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A quantitative research on S- and SO2-poisoning Pt/Vulcan carbon fuel cell catalyst
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
2012-04-15
DOI10.1016/j.electacta.2012.01.105
67页:50-54
收录类别SCI
文章类型Article
类目[WOS]Electrochemistry
研究领域[WOS]Electrochemistry
关键词[WOS]SULFUR-DIOXIDE CONTAMINATION ; PEMFC PERFORMANCE ; ELECTROCHEMICAL-BEHAVIOR ; OXYGEN REDUCTION ; ACIDIC MEDIUM ; ELECTRODES ; OXIDATION ; RECOVERY ; AIR ; PLATINUM
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.
语种英语
WOS记录号WOS:000302841600008
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142932
专题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, 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
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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.
APA Xie, Feng.,Shao, Zhi-Gang.,Zhang, Geng.,Zhai, Junxiang.,Lu, Wangting.,...&Yi, Baolian.(2012).A quantitative research on S- and SO2-poisoning Pt/Vulcan carbon fuel cell catalyst.ELECTROCHIMICA ACTA,67,50-54.
MLA Xie, Feng,et al."A quantitative research on S- and SO2-poisoning Pt/Vulcan carbon fuel cell catalyst".ELECTROCHIMICA ACTA 67(2012):50-54.
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