Effect of CeO2-ZrO2 on Pt/C electrocatalysts for alcohols oxidation
来源期刊：Journal of Rare Earths2016年第3期
论文作者：王青春 刘振朋 安胜利 王瑞芬 王艳玲 徐拓
文章页码：276 - 282
摘 要：The electrocatalytic activity and stability of Pt/C catalyst modified by using CeO2-ZrO2 mixed oxides for the alcohols electrochemical oxidation as probes were investigated. The catalyst samples were characterized by X-ray diffraction（XRD） and scanning electron microscopy（SEM）. The electrochemical properties were measured by a three electrode system on electrochemical workstation（IVIUM）. The results showed that the presence of CeO2-ZrO2 might be associated with the presence of Pt, which indicated that possibly there was synergistic effect between CeO2-ZrO2 and Pt nanoparticles. The electrocatalytic activity and stability of Pt-MOx/C（M=Ce, Zr） for methanol and ethanol oxidation was better than that of Pt-CeO2/C, which was attributed to that CeO2-ZrO2 composited oxides enhanced oxygen mobility and promoted oxygen storage capacity（OSC）. Furthermore, the best performance was found when the molar ratio of CeO2 to ZrO2 was 2:1 for the oxidation of methanol and ethanol. The forward peak current density of Pt-MOx/C（M=Ce, Zr, Ce:Zr=2:1） towards the methanol electrooxidation was about 3.8 times that of Pt-CeO2/C. Pt-MOx/C（M=Ce, Zr） appeared to be a promising and less expensive methanol oxidation anode catalyst.
王青春1,2，刘振朋2，安胜利1,2，王瑞芬1,2，王艳玲3，徐拓2
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing2. School of Material and Metallurgy, Inner Mongolia University of Science and Technology3. Wesleyan College of Guangzhou University
摘 要：The electrocatalytic activity and stability of Pt/C catalyst modified by using CeO2-ZrO2 mixed oxides for the alcohols electrochemical oxidation as probes were investigated. The catalyst samples were characterized by X-ray diffraction（XRD） and scanning electron microscopy（SEM）. The electrochemical properties were measured by a three electrode system on electrochemical workstation（IVIUM）. The results showed that the presence of CeO2-ZrO2 might be associated with the presence of Pt, which indicated that possibly there was synergistic effect between CeO2-ZrO2 and Pt nanoparticles. The electrocatalytic activity and stability of Pt-MOx/C（M=Ce, Zr） for methanol and ethanol oxidation was better than that of Pt-CeO2/C, which was attributed to that CeO2-ZrO2 composited oxides enhanced oxygen mobility and promoted oxygen storage capacity（OSC）. Furthermore, the best performance was found when the molar ratio of CeO2 to ZrO2 was 2:1 for the oxidation of methanol and ethanol. The forward peak current density of Pt-MOx/C（M=Ce, Zr, Ce:Zr=2:1） towards the methanol electrooxidation was about 3.8 times that of Pt-CeO2/C. Pt-MOx/C（M=Ce, Zr） appeared to be a promising and less expensive methanol oxidation anode catalyst.
关键词：
