Size-controllable synthesis of ultrafine PtNi nanoparticles uniformly deposited on reduced graphene oxide as advanced anode catalysts for methanol oxidation. (15th June 2016)

• Record Type: Journal Article
• Authors: Hao, Yanfei; Wang, Xudan; Zheng, Yuanyuan; Shen, Jianfeng; Yuan, Junhua; Wang, Ai-jun; Niu, Li; Huang, Shengtang
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 22(2016)
• Page Start: 9303
• Page End: 9311
• Publication Date: 2016-06-15
• Subjects: Pt catalysts -- Graphene -- Direct methanol fuel cells -- Electrocatalysis; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.04.093
• Languages: English
• ISSNs: 0360-3199

Abstract

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 5.4 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 1065 mA mg −1, 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. Highlights: Ultrafine PtNi alloy nanoparticles were uniformly deposited onto graphenes. Their size can be controlled by changing Pt/Ni atomic ratio. Ni modification can promote methanol oxidation at Pt surface significantly.