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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (1): 14016-014016.doi: 10.1088/2058-6272/aa7f27

• 18届全国等离子体科学和技术会议 • 上一篇    下一篇

Hydrogen cold plasma for synthesizing Pd/C catalysts: the effect of support–metal ion interaction

Zhuang LI (李壮)1, Xiuling ZHANG (张秀玲)1, Yuzhuo ZHANG (张玉卓)2, Dongzhi DUAN (段栋之)1 and Lanbo DI (底兰波)1   

  1. 1 College of Physical Science and Technology, Dalian University, Dalian 116622, People’s Republic of China
    2 State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
  • 出版日期:2017-12-04 发布日期:2017-12-07

Hydrogen cold plasma for synthesizing Pd/C catalysts: the effect of support–metal ion interaction

Zhuang LI (李壮)1, Xiuling ZHANG (张秀玲)1, Yuzhuo ZHANG (张玉卓)2, Dongzhi DUAN (段栋之)1 and Lanbo DI (底兰波)1   

  1. 1 College of Physical Science and Technology, Dalian University, Dalian 116622, People’s Republic of China
    2 State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
  • Online:2017-12-04 Published:2017-12-07
  • Supported by:

    This work is supported by National Natural Science Foundation of China (Grant Nos. 11505019, 21673026) and Dalian Youth Science and Technology Project (Grant No.
    2015R089).

Abstract:

It has been found that cold plasma is a facile and environmentally benign method for synthesizing supported metal catalysts, and great efforts have been devoted to enlarging its applications. However, little work has been done to disclose the influence mechanism, which is significant for controllable synthesis. In this work, hydrogen cold plasma was adopted to synthesize a palladium catalyst supported on activated carbon (Pd/C-P) using H2PdCl4 as a Pd precursor followed by calcination in hydrogen gas to remove the chlorine ions. The Pd/C-P catalyst was found to be made of larger Pd nanoparticles showing a decreased migration to the support outer surface than that prepared by the conventional thermal hydrogen reduction method (Pd/C-C). Meanwhile, the pore diameter of the activated carbon support is small (∼4 nm). Therefore, Pd/C-P exhibits lower CO oxidation activity than Pd/C-C. It was proposed that the strong interaction between the activated carbon and PdCl42- , and the enhanced metal–support interaction caused by hydrogen cold plasma reduction made it difficult for Pd nanoparticles to migrate to the support outer surface. The larger-sized Pd nanoparticles for Pd/C-P may be due to the Coulomb interaction resulting in the disturbance of the metal–support interaction. This work has important guiding significance for the controllable synthesis of supported metal catalysts by hydrogen cold plasma.

Key words: hydrogen cold plasma,  Pd/C, support–metal ion interaction, supported metal catalysts, Coulomb interaction, CO oxidation

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