Nanocomposite of polyaniline/carbon nanotube as Pt catalyst carrier for methanol electrocatalytic oxidation

POLY 182

Yiting Xu, yitingxu@163.com, Xiaoliang Peng, Yuanming Deng, Guangcai Lei, Yifang Zheng, Yingying Ma, and Lizong Dai, lzdai@xmu.edu.cn. Department of Materials Science and Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
The composite of polyaniline (PANI) and multi-walled carbon nanotube (MWCNT) was prepared by in-situ chemical polymerization. In this composite MWCNT is regarded as the matrix material, and PANI is evenly covered on the surface of MWCNT. Platinum particles are deposited on the PANI/MWCNT composite by chemical reduce method. XRD and SEM measurements are performed for analyzing the structure and surface morphology of composite carrier and catalyst, which shows the apropos modality of the PANI/MWCNT composite as catalyst carrier, as well as a more homogeneous dispersion and smaller particle-size of spherical Pt clusters on the exterior of PANI/MWCNT than MWCNT. Chronoamperogram measurements shows the attenuation of current in a period of time indicating that Pt-modified PANI/MWCNT electrode performs higher CO anti-poisoning ability than Pt-modified pure MWNT electrode toward methanol oxidation. The existence of PANI improves anti-poisoning ability of Pt catalyst due to the synergic interaction between Pt and the carrier.
 

General Papers: Functional Materials
6:00 PM-8:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Polymer Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007