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Platinum or silver based bimetallic supported catalyst, process for its preparation and use in electrochemical cells
Platinum or silver based bimetallic supported catalyst, process for its preparation and use in electrochemical cells
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机译:铂或银基双金属负载催化剂,其制备方法和在电化学电池中的使用
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摘要
A stable bi-metallic catalyst comprises an electronic conducting support and a metallic coating comprising a metal M1 chosen from Pt and Ag and a second metal M2 different from M1 and chosen from Pt, Ag, Au, Rt, Ir, R and Os. An Independent claim is also included for the preparation of the catalyst comprising (a) impregnating the conducting support by a solution of the metal salt M1 chosen from Pt or Ag and by a solution of the metal salt M2 chosen from Pt or Ag, Au, Ru, Ir, R, Os; (b) evaporating slowly under stirring and under inert gas bubbling; (c) drying of the powder at atmospheric pressure at 60-80 degrees C, then under reduced pressure at 90-110 degrees C; and (d) heating of the resulting powder under hydrogen at 300-600 degrees C. The heat rate was 0.2-1.5 degrees C/min and the soak time was 20 hours or preferably 2-16 hours.
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