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表面富Pd的Ni．Pd／C催化剂的合成及电化学性质研究
  • ISSN号：1006-3471
  • 期刊名称：《电化学》
  • 时间：0
  • 分类：TG171[金属学及工艺—金属表面处理;金属学及工艺—金属学]
  • 作者机构：[1]武汉大学湖北省化学电源重点实验室,化学与分子科学学院,湖北武汉430072, [2]河南理工大学物理化学学院,河南焦作454000
  • 相关基金：国家自然科学基金项目（20973131,50632050）及教育部新世纪优秀人才支持计划项目（NCET-06-0612）资助
作者： 陈玉梅[1,2], 梁志修[1], 陈胜利[1]
关键词： NiPd合金, 核壳结构, 氧还原, 电催化, NiPd alloy, core-shell nanoparticles, oxygen reduction reaction, electocatalysis
中文摘要：

应用改进的多元醇法，分步还原制备表面富Pd的NiPd双元合金催化剂．研究表明：由于Pd较容易还原成核，且与Nj的合金化程度低，Pd难以在Ni颗粒表面实现单层包覆形成Ni@Pd核壳结构，而是近似以单相的低合金化形式存在于Ni颗粒表面，即形成Ni@Pd（Ni）的结构．与Pd／C相比，制备的Ni@Pd（Ni）／C催化剂，其Pd表面的氢吸附峰与吸收峰分辨清晰，含氧化物的脱附峰向正电势移动，氧还原活性显著提高．另外，Ni的存在使Pd的抗甲醇性能明显增强，从而有望作为直接甲醇燃料电池的阴极催化剂．

英文摘要：

The Ni-Pd alloy catalysts with Pd-enriched surface were synthesized through a modified polyol process. The synthesized materials were investigated by XRD and electrochemical methods, and tested as electro- catalysts for CH3OH-tolerant oxygen reduction. The results indicated that the synthesized Ni-Pd nanopartieles possess multiple phases containing Pd-Ni alloy and pure Ni. Comparing with Pd/C, the prepared Ni-Pd/C nano- particles exhibited better resolved voltammetric peaks between the hydrogen absorption and adsorption, and positively shifted current peaks for the reduction of Pd oxide. The prepared Ni-Pd alloys with Pd-enriehed surface have significantly enhanced ORR activity and improved CH3OH tolerance as comparing with Pd/C catalysts.

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期刊信息
  • 《电化学》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学技术协会
  • 主办单位:中国化学会 厦门大学
  • 主编：孙世刚
  • 地址：厦门大学D信箱
  • 邮编：361005
  • 邮箱：dianhx@xmu.edu.cn
  • 电话：0592-2181469
  • 国际标准刊号：ISSN：1006-3471
  • 国内统一刊号：ISSN：35-1172/O6
  • 邮发代号:34-61
  • 获奖情况:
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）
  • 被引量:4569