Electrooxidation of Carbon Monoxide on Pd Thin Film-Coated Au Electrodes:Film Thickness Dependence

Authors

Yuqing Yang
Shouzhong Zou

Corresponding Author

Shouzhong Zou(szou@american.edu)

Abstract

The adsorption and electrooxidation of CO on Pd-coated Au electrodes were studied by cyclic voltammetry and surface-enhanced Raman spectroscopy (SERS) . It is found that CO oxidation activity is film thickness dependent. Cyclic voltammograms (CVs) showed that CO oxidation peak potential shifted positively with the increase of the Pd thickness. SERS showed a redshift of the C—O stretching frequency with increasing Pd film thickness. These observations were explained by the dband theory. The strain effect strengthens CO adsorption and stabilizes adsorbed CO,while the ligand effect weakens CO adsorption and eases its oxidation. The ligand effect overpowers the strain effect.

Keywords

CO oxidation, Pd thin film, d-band theory, SERS

DOI Link

https://doi.org/10.61558/2993-074X.2809

Publication Date

2010-08-28

Online Available Date

2010-08-28

Revised Date

2010-08-28

Received Date

2010-08-28

Recommended Citation

Yuqing Yang, Shouzhong Zou. Electrooxidation of Carbon Monoxide on Pd Thin Film-Coated Au Electrodes:Film Thickness Dependence[J]. Journal of Electrochemistry, 2010 , 16(3): Article 3.
DOI: 10.61558/2993-074X.2809
Available at: https://jelectrochem.xmu.edu.cn/journal/vol16/iss3/3

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