自组装纳米金膜上铂微/纳结构电催化剂的制备及性能

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (1): 157.

自组装纳米金膜上铂微/纳结构电催化剂的制备及性能

张玉敏, 刘海燕, 宋文波

吉林大学化学学院, 长春 130012

收稿日期:2009-01-28 出版日期:2010-01-10 发布日期:2010-01-10
通讯作者: 宋文波, 女, 博士, 教授, 博士生导师, 主要从事电化学研究. E-mail: wbsong@jlu.edu.cn
基金资助:
国家自然科学基金(批准号: 20543003)和教育部海外归国人员科学研究基金资助.

Preparation and Investigations on Platinum Catalysts Supported on Self-assembled Films of Gold Nanoclusters

ZHANG Yu-Min, LIU Hai-Yan, SONG Wen-Bo*

College of Chemistry, Jilin University, Changchun 130012, China

Received:2009-01-28 Online:2010-01-10 Published:2010-01-10
Contact: SONG Wen-Bo. E-mail: wbsong@jlu.edu.cn
Supported by:
国家自然科学基金(批准号: 20543003)和教育部海外归国人员科学研究基金资助.

摘要/Abstract

摘要：

基于纳米金(AuNP)表面基团的静电自组装作用制备了多层有序的纳米金超薄膜. 研究了自组装纳米金超薄膜上铂微/纳结构催化剂(Pt/AuNP)的制备过程. 考察了沉积电位和沉积时间对甲酸电氧化活性的影响, 确定了最佳沉积电位为0 V, 最佳沉积时间为600 s. 同时对比考察了Pt/AuNP/PE/GCE, AuNP/PE/GCE和纯Pt电极在0.1 mol/L H2SO4介质中对甲酸电氧化活性以及载体对沉积物形态和甲酸氧化活性的影响. 研究结果表明, 纳米金组装体对铂的电沉积有明显的促进作用; Pt/AuNP/PE/GCE对甲酸的电氧化有很好的电催化性能.

关键词: 自组装薄膜; 金纳米团簇; 电沉积; 金属铂; 催化

Abstract:

Special attention was focused Pt-based and Pd-based metallic catalysts because of their broad industrial applications such as fuel cells, they had themselves merit. However, the high cost of platinum catalysts, slow reaction kinetics, poor selectivity, and catalyst poisoning have so far precluded the widespread use of fuel cells. Pt-based bimetallic catalysts may enhance catalytic activity, as compared to monometallic catalysts. This work demonstrated the use of self-assembled gold nanoclusters films for loading platinum catalysts. The self-assembled gold nanoclusters films were prepared based on the electrostatic interactions between the terminated cationic groups attached on the gold nanoclusters surfaces and the negatively charged polyelectrolyte binding layer and used to confine the growth of platinum metal catalyst by electrodeposition. The result revealed that the electrodeposited Pt was greatly accelerated by the underlying self-assembled gold nanoclusters films, and the activity towards oxidation of formic acid was dramatically increased compared with those of Pt electrodeposited on the surfaces of bare as well as the electrode covered with polymer binding layers. Present study provides a simply controlled test-bed for fundamental study on using self-assembled gold nanoclusters films as a support for catalysis.

Key words: Self-assembled film; Au nanocluster; Electrodeposition; Pt metal; Catalysis

TrendMD:

张玉敏, 刘海燕, 宋文波. 自组装纳米金膜上铂微/纳结构电催化剂的制备及性能. 高等学校化学学报, 2010, 31(1): 157.

ZHANG Yu-Min, LIU Hai-Yan, SONG Wen-Bo*. Preparation and Investigations on Platinum Catalysts Supported on Self-assembled Films of Gold Nanoclusters. Chem. J. Chinese Universities, 2010, 31(1): 157.

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