Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7710432 | International Journal of Hydrogen Energy | 2016 | 9 Pages |
Abstract
A one-pot thermos-reduction strategy is developed to prepare ultrafine PtNi alloy nanoparticles (NPs), which are uniformly deposited onto reduced graphene oxides (RGOs) in the presence of polyvinylpyrrolidone (PVP). The size of PtNi NPs on RGOs can be tuned from 2.5 to 5.4Â nm, after Ni was alloyed with Pt by Pt/Ni atomic ratio increased from 2:1 to 5:1. The electrochemical investigation demonstrates that Ni modification can promote the electrocatalytic activity of Pt catalysts on oxidation of methanol with a mass current density up to 1065Â mAÂ mgâ1, which is 2.65 times that of Pt catalysts without Ni modification, and comparable to and even better than those of the Pt-based catalysts reported recently.
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Authors
Yanfei Hao, Xudan Wang, Yuanyuan Zheng, Jianfeng Shen, Junhua Yuan, Ai-jun Wang, Li Niu, Shengtang Huang,