期刊
JOURNAL OF CATALYSIS
卷 267, 期 1, 页码 24-29出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2009.07.009
关键词
Cu/ZnO; Nanostructured catalysts; Methanol synthesis; Catalyst preparation; Precursor chemistry
资金
- German Federal Ministry of Education and Research [BMBF, FKZ 01RI0529]
A concept is presented, which helps to rationalize the success of the industrially applied preparation route for Cu/ZnO/(Al2O3) catalysts. Many studies can be found in the open literature, which describe the critical dependency of the final catalyst's properties on precursor chemistry. In line with previous reports, this concept identifies zincian malachite as the relevant precursor phase and includes a simple relation of precursor crystal structure and final Cu surface area. It comprises two hierarchical microstructure-directing effects, for which particle morphology and degree of Cu2+ substitution by Zn2+ in the zincian malachite phase are the key properties: (i) meso-structuring of the precursor phase upon ageing of the co-precipitate in the mother liquor and (ii) nano-structuring of the oxide phase upon decomposition. Consequences for further optimization of the Cu, Zn, Al system are discussed. (C) 2009 Elsevier Inc. All rights reserved.
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