A MICROELECTRODE STUDY OF OXYGEN REDUCTION AT THE PLATINUM/RECAST-NAFION FILM INTERFACE

被引：110

作者：

URIBE, FA

SPRINGER, TE

GOTTESFELD, S

机构：

[1] Electronics Research Group, Los Alamos National Laboratory, Los Alamos

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1992年 / 139卷 / 03期

关键词：

D O I：

10.1149/1.2069299

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We describe a study of the oxygen reduction kinetics at the Pt/recast Nafion(R) interface employing a minicell based on a filmed microelectrode. The experimental conditions are identical to those in polymer-electrolyte fuel cells in that the recast ionomer electrolyte is exposed only to water vapor. We find that the interfacial rate of oxygen reduction near 0.9 V is similar for the Pt/recast ionomer interface and for Pt immersed in dilute aqueous acid solutions. A significant loss of oxygen reduction activity occurs when the recast ionomer electrolyte loses water. We discuss a possible evaluation of catalyst utilization in polymer electrolyte fuel cells.

引用

收藏

页码：765 / 773

页数：9

相关论文

共 27 条

[11] GAS PERMEATION IN SPE METHOD .1. OXYGEN PERMEATION THROUGH NAFION AND NEOSEPTA [J].

OGUMI, Z ;

TAKEHARA, Z ;

YOSHIZAWA, S .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1984, 131 (04) :769-773

[12] GAS PERMEATION IN SPE METHOD .2. OXYGEN AND HYDROGEN PERMEATION THROUGH NAFION [J].

OGUMI, Z ;

KUROE, T ;

TAKEHARA, Z .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1985, 132 (11) :2601-2605

[13] KINETICS OF FUEL-CELL REACTIONS AT THE PLATINUM SOLID POLYMER ELECTROLYTE INTERFACE [J].

PAIK, W ;

SPRINGER, TE ;

SRINIVASAN, S .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1989, 136 (03) :644-649

[14] INVESTIGATIONS OF THE O-2 REDUCTION REACTION AT THE PLATINUM NAFION INTERFACE USING A SOLID-STATE ELECTROCHEMICAL-CELL [J].

PARTHASARATHY, A ;

MARTIN, CR ;

SRINIVASAN, S .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1991, 138 (04) :916-921

[15]

Raistrick I.D., 1989, US patent, Patent No. [4,876,115, 4876115]

[16]

RAISTRICK ID, 1986, ELECTROCHEMICAL SOC, P172

[17] OXYGEN REDUCTION ON PT IN AQUEOUS K2CO3 AND KOH [J].

STRIEBEL, KA ;

MCLARNON, FR ;

CAIRNS, EJ .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1990, 137 (11) :3351-3359

[18] EFFECT OF CURING-HUMIDITY ON RECAST-NAFION FILMS [J].

STRIEBEL, KA ;

SCHERER, GG ;

HAAS, O .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1991, 304 (1-2) :289-296

[19] LOCALIZATION OF PLATINUM IN LOW CATALYST LOADING ELECTRODES TO ATTAIN HIGH-POWER DENSITIES IN SPE FUEL-CELLS [J].

TICIANELLI, EA ;

DEROUIN, CR ;

SRINIVASAN, S .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1988, 251 (02) :275-295

[20] METHODS TO ADVANCE TECHNOLOGY OF PROTON-EXCHANGE MEMBRANE FUEL-CELLS [J].

TICIANELLI, EA ;

DEROUIN, CR ;

REDONDO, A ;

SRINIVASAN, S .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1988, 135 (09) :2209-2214