Preparation of Polypyrrole-Carbon Black Supported Pd Catalyst for Formic Acid Electrooxidation

doi:10.6023/A1201091

Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (16): 1743-1747.DOI: 10.6023/A1201091 Previous Articles Next Articles

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聚吡咯-碳载Pd催化剂的制备及对甲酸的电催化氧化

刘佳佳^a, 邬冰^a,b, 高颖^a,b

a 哈尔滨师范大学化学化工学院哈尔滨 150025;
b 功能材料的设计合成与绿色催化黑龙江省高校重点实验室哈尔滨 150025

投稿日期:2012-01-09 发布日期:2012-06-14
通讯作者: 高颖
基金资助:
项目受黑龙江省自然科学基金(Nos. B200905, B201002)、哈尔滨市科技创新人才专项基金(No. 2010RFXXG018)和黑龙江省高校科技创新团队建设计划(No. 2011TD010)资助.

Preparation of Polypyrrole-Carbon Black Supported Pd Catalyst for Formic Acid Electrooxidation

Liu Jiajia^a, Wu Bing^a,b, Gao Ying^a,b

a College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025;
b Key Laboratory of Design and Synthesis of Functional Materials and Green Catalysis, Harbin 150025

Received:2012-01-09 Published:2012-06-14
Supported by:
Project supported by the Natural Science Foundation of Heilongjiang Province (Nos. B200905, B201002), the Youth Fund of Harbin Science and Technology Bureau (No. 2010RFXXG018) and Program for Scientific and Technological Innovation Team Construction in Universities of Heilongjiang (No. 2011TD010).

Direct formic acid fuel cells are environmentally friendly technologies and have attracted more and more attention as a new generation of power source. Pd is an important noble metal that is widely used in heterogeneous catalysis. In order to disperse Pd nanoparticles and to improve their catalytic efficiency and stability, polypyrrole are generally used as supporting materials due to their structures and electrical properties. In this work, polypyrrole composite (PPy-C) encompassed of carbon black are synthesized by low temperature oxidation of pyrrole on carbon black and the nanosized Pd catalyst supported by PPy-C is prepared. The support PPy-C and the catalyst Pd/PPy-C are characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The TEM results show that the morphology of Pd/PPy-C and Pd/PPy-C is not the same. Pd deposited on PPy-C are nanoparticle clusters. The average particle size of metal Pd in Pd/C and Pd/PPy-C catalysts are 4.2 and 3.8 nm obtained from XRD diffraction peak. The results from formic acid oxidation show that the Pd/PPy-C catalyst exhibits better activity and stability in contrary to Pd/C. After 160 potential cycles, the formic acid oxidation current reduced to 8% of the first lap on Pd/C, but 50% on Pd/PPy-C. Therefore, the Pd/PPy-C catalyst is a promising anode catalyst in direct formic acid fuel cells. By analyzing formic acid oxidation current in the experiment of multi-step potential, it shows that the main reasons of the decrease of the oxidation current are the unstabitily of the support and the strong adsorption species on the electrode surface.

Key words: Pd, polypyrrole, formic acid, electrocatalyst

Cite this article

Liu Jiajia, Wu Bing, Gao Ying. Preparation of Polypyrrole-Carbon Black Supported Pd Catalyst for Formic Acid Electrooxidation[J]. Acta Chimica Sinica, 2012, 70(16): 1743-1747.

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聚吡咯-碳载Pd催化剂的制备及对甲酸的电催化氧化

Preparation of Polypyrrole-Carbon Black Supported Pd Catalyst for Formic Acid Electrooxidation

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