). Surface electron-hole rich species active in the electrocatalytic water oxidation. Abstracts of papers / American Chemical Society, 143(32), 12524-12534. https://doi.org/10.1021/jacs.1c01655

Iridium and ruthenium and their oxides/hydroxides are the best candidates for the oxygen evolution reaction under harsh acidic conditions owing to the low overpotentials observed for Ru- and Ir-based anodes and the high corrosion resistance of Ir-oxi... Read More about Surface electron-hole rich species active in the electrocatalytic water oxidation.

Monitoring dynamics of defects and single Fe atoms in N-functionalized few-layer graphene by in situ temperature programmed scanning transmission electron microscopy (2021)
Journal Article
Arrigo, R., Sasaki, T., Callison, J., Gianolio, D., & Schuster, M. (2022). Monitoring dynamics of defects and single Fe atoms in N-functionalized few-layer graphene by in situ temperature programmed scanning transmission electron microscopy. Journal of Energy Chemistry, 64, 520-530. https://doi.org/10.1016/j.jechem.2021.05.005

In this study, we aim to contribute an understanding of the pathway of formation of Fe species during top-down synthesis of dispersed Fe on N-functionalized few layer graphene. We use X-ray absorption spectroscopy to determine the electronic structur... Read More about Monitoring dynamics of defects and single Fe atoms in N-functionalized few-layer graphene by in situ temperature programmed scanning transmission electron microscopy.

Structural insight into [Fe–S2–Mo] motif in electrochemical reduction of N2 over Fe1-supported molecular MoS2 (2020)
Journal Article
Zheng, J., Wu, S., Lu, L., Huang, C., Ho, P., Kirkland, A., …Edman Tsang, S. (2021). Structural insight into [Fe–S2–Mo] motif in electrochemical reduction of N2 over Fe1-supported molecular MoS2. Chemical Science, 12(2), 688-695. https://doi.org/10.1039/d0sc04575f

The catalytic synthesis of NH3 from the thermodynamically challenging N2 reduction reaction under mild conditions is currently a significant problem for scientists. Accordingly, herein, we report the development of a nitrogenase-inspired inorganic-ba... Read More about Structural insight into [Fe–S2–Mo] motif in electrochemical reduction of N2 over Fe1-supported molecular MoS2.

Investigations of carbon nitride-supported Mn3 O4 oxide nanoparticles for ORR (2020)
Journal Article
Large, A., Wahl, S., Abate, S., da Silva, I., Delgado Jaen, J., Pinna, N., …Arrigo, R. (2020). Investigations of carbon nitride-supported Mn3 O4 oxide nanoparticles for ORR. Catalysts, 10(11), e1289. https://doi.org/10.3390/catal10111289

Earth-abundant Mn-based oxide nanoparticles are supported on carbon nitride using two different immobilization methods and tested for the oxygen reduction reaction. Compared to the metal free CN, the immobilization of Mn oxide enhances not only the e... Read More about Investigations of carbon nitride-supported Mn3 O4 oxide nanoparticles for ORR.

On the activity/selectivity and phase stability of thermally grown copper oxides during the electrocatalytic reduction of CO2 (2020)
Journal Article
Velasco-Vélez, J., Chuang, C., Gao, D., Zhu, Q., Ivanov, D., Jeon, H., …Schlögl, R. (2020). On the activity/selectivity and phase stability of thermally grown copper oxides during the electrocatalytic reduction of CO2. ACS catalysis, 10(19), 11510-11518. https://doi.org/10.1021/acscatal.0c03484

Revealing the active nature of oxide-derived copper is of key importance to understand its remarkable catalytic performance during the cathodic CO2 reduction reaction (CO2RR) to produce valuable hydrocarbons. Using advanced spectroscopy, electron mic... Read More about On the activity/selectivity and phase stability of thermally grown copper oxides during the electrocatalytic reduction of CO2.

