Nanometer Size Copper Particles in Copper Chromite Catalysts Full article
Conference |
Scientific Bases for the Preparation of Heterogeneous Catalysts : 6th International Symposium 05-08 Sep 1994 , Louvain-La-Neuve |
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Source | Preparation of Catalysts VI. Scientific Bases for the Preparation of Heterogeneous Catalysts : Proceedings of the Sixth International Symposium, 5-8 September 1994, Louvain-La-Neuve Compilation, 1995. 1182 c. |
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Journal |
Studies in Surface Science and Catalysis
ISSN: 0167-2991 |
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Output data | Year: 1995, Volume: 91, Pages: 533-537 Pages count : 5 DOI: 10.1016/S0167-2991(06)81791-X | ||
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Abstract:
It is difficult to obtain copper in atomic state on the surface of an oxide catalyst. Therefore, the task of achieving metallic copper with a large surface area becomes crucial. Highly dispersed copper can be obtained on the surface via the reduction of copper-containing oxides. The chapter presents an in situ investigation that highlights that the nature of hydrogen interaction with copper chromite depends on the method of reduction. The treatment of a sample preheated at 450–500°C under H2 led to the formation of cuprous chromite, which decomposed to Cu° and -Cr2O3 at higher temperatures. By raising the temperature slowly, a change in the nature of the hydrogen interaction with copper chromite was observed. It was observed that at 200–350°C in hydrogen, copper chromite contained nanometer size metallic copper particles epitaxially bonded to the spinel surface. This state of catalyst exhibited high activity in hydrogenation reactions. X-ray diffraction analysis shows that the parent copper chromite is a spinel phase with a tetragonal distortion of the lattice and a standard cation distribution. Electron microscopy (EM) confirms the formation of well-crystallized spinel particles with crystal sizes from 500–1000 Å. The well-faceted crystals have no noticeable shape anisotropy.
Cite:
Yur'eva T.M.
, Plyasova L.M.
, Makarova O.V.
, Krieger T.A.
, Zaikovskii V.I.
Nanometer Size Copper Particles in Copper Chromite Catalysts
In compilation Preparation of Catalysts VI. Scientific Bases for the Preparation of Heterogeneous Catalysts : Proceedings of the Sixth International Symposium, 5-8 September 1994, Louvain-La-Neuve. 1995. – C.533-537. DOI: 10.1016/S0167-2991(06)81791-X WOS Scopus РИНЦ
Nanometer Size Copper Particles in Copper Chromite Catalysts
In compilation Preparation of Catalysts VI. Scientific Bases for the Preparation of Heterogeneous Catalysts : Proceedings of the Sixth International Symposium, 5-8 September 1994, Louvain-La-Neuve. 1995. – C.533-537. DOI: 10.1016/S0167-2991(06)81791-X WOS Scopus РИНЦ
Dates:
Published print: | Jan 1, 1995 |
Published online: | Sep 2, 2007 |
Identifiers:
Web of science | WOS:A1995BE35H00050 |
Scopus | 2-s2.0-33744550821 |
Elibrary | 29849036 |
Chemical Abstracts | 1995:799645 |
Chemical Abstracts (print) | 123:209760 |
OpenAlex | W83974164 |