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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.
KeywordEthanol Oxidation Activity Selectivity Supported Catalyst Pt/sno2
Source PublicationELECTROCHIMICA ACTA
2007-12-01
DOI10.1016/j.electacta.2007.01.047
Volume53Issue:2Pages:377-389
Indexed BySCI ; ISTP
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectElectrochemistry
WOS Research AreaElectrochemistry
WOS KeywordELECTROCHEMICAL MASS-SPECTROMETRY ; FUEL-CELL CATALYST ; ANODE CATALYSTS ; PRODUCT YIELDS ; PART I ; OXIDATION ; ELECTROCATALYSTS ; METHANOL ; ELECTRODE ; ACID
AbstractNovel 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.
Language英语
WOS IDWOS:000251480900018
Citation statistics
Cited Times:159[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/140488
Collection中国科学院大连化学物理研究所
Affiliation1.Univ Ulm, Inst Catalysis & Surface Chem, D-89069 Ulm, Germany
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
Recommended Citation
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.
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