The effect of metal solution contaminants on the platinum electro-catalyst during methanol oxidation and oxygen reduction reactions

被引：1
|
作者：
Jalilpour, Soghra [1 ,2 ]
Bock, Christina [2 ]
MacDougall, Barry R. [1 ,2 ]
Hall, David S. [1 ,2 ,3 ]
机构：
[1] Univ Ottawa, Dept Chem, 10 Marie Curie, Ottawa, ON K1N 6N5, Canada
[2] Natl Res Council Canada, M-12,1200 Montreal Rd, Ottawa, ON K1A 0R6, Canada
[3] Univ Cambridge, Dept Chem, Lensfield Rd, Cambridge CB2 1EW, England
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2020年 / 862卷
关键词：
Fuel cells; ORR; MOR; Cobalt/nickel/zinc UPD; Cation/anion impurity; POTENTIAL FUEL IMPURITY; UNDERPOTENTIAL DEPOSITION; POLYCRYSTALLINE PLATINUM; DEGRADATION MECHANISMS; ALLOY CATALYSTS; CELL DURABILITY; CATIONS; PERFORMANCE; CATHODE; PT(111);
D O I：
10.1016/j.jelechem.2020.113997
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Understanding the effect of metal solution contaminants on the methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR) activities of directmethanol fuel cells (DMFCs) is critical in the enhancement of this technology. In this study, the effect of various concentrations of metal salt solutions (i.e., Co, Ni and Zn with sulfate and nitrate as counter-anions) on polycrystalline Pt and PtxRuy electro-catalytic activities during MOR and ORR are systematically investigated. The results show a decrease in MOR and ORR activities as the concentration of metal salt solutions increased. The influence of counter-anions (i.e., NO3- and SO42-) adsorption on the Pt electro-catalyst activity was further investigated. The results showed that a combined effect of adsorbed counter-anions as well as hydrated metal cations may be responsible for the decrease in the electro-catalytic activity of Pt during the MOR and ORR. (c) 2020 Elsevier B.V. All rights reserved.
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页数：9
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