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研究论文

PdNiO/C在碱性介质中对甲醇的电氧化

  • 王美丽 ,
  • 桑林 ,
  • 黄成德
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  • 天津大学化工学院,天津大学化工学院,天津大学化工学院 天津300072,天津300072,天津300072

收稿日期: 2007-11-28

  修回日期: 2007-11-28

  网络出版日期: 2007-11-28

EIectro-Oxidation of Methanol on PdNiO/C Catalyst in Alkaline Medium

  • WANG Mei-li ,
  • SANG Lin ,
  • HUANG Cheng-de
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  • (School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China

Received date: 2007-11-28

  Revised date: 2007-11-28

  Online published: 2007-11-28

摘要

应用循环伏安,计时电流,计时电位和XRD等方法研究了碱性介质中甲醇在自制PdNiO/C和Pd/C催化剂上的电化学氧化以及高温热处理对催化剂结构和性能的影响.结果表明,还原温度为70℃,Pd、Ni原子比为8∶2时,PdNiO/C催化剂对甲醇电化学氧化具有较好的催化活性.热处理可增大催化剂粒径,升高结晶度,降低分散度和催化活性,并且可使NiO从Pd的晶格中脱离出来.与Pd/C催化剂相比,优选的PdNiO/C催化剂有更高的催化活性和更好的抗毒化能力.

本文引用格式

王美丽 , 桑林 , 黄成德 . PdNiO/C在碱性介质中对甲醇的电氧化[J]. 电化学, 2007 , 13(4) : 377 -381 . DOI: 10.61558/2993-074X.1837

Abstract

The electro-oxidation of methanol in alkaline electrolyte at in-house synthesized PdNiO/C and Pd/C catalysts and the effect of heat treatment on the structure and performance of catalysts were studied by cyclic voltammetry,chronoamperometry,chronopotentiometry and X-ray diffraction methods.It is shown that when the reduction temperature is 70℃ and the ratio between Pd and Ni is 8∶2,The PdNiO/C catalyst presents a highest activity for methanol electrooxidation.Calcining can increase the particle size and crystallinity of catalysts,but decrease the dispersion and activity of catalysts, too.Besides,the NiO is disengaged from Pd lattice by heat-treatment.The optimal PdNiO/C catalyst shows higher catalytic activity and much better poisoning resistance than the Pd/C catalyst.

参考文献

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