Ambient-pressure endstation of the Versatile Soft X-ray (VerSoX) beamline at Diamond Light Source (2020)
Journal Article
Held, G., Venturini, F., Grinter, D., Ferrer, P., Arrigo, R., Deacon, L., …Scott, S. (2020). Ambient-pressure endstation of the Versatile Soft X-ray (VerSoX) beamline at Diamond Light Source. Journal of Synchrotron Radiation, 27(5), 1153-1166. https://doi.org/10.1107/S1600577520009157

The ambient-pressure endstation and branchline of the Versatile Soft X-ray (VerSoX) beamline B07 at Diamond Light Source serves a very diverse user community studying heterogeneous catalysts, pharmaceuticals and biomaterials under realistic condition... Read More about Ambient-pressure endstation of the Versatile Soft X-ray (VerSoX) beamline at Diamond Light Source.

The electronic structure, surface properties, and in situ N2O decomposition of mechanochemically synthesised LaMnO3 (2020)
Journal Article
Blackmore, R., Rivas, M., Tierney, G., Mohammed, K., Decarolis, D., Hayama, S., …Wells, P. (2020). The electronic structure, surface properties, and in situ N2O decomposition of mechanochemically synthesised LaMnO3. Physical Chemistry Chemical Physics, 22(34), 18774-18787. https://doi.org/10.1039/d0cp00793e

The use of mechanochemistry to prepare catalytic materials is of significant interest; it offers an environmentally beneficial, solvent-free, route and produces highly complex structures of mixed amorphous and crystalline phases. This study reports o... Read More about The electronic structure, surface properties, and in situ N2O decomposition of mechanochemically synthesised LaMnO3.

Revealing the active phase of copper during the electroreduction of CO2 in aqueous electrolyte by correlating in situ x-ray spectroscopy and in situ electron microscopy (2020)
Journal Article
Velasco-Velez, J., Mom, R., Sandoval-Diaz, L., Falling, L., Chuang, C., Gao, D., …Schlögl, R. (2020). Revealing the active phase of copper during the electroreduction of CO2 in aqueous electrolyte by correlating in situ x-ray spectroscopy and in situ electron microscopy. ACS Energy Letters, 5(6), 2106-2111. https://doi.org/10.1021/acsenergylett.0c00802

The variation in the morphology and electronic structure of copper during the electroreduction of CO2 into valuable hydrocarbons and alcohols was revealed by combining in situ surface- and bulk-sensitive X-ray spectroscopies with electrochemical scan... Read More about Revealing the active phase of copper during the electroreduction of CO2 in aqueous electrolyte by correlating in situ x-ray spectroscopy and in situ electron microscopy.

Elucidating the mechanism of the CO2 methanation reaction over Ni–Fe hydrotalcite-derived catalysts via surface-sensitive in situ XPS and NEXAFS (2020)
Journal Article
Giorgianni, G., Mebrahtu, C., Schuster, M., Large, A., Held, G., Ferrer, P., …Arrigo, R. (2020). Elucidating the mechanism of the CO2 methanation reaction over Ni–Fe hydrotalcite-derived catalysts via surface-sensitive in situ XPS and NEXAFS. Physical Chemistry Chemical Physics, 22(34), 18788-18797. https://doi.org/10.1039/d0cp00622j

Hydrotalcite-derived Ni and Fe-promoted hydrotalcite-derived Ni catalysts were found to outperform industrial catalysts in the CO2 methanation reaction, however the origin of the improved activity and selectivity of these catalysts is not clear. Here... Read More about Elucidating the mechanism of the CO2 methanation reaction over Ni–Fe hydrotalcite-derived catalysts via surface-sensitive in situ XPS and NEXAFS.

Influence of synthesis conditions on the structure of nickel nanoparticles and their reactivity in selective asymmetric hydrogenation (2019)
Journal Article
Arrigo, R., Gallarati, S., Schuster, M., Seymour, J., Gianolio, D., da Silva, I., …Held, G. (2020). Influence of synthesis conditions on the structure of nickel nanoparticles and their reactivity in selective asymmetric hydrogenation. ChemCatChem, 12(5), 1491-1503. https://doi.org/10.1002/cctc.201901955

Unsupported and SiO2-supported Ni nanoparticles (NPs), were synthesised via hot-injection colloidal route using oleylamine (OAm) and trioctylphosphine (TOP) as reducing and protective agents, respectively. By adopting a multi-length scale structural... Read More about Influence of synthesis conditions on the structure of nickel nanoparticles and their reactivity in selective asymmetric hydrogenation.

