GO/CuMoO4固载Pd-Co-Ag纳米合金的制备及其电催化性能研究  

Preparation and electrocatalytic properties of Pd-Co-Ag nanoalloys fixed on GO/CuMoO4 composites

作　　者：万正睿 杨婕妤 张淑娟 张翊青 莫晗 刘红英[1] 周立群[1] WAN Zheng-rui;YANG Jie-yu;ZHANG Shu-juan;ZHANG Yi-qing;MO Han;LIU Hong-ying;ZHOU Li-qun(Hubei University,College of Chemistry and Chemical Engineering,Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials,Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules,Wuhan 430062,China)

机构地区：[1]湖北大学化学化工学院,有机化工新材料湖北省协同创新中心,有机功能分子合成与应用教育部重点实验室,湖北武汉430062

出　　处：《高校化学工程学报》2020年第5期1213-1220,共8页Journal of Chemical Engineering of Chinese Universities

基　　金：有机功能分子合成与应用教育部重点实验室项目(KLSAOFM1913)。

摘　　要：为了制备出较好的新型复合催化剂,为工业醇类燃料电池的开发和应用提供新途径,采用水热与煅烧法合成出氧化石墨烯/钼酸铜(GO/CuMoO4)片层结构复合型载体,再通过浸渍还原法成功地将Pd-Co-Ag三金属纳米合金固载到GO/CuMoO4上获得PdCoAg@rGO/CuMoO4催化剂,用于碱性介质中乙二醇(EG)的电催化氧化。比较单金属Pd、双金属PdCo、PdAg和三金属PdCoAg@rGO/CuMoO4负载型催化剂以及商业Pd/C的电催化性能,结果表明,三金属PdCoAg@rGO/CuMoO4具有更高的电催化活性和耐受性,其正向最高电流密度为185.11 mA×cm^-2,是商用Pd/C(26.99mA×cm^-2)的6.86倍,而且活性表面积最大(58.86 cm^2)、起始电位最低(-0.52 V)。氧化石墨烯(GO)的存在和Ag、Co的引入提高了催化剂的抗毒性和稳定性。In order to prepare novel composite catalysts which provide new pass ways for the development and application of industrial alcohol fuel cells,trimetallic Pd-Co-Ag nanoalloys were successfully fixed on sheet-like graphene oxide/copper molybdate(GO/CuMoO4)composites that were obtained by facile hydrothermal way and calcination through impregnation-reduction methods.The PdCoAg@rGO/CuMoO4 catalysts were employed for electrocatalytic oxidation of ethylene glycol(EG)in an alkaline medium.Compared with monometallic Pd,bimetallic PdCo and commercial Pd/C loading catalysts,trimetallic PdCoAg@rGO/CuMoO4 exhibited the highest electrocatalytic activity and tolerance of poison.The forward peak current density Ip,f was 185.11 m A×cm^-2,which was about 6.86 times higher than that of commercial Pd/C(26.99 mA×cm^-2).It also possessed the largest electrochemical surface area(ECSA)of 58.86 cm2 and the lowest onset potential Eonset of-0.52 V.The existence of graphene oxide and the introduction of metal Ag and Co improve the toxicity resistance and stability of the catalyst.

关 键 词：CuMoO4 氧化石墨烯 Pd-Co-Ag纳米合金 电催化氧化 燃料电池 

分 类 号：O643.3[理学—物理化学]