Kinetics for electro-oxidation of ethanol on thermally prepared ruthenium oxide in alkaline solution

Journal Article · Wed Mar 01 04:00:00 EST 1995 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.2048541· OSTI ID:40320

Shieh, D T; Hwang, B J ^[1]

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1. National Taiwan Inst. of Technology, Taipei (Taiwan, Province of China). Dept. of Chemical Engineering

The electro-oxidation of ethanol on thermally prepared ruthenium oxide in alkaline solution was investigated by rotating-disk electrode (RDE) and polarization techniques. The oxidation of ethanol was mediated by perruthenate electrogenerated on the electrode surface. The following mechanism of ethanol oxidation on ruthenium oxide was proposed. Heterogeneous reactions: RuO{sub 4}{sup 2{minus}} {r_equilibrium} RuO{sub 4}{sup {minus}} + e{sup {minus}}; RuO{sub 4}{sup {minus}} + CH{sub 3}CH{sub 2}OH + OH {yields} CH{sub 3}CH(RuO{sub 4}{sup 2{minus}})OH + H{sub 2}O; and CH{sub 3}CH(RuO{sub 4}{sup 2{minus}})OH + RuO{sub 4}{sup {minus}} + OH{sup {minus}} {yields} CH{sub 3}CHO + 2RuO{sub 4}{sup 2{minus}} + H{sub 2}O. Homogeneous reaction: CH{sub 3}CHO + CH{sub 3}CHO {r_equilibrium} CH{sub 3}CHOHCH{sub 2}CHO. The kinetic parameters also were obtained by comparing the developed kinetic model and the experimental results.

• Sponsoring Organization: USDOE
• OSTI ID: 40320
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 3 Vol. 142; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
ELECTROLYSIS
ETHANOL
KINETIC EQUATIONS
MEASURING METHODS
OXIDATION
RUTHENIUM OXIDES