A quantitative research on S- and SO2-poisoning Pt/Vulcan carbon fuel cell catalyst
A quantitative research on S- and SO2-poisoning Pt/Vulcan carbon fuel cell catalyst
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S-和SO2中毒Pt/Vulcan碳燃料电池催化剂的定量研究
DOI：
10.1016/j.electacta.2012.01.105
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发表时间：
2012-04
影响因子：
6.6
通讯作者：
Yi, Baolian
中科院分区：
文献类型：
--
作者：
Xie, Feng;Shao, Zhi-Gang;Zhang, Geng;Zhai, Junxiang;Lu, Wangting;Qin, Xiaoping;Lin, Wenfeng;Yi, Baolian
采用三电极法对燃料电池Pt/Vulcan炭（Pt/VC）催化剂的S和SO2中毒进行了定量研究。将Pt/VC电极浸泡在由0.2mM Na_2SO_3和0.5M H_2SO_4组成的含SO_2溶液中不同时间，并在0.05V（vs. RHE）的0.5M H_2SO_4溶液中保持，以获得零价硫（SO）中毒的电极。Pt的硫覆盖率由当硫从0.05V（vs. RHE）下的SO氧化为>1.1V（vs. RHE）下的硫酸盐时消耗的总电荷确定。当0.5<θH<1时，S_0的初始覆盖度（θS）与H的覆盖度（θH）之和近似等于1（θH+θS=1），这为计算Pt/VC上的硫吸附量提供了一种简便的方法。对于SO2中毒的Pt/VC，当0.45<θH<0.81时，催化剂的氧还原活性（ORR）随Pt纳米粒子上SO2吸附量的增加而线性下降。当吸附的SO_2还原为S_0时，Pt/VC的质量比活度大大恢复，面积比活度甚至高于未中毒的Pt/VC。
A quantitative research on S and SO2poisoning 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 0.2mM Na2SO3and 0.5M H2SO4for different periods of time, and held at 0.05V (vs. RHE) in 0.5M H2SO4solutions in order to gain zero-valence sulfur (S0) poisoned electrodes. The sulfur coverage of Pt was determined from the total charge consumed as the sulfur was oxidized from S0at 0.05V (vs. RHE) to sulfate at >1.1V (vs. RHE). The summation of initial coverage of S0(θS) and coverage of H (θH) are approximately equal to 1 (θH+θS=1) when 0.5<θH<1, which gives an easy way to figure out the quantity of sulfur adsorbed on Pt/VC. As to SO2poisoned Pt/VC, the catalytic activity of oxygen reduction reaction (ORR) decreases linearly with the amount of SO2adsorbed on the Pt nanoparticles when 0.45<θH<0.81. When the adsorbed SO2was reduced to S0, the mass activity was greatly recovered, and the area specific activity was even higher than the unpoisoned Pt/VC.
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影响因子：
6.6
作者：
R. Spotnitz;J. Colucci;S. Langer
通讯作者：
R. Spotnitz;J. Colucci;S. Langer
影响因子：
--
作者：
Y. Garsany;Benjamin D. Gould;O. Baturina;K. Swider-Lyons
通讯作者：
Y. Garsany;Benjamin D. Gould;O. Baturina;K. Swider-Lyons
影响因子：
3.9
作者：
Benjamin D. Gould;G. Bender;K. Bethune;S. Dorn;O. Baturina;R. Rocheleau;K. Swider-Lyons
通讯作者：
Benjamin D. Gould;G. Bender;K. Bethune;S. Dorn;O. Baturina;R. Rocheleau;K. Swider-Lyons
DOI：
10.1149/1.2981945
发表时间：
2008-08
期刊：
Langmuir : the ACS journal of surfaces and colloids
影响因子：
--
作者：
S. Tsushima;H. Morioka;K. Kaneko;S. Hirai
通讯作者：
S. Tsushima;H. Morioka;K. Kaneko;S. Hirai
影响因子：
3.9
作者：
Y. Garsany;O. Baturina;K. Swider-Lyons
通讯作者：
Y. Garsany;O. Baturina;K. Swider-Lyons