INFLUENCE OF PHYSICOCHEMICAL PROPERTIES ON THE PERFORMANCE OF PT/C POROUS-ELECTRODES FOR OXYGEN REDUCTION IN PHOSPHORIC-ACID

被引：13

作者：

GIORDANO, N

PASSALACQUA, E

ANTONUCCI, PL

PINO, L

VIVALDI, M

PATTI, A

KINOSHITA, K

机构：

[1] UNIV REGGIO CALABRIA,FAC ENGN,I-89100 REGGIO CALABRIA,ITALY

[2] LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720

来源：

ELECTROCHIMICA ACTA | 1993年 / 38卷 / 07期

关键词：

PHOSPHORIC ACID FUEL CELLS; OXYGEN REDUCTION; OXYGEN GAIN; TAFEL SLOPE; ACTIVITY DECAY;

D O I：

10.1016/0013-4686(93)87009-3

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Oxygen reduction on Pt supported on carbon black in PTFE-bonded porous electrodes in 98% H3PO4 at 170-degrees-C was investigated. The influence of the Pt surface area and the volume of H3PO4 in the electrode structure (per cent acid occupation, PAO) on the performance of porous electrodes (ie current-potential behavior, potential at a constant current density of 200 mA cm-2, oxygen gain) were evaluated. The results clearly show that the Pt surface area has a major influence on the Tafel slope, electrode polarization, electrode potential decay at constant current density, and oxygen gain. On the other hand, these parameters do not show a clear trend with PAO.

引用

页码：913 / 918

页数：6

共 25 条

[1] MORPHOLOGICAL-CHANGES IN THE ELECTRODES OF PHOSPHORIC-ACID FUEL-CELLS OPERATING UNDER OPEN CIRCUIT VOLTAGE CONDITIONS [J].