Anodic oxidation of formic acid on electrodeposited Pt/WO{sub 3} electrode at room temperature

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.2044181· OSTI ID:64780

Chen, K Y; Shen, P K; Tseung, A C.C. ^[1]

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1. Univ. of Essex, Colchester (United Kingdom)

Work by Tseung et al. has shown that electrodeposited Pt/WO{sub 3} is very active for the oxidation of methanol in sulfuric acid solution. Formic acid, one of the by-products of methanol oxidation, is oxidized via dual-path mechanism leading either to a reactive intermediate COOH{sub ad} or to a poisoning species CO{sub ad} or COH{sub ad}. 5M formic acid was anodically oxidized on a Pt/WO{sub 3} electrode at 50 mA/cm{sup 2} over a test period of 175 h at 0.34 V vs. NHE at 20 C without any poisoning effects. On a platinized electrode, at a fixed current density of 43.8 mA/cm{sup 2}, the potential was 0.43 V. The potential of the platinized electrode started to oscillate after a test period of 30 h and eventually shifted to the oxygen evolution potential.

• Sponsoring Organization: USDOE
• OSTI ID: 64780
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 4 Vol. 142; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
ALCOHOL FUEL CELLS
ANODES
DEACTIVATION
ELECTRIC POTENTIAL
ELECTROCHEMISTRY
EXPERIMENTAL DATA
FORMIC ACID
OXIDATION
PLATINUM
TUNGSTEN OXIDES