A Molecular Copper Catalyst for Electrochemical Water Reduction with a Large Hydrogen‐Generation Rate Constant in Aqueous Solution | Zendy

Zhang Peili | Zendy; Wang Mei | Zendy; Yang Yong | Zendy; Yao Tianyi | Zendy; Sun Licheng | Zendy

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A Molecular Copper Catalyst for Electrochemical Water Reduction with a Large Hydrogen‐Generation Rate Constant in Aqueous Solution

Author(s) -

Zhang Peili,

Wang Mei,

Yang Yong,

Yao Tianyi,

Sun Licheng

Publication year - 2014

Publication title -

angewandte chemie

Language(s) - English

Resource type - Journals

eISSN - 1521-3757

pISSN - 0044-8249

DOI - 10.1002/ange.201408266

Subject(s) - chemistry , aqueous solution , electrochemistry , catalysis , electrolysis , inorganic chemistry , copper , reaction rate constant , ethylenediamine , electrolysis of water , hydrogen , glassy carbon , standard hydrogen electrode , hydrogen production , electrode , reference electrode , kinetics , cyclic voltammetry , organic chemistry , physics , quantum mechanics , electrolyte

The copper complex [(bztpen)Cu](BF 4 ) 2 (bztpen= N ‐benzyl‐ N , N ′, N ′‐tris(pyridin‐2‐ylmethyl)ethylenediamine) displays high catalytic activity for electrochemical proton reduction in acidic aqueous solutions, with a calculated hydrogen‐generation rate constant ( k obs ) of over 10000 s −1 . A turnover frequency (TOF) of 7000 h −1 cm −2 and a Faradaic efficiency of 96 % were obtained from a controlled potential electrolysis (CPE) experiment with [(bztpen)Cu] 2+ in pH 2.5 buffer solution at −0.90 V versus the standard hydrogen electrode (SHE) over two hours using a glassy carbon electrode. A mechanism involving two proton‐coupled reduction steps was proposed for the dihydrogen generation reaction catalyzed by [(bztpen)Cu] 2+ .

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