Citation: 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 Physico-Chimica Sinica, ;2010, 26(09): 2337-2342. doi: 10.3866/PKU.WHXB20100835 shu

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

1.
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 Date: 11 March 2010
Available Online: 30 June 2010
Fund Project: 国家自然科学基金(20663002) (20663002)厦门大学固体表面物理化学国家重点实验室基金(200511)资助项目 (200511)

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