The effect of Ru on unsupported Pt-Ru alloys for methanol electro-oxidation at different temperatures

Conference · Sat Dec 30 23:00:00 EST 1995

OSTI ID:162900

Chu, D; Walker, C; Gilman, S ^[1]

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1. Army Research Lab., Fort Monmouth, NJ (United States). Electronics and Power Sources Directorate

Unsupported different atomic ratios of platinum-ruthenium bulk alloys were prepared. The alloys were characterized by cyclic voltammetry, x-ray diffraction and energy dispersive X-ray spectroscopy. These alloys were also tested as anodes for methanol electro-oxidation in sulfuric acid over a range of temperatures. Ruthenium is inactive for methanol electro-oxidation at 25 C, but becomes active at higher temperatures. When a comparison is made on the basis of true (hydrogen adsorption) surface area, a 30 atomic percent Ru electrocatalyst provides the highest activity for methanol electro-oxidation as measured at either 0.4 or 0.5 V vs RHE at both 25 and 60 C.

• OSTI ID: 162900
• Report Number(s): CONF-950412--; ISBN 1-55899-296-0
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
36 MATERIALS SCIENCE
ALCOHOL FUEL CELLS
CATALYSTS
CRYSTAL STRUCTURE
CURRENT DENSITY
ELECTRIC POTENTIAL
ELECTROCHEMISTRY
ELECTRODES
PLATINUM
PLATINUM ALLOYS
RUTHENIUM
RUTHENIUM ALLOYS
SULFURIC ACID
SURFACE AREA
TEMPERATURE DEPENDENCE
VOLTAMETRY
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY