Citation:
Haiqiang Zhao, Weihong Qi, Xinfeng Zhou, Haofei Wu, Yejun Li. Composition-controlled synthesis of platinum and palladium nanoalloys as highly active electrocatalysts for methanol oxidation[J]. Chinese Journal of Catalysis,
;2018, 39(2): 342-349.
doi:
10.1016/S1872-2067(18)63020-7
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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.
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