Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 50, Pages 13803-13807Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201408266
Keywords
copper; electrocatalysis; hydrogen; water reduction
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Funding
- Natural Science Foundation of China [21373040, 21120102036, 21361130020, 91233201]
- Basic Research Program of China [2014CB239402]
- Ph.D. Program Foundation of the Ministry of Education of China [20130041110024]
- Swedish Research Council
- Swedish Energy Agency
- K & A Wallenberg Foundation
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The copper complex [(bztpen)Cu](BF4)(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 10000s(-1). A turnover frequency (TOF) of 7000h(-1)cm(-2) and a Faradaic efficiency of 96% were obtained from a controlled potential electrolysis (CPE) experiment with [(bztpen)Cu](2+) in pH2.5 buffer solution at -0.90V 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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