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

被引：0

作者：

Yang J. ^{[1
,2
,3
]}

Chen P.-Y. ^{[1
]}

Dai J. ^{[1
,2
]}

Rong L.-Q. ^{[1
]}

Wang D.-Z. ^{[1
]}

机构：

[1] School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo

[2] State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Jiaozuo

[3] School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo

来源：

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2022年 / 50卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Co[!sub]3[!/sub]O[!sub]4[!/sub; Methane; Methanol; Tungsten oxide; Visible light catalysis;

D O I：

10.19906/j.cnki.JFCT.2021086

中图分类号：

学科分类号：

摘要：

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. Copyright ©2022 Editorial Dept. of Journal of Fuel Chemistry and Technology. All rights reserved.

引用

页码：464 / 473

页数：9

共 42 条

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