氧气在不同粒径Pt／C催化剂上的电催化还原  

Electrocatalytic Reduction of Oxygen on Pt/C Catalysts with Different Pt Particles Sizes

作　　者：王彦恩[1,2] 曹爽[1,2] 崔朋雷[1,2] 唐亚文[3] 陆天虹[3] 

机构地区：[1]河北农业大学理学院 [2]河北农业大学现代科技学院,保定071000 [3]南京师范大学化学与材料科学学院,南京210097

出　　处：《无机化学学报》2014年第4期867-871,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(21073094,21273116);江苏高校优势学科建设工程资助项目

摘　　要：在甲醇溶剂中,利用SnCl2作为还原剂,通过控制反应条件制备了带有不同粒径Pt粒子Pt/C催化剂。X-射线衍射和透射电镜的研究表明获得的Pt/C催化剂中Pt粒子具有高度的均一性和良好的分散度。电化学研究显示,对于氧气的电催化还原,Pt/C催化剂存在着明显的粒径效应。当Pt粒子粒径为3.2 nm时,Pt/C催化剂对氧气的电催化还原的质量比活性最佳。Pt/C催化剂对氧气的粒径效应可能与其表面含氧基团含量、Pt粒子的比表面积及其晶面结构相关。Pt/C catalyst with the different Pt particles sizes were prepared with the organic sol method, which was synthesized in a methanol solution by chemical reduction of the corresponding metal salts using SnCl2 as reducing agent. The catalysts which have different average size, great uniformity and high distribution of the metal particles were prepared by controlling the reacting condition. It was electrochemically proved that the effect of average particle size of ultrafine platinum particles for oxygen reduction was obvious. When the average particle size of Pt is 3.2 nm, the mass activity of the Pt/C catalysts for the oxygen reduction is the best. This effect may be related to the quantity of the oxygen-containing species on it, the apparent surface area of the platinum particles and the crystal structure.

关 键 词：PT 催化剂 氧气还原 粒径效应 

分 类 号：O613.71[理学—无机化学]