DFT Study on the Catalytic Role of <inline-formula><tex-math id="M1">\begin{document}$\alpha$\end{document}</tex-math></inline-formula>-MoC(100) in Methanol Steam Reforming

Juan Li; Qiang Wan; Guizhu Lin; Sen Lin

doi:10.1063/1674-0068/cjcp2204075

Volume 35 Issue 4

Aug. 2022

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Juan Li, Qiang Wan, Guizhu Lin, Sen Lin. DFT Study on the Catalytic Role of $\alpha$-MoC(100) in Methanol Steam Reforming[J]. Chinese Journal of Chemical Physics , 2022, 35(4): 639-646. doi: 10.1063/1674-0068/cjcp2204075

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Juan Li, Qiang Wan, Guizhu Lin, Sen Lin. DFT Study on the Catalytic Role of $\alpha$-MoC(100) in Methanol Steam Reforming[J]. Chinese Journal of Chemical Physics , 2022, 35(4): 639-646. doi: 10.1063/1674-0068/cjcp2204075

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DFT Study on the Catalytic Role of $\alpha$-MoC(100) in Methanol Steam Reforming

doi: 10.1063/1674-0068/cjcp2204075

Juan Li^a,
Qiang Wan^a,
Guizhu Lin^{b
,
,},
Sen Lin^{a
,
,}

a.
State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China
b.
Fujian Chuanzheng Communications College, Fuzhou 350007, China

More Information

Corresponding author: Guizhu Lin, E-mail: linguizhu82@163.com; Sen Lin, E-mail: slin@fzu.edu.cn
Received Date: 2022-04-27
Accepted Date: 2022-06-02
Publish Date: 2022-08-27

Abstract

Abstract

In this work, we investigated the methanol steam reforming (MSR) reaction (CH$_3$OH+H$_2$O $\rightarrow$CO$_2$+3H$_2$) catalyzed by $\alpha$-MoC by means of density functional theory calculations. The adsorption behavior of the relevant intermediates and the kinetics of the elementary steps in the MSR reaction are systematically investigated. The results show that, on the $\alpha$-MoC(100) surface, the O$-$H bond cleavage of CH$_3$OH leads to CH$_3$O, which subsequently dehydrogenates to CH$_2$O. Then, the formation of CH$_2$OOH between CH$_2$O and OH is favored over the decomposition to CHO and H. The sequential dehydrogenation of CH$_2$OOH results in a high selectivity for CO$_2$. In contrast, the over-strong adsorption of the CH$_2$O intermediate on the $\alpha$-MoC(111) surface leads to its dehydrogenation to CO product. In addition, we found that OH species, which is produced from the facile water activation, help the O$-$H bond breaking of intermediates by lowering the reaction energy barrier. This work not only reveals the catalytic role played by $\alpha$-MoC(100) in the MSR reaction, but also provides theoretical guidance for the design of $\alpha$-MoC-based catalysts.
- Methanol steam reforming,
- α-MoC,
- Density functional theory,
- Reaction mechanism,
- Selectivity

^† Part of Special Topic "the 1st Young Scientist Symposium on Computational Catalysis".

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References(51)

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