基于不同碳载体的直接乙醇燃料电池阳极Pt基催化剂的制备及性能表征

本文采用活性炭、介孔碳、碳纳米管和石墨烯为催化剂载体，添加CeO2作为助催化剂，用微波辅助乙二醇还原氯铂酸法制备了五组催化剂。利用X射线衍射仪(XRD)、扫描电镜(SEM)和电子能谱(EDAX)、比表面积及孔径分析仪(BET)及X射线光电子能谱(XPS)等对CeO2及催化剂进行微观结构表征；利用电化学工作站对催化剂进行电化学性能测试。结果表明，以石墨烯为载体并加入CeO2助催化剂合成的催化剂对乙醇的催化氧化具有最佳的活性，稳定性及抗中毒能力，其电化学活性表面积为86.83 m2/g，峰电流密度值为751.03 A/g，且对乙醇催化氧化的活化能最低，1100s时的稳态电流密度值为67.33 A/g。

Preparation and Characterization of Anode Pt-based Catalysts for Direct Ethanol Fuel Cells Based on Different Carbon Carriers

In this paper, activated carbon, mesoporous carbon, carbon nanotubes and graphene were used as catalyst carriers, CeO2 was added as cocatalyst, and five groups of catalysts were prepared by microwave-assisted glycol reduction of chloroplatinic acid. X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron energy spectrum (EDAX), specific surface area and pore size analyzer (BET), and X-ray photoelectron spectroscopy (XPS) were used to characterize the microstructure of CeO2 and catalysts. The electrochemical performance of the catalysts was tested by electrochemical workstation. The results showed that the catalyst synthesized with graphene as the carrier and CeO2 as the co-catalyst have the best activity, stability and resistance to poisoning for the catalytic oxidation of ethanol. The electrochemical active area is 86.83 m2/g, the peak current density value is 751.03 A/g, the activation energy for the catalytic oxidation of ethanol is the lowest and the steady state current density at 1100s is 67.33 A/g.