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Citation: LI Li, WU Gang, YE Qing, DENG Wei, XU Bo-Qing. Electrochemical Modification of Pt/C Catalyst by Silicomolybdic Acid[J]. Acta Physico-Chimica Sinica, ;2006, 22(04): 419-423. doi: 10.1016/S1872-1508(06)60013-2 shu

Electrochemical Modification of Pt/C Catalyst by Silicomolybdic Acid

1.
Innovative Catalysis Program, Key Laboratory of Organic Optoelectronics and Molecule Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China

Received Date: 10 October 2005
Available Online: 10 April 2006

Modification of conventional Pt/C electrocatalyst with silicomolybdic acid (SiMoA) was performed using electrochemical cyclic voltammetry method. The modified and unmodified catalysts were tested under identical conditions for the electrooxidation of CO, methanol, and ethanol. In the CO stripping experiments, the modified catalyst was characterized by significant shifts (80 and 60 mV) to lower onset potential and peak potentials for CO electrooxidation, suggesting better CO tolerant property of the modified catalyst. In the electrooxidation of methanol and ethanol, the modified catalyst was featured by significantly increased current densities due to reduced residence time of the reaction intermediates, showing significantly higher electrocatalytic activity for electrooxidation of alcohols.
- PEMFCs(proton exchange membrane fuel cells);CO tolerance catalysts;Silicomolybdic acid;Alcohols electrooxidation;CO electooxidation
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