Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
812 0 |
SM ISO690:2012 STRĂISTARI, Tatiana, FIZE, Jennifer, SHOVA, Sergiu, REGLIER, Marius, ARTERO, Vincent, ORIO, Maylis. A Thiosemicarbazone–Nickel(II) Complex as Efficient Electrocatalyst for Hydrogen Evolution. In: ChemCatChem, 2017, nr. 9(12), pp. 2262-2268. ISSN 1867-3880. DOI: https://doi.org/10.1002/cctc.201600967 |
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ChemCatChem | |
Numărul 9(12) / 2017 / ISSN 1867-3880 | |
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DOI:https://doi.org/10.1002/cctc.201600967 | |
Pag. 2262-2268 | |
Rezumat | |
We report herein the synthesis and characterization of a new mononuclear nickel complex based on a thiosemicarbazone ligand that exhibits an electrocatalytic behavior for H2 evolution in DMF using trifluoroacetic acid (TFA) as the proton source. Catalysis is observed at quite small overpotential values and a maximum turnover frequency (TOFmax) of 3080 s−1 was extrapolated for 1 m proton concentration using the foot-of-the wave analysis of cyclic voltammetry data. Gas analysis during controlled potential electrolysis experiments confirmed the catalytic nature of the process and production of dihydrogen with 80 % faradaic yield. Quantum chemical calculations indicate that the catalytic mechanism involves first ligand-based reduction and protonation steps followed by metal-centered processes. |
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Cuvinte-cheie bioinorganic chemistry, ligand effects, electrochemistry, hydrogen, nickel |
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