能源化学(英文版) ›› 2019, Vol. 38 ›› Issue (11): 41-49.DOI: 10.1016/j.jechem.2018.12.024

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Transition metal nanoparticles supported La-promoted MgO as catalysts for hydrogen production via catalytic decomposition of ammonia

Xiu-Cui Hua, Wei-Wei Wanga, Zhao Jina, Xu Wangb, Rui Sib, Chun-Jiang Jiaa   

  1. a Key Laboratory for Colloid and Interface Chemistry, Key Laboratory of Special Aggregated Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, Shandong, China;
    b Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
  • 收稿日期:2018-10-31 修回日期:2018-12-29 出版日期:2019-11-15 发布日期:2020-12-18
  • 通讯作者: Wei-Wei Wang, wangww@sdu.edu.cn; Chun-Jiang Jia, jiacj@sdu.edu.cn
  • 基金资助:
    Financial supported from the Excellent Young Scientists Fund from the National Natural Science Foundation of China (NSFC) (Grant no. 21622106), other projects from the NSFC (Grant nos. 21773288, 21805167 and 21771117), the Outstanding Scholar Fund (Grant no. JQ201703) and the Doctoral Fund (Grant no. ZR2018BB010) from the Science Foundation of Shandong Province of China, the Taishan Scholar Project of Shandong Province of China, the Hundred Talents project of the Chinese Academy of Sciences and the Foundation of State Key Laboratory of Coal Conversion (grant nos. J17-18-902). We thank the Center of Structural Characterization and Property Measurements at Shandong University for the help on sample characterizations.

Transition metal nanoparticles supported La-promoted MgO as catalysts for hydrogen production via catalytic decomposition of ammonia

Xiu-Cui Hua, Wei-Wei Wanga, Zhao Jina, Xu Wangb, Rui Sib, Chun-Jiang Jiaa   

  1. a Key Laboratory for Colloid and Interface Chemistry, Key Laboratory of Special Aggregated Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, Shandong, China;
    b Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
  • Received:2018-10-31 Revised:2018-12-29 Online:2019-11-15 Published:2020-12-18
  • Contact: Wei-Wei Wang, wangww@sdu.edu.cn; Chun-Jiang Jia, jiacj@sdu.edu.cn
  • Supported by:
    Financial supported from the Excellent Young Scientists Fund from the National Natural Science Foundation of China (NSFC) (Grant no. 21622106), other projects from the NSFC (Grant nos. 21773288, 21805167 and 21771117), the Outstanding Scholar Fund (Grant no. JQ201703) and the Doctoral Fund (Grant no. ZR2018BB010) from the Science Foundation of Shandong Province of China, the Taishan Scholar Project of Shandong Province of China, the Hundred Talents project of the Chinese Academy of Sciences and the Foundation of State Key Laboratory of Coal Conversion (grant nos. J17-18-902). We thank the Center of Structural Characterization and Property Measurements at Shandong University for the help on sample characterizations.

摘要: The uniformly dispersed transition metal (Co, Ni and Fe) nanoparticles supported on the surface of La-promoted MgO were prepared via a deposition-precipitation method for hydrogen production from catalytic decomposition of ammonia. X-ray diffraction, N2 adsorption-desorption, transmission electron microscopy, temperature-programmed reduction and temperature-programmed desorption were used to investigate the structure-activity relation of catalysts in NH3 decomposition. The results show that the strong interaction between active species and support can effectively prevent the active species from agglomerating during ammonia decomposition reaction. In addition, the introduction of La species not only facilitates the adsorption and decomposition of NH3 and desorption of N2, but also benefits the better dispersion of the active species. The prepared catalysts showed very high catalytic activity for ammonia decomposition compared with the same active composition samples that reported previously. Meanwhile, the catalysts showed excellent high-temperature stability and no any deactivation was observed, which are very promising candidates for the decomposition of ammonia to hydrogen.

关键词: Transition metal nanoparticles, MgO support, Ammonia decomposition, High activity, Hydrogen, Lanthanum

Abstract: The uniformly dispersed transition metal (Co, Ni and Fe) nanoparticles supported on the surface of La-promoted MgO were prepared via a deposition-precipitation method for hydrogen production from catalytic decomposition of ammonia. X-ray diffraction, N2 adsorption-desorption, transmission electron microscopy, temperature-programmed reduction and temperature-programmed desorption were used to investigate the structure-activity relation of catalysts in NH3 decomposition. The results show that the strong interaction between active species and support can effectively prevent the active species from agglomerating during ammonia decomposition reaction. In addition, the introduction of La species not only facilitates the adsorption and decomposition of NH3 and desorption of N2, but also benefits the better dispersion of the active species. The prepared catalysts showed very high catalytic activity for ammonia decomposition compared with the same active composition samples that reported previously. Meanwhile, the catalysts showed excellent high-temperature stability and no any deactivation was observed, which are very promising candidates for the decomposition of ammonia to hydrogen.

Key words: Transition metal nanoparticles, MgO support, Ammonia decomposition, High activity, Hydrogen, Lanthanum