Impact on Structure and Composition of Carbon Supported PtCuLaOx Membrane Electrode by Acid treatment
For the use of Fuel Cells in transportation, one of the key points is to reduce Pt loading in Pt/C catalytic electrode. In the study, PtCuLaOx heterogeneous membrane manufactured on the surface of carbonaceous substrates by Ion Beam Sputtering technology, and also was treated by different concentration H2SO4 solution. Moreover, phase composition, Valence state and Pt loading of these electrodes was analyzed, respectively. It was found that content of doping La in catalytic membrane could increase rich-oxygen ability, and PtCuLaOx with Pt loading less than 0.041mg/cm2 (the electrode area), in which its having complicated valence state, indicated that Pt had mutual effect with Cu, La and O, respectively. In addition, through H2SO4 solution treatment and along with increased H2SO4 concentration, the orientation growing of Pt(111) would be promoted, and Pt-Pt interval on surface of PtCuLaOx would reduce owing to Cu was dissolved from (Pt), and average grain size of PtCuLaOx decreased and crystal face spacing steady. Our study indicated that membrane electrodes through Acid treatment could be used in Fuel Cells and made Fuel Cells have low Pt loading and high catalytic activities, simultaneously.
Structure Composition PtCuLaOx Heterogeneous Acid treatment Fuel Cells.
Bin Yang Mingzhe Shen
School of Materials Science and Engineering, Kunming University of Science and Technology, 253 Xuefu Avenue, Kunming, Yunnan, 650093, China
国际会议
大连
英文
1285-1288
2011-10-19（万方平台首次上网日期，不代表论文的发表时间）