XPS Study of the Size Effect in Ethene Epoxidation on Supported Silver Catalysts Full article
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Journal of the Chemical Society - Faraday Transactions (1990-1998, in 1999 become Physical Chemistry Chemical Physics)
ISSN: 0956-5000 |
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| Output data | Year: 1997, Volume: 93, Number: 13, Pages: 2323-2329 Pages count : 7 DOI: 10.1039/a608414a | ||
| Tags | RAY PHOTOELECTRON-SPECTROSCOPY; PARTICLE-SIZE; ETHYLENE OXIDATION; PLATINUM CATALYSTS; METAL-CLUSTERS; OXYGEN STATES; PALLADIUM; REACTIVITY; NMR; HYDROGENATION | ||
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Abstract:
Supported silver catalysts (Ag/α-Al 2 O 3 ) with different particle sizes (100–1000 Å) have been prepared and studied by XPS. It has been shown that the increase in the ethene epoxidation rate with silver particle size (size effect) is accompanied by a decrease in the Ag 3d 5/2 binding energy value. The variation in E b (Ag 3d 5/2 ) cannot be explained in terms of a change in the metallic character of the silver (initial state effect), but seems to be determined by the differential charging of the supported silver. The latter effect originates from the easier screening of surface charge induced by photoemission on the silver particles owing to their internal conductivity, rather than that on the dielectric support. The correlation between the internal conductivity of supported silver particles and their catalytic activity is discussed in the context of possible mechanisms for ethene epoxidation.
Cite:
Bukhtiyarov V.I.
, Prosvirin I.P.
, Kvon R.I.
, Goncharova S.N.
, Bal'zhinimaev B.S.
XPS Study of the Size Effect in Ethene Epoxidation on Supported Silver Catalysts
Journal of the Chemical Society - Faraday Transactions (1990-1998, in 1999 become Physical Chemistry Chemical Physics). 1997. V.93. N13. P.2323-2329. DOI: 10.1039/a608414a WOS Scopus РИНЦ OpenAlex ANCAN
XPS Study of the Size Effect in Ethene Epoxidation on Supported Silver Catalysts
Journal of the Chemical Society - Faraday Transactions (1990-1998, in 1999 become Physical Chemistry Chemical Physics). 1997. V.93. N13. P.2323-2329. DOI: 10.1039/a608414a WOS Scopus РИНЦ OpenAlex ANCAN
Dates:
| Submitted: | Dec 16, 1996 |
| Published print: | Jul 7, 1997 |
Identifiers:
| ≡ Web of science: | WOS:A1997XK02000014 |
| ≡ Scopus: | 2-s2.0-33748628558 |
| ≡ Elibrary: | 13258595 |
| ≡ OpenAlex: | W2084368036 |
| ≡ Chemical Abstracts: | 1997:471473 |
| ≡ Chemical Abstracts (print): | 127:86732 |