Preparation of ZnO/Al2O3 catalysts by using atomic layer deposition for plasma-assisted non-oxidative methane coupling
We prepared a ZnO/mesoporous Al 2 O 3 -shell/core structure by using atomic layer deposition (ALD) of ZnO on commercially-available mesoporous Al 2 O 3 . We used various analysis techniques such as scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, inductively coupled p...
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| Vydáno v: | Journal of the Korean Physical Society Ročník 68; číslo 10; s. 1221 - 1227 |
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| Hlavní autoři: | , , , , , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
| Vydáno: |
Seoul
The Korean Physical Society
01.05.2016
한국물리학회 |
| Témata: | |
| ISSN: | 0374-4884, 1976-8524 |
| On-line přístup: | Získat plný text |
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| Shrnutí: | We prepared a ZnO/mesoporous Al
2
O
3
-shell/core structure by using atomic layer deposition (ALD) of ZnO on commercially-available mesoporous Al
2
O
3
. We used various analysis techniques such as scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, inductively coupled plasma-atomic emission spectroscopy, and surface area and pore size analyses based on nitrogen isotherm data. A 200 nm-thick slab of mesoporous Al
2
O
3
particles was decorated by ZnO upon ALD deposition, whereas the inner part of the Al
2
O
3
particle was free of ZnO. We evaluated the catalytic activity of the bare and the ZnO-covered Al
2
O
3
for plasma-assisted nonoxidative coupling of methane. The catalytic behavior was shown to be sensitive to the amount of ZnO deposited. Particularly, 40-cycled ZnO/Al
2
O
3
showed an enhanced selectivity to the olefin product with almost the same CH4 conversion as that of bare Al
2
O
3
. Preparation of the shell/core structure by using ALD can be an interesting strategy for finding highly-efficient catalysts in a plasma-assisted catalytic reaction. |
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| Bibliografie: | G704-000411.2016.68.10.007 |
| ISSN: | 0374-4884 1976-8524 |
| DOI: | 10.3938/jkps.68.1221 |