Pyridine vs. Imidazole Axial Ligation on Cobaloxime Grafted Graphene: Hydrogen Evolution Reaction Insights

Sideri, Ioanna K. ; Charalambidis, Georgios ; Coutsolelos, Athanassios G. ; Arenal, Raul ; Tagmatarchis, Nikos

Resumen: While cobaloximes have been protagonists in the molecular (photo)catalytic hydrogen evolution reaction field, researchers originally shed light on the catalytically active metallic center. However, the specific chemical environment of cobalt, including equatorial and axial ligation, has also a strong impact on the catalytic reaction. In this article, we aim to demonstrate how pyridine vs. imidazole axial ligation of a cobaloxime complex covalently grafted on graphene affects the hydrogen evolution reaction performance in realistic acidic conditions. While pyridine axial ligation mirrors a drastically superior electrocatalytic performance, imidazole exhibits a remarkable long-term stability.

Idioma: Inglés

DOI: 10.3390/nano12173077

Año: 2022

Publicado en: Nanomaterials 12, 17 (2022), 3077 [18 pp.]
ISSN: 2079-4991

Factor impacto JCR: 5.3 (2022)

Categ. JCR: PHYSICS, APPLIED rank: 39 / 160 = 0.244 (2022) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 51 / 107 = 0.477 (2022) - Q2 - T2
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 58 / 178 = 0.326 (2022) - Q2 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 110 / 343 = 0.321 (2022) - Q2 - T1

Factor impacto CITESCORE: 7.4 - Chemical Engineering (Q1) - Materials Science (Q1)

Factor impacto SCIMAGO: 0.811 - Chemical Engineering (miscellaneous) (Q1) - Materials Science (miscellaneous) (Q2)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E13-20R
Financiación: info:eu-repo/grantAgreement/EC/H2020/823717/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM3
Financiación: info:eu-repo/grantAgreement/EC/H2020/881603/EU/Graphene Flagship Core Project 3/GrapheneCore3
Financiación: info:eu-repo/grantAgreement/ES/MICINN-AEI/PID2019-104739GB-I00/AEI-10.13039-501100011033

Tipo y forma: Article (Published version)