Controlling the Reconstruction of Ni/CeO2 Catalyst during Reduction for Enhanced CO Methanation

被引：0

作者：

Cao X. ^{[1
]}

Pu T. ^{[1
,2
]}

Lis B.M. ^{[2
]}

Wachs I.E. ^{[2
]}

Peng C. ^{[3
]}

Zhu M. ^{[1
]}

Hu Y. ^{[4
]}

机构：

[1] State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai

[2] Operando Molecular Spectroscopy and Catalysis Research Laboratory, Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, 18015, PA

[3] Department of Instrument Science and Engineering, School of Electronic Information, Electrical Engineering, Shanghai Jiao Tong University, Shanghai

[4] Dalian Research Institute of Petroleum and Petrochemicals, SINOPEC, Dalian

来源：

Engineering | 2022年 / 14卷

基金：

中国国家自然科学基金; 上海市自然科学基金;

关键词：

Catalyst activation; Crystallinity; In situ spectroscopy; Methanation; Nickel–ceria catalyst;

D O I：

10.1016/j.eng.2021.08.023

中图分类号：

学科分类号：

摘要：

Reductive pretreatment is an important step for activating supported metal catalysts but has received little attention. In this study, reconstruction of the supported nickel catalyst was found to be sensitive to pretreatment conditions. In contrast to the traditional activation procedure in hydrogen, activating the catalyst in syngas created supported Ni nanoparticles with a polycrystalline structure containing an abundance of grain boundaries. The unique post-activation catalyst structure offered enhanced CO adsorption and an improved CO methanation rate. The current strategy to tune the catalyst structure via manipulating the activation conditions can potentially guide the rational design of other supported metal catalysts. © 2021 THE AUTHORS

引用

页码：94 / 99

页数：5

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