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2001 (1)
1Author    Gülsün Gökağaç3, Jean-Michel Legerb, Francoise HahnbRequires cookie*
 Title    Effect of a Thermal Treatment on the Activity of Carbon-Supported Pt, Pt+W and Pt+Mo Electrocatalysts for Methanol Oxidation Reactions  
 Abstract    Previous studies on carbon supported Pt, Pt+W and Pt+Mo indicated that Pt+Mo was the most active electrocatalyst at low potentials and that Pt+W has similar properties as pure Pt in methanol oxidation. Those samples were thermally treated at 900 °C in a hydrogen gas atmosphere for 6 hours to observe the effect on metal particle sizes and on their distribution on carbon support. It was found that thermally treated Pt+Mo/XC-72 remains the most active catalyst at all potentials compared to the other heated samples. The heat treatment caused the sintering of small particles leading to a decrease in activity of the catalysts except Pt+Mo/XC-72. The heat treated samples were characterised by voltammetry, X-ray diffraction, transmission electron microscopy and energy dispersive X-ray analysis techniques. The methanol oxidation reaction was followed by in-situ FTIR spectroscopy to identify products and adsorbed species on the surface of electrode. 
  Reference    Z. Naturforsch. 56b, 1306—1314 (2001); received May 8 2001 
  Published    2001 
  Keywords    Methanol Oxidation, Infrared Reflectance Spectroscopy, Carbon-Supported Catalysts 
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 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1306.pdf 
 Identifier    ZNB-2001-56b-1306 
 Volume    56