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

Conference · Sun Dec 31 00:00:00 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; TRN: IM9604%%4
• Resource Relation: Conference: Spring meeting of the Materials Research Society (MRS), San Francisco, CA (United States), 17-21 Apr 1995; Other Information: PBD: 1995; Related Information: Is Part Of Materials for electrochemical energy storage and conversion -- Batteries, capacitors and fuel cells; Doughty, D.H. [ed.] [Sandia National Labs., Albuquerque, NM (United States)]; Vyas, B. [ed.] [AT and T Bell Labs., Murray Hill, NJ (United States)]; Takamura, Tsutomu [ed.] [Rikkyo Univ., Tokyo (Japan)]; Huff, J.R. [ed.] [Ballard Power Corp., Albuquerque, NM (United States)]; PB: 463 p.; Materials Research Society symposium proceedings, Volume 393
• Country of Publication: United States
• Language: English

Related Subjects

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