Electrocatalytic Oxidation of Formic Acid on Molybdate-Modified Platinum Electrode

Authors

Jun-hua DU
Xue-hui XU
Hong LI
Hong-yu CHENG
Wei-shan LI

Corresponding Author

Wei-shan LI(liwsh@scnu.edu.cn)

Abstract

The electrochemical behavior of molybdates on a platinum electrode in H 2SO 4 solutions with different H 2SO 4 concentrations was studied by cyclic voltammetry and double chronoamperometry. Molybdates were reduced to adsorb hydrogen molybdenum bronzes on the platinum electrode in H 2SO 4 solutions during cathodically potential sweep. The hydrogen molybdenum bronzes were oxidized to different forms of hydrogen molybdenum bronzes with less hydrogen, depending on the H 2SO 4 concentration. Platinum electrode was modified by these hydrogen molybdenum bronzes. However, this modified electrode was not stable in H 2SO 4 solutions. The modified electrode was used to study the oxidation of formic acid in Na 2SO 4 solutions.It was shown that there was a strong catalysis on the oxidation of formic acid on the modified electrode. The peak current of formic acid on the modified electrode was about two times that on unmodified electrode. It was also found that the catalysis was weakened when the platinum elecdtrode was under-or over-modified.

Keywords

Platinum, Hydrogen molybdenum bronze, Modification, Fomic acid, Catalyticoxidation

DOI Link

https://doi.org/10.61558/2993-074X.3308

Publication Date

2002-11-28

Online Available Date

2002-11-28

Revised Date

2002-11-28

Received Date

2002-11-28

Recommended Citation

Jun-hua DU, Xue-hui XU, Hong LI, Hong-yu CHENG, Wei-shan LI. Electrocatalytic Oxidation of Formic Acid on Molybdate-Modified Platinum Electrode[J]. Journal of Electrochemistry, 2002 , 8(4): Article 14.
DOI: 10.61558/2993-074X.3308
Available at: https://jelectrochem.xmu.edu.cn/journal/vol8/iss4/14

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