以KMnO4改性炭黑为载体的Pd-Ni催化剂的制备和性能
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:


Preparation and Properties of Pd-Ni Catalysts Supported by Carbon Black Modified with KMnO4
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    以不同浓度的KMnO4溶液预处理的炭黑为载体,通过沉淀共还原法合成了3种Pd1Ni1/ACx (x=3,5,7)催化剂,并将3种催化剂与商业Pd/C催化剂进行了性能对比。用XPS、ICP、XRD和TEM对催化剂了进行表征。结果表明:Pd1Ni1/AC5的Pd负载量(质量分数,下同)最大(3.66%),Pd晶粒的平均粒径最小(4.71 nm),且均匀地分布在KMnO4氧化处理后的碳载体上,活性位点较多;XRD显示,3种Pd1Ni1/ACx催化剂中的Ni均以无定形存在。在电化学性能测试中,3种催化剂均表现出比商业Pd/C更好的电化学稳定性和存活率;其中,Pd1Ni1/AC5电化学活性表面积达62.21 m2/gPd,且乙醇催化活性为1797.85 A/gPd。

    Abstract:

    Three kinds of Pd1Ni1/ACx (x=3,5,7) catalysts were synthesized by precipitation co-reduction method with carbon black pretreated with different concentrations of potassium permanganate solution as the carrier, and the best catalysts for electrocatalytic performance were screened. Commercial Pd/C catalyst was as comparison. The physical characterizations (XPS, ICP and TEM) show that Pd1Ni1/AC5 have the largest Pd loading(3.66%) and the smallest average particle size(4.71 nm) of Pd grains which were homogeneously dispersed on carbon black support, so this catalyst has more active sites than the other two; XRD shows that Ni in all three Pd1Ni1/ACx catalysts exist in an amorphous form. In the electrochemical performance test, all three catalysts showed better electrochemical stability and survival than commercial palladium carbon; Pd1Ni1/AC5 had the largest electrochemical active surface area (62.21 m2/gPd) and the best ethanol catalytic activity (1797.85 A/gPd) which is superior to palladium carbon catalyst.

    参考文献
    相似文献
    引证文献
引用本文

赵世怀.以KMnO4改性炭黑为载体的Pd-Ni催化剂的制备和性能[J].精细化工,2019,36(5):

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2018-08-29
  • 最后修改日期:2018-12-30
  • 录用日期:2019-01-02
  • 在线发布日期: 2019-03-28
  • 出版日期: