Issue 15, 2023

Electrochemical hydrogen evolution reaction catalysed by a dinuclear cobalt complex with doubly N-confused hexaphyrin

Abstract

In this study, we discovered the high catalytic activity of a dinuclear cobalt complex, Co2DNCH, supported by a doubly N-confused hexaphyrin (DNCH), a kind of ring-expanded porphyrin, for the electrochemical hydrogen evolution reaction. Co2DNCH catalysed electrochemical hydrogen evolution reaction with onset-overpotential η = 0.45 V in water at pH 7.0, and with η = 0.54 V and turnover frequency TOF = 2.27 × 104 s−1 in DMF containing Et3NHCl as a proton source. Furthermore, electrochemical measurements and density functional theory calculations elucidated that the large π-conjugated system of the DNCH ligand enables two-electron reduction centred on DNCH and hydrogen evolution at a relatively positive potential.

Graphical abstract: Electrochemical hydrogen evolution reaction catalysed by a dinuclear cobalt complex with doubly N-confused hexaphyrin

Supplementary files

Article information

Article type
Paper
Submitted
27 Mar 2023
Accepted
26 May 2023
First published
26 May 2023
This article is Open Access
Creative Commons BY-NC license

Sustainable Energy Fuels, 2023,7, 3603-3608

Electrochemical hydrogen evolution reaction catalysed by a dinuclear cobalt complex with doubly N-confused hexaphyrin

R. Takada, T. Nakazono, T. Nishimura, T. Shiga, M. Nihei, Y. Yamada and T. Wada, Sustainable Energy Fuels, 2023, 7, 3603 DOI: 10.1039/D3SE00403A

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