Study on the co-catalytic effect of titanium dioxide and titanate nanomaterials on platinum-based catalysts in direct alcohol fuel cells
Study on the co-catalytic effect of titanium dioxide and titanate nanomaterials on platinum-based catalysts in direct alcohol fuel cells
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DOI：
10.1016/j.electacta.2011.09.084
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发表时间：
2011-12
影响因子：
6.6
通讯作者：
P. Xiao;Xun Guo;Dao-Jun Guo;Huanqiao Song;Jie Sun;Zhengyuan Lv;Yuan Liu;X. Qiu;Wentao Zhu;Liquan Chen;U. Stimming
中科院分区：
文献类型：
--
作者：
P. Xiao;Xun Guo;Dao-Jun Guo;Huanqiao Song;Jie Sun;Zhengyuan Lv;Yuan Liu;X. Qiu;Wentao Zhu;Liquan Chen;U. Stimming
合成了二氧化钛（TiO 2）和钛酸盐纳米管、纳米带和纳米棒等材料，并将其与Pt/C催化剂混合，研究了它们的助催化作用。在酸性介质中，与这些纳米材料混合后，Pt/C的甲醇氧化电流显著增加，而乙醇氧化电流没有增加。结合材料表征和电化学测试，结果表明，具有合适孔道结构和较高质子电导率的助催化剂能促进甲醇氧化，而含有较多吸附水和结构水的助催化剂能更好地促进中间体的氧化。TiO 2（B）纳米带和钛酸盐纳米管是近年来发展起来的新型纳米材料，质子可以沿它们的长轴沿着迁移。它们表现出良好的助催化作用，在直接醇类燃料电池（DAFC）中有着广阔的应用前景。
Titanium dioxide (TiO2) 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. TiO2(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).