Pt based anode catalysts for direct ethanol fuel cells

	Pt based anode catalysts for direct ethanol fuel cells
	Zhou, WJ ; Zhou, ZH ; Song, SQ ; Li, WZ ; Sun, GQ ; Tsiakaras, P ; Xin, Q
刊名	applied catalysis b-environmental
	2003-11-10
卷号	46 期号:2 页码:273-285
关键词	direct ethanol fuel cells PtRu PtSn Nafion (R) proton exchange membrane anode catalyst
产权排序	1;1
英文摘要	in the present work several pt-based anode catalysts supported on carbon xc-72r were prepared with a novel method and characterized by means of xrd, tem and xps analysis. it was found that all these catalysts are consisted of uniform nanosized particles with sharp distribution and pt lattice parameter decreases with the addition of ru or pd and increases with the addition of sn or w. cyclic voltammetry (cv) measurements and single direct ethanol fuel cell (defc) tests jointly showed that the presence of sn, ru and w enhances the activity of pt towards ethanol electro-oxidation in the following order: pt1sn1/c > pt1ru1/c > pt1w1/c > pt1pd1/c > pt/c. moreover, pt1ru1/c further modified by w and mo showed improved ethanol electro-oxidation activity, but its defc performance was found to be inferior to that measured for pt1sn1/c. under this respect, several ptsn/c catalysts with different pt/sn atomic ratio were also identically prepared and characterized and their direct ethanol fuel cell performances were evaluated. it was found that the single direct ethanol fuel cell having pt1sn1/c or pt3sn2/c or pt2sn1/c as anode catalyst showed better performances than those with pt3sn1/c or pt4sn1/c. it was also found that the latter two cells exhibited higher performances than the single cell using pt1ru1/c, which is exclusively used in pemfc as anode catalyst for both methanol electro-oxidation and co-tolerance. this distinct difference in defc performance between the catalysts examined here would be attributed to the so-called bifunctional mechanism and to the electronic interaction between pt and additives. it is thought that an amount of -ohads, an amount of surface pt active sites and the conductivity effect of ptsn/c catalysts would determine the activity of ptsn/c with different pt/sn ratios. at lower temperature values or at low current density regions where the electro-oxidation of ethanol is considered not so fast and its chemisorption is not the rate-determining step, the pt3sn2/c seems to be more suitable for the direct ethanol fuel cell. at 75 degreesc, the single ethanol fuel cell with pt3sn2/c as anode catalyst showed a comparable performance to that with pt2sn1/c, but at higher temperature of 90 degreesc, the latter presented much better performance. it is thought from a practical point of view that pt2sn1/c, supplying sufficient -ohads and having adequate active pt sites and acceptable ohmic effect, could be the appropriate anode catalyst for defc. (c) 2003 elsevier b.v. all rights reserved.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, physical ; engineering, environmental ; engineering, chemical
研究领域[WOS]	chemistry ; engineering
关键词[WOS]	electrocatalytic oxidation ; methanol electrooxidation ; chemical-composition ; platinum-electrodes ; mass-spectrometry ; pt-ru ; sn ; carbon ; performance ; ternary
收录类别	SCI
原文出处	true
语种	英语
WOS记录号	WOS:000186259900006
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/82041]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Direct Alcohol Fuel Cell Lab, Dalian 116023, Peoples R China 2.Univ Thessalia, Dept Mech & Ind Engn, GR-38334 Volos 7, Greece 3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Zhou, WJ,Zhou, ZH,Song, SQ,et al. Pt based anode catalysts for direct ethanol fuel cells[J]. applied catalysis b-environmental,2003,46(2):273-285.
APA	Zhou, WJ.,Zhou, ZH.,Song, SQ.,Li, WZ.,Sun, GQ.,...&Xin, Q.(2003).Pt based anode catalysts for direct ethanol fuel cells.applied catalysis b-environmental,46(2),273-285.
MLA	Zhou, WJ,et al."Pt based anode catalysts for direct ethanol fuel cells".applied catalysis b-environmental 46.2(2003):273-285.