Ni添加对直接乙醇燃料电池Pt基催化剂催化性能的影响

本文通过水热法制备出孔径分布范围3.1~4.2nm,比表面积为174.72m₂/g的CeO₂作为助催化剂,以碳纳米管为载体,采用微波辅助乙二醇法制备PtNiCeO₂/C催化剂,探究Ni添加对Pt基催化剂电催化性能的影响。利用X射线衍射仪(XRD)、比表面积及孔径分析仪(BET)、扫描电镜(SEM)和电子能谱(EDAX)对所制备的CeO₂及催化剂进行微观表征,利用电化学工作站对所制备的催化剂进行电化学性能测试。结果表明,添加CeO₂且催化剂中Pt与Ni的比例为5:1时,制备的催化剂电催化性能最优,其电化学活性表面积为90.41m₂/g,对乙醇催化氧化的峰电流密度值为837.67A/g,1100s的稳态电流密度值为178.33A/g,说明添加一定量的Ni,可提高催化剂的抗中毒能力和电催化性能。

Effect of Ni Addition on the Catalytic Performance of Pt - based Catalysts for Direct Ethanol Fuel Cells

In this paper, CeO₂ with a pore size distribution range of 3.1~4.2nm and a specific surface area of 174.72m₂/g was prepared as a co-catalyst by hydrothermal method. PtNiCeO₂/C catalyst was prepared by microwave assisted glycol method using carbon nanotubes as carrier. Effect of Ni addition on electrocatalytic performance of Pt based catalysts. The prepared CeO₂ and the catalyst were characterized by X-ray diffraction (XRD), BET, SEM and EDAX. The prepared catalyst was characterized by electrochemical workstation electrochemical performance test. The results show that the electrocatalytic activity of CeO₂ catalyst prepared by adding CeO₂ and the ratio of Pt to Ni is 5:1, the electrocatalytic activity is 90.41m₂/g and the peak current density is 837.67A/g, 1100s steady-state current density of 178.33A/g, indicating that adding a certain amount of Ni, can improve the catalyst anti-toxic and electrocatalytic performance.