화학공학소재연구정보센터
Electrochimica Acta, Vol.58, 541-550, 2011
Study on the co-catalytic effect of titanium dioxide and titanate nanomaterials on platinum-based catalysts in direct alcohol fuel cells
Titanium dioxide (TiO(2)) and titanate materials such as nanotubes, nanobelts and nanorods were synthesized and their co-catalytic effects were studied by mixing them with Pt/C catalysts. After mixing with these nanomaterials, the methanol oxidation current of Pt/C was increased significantly, but ethanol oxidation current of Pt/C was not increased in acidic medium. Combining with material characterization and electrochemical measurements, the result showed that the co-catalysts with suitable porous channels and higher proton conductivity could accelerate the methanol oxidation, and the co-catalysts containing more adsorbed and structural water could better increase the oxidation of intermediates. TiO(2)(B) nanobelts and titanate nanotubes are newly developed nanomaterials and protons could transfer along their long-axis. They have showed good co-catalytic effect and would have more applications in direct alcohol fuel cells (DAFC). (C) 2011 Published by Elsevier Ltd.