Fabrication of sponge-like nanoporous platinum electrocatalysts for oxygen reduction through alloying and dealloying processes

Jiang Ming; Lin Xiangqin; Zhang Zhixiang

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Fabrication of sponge-like nanoporous platinum electrocatalysts for oxygen reduction through alloying and dealloying processes

Jiang Ming,Lin Xiangqin * #,Zhang Zhixiang

Department of Chemistry,University of Science and Technology of China

*Correspondence author

#Submitted by

Subject:

Funding: 教育部博士点基金,国家自然科学基金（No.No.20040358021,No.20575062）

Opened online:13 March 2008

Accepted by: none

Citation: Jiang Ming,Lin Xiangqin,Zhang Zhixiang.Fabrication of sponge-like nanoporous platinum electrocatalysts for oxygen reduction through alloying and dealloying processes[OL]. [13 March 2008] http://en.paper.edu.cn/en_releasepaper/content/19286

A novel sponge-like spherical nanoporous platinum (NPs-Pt) was generated through a facile way of electrodeposition followed by chemical etching at room temperature. First, a Pt-Cu alloy nanoparticles was electrodeposited on a glassy carbon electrode (GCE) using cyclic voltammetry (CV), and then Cu was etched off from the alloy in HNO3. FE-SEM, XPS, EIS and CV were used for characterization. Optimal conditions for the preparation were investigated. The NPs-Pt modified electrode (NPs-Pt/GCE) exhibited excellent electrocatalytic activity toward the oxygen reduction reaction (ORR). Moreover, the peak current of ORR at NPs-Pt/GCE was 4 times higher than that correspondingly prepared Pt nanoparticles modified electrode, showing much higher current sensitivity. The preparation method for the sponge-like nanoporous structure and the NPs-Pt modified electrode can be expected to have promising applications in the field of fuel cells and biosensors, etc.

Keywords:Nanoporous Pt; dealloying; Pt-Cu alloy; oxygen reduction reaction

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