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
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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