石墨烯纳米片担载Pt-Pd双金属纳米球作为甲醇氧化的电催化剂(英文)  

Platinum-palladium bimetallic nanospheres supported on graphene nanosheets as enhanced electrocatalyst for methanol oxidation

作　　者：杨子娟[1] 赵梦溪[1] 陈森[1] 樊阳[1] 

机构地区：[1]信阳师范学院化学化工学院,河南信阳464000

出　　处：《化学研究》2014年第3期273-279,共7页Chemical Research

基　　金：Supported by the Science&Technology Innovation Talents in Universities of Henan Province(13HASTIT012);the Science and Technology Key Project of Henan Education Department(12A150020);the College Outstanding Teachers Program of Henan Province(2012GGJS-128)

摘　　要：利用简便的无表面活性剂的方法合成了石墨烯担载的Pt-Pd双金属纳米球.首先由Na2PdCl4与氧化石墨烯发生氧化还原反应生成Pd晶种,然后诱导Pt纳米粒子的生长,得到Pt-Pd双金属纳米球.采用扫描电子显微镜、透射电子显微镜和X射线粉末衍射仪表征了合成的Pt-Pd/GR催化剂的结构,并测定了其作为甲醇氧化电催化剂的性能.结果表明,Pt-Pd/GR催化剂对甲醇氧化反应表现出高催化活性和稳定性,甲醇氧化电流密度为51.8mA·cm-2.Pt-Pd bimetallic nanospheres supported on graphene （GR） nanosheets were prepared by a facile surfactant-free method .Namely ,pre-nucleated Pd seeds were obtained via the redox reaction between Na2 PdCl4 and graphene oxide （GO） .Resultant Pd seeds were then allowed to induce the growth of Pt nanoparticles （NPs） affording Pt-Pd bimetallic nanospheres .The structure of as-synthesized Pt-Pd/GR catalyst was characterized by scanning electron microsco-py ,transmission electron microscopy and X-ray powder diffraction ,and its electrocalalytic per-formace towards the oxidation of methanol was evaluated .Results indicate that as-synthesized Pt-Pd/GR catalyst exhibits high catalytic activity and long-term stability towards the methanol oxidation reaction ,and it provides a specific current density of 51 .8 mA ·cm -2 for methanol oxidation .

关 键 词：石墨烯纳米片 担载Pt-Pd纳米球 甲醇氧化 电催化剂 

分 类 号：O646.542[理学—物理化学]