Low platinum loading PtNPs/graphene composite catalyst with high electrocatalytic activity for dye-sensitized solar cells

doi:10.1088/1674-1056/21/11/118101

Abstract Platinum nanoparticles (PtNPs)/graphene composite materials are synthesized by a controlled chemical reduction of H₂PtCl₆ on graphene sheets. The electrocatalytic activity of PtNPs/graphene composite counter electrode for dye-sensitized solar cell (DSSC) is investigated. The results demonstrate that PtNPs/graphene composite has high electrocatalytic activity for dye-sensitized solar cell. The cell employing PtNPs (1.6 wt%)/graphene counter electrode reaches an conversion efficiency (η) of 3.89% upon the excitation of 100 mW/cm² AM 1.5 white light, which is comparable to that of the cell with Pt-film counter electrode (η =3.76%). It suggests that one can use only 14% Pt content of conventional Pt-film counter electrode to obtain a comparable conversion efficiency. So it is promising to obtain high performance DSSC by using PtNPs/graphene composite with very low Pt content as counter electrode due to its simplicity, low cost, and large scalability.

Keywords: grapheme Pt nanoparticles counter electrode dye-sensitized solar cells

Received: 15 March 2012
Revised: 01 May 2012
Accepted manuscript online:

PACS:	81.05.ue	(Graphene)
	82.65.+r	(Surface and interface chemistry; heterogeneous catalysis at surfaces)
	84.60.Jt	(Photoelectric conversion)

Fund: Project supported by the Program for New Century Excellent Talents in University, China (Grant No. NCET-10-0291), the Fundamental Research Funds for the Central Universities, China (Grant Nos. ZYGX2009X005 and ZYGX2010J031), the Startup Research Project of University of Electronic Science and Technology of China (Grant No. Y02002010301041), and the National Natural Science Foundation of China (Grant Nos. 50832007, 11074285, and 51202022).

Corresponding Authors: Li Ping-Jian, Chen Yuan-Fu
E-mail: lipingjian@uestc.edu.cn; yfchen@uestc.edu.cn

Cite this article:

Li Ping-Jian (李萍剑), Chen Kai (程凯), Chen Yuan-Fu (陈远富), Wang Ze-Gao (王泽高), Hao Xin (郝昕), Liu Jing-Bo (刘竞博), He Jia-Rui (贺加瑞), Zhang Wan-Li (张万里 ) Low platinum loading PtNPs/graphene composite catalyst with high electrocatalytic activity for dye-sensitized solar cells 2012 Chin. Phys. B 21 118101

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Low platinum loading PtNPs/graphene composite catalyst with high electrocatalytic activity for dye-sensitized solar cells

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