Controlling the Reconstruction of Ni/CeO2 Catalyst during Reduction for Enhanced CO Methanation
Xinyu Cao,
Tiancheng Pu,
Bar Mosevitzky Lis,
Israel E. Wachs,
Chong Peng,
Minghui Zhu,
Yongkang Hu
Affiliations
Xinyu Cao
State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
Tiancheng Pu
State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; Operando Molecular Spectroscopy and Catalysis Research Laboratory, Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA 18015, USA
Bar Mosevitzky Lis
Operando Molecular Spectroscopy and Catalysis Research Laboratory, Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA 18015, USA
Israel E. Wachs
Operando Molecular Spectroscopy and Catalysis Research Laboratory, Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA 18015, USA
Chong Peng
Department of Instrument Science and Engineering, School of Electronic Information, Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors.
Minghui Zhu
State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; Corresponding authors.
Yongkang Hu
Dalian Research Institute of Petroleum and Petrochemicals, SINOPEC, Dalian 116045, China
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.
