文献类型：期刊文献

英文题名：Different polyaniline/carbon nanotube composites as Pt catalyst supports for methanol electro-oxidation

作者：Li, Xingwei[1];Wei, Jiadi[1];Chai, Yuzheng[1];Zhang, Shuo[2];Zhou, Min[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Shanghai Key Lab Adv Polymer Mat,Key Lab Ultrafin, Shanghai 200237, Peoples R China;[2]Univ Akron, Dept Polymer Sci, Coll Polymer Sci & Polymer Engn, Akron, OH 44325 USA

年份：2015

卷号：50

期号：3

起止页码：1159

外文期刊名：JOURNAL OF MATERIALS SCIENCE

收录：;EI(收录号：20144400138738);WOS:【SCI-EXPANDED(收录号:WOS:000346777800014)】；

语种：英文

外文关键词：Yarn - Methanol - Multiwalled carbon nanotubes (MWCN) - Platinum - Electrooxidation - Catalyst supports - Platinum compounds - Reaction intermediates

摘要：Polyaniline/carbon nanotube composites as Pt catalyst supports for methanol electro-oxidation have been reported. Conventionally, the size and distribution of Pt catalysts were improved in the presence of polyaniline (PAni), and an interaction between Pt and N atoms in PAni could prevent Pt catalysts from aggregation and detachment. In this work, polyaniline-modified multi-walled carbon nanotube (PAni-MWCNT) composites, with different loading levels of PAni, were synthesized by in situ oxidative polymerization of aniline on the surface of MWCNT. And Pt catalysts supported by these composites were prepared by the liquid phase reduction. Our studies revealed that the loading level of PAni affected the proportion of the different valence Pt components. And the proportion of Pt(0) and Pt(II) was also important for improving the electro-catalytic performance of Pt catalysts. The proper proportion of Pt(II) was essential for coordination of Pt with oxygen-containing ligands (OH center dot, H2O) and thus accelerating oxidation of Pt (CO)(ads) with release of CO2 by improving the tolerance to intermediate carbonaceous species.