Journal
SUSTAINABLE ENERGY & FUELS
Volume 6, Issue 1, Pages 143-149Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1se01267c
Keywords
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Funding
- French National Research Agency (Labex ARCANE, CBH-EUR-GS) [ANR-17-EURE-0003]
- European Research Council [306398]
- European Commission's Seventh Framework Program (FP7/2007-2013) [306398]
- European Union's Horizon 2020 Research and Innovation program [765376]
- Chinese Scientific Council
- European Research Council (ERC) [306398] Funding Source: European Research Council (ERC)
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The cobalt tetraazamacrocyclic [Co(N4H)Cl-2](+) complex is a popular and versatile catalyst for electrocatalytic hydrogen evolution due to its stability and superior activity in aqueous conditions. By analyzing cyclic voltammograms under non-aqueous conditions, a detailed mechanism and quantitative determination of rate-constants for protonation steps were proposed, with the identification of the amine function as a proton relay during H-2 evolution.
The cobalt tetraazamacrocyclic [Co(N4H)Cl-2](+) complex is becoming a popular and versatile catalyst for the electrocatalytic evolution of hydrogen, because of its stability and superior activity in aqueous conditions. We present here a benchmarking of its performances based on the thorough analysis of cyclic voltammograms recorded under various catalytic regimes in non-aqueous conditions allowing control of the proton concentration. This allowed a detailed mechanism to be proposed with quantitative determination of the rate-constants for the various protonation steps, as well as identification of the amine function of the tetraazamacrocyclic ligand to act as a proton relay during H-2 evolution.
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