A Molecular Copper Catalyst for Electrochemical Water Reduction with a Large Hydrogen-Generation Rate Constant in Aqueous Solution
2014 (English)In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 53, no 50, 13803-13807 p.Article in journal (Refereed) Published
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+).
Place, publisher, year, edition, pages
2014. Vol. 53, no 50, 13803-13807 p.
copper, electrocatalysis, hydrogen, water reduction
IdentifiersURN: urn:nbn:se:kth:diva-158434DOI: 10.1002/anie.201408266ISI: 000345833100028PubMedID: 25314646ScopusID: 2-s2.0-84919347014OAI: oai:DiVA.org:kth-158434DiVA: diva2:777882
FunderSwedish Research CouncilSwedish Energy AgencyKnut and Alice Wallenberg Foundation
QC 201501092015-01-092015-01-082015-01-09Bibliographically approved