期刊
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
卷 157, 期 1-2, 页码 265-268出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1381-1169(00)00144-8
关键词
superoxide O-2(-) species; ESR; titanium silicalite-1; adsorption
The interactions of silicalite-1 (S-1), titanium silicalite -1 (TS-1), Ti-Si gel and anatase with H2O2 were investigated by ESR technique. It was found that different Ti-O-2(-) species could be formed over TS-1 zeolite and Ti-Si gel, which are dependent on the local structures of Ti atoms. The decay of O-2(-) species on these samples depicted that O-2(-) species on framework Ti sites are much more unstable than O-2(-) species on dispersed extra framework Ti sites. The reaction of O-2(-) species with phenol confirmed that O-2(-) species on framework Ti sites are highly active. (C) 2000 Elsevier Science B.V. All rights reserved.
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