Jun, Jin and Dhayal, Marshal and Shin, Joong-Hyeok and Han, Young Hwan and Getoff, Nikola (2008) Surface chemistry and catalytic activity of Ni/Al(2)O(3) irradiated with high-energy electron beam. Applied Surface Science, 254 (15). 4557-4564 . ISSN 0169-4332

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Abstract

The radiation effects induced effects by electron beam (EB) treatment on the catalytic activity of Ni/gamma-Al(2)O(3) were studied for the carbon dioxide reforming of methane with different EB energy and absorbed radiation dose. Transmission electron microscope (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to determine the change in structure and surface states of Ni/gamma-Al(2)O(3) catalyst before and after the EB treatment. Higher energy EB treatment is useful for increasing the proportion of the active sites (such as Ni(0) and NiAl(2)O(4)-phase) on the surface. The increase of Ni/Al-ratio indicates that the Ni dispersion on the surface increased with the EB-treatment, resulting in an increase of the active sites, which leads to improving the catalytic activity. XPS measurement also showed a decrease of the surface carbon with EB dose. The maximum 20% increase in the conversion of CO(2)/CH(4)-mixture into CO/H(2) gas was observed for the catalyst treated with 2 MeV energy and 600 kGy dose of EB relative to untreated.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Materials Science Applied Physics/Condensed Matter Physical Chemistry/Chemical Physics Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	18 Apr 2017 11:20
Last Modified:	18 Apr 2017 11:20
URI:	http://npl.csircentral.net/id/eprint/2122

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