Electrocatalysis of carbon black- or activated carbon nanotubes-supported Pd–Ag towards methanol oxidation in alkaline media

✍ Scribed by Yi Wang; Zhao Min Sheng; Hongbin Yang; San Ping Jiang; Chang Ming Li

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 918 KB
• Volume: 35
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2010.07.172

✦ Synopsis

Carbon black supported bimetallic palladiumesilver (PdeAg/C) catalysts with different Ag loadings were prepared by borohydride reduction of mixed metal salts and carbon support.

Electrochemical activities of these catalysts towards methanol oxidation in alkaline media were examined and the PdeAg(1:1)/C catalyst (onset potential of À0.59 V) shows better catalytic activity than the Pd/C catalyst (onset potential of À0.49 V). The addition of Ag also facilitates methanol oxidation and removal of the adsorbed CO. The synthesized activated carbon nanotubes (CNTs)-supported PdeAg(1:1) catalyst exhibits even better catalytic activity contributed from larger electroactive surface area and better intrinsic catalytic activity than the carbon black supported bimetallic palladiumesilver (PdeAg/C) catalyst.