Synthesis of Co3O4/WO3 composite catalysts for visible-light-driven conversion of methane to methanol

YANG Juan; CHEN Peng-yu; DAI Jun; RONG Li-qing; WANG Da-zhao

doi:10.19906/j.cnki.JFCT.2021086

Volume 50 Issue 4

Apr. 2022

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Article Navigation > Journal of Fuel Chemistry and Technology > 2022 > 50(4): 464-473

YANG Juan, CHEN Peng-yu, DAI Jun, RONG Li-qing, WANG Da-zhao. Synthesis of Co3O4/WO3 composite catalysts for visible-light-driven conversion of methane to methanol[J]. Journal of Fuel Chemistry and Technology, 2022, 50(4): 464-473. doi: 10.19906/j.cnki.JFCT.2021086

Citation:

YANG Juan, CHEN Peng-yu, DAI Jun, RONG Li-qing, WANG Da-zhao. Synthesis of Co₃O₄/WO₃ composite catalysts for visible-light-driven conversion of methane to methanol[J]. Journal of Fuel Chemistry and Technology, 2022, 50(4): 464-473. doi: 10.19906/j.cnki.JFCT.2021086

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Synthesis of Co₃O₄/WO₃ composite catalysts for visible-light-driven conversion of methane to methanol

doi: 10.19906/j.cnki.JFCT.2021086

YANG Juan^{1, 2, 3},
CHEN Peng-yu¹,
DAI Jun^{1, 2
,
,},
RONG Li-qing¹,
WANG Da-zhao¹

1.
School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
2.
State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Jiaozuo 454003, China
3.
School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, China

Funds: The project was supported by the National Natural Science Foundation of China (52074103), the Natural Science Foundation of Henan Province (202300410181) and Key Scientific Research Foundation of Education Department of Henan Province (21A440008).

Received Date: 2021-08-18
Rev Recd Date: 2021-09-27

Available Online: 2021-11-25

Publish Date: 2022-04-26

Abstract

Abstract

Direct and selective conversion of methane to methanol under mild conditions still faces grand challenges. In this study, Co₃O₄/WO₃ nanocomposite catalysts were synthesized by facile hydrothermal method, combining with surface impregnation process. The structural composition and micro morphology of Co₃O₄/WO₃ composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and UV-visible absorption spectrum. The catalytic performance of Co₃O₄/WO₃ on the conversion of methane to methanol was investigated under visible light illumination at room temperature. The results show that incorporating Co₃O₄ can remarkably improve the photocatalytic performance of methane conversion. The optimal catalyst 3.0% Co₃O₄/WO₃ exhibits a methane conversion of 2041 μmol/g after visible light irradiation for 2 h, and the according methanol productivity and selectivity reach 1194 μmol/g and 58.5%, which are 4.03 and 2.39 times of single WO₃ respectively. This performance is superior to most reported heterogeneous photocatalysts for methane conversion, meanwhile possessing excellent cyclic stability. Combining the results of transient photocurrent and electron paramagnetic resonance (EPR) with the catalytic activity, the intrinsic mechanism of enhanced methane conversion via introducing Co₃O₄ is revealed, which is of theoretical significance to design light-driven catalysts for methane conversion to methanol.
- methane,
- visible light catalysis,
- methanol,
- tungsten oxide,
- Co₃O₄

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References(42)

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