铁系元素掺杂的Pt基疏水催化剂的制备及活性研究

doi:10.3724/SP.J.1077.2011.00091

无机材料学报 ›› 2011, Vol. 26 ›› Issue (1): 91-96.DOI: 10.3724/SP.J.1077.2011.00091 CSTR: 32189.14.SP.J.1077.2011.00091

铁系元素掺杂的Pt基疏水催化剂的制备及活性研究

熊亮萍, 胡胜, 侯京伟, 翁葵萍, 罗阳明, 杨通在

中国工程物理研究院核物理与化学研究所, 绵阳 621900

收稿日期:2010-04-09 修回日期:2010-05-21 出版日期:2011-01-20 网络出版日期:2010-12-23
作者简介:熊亮萍(1981-), 女, 硕士, 助理研究员. E-mail: pinger1981@mail.ustc.edu
基金资助:
国家自然科学基金(20901071); 国家磁约束核聚变能研究专项(2010GB112004)

Preparation and Catalytic activity of Pt Based Hydrophobic Catalysts Adulterated with Fe Series Elements

XIONG Liang-Ping, HU Sheng, HOU Jing-Wei, WENG Kui-Ping, LUO Yang-Ming, YANG Tong-Zai

Preparation and Catalytic Activity of PtBased Hydrophobic Catalysts Adulterated with Fe Series ElementsXIONG Liang-Ping, HU Sheng, HOU Jing-Wei, WENG Kui-Ping,LUO Yang-Ming, YANG Tong-ZaiInstituteof Nuclear Physics and Chemistry, China Academy of Engineering Physics,Mianyang 621900, China

Received:2010-04-09 Revised:2010-05-21 Published:2011-01-20 Online:2010-12-23
Supported by:
National Natural Science Foundation of China(20901071); National Special Fund for Magnetically Confined Nuclear Fusion Energy(2010GB112004)

摘要/Abstract

摘要： 以炭黑为载体、乙二醇为溶剂, 利用高压微波加热法分别制备了铁系元素(即Fe、Co、Ni三种元素)掺杂的Pt基二元催化剂. 采用TEM、XRD、EDX、XPS等手段分析了催化剂的微观结构. 活性金属粒子在炭黑载体表面分布均匀; Fe、Co、Ni掺杂后, 催化剂中活性金属粒子的粒径分布变窄, 平均粒径明显减小(由4.57nm分别降低至2.17、2.41、2.55nm); 催化剂中Pt存在Pt(0)、Pt(II)、Pt(IV)三种价态. 将催化剂分散于聚四氟乙烯乳液中, 采用自然浸渍法负载于泡沫镍, 制得Pt基疏水催化剂, 考查了其对氢-水液相交换反应的催化活性. 与单一Pt基疏水催化剂相比, 过渡金属掺杂后的二元疏水催化剂对氢-水液相交换反应的催化活性明显提高. 其催化活性由高到低依次为: PtFe/C/FN>PtCo/C/FN>PtNi/C/FN>Pt/C/FN. 催化活性的提高可能主要来源于催化剂活性金属粒径的减小. 此外, H₂O分子在Fe系元素表面的解离行为也有一定的贡献.

关键词: 铁系元素, Pt基二元疏水催化剂, 氢-水液相催化交换, 催化活性

Abstract: Pt based binary catalysts, which were adulterated with Feseries elements, viz Fe, Co, and Ni,were prepared using microwave heating method, with carbon black as carrier andglycol as solvent. Microstructure of the catalysts was characterized by TEM, XRD, EDX and XPS. Results showed that active metal particles wereevenly distributed on carrier’s surface. After adulterated by Fe, Co, Ni, thedistribution of active metal particles’ size became narrower and average sizedecreased from 4.57nm to 2.17nm, 2.41nm, 2.55nm, respectively. The catalystswere loaded on foam nickel (FN) with polytetrafluoroethylene latex to obtain Ptbased hydrophobic catalysts, and then their activity for hydrogen-water liquidphase catalytic exchange (LPCE) was tested. Compared with Pt/C/FN hydrophobiccatalyst, the catalytic activity of Pt based binary hydrophobic catalystsadulterated with transition metals increased in evidence. The sequence of thesecatalysts’ activity was as follows, PtFe/C/FN>PtCo/C/FN> PtNi/C/FN>Pt/C/FN. The increase of catalytic activity results from the decrease ofactive metals particles’ size, moreover, it could be attributed to thedissociation property of water on Fe series metals’ surface to some extent.

Key words: Fe series elements, Pt based binaryhydrophobic catalyst, hydrogen-water liquid phase catalytic exchange, catalytic activity

中图分类号:

O614

熊亮萍, 胡胜, 侯京伟, 翁葵萍, 罗阳明, 杨通在. 铁系元素掺杂的Pt基疏水催化剂的制备及活性研究[J]. 无机材料学报, 2011, 26(1): 91-96.

XIONG Liang-Ping, HU Sheng, HOU Jing-Wei, WENG Kui-Ping, LUO Yang-Ming, YANG Tong-Zai. Preparation and Catalytic activity of Pt Based Hydrophobic Catalysts Adulterated with Fe Series Elements[J]. Journal of Inorganic Materials, 2011, 26(1): 91-96.

参考文献

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铁系元素掺杂的Pt基疏水催化剂的制备及活性研究

Preparation and Catalytic activity of Pt Based Hydrophobic Catalysts Adulterated with Fe Series Elements

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