Carbon-TiO_2 Composite Nanofibers as a Promising Support for PtRu Anode Catalyst of DMFC
Carbon-TiO_2 Composite Nanofibers as a Promising Support for PtRu Anode Catalyst of DMFC
复制标题
碳-TiO_2复合纳米纤维作为DMFC PtRu阳极催化剂的良好载体
DOI：
10.1149/05002.1959ecst
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
T. Tsujiguchi and N. Nakagawa
中科院分区：
文献类型：
--
作者：
M. A. Abdelkareem;Y. Ito;T. Tsujiguchi and N. Nakagawa
采用静电纺丝法制备了碳-二氧化钛复合纳米纤维(C-TiO2Nf)，并将其作为PtRu纳米粒子的载体，用于甲醇氧化反应。将制备的催化剂与炭黑、Vulcan XC-72R和纳米二氧化钛负载的催化剂进行了催化活性和耐久性的比较。用X射线衍射法、循环伏安法和计时电流法研究了催化剂的晶体结构和电催化性能。与Vulcan XC-72R相比，(C-TiO2Nf)Nf载体上制备的PtRu的活性和耐久性显著提高，阳极峰电流密度提高了3倍，阳极电位漂移了约0.15V。在(C-TiO2Nf)上制备的催化剂具有较高的稳定性和活性，这与二氧化钛在减少CO中毒方面的作用、碳在保持碳载体高电导率方面的作用以及催化剂纳米颗粒在纳米纤维载体上的良好分散有关。
Carbon-TiO2 composite nanofibers,(C-TiO2) NF, have been fabricated by electrospinning and used as a support for PtRu nanoparticles for the catalyst of methanol oxidation. The catalytic activity and durability of the prepared catalyst was compared with that supported on carbon black, Vulcan XC-72R, and TiO2 nanoparticles. The crystal structure and electrocatalytic properties of the as-obtained catalysts have been investigated by X-ray diffraction, cyclic voltammetry and chronoamperometry. The PtRu prepared on the (C-TiO2) NF support showed a significant increase in the activity and durability, where the anodic peak current density increased by three times and the anodic potential shifted around 0.15 V compared to that supported on Vulcan XC-72R. The high stability and activity of the catalyst prepared on the (C-TiO2) NF would be related to the role of the TiO2 in decreasing the CO poisoning and the role of the carbon in keeping the high conductivity of the carbon support as well as the better dispersion of the catalyst nanoparticles on the nanofiber support.