Electrocatalysis of Sandwich-Structured Pd/Polypyrrole/Pd Composites toward Formic Acid Oxidation

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• 作者：Keqiang Ding ; Haitao Jia ; Suying Wei ; Zhanhu Guo
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：June 1, 2011
• 年：2011
• 卷：50
• 期：11
• 页码：7077-7082
• 全文大小：914K
• 年卷期：v.50,no.11(June 1, 2011)
• ISSN：1520-5045

文摘

Palladium (Pd) nanoparticle catalysts were electrodeposited onto a graphite electrode by cyclic voltammetry (CV) technique from a 0.5 M HCl solution containing 0.2 M PdCl₂, and then a film of polypyrrole (PPy) was immobilized onto the as-prepared Pd-coated graphite electrode, leading to a PPy/Pd-coated electrode. Pd particles were repeatedly electrodeposited on the PPy/Pd-coated electrode to generate a Pd/PPy/Pd sandwich structured composite coated electrode. This developed composite electrode showed a satisfactory electrocatalysis toward the formic acid oxidation (FAO). The catalysis mechanism of the sandwich structured Pd/PPy/Pd composite catalyst toward FAO was also discussed on the basis of the obtained cyclic voltammograms and FT-IR spectra.