Adsorbed formate

the key intermediate in the oxidation of formic acid on platinum electrodes

Angel Cuesta, Gema Cabello, Claudio Gutierrez, Masatoshi Osawa

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

The electrooxidation of formic acid on Pt and other noble metal electrodes proceeds through a dual-path mechanism, composed of a direct path and an indirect path through adsorbed carbon monoxide, a poisoning intermediate. Adsorbed formate had been identified as the reactive intermediate in the direct path. Here we show that actually it is also the intermediate in the indirect path and is, hence, the key reaction intermediate, common to both the direct and indirect paths. Furthermore, it is confirmed that the dehydration of formic acid on Pt electrodes requires adjacent empty sites, and it is demonstrated that the reaction follows an apparently paradoxical electrochemical mechanism, in which an oxidation is immediately followed by a reduction.
Original languageEnglish
Pages (from-to)20091-20095
Number of pages5
JournalPhysical Chemistry Chemical Physics
Volume13
Issue number45
Early online date25 Oct 2011
DOIs
Publication statusPublished - 7 Dec 2011

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formic acid
formates
Platinum
platinum
Oxidation
oxidation
Electrodes
electrodes
Reaction intermediates
Electrooxidation
Carbon Monoxide
Precious metals
Dehydration
reaction intermediates
poisoning
noble metals
dehydration
carbon monoxide

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Adsorbed formate : the key intermediate in the oxidation of formic acid on platinum electrodes. / Cuesta, Angel; Cabello, Gema; Gutierrez, Claudio; Osawa, Masatoshi.

In: Physical Chemistry Chemical Physics, Vol. 13, No. 45, 07.12.2011, p. 20091-20095.

Research output: Contribution to journalArticle

Cuesta, Angel ; Cabello, Gema ; Gutierrez, Claudio ; Osawa, Masatoshi. / Adsorbed formate : the key intermediate in the oxidation of formic acid on platinum electrodes. In: Physical Chemistry Chemical Physics. 2011 ; Vol. 13, No. 45. pp. 20091-20095.
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