Metal–Promoter Interactions in Vanadium Oxide Promoted Rh/SiO2 Catalysts Full article
Journal |
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: 1992, Volume: 88, Number: 18, Pages: 2775-2782 Pages count : 8 DOI: 10.1039/FT9928802775 | ||||
Tags | CARBON-MONOXIDE HYDROGENATION; RHODIUM SILICA CATALYSTS; REDUCTION TREATMENTS; SUPPORTED RHODIUM; CO HYDROGENATION; Rh CATALYSTS; ETHANE HYDROGENOLYSIS; PARTICLE-SIZE; SiO2; OXIDATION | ||||
Authors |
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Affiliations |
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Funding (3)
1 | German Research Foundation | SFB 338 |
2 | Federal Ministry of Education and Research | |
3 | Verband der Chemischen Industrie |
Abstract:
The influence of the calcination temperature on the structure and morphology of vanadium oxide promoted, silica-supported rhodium catalysts was studied. Pure Rh/SiO2 and VOx/SiO2 served as reference systems. The samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), temperature-programmed reduction (TPR), FTIR spectroscopy of adsorbed CO and BET surface-area measurements. BET, XRD and TEM investigations revealed a strong sintering of the silica support at calcination temperatures at and above 973 K. There is a crystalline silica phase, which was found exclusively in the promoted Rh/SiO2 catalyst calcined at 1173 K. XRD, TPR and TEM gave evidence for the formation of rhodium–Vanadium mixed oxide on the catalyst surface at 973 K calcination. After high-temperature reduction (HTR = 773 K) highly dispersed metal is formed from this ternary oxide phase. A C- and O-bonded carbonyl species probably located at the metal/promoter interface was detected by FTIR spectroscopy at 83 K.
Cite:
Beutel T.
, Knözinger H.
, Siborov A.V.
, Zaikovskii V.I.
Metal–Promoter Interactions in Vanadium Oxide Promoted Rh/SiO2 Catalysts
Journal of the Chemical Society - Faraday Transactions (1990-1998, in 1999 become Physical Chemistry Chemical Physics). 1992. V.88. N18. P.2775-2782. DOI: 10.1039/FT9928802775 WOS Scopus РИНЦ
Metal–Promoter Interactions in Vanadium Oxide Promoted Rh/SiO2 Catalysts
Journal of the Chemical Society - Faraday Transactions (1990-1998, in 1999 become Physical Chemistry Chemical Physics). 1992. V.88. N18. P.2775-2782. DOI: 10.1039/FT9928802775 WOS Scopus РИНЦ
Dates:
Submitted: | May 11, 1992 |
Identifiers:
Web of science | WOS:A1992JP50000033 |
Scopus | 2-s2.0-0001369621 |
Elibrary | 30800868 |
Chemical Abstracts | 1992:620880 |
Chemical Abstracts (print) | 117:220880 |
OpenAlex | W2092297599 |