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CO 2 hydrogenation over differently morphological CeO 2 ‐supported Cu‐Ni catalysts
Author(s) -
Tan Qingqing,
Shi Zhisheng,
Wu Dongfang
Publication year - 2019
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4636
Subject(s) - catalysis , nanorod , materials science , oxygen , nanoparticle , methanol , chemical engineering , alloy , inorganic chemistry , nanotechnology , chemistry , metallurgy , organic chemistry , biochemistry , engineering
Summary Differently morphological CeO 2 ‐supported Cu‐Ni catalysts utilized for carbon dioxide hydrogenation to methanol were prepared by the method of impregnation. The 100‐ to 300‐nm CeO 2 nanorod‐supported catalyst dominantly exposed low‐energy (100) and (110) facets, and the Cu‐Ni supported on 10‐ to 20‐nm CeO 2 nanospheres and on irregular CeO 2 nanoparticles were both enclosed by (111) facets owning high energy. Besides, all CeO 2 ‐supported Cu‐Ni catalysts possess oxygen vacancies, which can active and absorb CO 2 and is further beneficial for the reaction. Most oxygen vacancies were generated from the Ce 4+ reduction to Ce 3+ with the ceria lattice cell expansion, and small amount of oxygen vacancies resulted from the Ce 4+ replacement by Cu or/and Ni atom. Because of the exposed (100) and (110) facets and numerous oxygen vacancies, well‐defined CeO 2 nanorod‐supported Cu‐Ni alloy showed more superior catalytic performance than on CeO 2 nanospheres and nanoparticles.