Influence on Electrocatalysis Properties of Core-shell structured PtCu/CeOx membrane catalysts by Acid Treatment
Recently, core-shell structured electrocatalysts have attracted increasing attention because of their unique structure in reducing the a mount of Pt.The preparation methods and charac terization techniques for Pt-based core-shell structured electrocatalysts in fuel cells have received much attention.In our study, the PtCu/CeOx cata lysts were manufactured by Ion Beam Sputtering (IBS) technology.It was found that PtCu@Pt core -shell structured catalysts could be obtained by de -alloying method.The obtained catalysts were characterized by High Resolution Transmission Elec tron Microscopes(HRTEM) and X-ray diffraction (XRD), and the cyclic voltammetry (CV) and line.ar sweep voitammetry (LSV) were tested by tri-e lectrode system to analyze the influence of different acid treatment conditions on the membrane electro catalysis performance, the results showed that after the acid treatment: temperature 50 ℃, H2SO4(0.5mol/L), 30 min, the decomposition voltage (Ed) and exchange current density (i0) of membrane sample was-0.227 (V vs SCE) and 4.43 mA/cm2 respectively in balanced condition, even though its platinum loading capacity was only 0.05 mg/cm2, whose performance price ration was very high.
full cell core-shell Pt Cu Ce acid treatment electrocatalysis performance
Bin Yang XinYu Hao Neng Huang
Faculty of Materials Science and Engineering,Kunming University of Science and Technology,No.253,XueFu mad,Kunming 650093,P.R.China
国际会议
The 12th China-Russia Symposium on Advanced Materials and Technologies(第十二届中俄双边新材料新工艺国际会议)
昆明
英文
109-113
2013-11-19（万方平台首次上网日期，不代表论文的发表时间）