Pd/TiO2/C复合催化剂的制备及其在碱性溶液中对乙醇氧化的电催化性能

doi:10.13208/j.electrochem.120929

电化学（中英文） ›› 2014, Vol. 20 ›› Issue (1): 85-88. doi: 10.13208/j.electrochem.120929

Pd/TiO₂/C复合催化剂的制备及其在碱性溶液中对乙醇氧化的电催化性能

李巧霞^*，杨意超，刘明爽，毛宏敏，徐群杰

上海电力学院上海高校电力腐蚀控制与应用电化学重点实验室，上海 200090

收稿日期:2012-09-29 修回日期:2013-01-21 出版日期:2014-02-25 发布日期:2014-02-24
通讯作者: 李巧霞 E-mail:liqiaoxia@shiep.edu.cn
基金资助:
国家自然科学基金项目（No. 21103107）和上海市科委能力建设项目（No. 10160502300）资助

Preparation of Pd/TiO₂/C Catalyst and Its Electrocatalytic Performance in Basic Solution for Ethanol Oxidation

LI Qiao-xia^*, YANG Yi-chao, LIU Ming-shuang, MAO Hong-min, XU Qun-jie

Key laboratory of Shanghai Colleges and Universities for Electric Power Corrosion Control and Applied Electrochemistry, Shanghai University of Electric Power, Shanghai 200090, China

Received:2012-09-29 Revised:2013-01-21 Published:2014-02-25 Online:2014-02-24
Contact: LI Qiao-xia E-mail:liqiaoxia@shiep.edu.cn

摘要/Abstract

摘要： 钛酸四丁酯前驱体水热合成制备纳米TiO₂颗粒，在TiO₂和Vulcan XC-72活性炭复合载体上液相还原负载Pd纳米颗粒，制得Pd/TiO₂/C复合催化剂. 通过透射电镜（TEM）和X射线衍射（XRD）测试表明其具有面心立方结构，Pd金属粒子（粒径约3 ~ 4 nm）均匀分散在锐钛矿型的纳米TiO₂和活性炭的复合载体上. 循环伏安和计时电流曲线测试表明，与相同Pd载量的Pd/C相比，20% Pd载量的Pd/TiO₂/C颗粒在常温常压下对乙醇的电催化氧化有很高活性和稳定性. 这主要归功于纳米TiO₂改变了Pd表面的电子特性，且增大了其比表面积.

关键词: 燃料电池, Pd/TiO₂/C, 乙醇氧化, 碱性溶液

Abstract: Nanoparticles TiO₂ were prepared by hydrothermal method using precursor tetrabutyl titanate. The Pd/TiO₂/C catalyst was synthesized by liquid phase reducing method supported on nano TiO₂ and Vulcan carbon XC-72. The Pd/TiO₂/C catalyst was characterized by XRD, TEM, cyclic voltammetry, and chronopotentiometry. XRD confirmed the face-centered cubic structure of Pd particles, and TEM indicated that Pd particles (size 3 ~ 4 nm) dispersed uniformly on TiO₂ and carbon XC-72. The results from cyclic voltammogram and chronopotentiogram showed the higher ethanol oxidation activity and stability of Pd/TiO₂/C catalyst (20% Pd) as compared with those of Pd/C catalyst at ambient temperature and pressure in alkaline media. The improved properties in Pd/TiO₂/C catalyst (20% Pd) might mainly due to the presence of TiO₂ nanoparticles which changed the electron properties on Pd surface and increased the electrochemical surface area.

Key words: fuel cell, Pd/TiO2/C, ethanol oxidation, basic solution

中图分类号:

O646

李巧霞, 杨意超, 刘明爽, 毛宏敏, 徐群杰. Pd/TiO₂/C复合催化剂的制备及其在碱性溶液中对乙醇氧化的电催化性能[J]. 电化学（中英文）, 2014, 20(1): 85-88.

LI Qiao-xia, YANG Yi-chao, LIU Ming-shuang, MAO Hong-min, XU Qun-jie. Preparation of Pd/TiO₂/C Catalyst and Its Electrocatalytic Performance in Basic Solution for Ethanol Oxidation[J]. Journal of Electrochemistry, 2014, 20(1): 85-88.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.120929

https://electrochem.xmu.edu.cn/CN/Y2014/V20/I1/85

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Pd/TiO₂/C复合催化剂的制备及其在碱性溶液中对乙醇氧化的电催化性能

Preparation of Pd/TiO₂/C Catalyst and Its Electrocatalytic Performance in Basic Solution for Ethanol Oxidation

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