Activity and stability of Pt catalysts supported on carbon nanotubes, active carbon and 纬-Al₂O₃ for HI decomposition in iodine-sulfur thermochemical cycle

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• 作者：Laijun Wang^a ; ^{wanglaijun@mail.tsinghua.edu.cn} ; Shangkui Bai^b ; ^{shangkuibai@163.com} ; Zhichao Wang^a ; ^{wangzc05@mails.tsinghua.edu.cn} ; Yuling Zhao^a ; ^{zyl1985bb@163.com} ; Xiao Yuan^a ; ^{yingxiu0654@126.com} ; Ping Zhang^a ; ^{zhangping77@mail.tsinghua.edu.cn} ; Songzhe Chen^a ; ^{chenszh@mail.tsinghua.edu.cn} ; Jingming Xu^a ; ^{xujingming@mail.tsinghua.edu.cn} ; Xianghai Meng^b ; ^{meng_xianghai@163.com}
• 关键词：Hydrogen iodide decomposition ; Iodine&ndash ; sulfur cycle ; Thermochemical hydrogen production ; Supported platinum catalysts ; Electroless plating method
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：July, 2012
• 卷：37
• 期：13
• 页码：10020-10027
• 文件大小：1313 K

摘要

Pt catalysts supported on carbon nanotubes (CNT), activated carbon and 纬-Al₂O₃ were prepared by the electroless plating method. For comparison, the CNT supported Pt was also prepared by the traditional impregnation-reduction method. The physical properties, structure, morphology and Pt loadings of the different catalysts were characterized by BET, XRD, TEM and ICP, respectively. The catalytic activity for HI decomposition was investigated in a fixed bed reactor under atmospheric pressure. The results of XRD and the activity evaluation indicated that the Pt/CNT prepared by the electroless plating method had better catalytic performance than that prepared by the impregnation-reduction method. Among the three kinds of supported Pt catalysts by the electroless plating method, the CNT supported Pt catalyst not only showed the highest activity for HI decomposition, but also had the best stability in specific surface area, structure and morphology.