Phosphate-decorated Pt Nanoparticles as Methanol-tolerant Oxygen Reduction Electrocatalyst for Direct Methanol Fuel Cells

被引：10

作者：

Choi, Jung-goo ^{[1
,2
]}

Ham, Kahyun ^{[1
,2
,3
]}

Bong, Sungyool ^{[1
,2
,3
]}

Lee, Jaeyoung ^{[1
,2
,3
]}

机构：

[1] Gwangju Inst Sci & Technol GIST, Sch Earth Sci & Environm Engn, 123 Cheomdangwagi Ro, Gwangju 61005, South Korea

[2] GIST, Int Future Res Ctr Chem Energy Storage & Convers, 123 Cheomdangwagi Ro, Gwangju 61005, South Korea

[3] GIST, Ertl Ctr Electrochem & Catalysis, 123 Cheomdangwagi Ro, Gwangju 61005, South Korea

来源：

JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY | 2022年 / 13卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

Direct Methanol Fuel Cell; Oxygen Reduction Reaction; Methanol Tolerance; Platinum; Anion Decoration; CARBON; PLATINUM; CATALYSTS; CATHODE; PERFORMANCE; CROSSOVER; KINETICS; SYSTEM; DMFC;

D O I：

10.33961/jecst.2022.00115

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In a direct methanol fuel cell system (DMFC), one of the drawbacks is methanol crossover. Methanol from the anode passes through the membrane and enters the cathode, causing mixed potential in the cell. Only Pt-based catalysts are capable of operating as cathode for oxygen reduction reaction (ORR) in a harsh acidic condition of DMFC. However, it causes mixed potential due to high activity toward methanol oxidation reaction of Pt. To overcome this situation, developing Pt-based catalyst that has methanol tolerance is significant, by controlling reactant adsorption or reaction kinetics. Pt/C decorated with phosphate ion was prepared by modified polyol method as cathode catalyst in DMFC. Phosphate ions, bonded to the carbon of Pt/C, surround free Pt surface and block only methanol adsorption on Pt, not oxygen. It leads to the suppression of methanol oxidation in an oxygen atmosphere, resulting in high DMFC performance compared to pristine Pt/C.

引用

页码：354 / 361

页数：8

共 45 条

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