| Proton exchange membrane fuel cell (PEMFC) which could work at low temperature is one of the most promising cells used for automobile power supply, as it has prominent merits such as high efficiency, green energy resources and et al. And the key materials and technologies of PEMFC, Pt/C catalyst is widely used nowadays. However, reformed gas, a kind of mainly ideal hydrogen source, with trace CO has great impact on Pt/C catalyst efficiency. Adulterates metallic element could help with this problem, nowadays most of the research focus on Pt-Ru/C.In this paper, we have investigated the reverse micelles method of Pt-Ru/C catalyst preparation for PEMFC. The influence to Pt-Ru/C physical and chemical properties was studied on factors of technical routes, surfactant, reductant and the mol ratio of water to surfactant et al. The result demonstrated that Pt-Ru/C with SDS surfactant, KBH4 reductant and the mol ratio of water to surfactant was 7, manifested great performance such as higher metal load, better alloying capability, smaller particle diameter, better dispersing degree, et al.Comparing the Pt-Ru/C electrocatalyst prepared by the reverse micelles method to that of the commercialization catalyst from Johnson Matthey that stands for the leading level of the world. Energy Dispersion Spectrometry shows that both products have nearly the same mental adsorption ratio, and the mol ratio of Pt-Ru approaches 1:1; X-ray Diffraction shows that they have the same crystalline form, crystal lattice parameters, particle diameter and alloying capability. Cyclic voltammograms data show that performance of CO-tolerance is lower than commercialization one. MEA power density curves of a single PEMFC shows that two catalysts have the same power density.
|
PDF Full Text Request