Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (2): 342-349.DOI: 10.1016/S1872-2067(18)63020-7

• Articles • Previous Articles    

Composition-controlled synthesis of platinum and palladium nanoalloys as highly active electrocatalysts for methanol oxidation

Haiqiang Zhaoa, Weihong Qia,b, Xinfeng Zhoua, Haofei Wua, Yejun Lic   

  1. a School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China;
    b Key Laboratory of Non-ferrous Materials Science and Engineering, Ministry of Education, Central South University, Changsha 410083, Hunan, China;
    c Hunan Key Laboratory of Super Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, Hunan, China
  • Received:2017-09-20 Revised:2017-12-27 Online:2018-02-18 Published:2018-02-10
  • Contact: 10.1016/S1872-2067(18)63020-7
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21373272).

Abstract:

Platinum and palladium (PtPd) alloy nanoparticles (NPs) are excellent catalysts for direct methanol fuel cells. In this study, we developed PtPd alloy NPs through the co-reduction of K2PtCl4 and Na2PdCl4 in a polyol synthesis environment. During the reaction, the feed molar ratio of the two precursors was carried over to the final products, which have a narrow size distribution with a mean size of approximately 4 nm. The catalytic activity for methanol oxidation reactions possible depends closely on the composition of as-prepared PtPd alloy NPs, and the NPs with a Pt atomic percentage of approximately 75% result in higher activity and stability with a mass specific activity that is 7 times greater than that of commercial Pt/C catalysts. The results indicate that through composition control, PtPd alloy NPs can improve the effectiveness of catalytic performance.

Key words: Platinum and palladium alloy nanoparticles, Composition and size control, Methanol oxidation