On the high structural heterogeneity of Fe impregnated graphite-carbon catalysts from Fe nitrate precursor (2019)
Journal Article
Arrigo, R., & Schuster, M. (2019). On the high structural heterogeneity of Fe impregnated graphite-carbon catalysts from Fe nitrate precursor. Catalysts, 9(4), 303. https://doi.org/10.3390/catal9040303

Wet impregnation is broadly applied for the synthesis of carbon supported metal/metal oxide nanostructures because of its high flexibility, simplicity and low cost. By contrast, impregnated catalysts are typified by a usually undesired nanostructural... Read More about On the high structural heterogeneity of Fe impregnated graphite-carbon catalysts from Fe nitrate precursor.

The role of the copper oxidation state in the electrocatalytic reduction of CO2 into valuable hydrocarbons (2018)
Journal Article
Velasco-Vélez, J., Jones, T., Gao, D., Carbonio, E., Arrigo, R., Hsu, C., …Chuang, C. (2018). The role of the copper oxidation state in the electrocatalytic reduction of CO2 into valuable hydrocarbons. ACS sustainable chemistry & engineering, 7(1), 1485-1492. https://doi.org/10.1021/acssuschemeng.8b05106

Redox-active copper catalysts with accurately prepared oxidation states (Cu0, Cu+ and Cu2+) and high selectivity to C2 hydrocarbon formation, from electrocatalytic cathodic reduction of CO2, were fabricated and characterized. The electrochemically pr... Read More about The role of the copper oxidation state in the electrocatalytic reduction of CO2 into valuable hydrocarbons.

Electrochemically active Ir NPs on graphene for OER in acidic aqueous electrolyte investigated by in situ and ex situ spectroscopies (2018)
Journal Article
Velasco-Vélez, J., Jones, T., Streibel, V., Hävecker, M., Chuang, C., Frevel, L., …Knop-Gericke, A. (2018). Electrochemically active Ir NPs on graphene for OER in acidic aqueous electrolyte investigated by in situ and ex situ spectroscopies. Surface Science, 681(Mar 19), 1-8. https://doi.org/10.1016/j.susc.2018.10.021

An electrode for the oxygen evolution reaction based on a conductive bi-layered free standing graphene support functionalized with iridium nanoparticles was fabricated and characterized by means of potentiometric and advanced X-ray spectroscopic tech... Read More about Electrochemically active Ir NPs on graphene for OER in acidic aqueous electrolyte investigated by in situ and ex situ spectroscopies.

In situ electrochemical cells to study the oxygen evolution reaction by near ambient pressure x-ray photoelectron spectroscopy (2018)
Journal Article
Streibel, V., Hävecker, M., Yi, Y., Velasco Vélez, J., Skorupska, K., Stotz, E., …Arrigo, R. (2018). In situ electrochemical cells to study the oxygen evolution reaction by near ambient pressure x-ray photoelectron spectroscopy. Topics in Catalysis, 61(20), 2064-2084. https://doi.org/10.1007/s11244-018-1061-8

In this contribution, we report the development of in situ electrochemical cells based on proton exchange membranes suitable for studying interfacial structural dynamics of energy materials under operation by near ambient pressure X-ray photoelectron... Read More about In situ electrochemical cells to study the oxygen evolution reaction by near ambient pressure x-ray photoelectron spectroscopy.

