PtEr纳米多孔合金的氧还原反应性能研究  

Oxygen Reduction Reaction Performance in PtEr Nanoporous Alloy

作　　者：田振 路鹏 向树青 韩志达 TIAN Zhen;LU Peng;XIANG Shuqing;HAN Zhida(School of Electronic and Information Engineering,Changshu Institute of Technology,Changshu 215500,China;Jiangsu Key Laboratory of Advanced Functional Materials,Changshu Institute of Technology,Changshu 215500,China)

机构地区：[1]常熟理工学院电子信息工程学院,江苏常熟215500 [2]常熟理工学院江苏省新型功能材料重点建设实验室,江苏常熟215500

出　　处：《常熟理工学院学报》2022年第5期5-8,共4页Journal of Changshu Institute of Technology

基　　金：江苏省高校“青蓝工程”中青年学术带头人。

摘　　要：将Pt和稀土合金化是提高氧还原电催化性能的最有效方法之一.然而,由于稀土极易被氧化,因此采用传统自下而上的溶液法制备Pt-稀土合金纳米材料非常困难.本文采用自上而下的去合金化法制备了PtEr纳米多孔合金,对其晶体结构、形貌、电子结构进行表征,并研究了其对氧还原反应的电催化性能.PtEr纳米多孔合金的晶体结构为面心立方结构,其形貌呈分级的纳米多孔结构.PtEr催化剂在酸性条件下的质量活性达到了0.21 A·mg^(-1),远高于商业Pt/C(0.10 A·mg^(-1)).加速耐久性测试表明PtEr催化剂的稳定性也优于Pt/C.Alloying Pt with the lanthanide is considered as the most effective method for improving the electrocatalytic performance of the oxygen reduction reaction.However,due to the oxophilicity of the lanthanide metals,the synthesis of the Pt-lanthanide by a bottom-up solution method is a challenging task.In this work,we prepared the PtEr nanoporous alloy by a top-down dealloying strategy.We investigated its crystal structure,microstructure,and electronic structure,and discussed the oxygen electroreduction performance.The PtEr samples have a face-centered crystal structure and hierarchical nanoporous morphology.The mass activity of the PtEr samples is 0.21 A·mg^(-1) in the acidic condition,which is much higher than that of the commercial Pt/C(0.10 A·mg^(-1)).The accelerated durability test indicates that the stability of the PtEr samples is better than that of the Pt/C.

关 键 词：去合金化 纳米多孔合金 氧还原反应 电催化 

分 类 号：O469[理学—凝聚态物理]