SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2021, Vol. 29 ›› Issue (1): 176-182.DOI: 10.1016/j.cjche.2020.05.009

• Catalysis, Kinetics and Reaction Engineering • Previous Articles     Next Articles

Density functional theory and kinetic Monte Carlo simulation study the strong metal-support interaction of dry reforming of methane reaction over Ni based catalysts

Xueyan Zou1, Xiaodong Li2, Xiaoyu Gao1, Zhihua Gao1, Zhijun Zuo1, Wei Huang1   

  1. 1 Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China;
    2 College of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030619, China
  • Received:2020-03-02 Revised:2020-04-12 Online:2021-04-02 Published:2021-01-28
  • Contact: Zhijun Zuo, Wei Huang
  • Supported by:
    The authors would like to thank the National Natural Science Foundation of China (21776197 and 21776195), Shanxi Province Science Foundation for Youths (201701D211003) and Key Research and Development Program of Shanxi Province (International Cooperation, 201903D421074) for their financial support.

Density functional theory and kinetic Monte Carlo simulation study the strong metal-support interaction of dry reforming of methane reaction over Ni based catalysts

Xueyan Zou1, Xiaodong Li2, Xiaoyu Gao1, Zhihua Gao1, Zhijun Zuo1, Wei Huang1   

  1. 1 Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China;
    2 College of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030619, China
  • 通讯作者: Zhijun Zuo, Wei Huang
  • 基金资助:
    The authors would like to thank the National Natural Science Foundation of China (21776197 and 21776195), Shanxi Province Science Foundation for Youths (201701D211003) and Key Research and Development Program of Shanxi Province (International Cooperation, 201903D421074) for their financial support.

Abstract: Oxide supports modify electronic structures of supported metal nanoparticles, and then affect the catalytic activity associated with the so-called strong metal-support interaction (SMSI). We herein report the strong influence of SMSI employing Ni4/α-MoC(111) and defective Ni4/MgO(100) catalysts used for dry reforming of methane (DRM, CO2 + CH4 → 2CO + 2H2) by using density functional theory (DFT) and kinetic Monte Carlo simulation (KMC). The results show that α-MoC(111) and MgO(100) surface have converse electron and structural effect for Ni4 cluster. The electrons transfer from α-MoC(111) surface to Ni atoms, but electrons transfer from Ni atoms to MgO(100) surface; an extensive tensile strain is greatly released in the Ni lattice by MgO, but the extensive tensile strain is introduced in the Ni lattice by α-MoC. As a result, although both catalysts show good stability, H2/CO ratio on Ni4/α-MoC(111) is obviously larger than that on Ni4/MgO(100). The result shows that Ni/α-MoC is a good catalyst for DRM reaction comparing with Ni/MgO catalyst.

Key words: DRM, MgO, Ni, α-MoC, SMSI

摘要: Oxide supports modify electronic structures of supported metal nanoparticles, and then affect the catalytic activity associated with the so-called strong metal-support interaction (SMSI). We herein report the strong influence of SMSI employing Ni4/α-MoC(111) and defective Ni4/MgO(100) catalysts used for dry reforming of methane (DRM, CO2 + CH4 → 2CO + 2H2) by using density functional theory (DFT) and kinetic Monte Carlo simulation (KMC). The results show that α-MoC(111) and MgO(100) surface have converse electron and structural effect for Ni4 cluster. The electrons transfer from α-MoC(111) surface to Ni atoms, but electrons transfer from Ni atoms to MgO(100) surface; an extensive tensile strain is greatly released in the Ni lattice by MgO, but the extensive tensile strain is introduced in the Ni lattice by α-MoC. As a result, although both catalysts show good stability, H2/CO ratio on Ni4/α-MoC(111) is obviously larger than that on Ni4/MgO(100). The result shows that Ni/α-MoC is a good catalyst for DRM reaction comparing with Ni/MgO catalyst.

关键词: DRM, MgO, Ni, α-MoC, SMSI