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首页> 外文期刊>International journal of hydrogen energy >Synthesis of Pd/TiO2-C composite catalysts and investigation of its performance for the electrooxidation of formic acid
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Synthesis of Pd/TiO2-C composite catalysts and investigation of its performance for the electrooxidation of formic acid

机译：Pd / TiO2-C复合催化剂的合成及其对甲酸的电氧化性能研究

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摘要

In this work, anatase-TiO2 is investigated as a catalyst support in Pd/TiO2-C composite to improve the electrocatalytic properties of Pd for formic acid oxidation reaction (FAOR). Pd/TiO2 has been synthesized by an impregnation-reduction method and then mixed with Vulcan XC-72R carbon black to obtain Pd/TiO2-C composite. Transmission electron microscopy (TEM) images show Pd nanoparticles (ca.3.5 nm in average diameter) in the Pd/TiO2-C (1:1) composite catalyst were dispersed on the surface of TiO2 with a narrow particle size distribution. Electrochemical tests demonstrate Pd/TiO2-C (1:1) composite has significantly increased catalytic activity and stability compared with Pd/C for FAOR. The proposed reasons for these observations are the excellent acid corrosion and oxidation resistance of TiO2 and the synergistic effect of Pd and TiO2 nanoparticles. The effect of mass ratios of TiO2 to C on the catalytic performance is also discussed. The best catalytic activity and stability for FAOR is found when the mass ratio of TiO2 to C is 1:1. It can be interpreted as the synergistic effects and conductivity reach balance at this point. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
机译：在这项工作中，研究了锐钛矿型TiO2作为Pd / TiO2-C复合材料的催化剂载体，以改善Pd对甲酸氧化反应（FAOR）的电催化性能。通过浸渍-还原法合成Pd / TiO2，然后与Vulcan XC-72R炭黑混合，得到Pd / TiO2-C复合材料。透射电子显微镜（TEM）图像显示Pd / TiO2-C（1：1）复合催化剂中的Pd纳米颗粒（平均直径约3.5 nm）分散在TiO2的表面上，粒径分布较窄。电化学测试表明，与FAOR的Pd / C相比，Pd / TiO2-C（1：1）复合材料具有显着提高的催化活性和稳定性。提出这些观察结果的原因是TiO2优异的耐酸腐蚀性和抗氧化性以及Pd和TiO2纳米颗粒的协同作用。还讨论了TiO2与C的质量比对催化性能的影响。当TiO2与C的质量比为1：1时，发现对于FAOR具有最佳的催化活性和稳定性。这可以解释为协同效应和电导率在此时达到平衡。 Hydrogen Energy Publications，LLC版权所有（C）2015。由Elsevier Ltd.出版。保留所有权利。

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  • 来源
    《International journal of hydrogen energy》 |2015年第41期|14179-14186|共8页
  • 作者

    Wan Hansheng; Dong Qizhi; Zhu Guiming; Yu Gang; Yin Tianwu; Huang Meiling;

  • 作者单位

    Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China;

    Xiangyang Vocat & Tech Coll, Xiangyang 441021, Hubei Province, Peoples R China;

    Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Formic acid fuel cells; Anatase-TiO2; Corrosion resistance support; Palladium; Electrooxidation;

    机译：甲酸燃料电池;锐钛型TiO2;耐腐蚀载体;钯;电氧化;

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