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题名: A quantitative research on S- and SO2-poisoning Pt/Vulcan carbon fuel cell catalyst
作者: Xie, Feng1, 2;  Shao, Zhi-Gang1;  Zhang, Geng1, 2;  Zhai, Junxiang1, 2;  Lu, Wangting1, 2;  Qin, Xiaoping1;  Lin, Wenfeng3;  Yi, Baolian1
关键词: PEMFC ;  Electrocatalyst ;  Sulfur ;  ORR
刊名: ELECTROCHIMICA ACTA
发表日期: 2012-04-15
DOI: 10.1016/j.electacta.2012.01.105
卷: 67, 页:50-54
收录类别: SCI
文章类型: Article
类目[WOS]: Electrochemistry
研究领域[WOS]: Electrochemistry
英文摘要: A quantitative research on S and SO2 poisoning Pt/Vulcan carbon (Pt/VC) catalysts for fuel cells was conducted by the three-electrode method. Pt/VC electrodes were contaminated by submersion in a SO2-containing solution made up of 0.2 mM Na2SO3 and 0.5 M H2SO4 for different periods of time, and held at 0.05 V (vs. RHE) in 0.5 M H2SO4 solutions in order to gain zero-valence sulfur (S-0) poisoned electrodes. The sulfur coverage of Pt was determined from the total charge consumed as the sulfur was oxidized from S-0 at 0.05 V (vs. RHE) to sulfate at >1.1 V (vs. RHE). The summation of initial coverage of S-0 (theta(S)) and coverage of H (theta(H)) are approximately equal to 1 (theta(H) + theta(S) = 1) when 0.5 < theta(H) < 1, which gives an easy way to figure out the quantity of sulfur adsorbed on Pt/VC. As to SO2 poisoned Pt/VC, the catalytic activity of oxygen reduction reaction (ORR) decreases linearly with the amount of SO2 adsorbed on the Pt nanoparticles when 0.45 < theta(H) < 0.81. When the adsorbed SO2 was reduced to S-0 the mass activity was greatly recovered, and the area specific activity was even higher than the unpoisoned Pt/VC. (C) 2012 Elsevier Ltd. All rights reserved.
关键词[WOS]: SULFUR-DIOXIDE CONTAMINATION ;  PEMFC PERFORMANCE ;  ELECTROCHEMICAL-BEHAVIOR ;  OXYGEN REDUCTION ;  ACIDIC MEDIUM ;  ELECTRODES ;  OXIDATION ;  RECOVERY ;  AIR ;  PLATINUM
语种: 英语
WOS记录号: WOS:000302841600008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142932
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Fuel Cell Syst & Engn Lab, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Queens Univ Belfast, Sch Chem & Chem Engn, Belfast BT9 5AG, Antrim, North Ireland

Recommended Citation:
Xie, Feng,Shao, Zhi-Gang,Zhang, Geng,et al. A quantitative research on S- and SO2-poisoning Pt/Vulcan carbon fuel cell catalyst[J]. ELECTROCHIMICA ACTA,2012,67:50-54.
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