催化学报 ›› 2011, Vol. 32 ›› Issue (9): 1519-1524.DOI: 10.3724/SP.J.1088.2011.10439

• 研究论文 • 上一篇    下一篇

Pt 修饰的 Ni/C 催化剂电催化氧化乙醇性能

王星砾, 王辉, 雷自强, 张哲, 王荣方*   

  1. 西北师范大学化学化工学院, 生态环境相关高分子材料教育部重点实验室, 甘肃省高分子材料重点实验室, 甘肃兰州 730070
  • 收稿日期:2011-05-31 修回日期:2011-07-07 出版日期:2011-09-09 发布日期:2015-01-24

The Performance of Carbon-Supported Platinum-Decorated Nickel Electrocatalyst for Ethanol Oxidation

WANG Xingli, WANG Hui, LEI Ziqiang, ZHANG Zhe, WANG Rongfang*   

  1. Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, Gansu, China
  • Received:2011-05-31 Revised:2011-07-07 Online:2011-09-09 Published:2015-01-24

摘要: 采用两步还原法制备了 Pt 修饰的 Ni/C 催化剂 (Ni@Pt/C), 并应用 X 射线衍射和透射电子显微镜对催化剂进行了表征. 结果表明, 载体上催化剂粒子呈两相复合结构, 具有较好的分散性, 平均粒径为 4.4 nm. 电化学测试表明, Ni@Pt/C 催化氧化乙醇的活性电流高达 0.37 A/mg, 是商业 Pt/C 催化剂的 2.33 倍, PtNi/C 合金催化剂的 1.78 倍, 显示出良好的催化性能.

关键词: 铂, 镍, 修饰型催化剂, 乙醇, 氧化, 燃料电池

Abstract:  A carbon-supported platinum-decorated nickel electrocatalyst (Ni@Pt/C) was prepared by two-step reaction and characterized by X-ray diffraction, transmission electron microscopy, and cyclic voltammetry. Based on the Pt mass, the Ni@Pt/C catalyst exhibits higher activity for ethanol oxidation than the commercial Pt/C catalyst and alloy PtNi/C catalyst. The peak current of Ni@Pt/C reaches 0.37 A/mg, which is 2.33 and 1.78 times as large as those of Pt/C and PtNi/C, respectively. This can be attributed to the modified electronic structure of the Pt surface layer in the Ni@Pt/C catalyst.

Key words: platinum, nickel, modified electrocatalyst, ethanol, oxidation, fuel cell