Dr Rosa Arrigo's Outputs (45)

Valorisation of citrus waste for sustainable synthesis of carbon-supported copper nanoparticles active in CO 2 electroreduction (2024)
Journal Article

This study describes a microwave-assisted hydrothermal method to synthesise carbon-supported Cu-based electrocatalysts for CO2 conversion using citrus peels as both the carbon precursor and the reducing agent for Cu cations. XPS, TEM, and XRD analyse... Read More about Valorisation of citrus waste for sustainable synthesis of carbon-supported copper nanoparticles active in CO 2 electroreduction.

Alkali Metal Iridates as Oxygen Evolution Catalysts Via Thermal Transformation of Amorphous Iridium (oxy)hydroxides (2024)
Journal Article
Falsaperna, M., Arrigo, R., Marken, F., & Freakley, S. (in press). Alkali Metal Iridates as Oxygen Evolution Catalysts Via Thermal Transformation of Amorphous Iridium (oxy)hydroxides. ChemCatChem, Article e202401326. https://doi.org/10.1002/cctc.202401326

Achieving efficient water‐splitting under acidic conditions for hydrogen production is severely limited by the anodic oxygen evolution reaction (OER). Overcoming this obstacle is vital to realise effective electrolysers and deliver a hydrogen‐driven... Read More about Alkali Metal Iridates as Oxygen Evolution Catalysts Via Thermal Transformation of Amorphous Iridium (oxy)hydroxides.

Investigation on the structure and performance of supported Ni nanoparticles for the hydrogenation of furfural (2024)
Journal Article

In this study, nickel nanoparticles were successfully synthesized using two methods: the hot‐injection method and a room temperature colloidal synthesis using dioctyl tartrate as a capping agent. Each approach yielded Ni nanoparticles with unique mor... Read More about Investigation on the structure and performance of supported Ni nanoparticles for the hydrogenation of furfural.

Synthesis and Characterisation of Metal Organic Frameworks for Use as Drug Delivery Systems in Neuroblastoma Therapy (2024)
Thesis

Gliotoxin, a secondary metabolite isolated from the fungi, Aspergillus fumigatus has
shown cytotoxic activity against neuroblastoma, a type of cancer accounting for 15%
of all childhood cancer-related deaths. But as with all other chemotherapeutic... Read More about Synthesis and Characterisation of Metal Organic Frameworks for Use as Drug Delivery Systems in Neuroblastoma Therapy.

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

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

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.

Cationic Copper Species Stabilized by Zinc during the Electrocatalytic Reduction of CO2 Revealed by In Situ X‐Ray Spectroscopy (2023)
Journal Article

Advanced in situ X-ray absorption spectroscopy characterization of electrochemically co-electrodeposited bi-element copper alloy electrodes shows that zinc yields the formation of a stable cationic Cu species during the electroreduction of CO2 at hig... Read More about Cationic Copper Species Stabilized by Zinc during the Electrocatalytic Reduction of CO2 Revealed by In Situ X‐Ray Spectroscopy.

Insights by in-situ studies on the nature of highly-active hydrotalcite-based Ni-Fe catalysts for CO2 methanation (2023)
Journal Article

Designing CO2 methanation catalysts that meet industrial requirements is still challenging. We report Ni-Fe hydrotalcite-derived catalysts with a wide range of Ni and Mg loadings showing that an optimised composition with Ni0.4 gives a very high CO2... Read More about Insights by in-situ studies on the nature of highly-active hydrotalcite-based Ni-Fe catalysts for CO2 methanation.

Lithium-Directed Transformation of Amorphous Iridium (Oxy)hydroxides To Produce Active Water Oxidation Catalysts (2023)
Journal Article

The oxygen evolution reaction (OER) is crucial to future energy systems based on water electrolysis. Iridium oxides are promising catalysts due to their resistance to corrosion under acidic and oxidizing conditions. Highly active iridium (oxy)hydroxi... Read More about Lithium-Directed Transformation of Amorphous Iridium (Oxy)hydroxides To Produce Active Water Oxidation Catalysts.

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

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 versatile soft X-ray (VerSoX) beamline at diamond light source (2022)
Journal Article

The rise of electrochemical NAPXPS operated in the soft X-ray regime exemplified by the oxygen evolution reaction on IrO (2022)
Journal Article

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

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

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

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.