In:
ChemCatChem, Wiley, Vol. 8, No. 12 ( 2016-06-21), p. 2155-2164
Abstract:
A series of Co x Ti catalysts with different Co/Ti molar ratios ( x= 0.2, 0.4, 0.6, and 0.8) were prepared by the sol‐gel method and used for N 2 O decomposition. The catalysts were characterized by XRD, X‐ray photoelectron spectroscopy (XPS), TEM, temperature‐programmed reduction with H 2 , temperature‐programmed desorption of O 2 , diffuse reflectance UV/Vis, Raman spectra, and N 2 adsorption–desorption measurements. The results indicate that the Co x Ti catalysts possess high Brunauer–Emmett–Teller (BET) surface area, more surface Co 3+ , and even better structural stability than Co 3 O 4 as a result of the strong interactions between Co and Ti oxide. Deactivation occurred over time for the Co 3 O 4 catalyst, however, Co 0.6 Ti maintains nearly 100 % N 2 O conversion for at least 30 h. Moreover, the Co 0.6 Ti catalyst showed much stronger resistance against 1.5 vol. % O 2 , 2.4 vol. % H 2 O, or 1.6 vol. % NO in the feed compared with the Co 3 O 4 catalyst. The excellent activity of the Co 0.6 Ti catalyst can be attributed to the higher amount of surface Co 3+ derived from the interaction of the Co and Ti oxide in the Co x Ti catalysts.
Type of Medium:
Online Resource
ISSN:
1867-3880
,
1867-3899
DOI:
10.1002/cctc.201600231
Language:
English
Publisher:
Wiley
Publication Date:
2016
detail.hit.zdb_id:
2501161-3
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