Reconstructed PtFe Alloy Nanoparticles with Bulk-Surface Differential Structure for Methanol Oxidation

	Reconstructed PtFe Alloy Nanoparticles with Bulk-Surface Differential Structure for Methanol Oxidation
	Lv, Qing ; Xiao, Yao ; Yin, Min ; Ge,Junjie ; Xing,Wei ; Liu Changpeng
刊名	electrochimica acta
	2014
卷号	139 期号:10 页码:61-68
关键词	ELECTROCATALYTIC OXIDATION ANODE CATALYST FUEL-CELLS ELECTROOXIDATION RU REDUCTION TOLERANCE COMPOSITE PLATINUM PTRU/C
通讯作者	ge,jj
英文摘要	the high cost of the catalyst material is a large obstacle for the commercialization of direct methanol fuel cells. in present work, the non-noble metal fe was added to the conventional pt/c catalyst in order to lowering the catalyst cost without sacrificing the catalytic performance. a chemically dealloying procedure was adopted to leach out the surface iron atoms and thereby increasing the stability of the catalyst. through these procedures, the ptfe bulk-surface differential nano-catalyst was obtained. the shift in diffraction angles according to xrd spectra confirms the formation of the alloy structure between pt and fe. tem results indicate that the chemically dealloyed ptfe/c nanoparticles are uniformly-dispersed with optimized average size. the ptfe bulk-surface differential structure is inferred from xps as no surface fe atoms are detected in spite of the change in pt electronic structure. the existence of fe atoms inside the nanoparticles is further confirmed by the icp characterization. electrochemical characterizations show that the catalytic activity is increased to 2.8 times, compared to the pt/c catalyst, which can be ascribed to the electronic effect of fe. a further evidence for the electronic effect comes from the co stripping spectroscopy, in which the onset potential for co oxidation shifts dramatically toward the negative potential side compared with pt/c. owing to the bulk-surface differential structure, the chemically dealloyed ptfe/c catalysts exhibits nearly the same stability compared to that of the pt/c catalyst. (c) 2014 elsevier ltd. all rights reserved.
收录类别	SCI
语种	英语
WOS记录号	WOS:000342275200010
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/56254]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Lv, Qing,Xiao, Yao,Yin, Min,et al. Reconstructed PtFe Alloy Nanoparticles with Bulk-Surface Differential Structure for Methanol Oxidation[J]. electrochimica acta,2014,139(10):61-68.
APA	Lv, Qing,Xiao, Yao,Yin, Min,Ge,Junjie,Xing,Wei,&Liu Changpeng.(2014).Reconstructed PtFe Alloy Nanoparticles with Bulk-Surface Differential Structure for Methanol Oxidation.electrochimica acta,139(10),61-68.
MLA	Lv, Qing,et al."Reconstructed PtFe Alloy Nanoparticles with Bulk-Surface Differential Structure for Methanol Oxidation".electrochimica acta 139.10(2014):61-68.