| Cu改性直接甲醇燃料电池Pd/C阴极催化剂的电催化性能 |
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| 引用本文： | 张娜,贾梦秋,王要武,郭建伟,谢晓峰.Cu改性直接甲醇燃料电池Pd/C阴极催化剂的电催化性能[J].北京化工大学学报(自然科学版),2010,37(1):68-72. |
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| 作者姓名： | 张娜 贾梦秋 王要武 郭建伟 谢晓峰 |
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| 作者单位： | 1. 北京化工大学 材料科学与工程学院, 北京 100029;2. 清华大学 核能与新能源技术研究院, 北京100084 |
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| 基金项目： | 国家自然科学基金(50873050);;国家“863”计划(2007AA05Z146/2007AA05Z150) |
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| 摘 要： | 用铜做掺杂元素,采用浸渍法以活性炭为载体制备了贵金属载量为20%的Pd-Cu/C系列直接甲醇燃料电池阴极催化剂,比较了4种不同Cu含量催化剂的电催化性能。采用ICP和X射线衍射分析了催化剂中金属元素的比例以及Cu掺杂对Pd/C催化剂晶体结构的影响。结果表明:催化剂中Pd与Cu的物质的量之比与预设值相近,Pd和Cu基本被全部还原;Pd-Cu/C催化剂为面心立方结构,元素铜的加入使催化剂的Pd-Pd间距缩小,从而HO2 ads和OO键能更好地吸附在催化剂金属表面;当采用NaBH4为还原剂,Pd与Cu物质的量比为3∶1时,催化剂(Pd3Cu/C)的平均粒径为3.4 nm,催化剂的催化性能最好,电化学活性表面积EAS达到38.9m2/gPd,电化学性能较Pd/C催化剂有很大提高,接近Pt/C商用催化剂。
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| 关 键 词： | 直接甲醇燃料电池 Pd-Cu/C催化剂 电催化 |
| 收稿时间： | 2009-04-20 |
Electrocatalytic characterisics of copper modification of Pd/C cathode catalysts for use in direct methanol fuel cells |
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| ZHANG Na,JIA MengQiu,WANG YaoWu,GUO JianWei,XIE XiaoFeng.Electrocatalytic characterisics of copper modification of Pd/C cathode catalysts for use in direct methanol fuel cells[J].Journal of Beijing University of Chemical Technology,2010,37(1):68-72. |
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| Authors: | ZHANG Na JIA MengQiu WANG YaoWu GUO JianWei XIE XiaoFeng |
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| Institution: | 1. College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029;2. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China |
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| Abstract: | A series of carbon-supported 20% Pd-Cu/C catalysts for use in direct methanol fuel cells(DMFC) have been prepared by an impregnation method.The electrocatalytic characteristics of the catalysts with different contents of Cu were compared.The effects of Cu on the crystal structure and the elemental states in the catalysts were investigated by XRD and ICP.The results show that the catalysts had been completely reduced,and the molar ratio of Pd to Cu in the catalysts accorded well with the quantities added.The... |
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| Keywords: | direct methanol fuel cell Pd-Cu/C catalysts electro-catalysis |
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