Choi M, Han C, Kim I T, An J C, Lee J J, Lee H K, Shim J
Department of Nano and Chemical Engineering, Kunsan National University, Jeonbuk 573-701, Korea.
J Nanosci Nanotechnol. 2011 Jan;11(1):738-41. doi: 10.1166/jnn.2011.3218.
To improve the catalytic activity of palladium (Pd) as a cathode catalyst in direct methanol fuel cells (DMFCs), we prepared palladium-titanium oxide (Pd-TiO2) catalysts which the Pd and TiO2 nanoparticles were simultaneously impregnated on carbon. We selected Pd and TiO2 as catalytic materials because of their electrochemical stability in acid solution. The crystal structure and the loading amount of Pd and TiO2 on carbon were characterized by X-ray diffraction (XRD) and energy dispersive X-ray microanalysis (EDX). The electrochemical characterization of Pd-TiO2/C catalysts for the oxygen reduction reaction was carried out in half and single cell systems. The catalytic activities of the Pd-TiO2 catalysts were strongly influenced by the TiO2 content. In the single cell test, the Pd-TiO2 catalysts showed very comparable performance to the Pt catalyst.
为了提高钯（Pd）作为直接甲醇燃料电池（DMFC）阴极催化剂的催化活性，我们制备了钯 - 二氧化钛（Pd-TiO₂）催化剂，其中钯和二氧化钛纳米颗粒同时负载在碳上。我们选择钯和二氧化钛作为催化材料是因为它们在酸性溶液中的电化学稳定性。通过X射线衍射（XRD）和能量色散X射线微分析（EDX）对碳上钯和二氧化钛的晶体结构及负载量进行了表征。在半电池和单电池系统中对用于氧还原反应的Pd-TiO₂/C催化剂进行了电化学表征。Pd-TiO₂催化剂的催化活性受二氧化钛含量的强烈影响。在单电池测试中，Pd-TiO₂催化剂表现出与铂催化剂非常相当的性能。
