DIRECT ANODIC-OXIDATION OF METHANOL ON SUPPORTED PLATINUM RUTHENIUM CATALYST IN AQUEOUS CESIUM CARBONATE

被引:69
作者
RAUHE, BR
MCLARNON, FR
CAIRNS, EJ
机构
[1] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720
[2] UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720
关键词
D O I
10.1149/1.2044547
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Methanol electro-oxidation was carried out on porous gas diffusion electrodes in Cs2CO3 electrolytes at 100 to 140 degrees C and ambient pressures. It was found that Pt-Ru bimetallic catalysts supported on graphitized carbon provided enhanced performance, compared to supported Pt catalyst. Performance curves, based on unit catalyst mass, for Pt-Ru at 120 degrees C matched or exceeded previously reported performance data for supported Pt or Pt black in concentrated Cs2CO3 electrolytes at 120 to 150 degrees C at 8 atm, and for supported Pt-Ru in concentrated H3PO4 electrolytes at 200 degrees C. It was found that the polytetrafluoroethylene (PTFE) content in the reaction layer, and consequently the extent of wetting, had a marked effect on cell performance, and 20 to 30 weight percent PTFE was found to be optimal. Maximum cell performance was found at operating temperatures 10 to 15 degrees C below the boiling pint of the electrolyte.
引用
收藏
页码:1073 / 1084
页数:12
相关论文
共 60 条
[1]  
AGER JW, 1990, J APPL PHYS, V66, P3598
[2]  
[Anonymous], 1993, ELEMENTS XRAY DIFFRA
[3]   MECHANISM OF ELECTRO-OXIDATION OF METHANOL ON PLATINUM ELECTRODE [J].
BAGOTZKY, VS ;
VASSILYEW, YB .
ELECTROCHIMICA ACTA, 1967, 12 (09) :1323-+
[4]   GENERALIZED SCHEME OF CHEMISORPTION, ELECTROOXIDATION AND ELECTROREDUCTION OF SIMPLE ORGANIC-COMPOUNDS ON PLATINUM GROUP METALS [J].
BAGOTZKY, VS ;
VASSILIEV, YB ;
KHAZOVA, OA .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1977, 81 (02) :229-238
[5]   ELECTROCATALYTIC OXIDATION OF METHANOL ON PLATINUM-BASED BINARY ELECTRODES [J].
BEDEN, B ;
KADIRGAN, F ;
LAMY, C ;
LEGER, JM .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1981, 127 (1-3) :75-85
[6]  
Binder H., 1972, ELECTROCATALYSIS FUE, P43
[7]   A METHANOL FUEL CELL WITH AN INVARIANT ALKALINE ELECTROLYTE [J].
CAIRNS, EJ ;
BARTOSIK, DC .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1964, 111 (11) :1205-1210
[8]  
CAIRNS EJ, 1967, ELECTROCHEM TECHNOL, V5, P8
[9]   HIGH ACTIVITY PLATINUM ELECTROCATALYSTS FOR DIRECT ANODIC OXIDATION OF SATURATED HYDROCARBONS [J].
CAIRNS, EJ ;
MCINERNEY, EJ .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1967, 114 (10) :980-+
[10]   ELECTROCATALYSTS FOR DIRECT ELECTROCHEMICAL OXIDATION OF N-OCTANE IN FUEL CELLS [J].
CAIRNS, EJ ;
PAYNTER, J .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1968, 115 (12) :1218-&