扫帚状氧化铈制备及其对Pt基阳极催化剂催化性能的影响
High Specific Area Cerium Oxide: Synthesis and Effect on Catalytic Performance of Pt-Based Catalysts
作者单位E-mail
莫逸杰 内蒙古科技大学材料与冶金学院, 包头 014010
内蒙古自治区先进陶瓷材料与器件重点实验室, 包头 014010 
 
郭瑞华 内蒙古科技大学材料与冶金学院, 包头 014010
内蒙古自治区先进陶瓷材料与器件重点实验室, 包头 014010
上海大学材料科学与工程学院, 上海 200072 
grh7810@163.com 
安胜利 内蒙古科技大学材料与冶金学院, 包头 014010
内蒙古自治区先进陶瓷材料与器件重点实验室, 包头 014010 
 
郭乐乐 内蒙古科技大学材料与冶金学院, 包头 014010
内蒙古自治区先进陶瓷材料与器件重点实验室, 包头 014010 
 
张捷宇 上海大学材料科学与工程学院, 上海 200072  
周国治 上海大学材料科学与工程学院, 上海 200072  
摘要: 采用水热合成法,合成了比表面积为175 m2·g-1,孔径在2~4nm范围内的扫帚状CeO2。通过微波辅助乙二醇还原氯铂酸法制备了Pt-CeO2/RGO催化剂,探究扫帚状CeO2的添加对Pt基催化剂电催化性能的影响。利用X射线衍射仪(XRD)、扫描电镜(SEM)、N2吸附-脱附、X射线光电子能谱(XPS)对所制备的CeO2及催化剂进行表征。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,催化剂中CeO2保持原有扫帚状,Pt纳米粒子均匀分布于石墨烯载体表面;当mRGOmCeO2=1:2时,添加了扫帚状CeO2的Pt-CeO2/RGO催化剂的电催化性能最优,电化学活性表面积为102.83 m2·g-1,对乙醇氧化的峰值电流密度为757.17 A·g-1,1 000 s的稳态电流密度为108.17 A·g-1,对乙醇催化氧化反应的电荷转移电阻最小,活化能最低。
关键词: 直接乙醇燃料电池(DEFC)  阳极催化剂  扫帚状CeO2  催化性能  稳定性
基金项目: 国家自然科学基金(No.51474133,51864040)和内蒙古自治区自然科学基金(No.2018LH02006)资助项目。
Abstract: A broom-like CeO2 with a specific surface area of 175 m2·g-1 and a pore size of 2~4 nm was synthesized by hydrothermal method. The Pt-CeO2/RGO catalyst was prepared by the microwave-assisted ethylene glycol reduction chloroplatinic acid method, and the effect of the addition of broom-like CeO2 on the electrocatalytic performance of Pt-based catalysts was investigated. The prepared CeO2 and catalyst were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 adsorption-desorption, and X-ray photoelectron spectroscopy (XPS). The electrochemical performance of catalysts was tested by electrochemical workstation. The results showed that the CeO2 in the catalyst remains in the form of a broom, and the Pt nanoparticles are evenly distributed on the surface of graphene carrier. When the mass ratio of RGO to CeO2(mRGO:mCeO2) is 1:2, the electrocatalytic performance of the Pt-CeO2/RGO catalyst with broom-like CeO2 is the best, the electrochemical active surface area was 102.83 m2·g-1, the peak current density of ethanol oxidation was 757.17 A·g-1, the steady-state current density of 1 000 s was 108.17 A·g-1, the charge transfer resistance of the catalytic oxidation reaction of ethanol is the smallest and the activation energy is the lowest.
Keywords: direct ethanol fuel cell  anode catalyst  broom-like CeO2  catalytic performance  stability
投稿时间:2018-06-24 修订日期:2018-08-15
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莫逸杰,郭瑞华,安胜利,郭乐乐,张捷宇,周国治.扫帚状氧化铈制备及其对Pt基阳极催化剂催化性能的影响[J].无机化学学报,2018,34(11):1991-1999.
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