Pt-Se纳米空球修饰玻碳电极上甲酸的电催化氧化

doi:10.3866/PKU.WHXB20100835

Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (09): 2337-2342.doi: 10.3866/PKU.WHXB20100835

• ELECTROCHEMISTRY • Previous Articles Next Articles

Electrocatalytic Oxidation of Formic Acid on Pt-Se HollowNanosphere Modified Glassy Carbon Electrodes

YAN Liang-Liang¹, JIANG Qing-Ning², LIU De-Yu², ZHONG Yan¹, WEN Fei-Peng¹, DENG Xiao-Cong¹, ZHONG Qi-Ling¹, REN Bin², TIAN Zhong-Qun²

1. College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China;
2. State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China

Received:2010-03-11 Revised:2010-05-14 Published:2010-09-02
Contact: ZHONG Qi-Ling, REN Bin E-mail:zhqiling@163.com; bren@xmu.edu.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (20663002), Foundation of State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, China (200511).

Abstract

Abstract:

Platinum-selenium and platinum hollow nanospheres (denoted as (Pt-Se)_HN and Pt_HN, respectively) with different coverages of Se (θ_Se) (θ_Se=0.49, 0.39, 0.06, 0) were prepared using amorphous Se colloids as a sacrificial template. Sulfite was used to completely remove Se from the core-shell nanoparticles. The morphology and structure of the nanoparticles were characterized using various methods, which revealed a hollow structure with a very uniform size distribution and a porous structure on the shell. Assembly of Pt-Se hollownanospheres ((Pt-Se)_HN) on a glassy carbon (GC) electrode produced a (Pt-Se)_HN/GC electrode. The electrocatalytic activity of the electrode for the oxidation of formic acid was compared with the Pt_HN/GCand commercial Pt/C/GCelectrodes by cyclic voltammetry and chronoamperometry. The activity followed the order: (Pt-Se)_HN/GC > Pt_HN/GC >Pt/C/GC. The electrooxidation of formic acid on (Pt-Se)_HN/C, Pt_HN/C, and Pt/C catalysts follows different mechanisms: the former tends to directly oxidize formic acid to CO₂ via weakly adsorbed intermediates, and the latter two via both weakly and strongly adsorbed intermediates. (Pt-Se)_HN with a suitable seleniumcontent showed optimal electrocatalytic activity for the oxidation of formic acid.

Key words: Electrocatalysis, Pt-Se hollow nanosphere, (Pt-Se)HN/GC electrode, Formic acid, Oxidation

YAN Liang-Liang, JIANG Qing-Ning, LIU De-Yu, ZHONG Yan, WEN Fei-Peng, DENG Xiao-Cong, ZHONG Qi-Ling, REN Bin, TIAN Zhong-Qun. Electrocatalytic Oxidation of Formic Acid on Pt-Se HollowNanosphere Modified Glassy Carbon Electrodes[J].Acta Phys. -Chim. Sin., 2010, 26(09): 2337-2342.

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Electrocatalytic Oxidation of Formic Acid on Pt-Se HollowNanosphere Modified Glassy Carbon Electrodes

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