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Dr Rosa Arrigo's Outputs (46)

Dynamics at polarized, carbon dioxide-iron oxyhydroxide interfaces unveil the origin of multicarbon product formation (2021)
Journal Article

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.

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

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

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.

On the activity/selectivity and phase stability of thermally grown copper oxides during the electrocatalytic reduction of CO2 (2020)
Journal Article

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.

The electronic structure, surface properties, and in situ N2O decomposition of mechanochemically synthesised LaMnO3 (2020)
Journal Article

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

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

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

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

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

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

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

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.

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.

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.