期刊
JOURNAL OF CATALYSIS
卷 379, 期 -, 页码 147-153出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2019.09.025
关键词
Methanol synthesis; CO2 hydrogenation; CuZnAlZr catalysts; Formaldehyde pre-activation
资金
- National Natural Science Foundation of China [51608061]
- Department of Science and Technology of Sichuan Province [2015JY0113]
- Sichuan Provincial Department of Education [14CZ0020]
Formaldehyde (FA) was introduced into precursor slurries of CuZnAlZr catalysts (CZAZ) from co-precipitation in order to improve its catalytic performance in CO2 hydrogenation to methanol. The obtained CZAZ catalysts with and without FA pre-activation were characterized by X-ray photoelectron spectroscopy, H-2 temperature-programmed reduction, X-ray diffraction, N2O-H-2 titration, N-2 adsorption-desorption, scanning electron microscopy and transmission electron microscope, respectively. The results indicated that FA pre-activation led to Cu2+ reduction to Cu+ in CZAZ precursors. After calcination in N-2 the copper components existed in state of Cu2O, which could provide highly-dispersed active Cu-0 particles with a weak interaction between metal and supports. Meanwhile, FA pre-activation also gave rise to more crystallized semiconductor ZnO phase especially calcination in N-2 at a high temperature. Therefore, the obtained CZAZ catalysts with FA pre-activation on precursor exhibited better catalytic performance in CO2 hydrogenation due to the synergistic effect of Cu-0 particles and crystallized semiconductor ZnO phase. (C) 2019 Elsevier Inc. All rights reserved.
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