2-PERCENT PLATINUM-H2WO4 BASED ELECTROCATALYSTS FOR PHOSPHORIC-ACID FUEL-CELL CATHODE

被引：20

作者：

SAVADOGO, O

ESSALIK, A

机构：

[1] Département de Métallurgie et de Génie des Matériaux, École Polytechnique, Montréal, Québec

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1994年 / 141卷 / 08期

关键词：

D O I：

10.1149/1.2055106

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A Pt-H2WO4 based electrocatalyst has been fabricated by an inexpensive chemical route for use as an oxygen cathode in 99% phosphoric acid at 180-degrees-C. The effect of %Pt (w/w) and %H2WO4 (w/w) on the Pt-H2WO4 electrode performance was studied. The electrocatalytic properties for the oxygen reduction reaction, e.g., exchange current density, mass activity, and specific activity of a 2% Pt-H2WO4 based electrode was several times higher than those of 10% Pt. The performance of the 2% Pt-1%H2WO4 was not due to an increase of its electrochemically active surface area. This may be due to electronic interaction and synergetic effects between electrocatalyst and support and its chemical composition.

引用

收藏

页码：L92 / L94

页数：3

相关论文

共 15 条

[1] THE IDENTICAL DIFFUSION COEFFICIENTS OF ISOSTRUCTURAL HETEROPOLY ANIONS - THE COMPLETE INDEPENDENCE OF D FROM IONIC WEIGHT [J].

BAKER, LCW ;

POPE, MT .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1960, 82 (16) :4176-4179

[2] DODECATUNGSTOPHOSPHORIC ACID HEXAHYDRATE, (H5O2+)3(PW12O403-) - TRUE STRUCTURE OF KEGGINS PENTAHYDRATE FROM SINGLE-CRYSTAL X-RAY AND NEUTRON-DIFFRACTION DATA [J].

BROWN, GM ;

NOESPIRLET, MR ;

BUSING, WR ;

LEVY, HA .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS, 1977, 33 (APR15) :1038-1046

[3] A PRACTICAL REFERENCE ELECTRODE [J].

GINER, J .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1964, 111 (03) :376-377

[4] OXYGEN REDUCTION KINETICS IN PHOSPHOTUNGSTIC ACID AT LOW-TEMPERATURE [J].

GIORDANO, N ;

ARICO, AS ;

HOCEVAR, S ;

STAITI, P ;

ANTONUCCI, PL ;

ANTONUCCI, V .

ELECTROCHIMICA ACTA, 1993, 38 (13) :1733-1741

[5] The structure and formula of 12-phosphotungstic acid. [J].

Keggin, JF .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-CONTAINING PAPERS OF A MATHEMATICAL AND PHYSICAL CHARACTER, 1934, 144 (A851) :0075-0100

[6] ELECTRON SPECTROSCOPY OF PLATINUM-OXYGEN SURFACES AND APPLICATION TO ELECTROCHEMICAL STUDIES [J].

KIM, KS ;

WINOGRAD, N ;

DAVIS, RE .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1971, 93 (23) :6296-&

[7] CATALYTIC ACTIVITY OF PLATINUM SUPPORTED ON CARBON FOR ELECTROCHEMICAL OXYGEN REDUCTION IN PHOSPHORIC-ACID [J].

KUNZ, HR ;

GRUVER, GA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1975, 122 (10) :1279-1287

[8]

MOFFAT JB, 1987, PREPARATION CATALYST, V4, P241

[9] EFFECT OF SPUTTERED FILM OF PLATINUM ON LOW PLATINUM LOADING ELECTRODES ON ELECTRODE-KINETICS OF OXYGEN REDUCTION IN PROTON-EXCHANGE MEMBRANE FUEL-CELLS [J].

MUKERJEE, S ;

SRINIVASAN, S ;

APPLEBY, AJ .

ELECTROCHIMICA ACTA, 1993, 38 (12) :1661-1669

[10]

Pope M. T., 1983, HETEROPOLY ISOPOLY O, V8