Ethanol electrooxidation on novel carbon supported Pt/SnOx/C catalysts with varied Pt : Sn ratio

	Ethanol electrooxidation on novel carbon supported Pt/SnOx/C catalysts with varied Pt : Sn ratio
	Jiang, L.; Colmenares, L.; Jusys, Z.; Sun, G. Q.; Behm, R. J.
刊名	electrochimica acta
	2007-12-01
卷号	53 期号:2 页码:377-389
关键词	ethanol oxidation activity selectivity supported catalyst Pt/SnO2
英文摘要	novel carbon supported pt/snox/c catalysts with pt:sn atomic ratios of 5:5, 6:4, 7:3 and 8:2 were prepared by a modified polyol method and characterized with respect to their structural properties (x-ray diffraction (xrd) and transmission electron microscopy (tem)), chemical composition (xps), their electrochemical properties (base voltammetry, coad stripping) and their electrocatalytic activity and selectivity for ethanol oxidation (ethanol oxidation reaction (eor)). the data show that the pt/snox/c catalysts are composed of pt and tin oxide danoparticles with an average pt particle diameter of about 2 nm. the steady-state activity of the pt/snox/c catalysts towards the eor decreases with tin content at room temperature, but increases at 80 degrees c. on all pt/snox/c catalysts, acetic acid and acetaldehyde represent dominant products, co2 formation contributes 1-3% for both potentiostatic and potentiodynamic reaction conditions. with in creasing potential, the acetaldehyde yield decreases and the acetic acid yield increases. the apparent activation energies of the eor increase with tin content (19-29 kj mol(-1)), but are lower than on pt/c (32 kj mol(-1)). the somewhat better performance of the pt/snox/c catalysts compared to alloyed ptsnx/c catalysts is attributed to the presence of both sufficiently large pt ensembles for ethanol dehydrogenation and c-c bond splitting and of tin oxide for oh generation. fuel cell measurements performed for comparison largely confirm the results obtained in model studies. (c) 2007 elsevier ltd. all rights reserved.
WOS标题词	science & technology ; physical sciences
类目[WOS]	electrochemistry
研究领域[WOS]	electrochemistry
关键词[WOS]	electrochemical mass-spectrometry ; fuel-cell catalyst ; anode catalysts ; product yields ; part i ; oxidation ; electrocatalysts ; methanol ; electrode ; acid
收录类别	SCI ; ISTP
语种	英语
WOS记录号	WOS:000251480900018
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/140488]
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.Univ Ulm, Inst Catalysis & Surface Chem, D-89069 Ulm, Germany 2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Jiang, L.,Colmenares, L.,Jusys, Z.,et al. Ethanol electrooxidation on novel carbon supported Pt/SnOx/C catalysts with varied Pt : Sn ratio[J]. electrochimica acta,2007,53(2):377-389.
APA	Jiang, L.,Colmenares, L.,Jusys, Z.,Sun, G. Q.,&Behm, R. J..(2007).Ethanol electrooxidation on novel carbon supported Pt/SnOx/C catalysts with varied Pt : Sn ratio.electrochimica acta,53(2),377-389.
MLA	Jiang, L.,et al."Ethanol electrooxidation on novel carbon supported Pt/SnOx/C catalysts with varied Pt : Sn ratio".electrochimica acta 53.2(2007):377-389.