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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Bibliographic Details
Published in:Journal of the Korean Physical Society Vol. 68; no. 10; pp. 1221 - 1227
Main Authors: Jeong, Myung-Geun, Kim, Young Dok, Park, Sunyoung, Kasinathan, Palraj, Hwang, Young Kyu, Chang, Jong-San, Park, Yong-Ki
Format: Journal Article
Language:English
Published: Seoul The Korean Physical Society 01.05.2016
한국물리학회
Subjects:
Mathematical and Computational Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Theoretical
물리학
DBD plasma
Atomic layer deposition
Non-oxidative methane coupling
ISSN:0374-4884, 1976-8524
Online Access:Get full text
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Summary: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.
Bibliography:G704-000411.2016.68.10.007
ISSN:0374-4884
1976-8524
DOI:10.3938/jkps.68.1221