The DOI matches its Crossref record; 13 of the 13 references it cites were found in a registry or an index.
DRFT-IR Studies of the Surface of γ-Alumina
Abstract
γ-Alumina surfaces dehydrated at 450 and 700 °C were studied by using the conventional pyridine adsorption-DRFTIR technique. Three types of Lewis acid sites are present on the surface, and in each case pyridine adsorbed on them is concomitantly interacting with their adjacent OH groups. Because only three types of Lewis acid sites are present, only three hydrogen bonding bands were observed upon pyridine adsorption. From correlation of OH bands with hydrogen bonding bands, it is found that weak Lewis acid sites have type II 66 or II 64 OH groups as their neighbors, medium strong Lewis acid sites have type III OH groups near by, and strong Lewis acid sites have type I 6 OH groups next to them. Dehydration at 700 °C generates more types of OH groups that also interact with pyridine. The reactivity of OH groups is not determined by their acidity and space restrictions, but rather by their proximity to Lewis acid sites. We assigned the three types of Lewis acid sites to five-, four-, and three-coordinate Al 3+ ions.
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Cites
Catalytic Aluminas: Surface Models and Characterization of Surface Sites
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An infrared study of pyridine adsorbed on acidic solids. Characterization of surface acidity
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A Model for the Surface of γ-Alumina1
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Infrared spectra of surface hydroxyl groups and crystalline structure of oxides
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Use of DFT to achieve a rational understanding of acid?basic properties of ?-alumina surfaces
DIGNE, M. (2004) · Journal of Catalysis · doi:10.1016/j.jcat.2004.04.020 · Cited by 1,085
Ryczkowski, J. (2001) · Catalysis Today · doi:10.1016/s0920-5861(01)00334-0 · Cited by 485
The surface of transitional aluminas: A critical review
Busca, G. (2014) · Catalysis Today · doi:10.1016/j.cattod.2013.08.003 · Cited by 422
Tian, X., Wang, Y., Zeng, Z., Dai, L., Xu, J., Cobb, K., Ke, L., Zou, R., Liu, Y., & Ruan, R. (2022) · Green Chemistry · doi:10.1039/d1gc04537g · Cited by 128
Metadata
- Authors
- Liu, X., & Truitt, R. E.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 1997-10-01
- Volume
- 119
- Issue
- 41
- Pages
- 9856-9860
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2068084085
- Cited by
- 255
- References
- 13
- FWCI
- 4.00
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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