无机材料学报2012，Vol.27Issue(1)：95-101,7.DOI:10.3724/SP.J.1077.2012.00095
薄壳层核壳型Ni/Pt纳米粒子的制备及电催化性能
Preparation and Electrocatalytic Performance of Thin-shell Ni/Pt Core-shell Nanoparticles
摘要
Abstract
The Ni/Pt core-shell nanoparticles with different shell thicknesses were prepared by composite coating of colloid particles and then characterized by HRTEM, EDS, XPS and XRD. Electrochemical properties for the oxygen electro-reduction reaction and methanol electro-oxidation were measured by potentiodynamic and cyclic voltammetry. The experimental results show that Ni/Pt core-shell nanoparticles are spherical and the mean particle size of Nii-Pto.o67 is about 7 nm with shell thickness of 1 nm. Compared with Pt/C, Ni/Pt core-shell nanoparticels possess higher activity. Ni1-Pt0.067/C has the highest catalytic activity in these prepared catalysts with different thickness, and its peak current density can reach 143.06 mA/mg in 0.5 mol/L H2SO4 solution, 1.4 times of that of Pt/C for O2 electro-reduction reaction. Peak current density of Ni1-Pt0.067/C for methanol electro-oxidation reaches 538.3 mA/mg in 0.5 mol/L H2SO4+1.0 mol/L CH3OH solution, which is 5.2 times of that of Pt/C. Based on 1 mg Pt, the specific mass activity of Nii-Pt0.067/C is 30-fold higher than that of Pt/C nanoparticles.关键词
核壳型Ni/Pt纳米粒子/制备/氧电还原/甲醇电氧化Key words
Ni/Pt core-shell nanoparticle/ preparation/ oxygen electro-reduction/ methanol electro-oxidation分类
信息技术与安全科学引用本文复制引用
刘世斌,杨春英,张忠林,段东红,郝晓刚,李一兵..薄壳层核壳型Ni/Pt纳米粒子的制备及电催化性能[J].无机材料学报,2012,27(1):95-101,7.基金项目
国家自然科学基金(20676088) （20676088）
国家高技术研究发展计划(863计划)项目(2006AA05Z139) （863计划）
