|
|||||
|
|
Polyoxometallate-stabilized platinum catalysts on multi-walled carbon nanotubes for fuel cell applications |
|
| Authors: | Z.P. Guo D.M. Han D. Wexler H.K. Liu |
| Affiliation: | a School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, NSW 2522, Australia b Institute for Superconducting & Electronic Materials, University of Wollongong, NSW 2522, Australia c State Key Laboratory of Optoelectronic Materials and Technologies, Institute of Optoelectronic and Functional Composite Materials,Sun Yat-Sen University, Guangzhou 510275, PR China |
| Abstract: | A novel catalyst, Pt-PMo12-CNT, with well-dispersed Pt nanoparticles and monolayer PMo12 on multi-walled carbon nanotubes (CNTs) is reported. A polyoxometallate (PMo12) was chemically adsorbed on the surface of Pt nanoparticles and on outer walls of CNTs. These effectively prevented the agglomeration of Pt nanoparticles and CNTs due to the electrostatic repulsive interactions between negatively charged PMo12 monolayers. The as-prepared Pt-PMo12-CNT materials show higher electrocatalytic activity, higher cycle stability, and better tolerance to poisoning species in methanol oxidation than do Pt-CNT catalysts prepared by the same method. The reasons for the improved catalytic performance of the Pt-PMo12-CNT catalysts are discussed. |
| Keywords: | Polyoxometallate Methanol oxidation Well-dispersed ultrafine nanocrystals Fuel cells |
| 本文献已被 ScienceDirect 等数据库收录！ | |