M_cPt_s纳米催化剂的电催化氧还原性能  

Electrocatalytic oxygen reduction performance of M_cPt_s nanocatalyst

作　　者：梅艳 乐栋贤[1] 刘世斌[2] 

机构地区：[1]乐山职业技术学院新能源工程系,四川乐山614000 [2]太原理工大学化学化工学院,山西太原030024

出　　处：《电池》2017年第4期204-207,共4页Battery Bimonthly

基　　金：国家自然科学基金(20676088);乐山市科技局市级课题(15GZD132);乐山职业技术学院院级课题(9KY2014034)

摘　　要：采用两步化学还原法合成不同Pt壳层厚度的M_cPt_s(M=Ni、Co、Cu和Ag)纳米粒子,用XRD、XPS和TEM测试分析粒子的结构和组成,动电位扫描法测试对氧还原反应的活性和抗甲醇性能。M_cPt_s纳米粒子为球形,平均粒径为35 nm,Pt壳层平均厚度约6 nm;相对于Pt/C,当M为Ni、Co时,氧还原活性提高,当M为Cu、Ag时,氧还原活性降低;Co、Cu和Ag为核芯,还可提高M_cPt_s/C的抗甲醇性能。M_cPt_s（M = Ni,Co,Cu and Ag） nanoparticles with different thickness of Pt shell were prepared by two-step chemical reduction method. The structure and composition of particles were characterized by XRD,XPS and TEM tests. The catalytic activity of oxygen reduction reaction（ ORR） and methanol-resistance of nanoparticles were tested by the potentiodynamic test. The fabricated McPtsnanoparticles were spherical in shape,the average diameter was 35 nm,average thickness of Pt shell was about 6 nm. The activity of ORR of M = Ni,Co was increased and those of M = Cu,Ag were decreased when compared with Pt/C. The methanol tolerance of M_cPt_s/C was promoted Co,Cu and Ag were the core.

关 键 词：电催化 氧还原 核壳结构 直接甲醇燃料电池(DMFC) 抗甲醇性 

分 类 号：O643.36[理学—物理化学] TM911.4[理学—化学]