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PdNiO/C在碱性介质中对甲醇的电氧化
引用本文: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.
作者姓名:王美丽  桑林  黄成德
作者单位: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
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.

关 键 词:甲醇  碱性  燃料电池  PdNiO  电化学氧化  
文章编号:1006-3471(2007)04-0377-05
收稿时间:2007-04-16
修稿时间:2007-05-07

EIectro-Oxidation of Methanol on PdNiO/C Catalyst in Alkaline Medium
WANG Mei-li,SANG Lin,HUANG Cheng-de.EIectro-Oxidation of Methanol on PdNiO/C Catalyst in Alkaline Medium[J].Electrochemistry,2007,13(4):377-381.
Authors:WANG Mei-li  SANG Lin  HUANG Cheng-de
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.
Keywords:methanol  alkaline  fuel cell  PdNiO  electrooxidation
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