Operando spectroscopy study of the carbon dioxide electro-reduction by iron species on nitrogen-doped carbon (2018)
Journal Article
Genovese, C., Schuster, M., Gibson, E., Gianolio, D., Posligua, V., Grau-Crespo, R., …Arrigo, R. (2018). Operando spectroscopy study of the carbon dioxide electro-reduction by iron species on nitrogen-doped carbon. Nature communications, 9, 935. https://doi.org/10.1038/s41467-018-03138-7

The carbon–carbon coupling via electrochemical reduction of carbon dioxide represents the biggest challenge for using this route as platform for chemicals synthesis. Here we show that nanostructured iron (III) oxyhydroxide on nitrogen-doped carbon en... Read More about Operando spectroscopy study of the carbon dioxide electro-reduction by iron species on nitrogen-doped carbon.

In situ observation of reactive oxygen species forming on oxygen-evolving iridium surfaces (2016)
Journal Article
Pfeifer, V., Jones, T., Velasco Vélez, J., Arrigo, R., Piccinin, S., Hävecker, M., …Schlögl, R. (2017). In situ observation of reactive oxygen species forming on oxygen-evolving iridium surfaces. Chemical Science, 8(3), 2143-2149. https://doi.org/10.1039/c6sc04622c

Water splitting performed in acidic media relies on the exceptional performance of iridium-based materials to catalyze the oxygen evolution reaction (OER). In the present work, we use in situ X-ray photoemission and absorption spectroscopy to resolve... Read More about In situ observation of reactive oxygen species forming on oxygen-evolving iridium surfaces.

Acid-base properties of N-doped carbon nanotubes : a combined temperature-programmed desorption, X-ray photoelectron spectroscopy, and 2-propanol reaction investigation (2016)
Journal Article
Ortega, K., Arrigo, R., Frank, B., Schlögl, R., & Trunschke, A. (2016). Acid-base properties of N-doped carbon nanotubes : a combined temperature-programmed desorption, X-ray photoelectron spectroscopy, and 2-propanol reaction investigation. Chemistry of Materials, 28(19), 6826-6839. https://doi.org/10.1021/acs.chemmater.6b01594

Chemical and electronic properties of N-doped multiwalled carbon nanotubes (NCNTs) synthesized by NH3 treatment of preoxidized CNTs at 300, 500, and 700°C have been investigated by a set of surface sensitive techniques. Temperature-programmed desorpt... Read More about Acid-base properties of N-doped carbon nanotubes : a combined temperature-programmed desorption, X-ray photoelectron spectroscopy, and 2-propanol reaction investigation.

Pd supported on carbon nitride boosts the direct hydrogen peroxide synthesis (2016)
Journal Article
Arrigo, R., Schuster, M., Abate, S., Giorgianni, G., Centi, G., Perathoner, S., …Schlögl, R. (2016). Pd supported on carbon nitride boosts the direct hydrogen peroxide synthesis. ACS catalysis, 6(10), 6959-6966. https://doi.org/10.1021/acscatal.6b01889

Herein, the development of an improved Pd on carbon nitride catalyst for direct H2O2 synthesis from the elements is reported. Microcalorimetric CO chemisorption is used to characterize the chemical speciation of the Pd-selective and -unselective si... Read More about Pd supported on carbon nitride boosts the direct hydrogen peroxide synthesis.

Reactive oxygen species in iridium-based OER catalysts (2016)
Journal Article
Arrigo, R. (2016). Reactive oxygen species in iridium-based OER catalysts. Chemical Science, 2016(7), 6791-6795. https://doi.org/10.1039/c6sc01860b

Tremendous effort has been devoted towards elucidating the fundamental reasons for the higher activity of hydrated amorphous IrIII/IV oxyhydroxides (IrOx) in the oxygen evolution reaction (OER) in comparison with their crystalline counterpart, ruti... Read More about Reactive oxygen species in iridium-based OER catalysts.

Characterization of platinum and iridium oxyhydrate surface layers from platinum and iridium foils (2016)
Journal Article
Johnson, B., Ranjan, C., Greiner, M., Arrigo, R., Schuster, M., Höpfner, B., …Schlögl, R. (2016). Characterization of platinum and iridium oxyhydrate surface layers from platinum and iridium foils. ChemSusChem, 9(13), 1634-1646. https://doi.org/10.1002/cssc.201600143

Platinum and iridium polycrystalline foils were oxidized electrochemically through anodization to create thin platinum and iridium hydrous oxide layers, which were analyzed through laboratory photoelectron spectroscopy during heating and time series... Read More about Characterization of platinum and iridium oxyhydrate surface layers from platinum and iridium foils.

