The electrocatalytic oxidation of methanol by a ruthenium(V) oxo complex

Yip Kai Lai, Kwok Yin Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)

Abstract

cis-[Ruv(L)(Cl)(O)]2+(L = N,N′-dimethyl-N,N′-bis(2-pyridylmethyl)ethylenediamine) is an active catalyst for the electro-oxidation of methanol in solution. The second order rate constants for the reaction between cis-[Ruv(L)(Cl)(O)]2+and CH3OH, CH3OD and CD3OH evaluated by rotating disc voltammetry are (6.6 ± 0.6) × 102, (5.5 ± 0.6) × 102and (6.6 ± 0.5) × 10dm3mol-1s-1, respectively. The large kinetic isotope effect for CH3OH (kH/kD= 10) indicates the importance of α-CH bond cleavage in the transition state. A chemically modified electrode prepared by immobilization of the ruthenium complex inside a Nafion film on the pyrolytic graphite electrode surface is capable of catalyzing the electro-oxidation of methanol. Reduction and/or oxidation of the complex inside Nafion would lead to the irreversible conversion of the catalyst to a new species which is catalytically inactive.
Original languageEnglish
Pages (from-to)1015-1021
Number of pages7
JournalElectrochimica Acta
Volume38
Issue number7
DOIs
Publication statusPublished - 1 Jan 1993

Keywords

  • methanol oxidation
  • Nafion films
  • ruthenium catalyst

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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