Hydrogen generation from weak acids: Electrochemical and computational studies of a diiron hydrogenase mimic

Greg A.N. Felton, Aaron K. Vannucci, Jinzhu Chen, L. Tori Lockett, Noriko Okumura, Benjamin J. Petro, Uzma I. Zakai, Dennis H. Evans, Richard S. Glass, Dennis L. Lichtenberger

Research output: Contribution to journalArticlepeer-review

287 Scopus citations

Abstract

Extended investigation of electrocatalytic generation of dihydrogen using [(μ-1,2-benzenedithiolato)][Fe(CO)3]2 has revealed that weak acids, such as acetic acid, can be used. The catalytic reduction producing dihydrogen occurs at approximately -2 V for several carboxylic acids and phenols resulting in overpotentials of only -0.44 to -0.71 V depending on the weak acid used. This unusual catalytic reduction occurs at a potential at which the starting material, in the absence of a proton source, does not show a reduction peak. The mechanism for this process and structures for the intermediates have been discerned by electrochemical and computational analysis. These studies reveal that the catalyst is the monoanion of the starting material and an ECEC mechanism occurs.

Original languageEnglish (US)
Pages (from-to)12521-12530
Number of pages10
JournalJournal of the American Chemical Society
Volume129
Issue number41
DOIs
StatePublished - Oct 17 2007

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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