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No Access Submitted: 10 September 2012 Accepted: 06 February 2013 Published Online: 27 March 2013

  • N-doped graphene-supported Pt and Pt-Ru nanoparticles with high electrocatalytic activity for methanol oxidation

Journal of Renewable and Sustainable Energy 5, 021405 (2013); https://doi.org/10.1063/1.4798433
Hongzhou Dong (董红周)1, Jincheng Bai (白金城)1, Qianqian Zhu (朱倩倩)1, Jianhua Yu (于建华)1, Liyan Yu (于立岩)1, and Lifeng Dong (董立峰)1,2, a)
more...View Affiliations
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  • Hongzhou Dong (董红周)
  • Jincheng Bai (白金城)
  • Qianqian Zhu (朱倩倩)
  • Jianhua Yu (于建华)
  • Liyan Yu (于立岩)
  • Lifeng Dong (董立峰)
ABSTRACT
In this work, Pt and Pt-Ru nanoparticles were synthesized on both graphene and nitrogen (N)-doped graphene sheets, and their effects on electrocatalytic activity for methanol oxidation were investigated using cyclic voltammetry and electrochemical impedance spectroscopy. Experimental results show that, in comparison to pure graphene as catalyst support, N-doped graphene-supported Pt and Pt-Ru nanoparticles demonstrate enhanced characteristics for methanol electro-oxidations with regard to oxidation potential, forward peak oxidation current density, and charge transfer resistance. For instance, the forward peak current densities of graphene-supported Pt and Pt-Ru nanoparticles were 9.5 mA/cm2 and 7.3 mA/cm2, respectively; however, the current densities of N-doped graphene-supported Pt and Pt-Ru nanoparticles were 19.9 mA/cm2 and 16.2 mA/cm2, respectively. The doping of nitrogen into graphene can effectively improve the currently density by twice. Our findings suggest the use of N-doped graphene sheets as promising catalyst supports for direct methanol fuel cells.

ACKNOWLEDGMENTS

This work was partially supported by the National Natural Science Foundation of China (51172113), the Shandong Natural Science Foundation for Distinguished Young Scholars (JQ201118), the Taishan Overseas Scholar program from the Shandong Province Government, PR China, the Key Project of Chinese Ministry of Education (No. 211095), the Qingdao Municipal Science and Technology Commission (12-1-4-136-hz), and a Sabbatical Leave Award from Missouri State University.

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