In situ XRD and HRTEM Studies on the Evolution of the Cu/ZnO Methanol Synthesis Catalyst During Its Reduction and Re-Oxidation Научная публикация
| Журнал |
PCCP: Physical Chemistry Chemical Physics
ISSN: 1463-9076 , E-ISSN: 1463-9084 |
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| Вых. Данные | Год: 2004, Том: 6, Номер: 18, Страницы: 4522-4526 Страниц : 5 DOI: 10.1039/b407728h | ||||
| Ключевые слова | OXIDE CATALYSTS; COPPER; HYDROGEN; STATE | ||||
| Авторы |
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| Организации |
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Информация о финансировании (1)
| 1 | Netherlands Organisation for Scientific Research | 047.015.004 |
Реферат:
During the formation of the CuZnO solid solutions, the foreign anions in anion-modified (a.m.-) oxides give rise to: (i) extended stacking faults of (002) ZnO lattice plane, which are occupied by copper ions in the form of small clusters; and (ii) vacant inner holes of the a.m.-ZnO crystal. The main part of copper ions in the clusters is reduced to Cu0 with hydrogen at 473 K. According to HRTEM studies, the reduction of Cu0.08Zn0.92O results in the formation of copper metal species of two types: (i) particles of 3–10 nm in size on the a.m.-ZnO surface; and (ii) small (no more than 3 nm in size) atomic copper metal clusters in defect voids of the a.m.-ZnO structure. The copper metal clusters are coherent inclusions in the bulk of the ZnO, and the large copper metal particles are epitaxially bonded to the surface of the ZnO matrix. Copper metal particles on the surface of a.m.-ZnO are reoxidized to Cu+2 at 523 K in the helium flow containing 0.05 vol% oxygen, and they come back to the extended stacking faults. The copper metal clusters in the holes of a.m.-ZnO are inaccessible to the oxygen and are not reoxidized.
Библиографическая ссылка:
Yurieva T.M.
, Plyasova L.M.
, Zaikovskii V.I.
, Minyukova T.P.
, Bliek A.
, van den Heuvel J.C.
, Davydova L.P.
, Molina I.Y.
, Demeshkina M.P.
, Khassin A.A.
, Batyrev E.D.
In situ XRD and HRTEM Studies on the Evolution of the Cu/ZnO Methanol Synthesis Catalyst During Its Reduction and Re-Oxidation
PCCP: Physical Chemistry Chemical Physics. 2004. V.6. N18. P.4522-4526. DOI: 10.1039/b407728h WOS Scopus РИНЦ CAPlusCA OpenAlex
In situ XRD and HRTEM Studies on the Evolution of the Cu/ZnO Methanol Synthesis Catalyst During Its Reduction and Re-Oxidation
PCCP: Physical Chemistry Chemical Physics. 2004. V.6. N18. P.4522-4526. DOI: 10.1039/b407728h WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Поступила в редакцию: | 24 мая 2004 г. |
| Принята к публикации: | 13 июл. 2004 г. |
| Опубликована online: | 29 июл. 2004 г. |
| Опубликована в печати: | 21 сент. 2004 г. |
Идентификаторы БД:
| Web of science: | WOS:000223679300021 |
| Scopus: | 2-s2.0-8344234977 |
| РИНЦ: | 13458486 |
| Chemical Abstracts: | 2004:717735 |
| Chemical Abstracts (print): | 141:356048 |
| OpenAlex: | W2145220997 |