The electronic structure of iridium oxide electrodes active in water splitting (2015)
Journal Article
Pfeifer, V., Jones, T., Velasco Vélez, J., Massué, C., Greiner, M., Arrigo, R., …Schlögl, R. (2015). The electronic structure of iridium oxide electrodes active in water splitting. Physical Chemistry Chemical Physics, 2016(18), 2292-2296. https://doi.org/10.1039/c5cp06997a

Iridium oxide based electrodes are among the most promising candidates for electrocatalyzing the oxygen evolution reaction, making it imperative to understand their chemical/electronic structure. However, the complexity of iridium oxide's electronic... Read More about The electronic structure of iridium oxide electrodes active in water splitting.

Photoelectron spectroscopy at the graphene-liquid interface reveals the electronic structure of an electrodeposited cobalt/graphene electrocatalyst (2015)
Journal Article
Velasco-Vélez, J., Pfeifer, V., Hävecker, M., Weatherup, R., Arrigo, R., Chuang, C., …Knop-Gericke, A. (2018). Photoelectron spectroscopy at the graphene-liquid interface reveals the electronic structure of an electrodeposited cobalt/graphene electrocatalyst. Angewandte Chemie International Edition, 54(48), 14554-14558. https://doi.org/10.1002/anie.201506044

Electrochemically grown cobalt on graphene exhibits exceptional performance as a catalyst for the oxygen evolution reaction (OER) and provides the possibility of controlling the morphology and the chemical properties during deposition. However, the d... Read More about Photoelectron spectroscopy at the graphene-liquid interface reveals the electronic structure of an electrodeposited cobalt/graphene electrocatalyst.

In situ investigation of dissociation and migration phenomena at the Pt/electrolyte interface of an electrochemical cell (2015)
Journal Article
Law, Y., Zafeiratos, S., Neophytides, S., Orfanidi, A., Costa, D., Dintzer, T., …Savinova, E. (2015). In situ investigation of dissociation and migration phenomena at the Pt/electrolyte interface of an electrochemical cell. Chemical Science, 6(10), 5635-5642. https://doi.org/10.1039/c5sc01421b

The development of efficient energy conversion systems requires precise engineering of electrochemical interfaces and thus asks for in situ techniques to probe the structure and the composition of the dynamic electrode/electrolyte interfacial region.... Read More about In situ investigation of dissociation and migration phenomena at the Pt/electrolyte interface of an electrochemical cell.

Nature of the N-Pd interaction in nitrogen-doped carbon nanotube catalysts (2015)
Journal Article
Arrigo, R. (2015). Nature of the N-Pd interaction in nitrogen-doped carbon nanotube catalysts. ACS catalysis, 5(5), 2740-2753. https://doi.org/10.1021/acscatal.5b00094

In this work, the geometric and electronic structure of N species in N-doped carbon nanotubes (NCNTs) is derived by X-ray photoemission (XPS) and absorption spectroscopy (NEXAFS) of the N 1s core excitation. Substitutional N species in pyridine-like... Read More about Nature of the N-Pd interaction in nitrogen-doped carbon nanotube catalysts.

Dynamics of palladium on nanocarbon in the direct synthesis of H2O2 (2013)
Journal Article
Arrigo, R., Schuster, M., Abate, S., Wrabetz, S., Amakawa, K., Teschner, D., …Schlögl, R. (2013). Dynamics of palladium on nanocarbon in the direct synthesis of H2O2. ChemSusChem, 7(1), 179-194. https://doi.org/10.1002/cssc.201300616

This work aims to clarify the nanostructural transformation accompanying the loss of activity and selectivity for the hydrogen peroxide synthesis of palladium and gold–palladium nanoparticles supported on N‐functionalized carbon nanotubes. High‐resol... Read More about Dynamics of palladium on nanocarbon in the direct synthesis of H2O2.