Formation and Properties of Dispersed Palladium Particles over Graphite and Diamond Full article
Conference |
New Frontiers in Catalysis : 10th International Congress on Catalysis 19-24 Jul 1992 , Budapest |
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Source | New Frontiers in Catalysis : Proceedings of the 10th International Congress on Catalysis, Budapest, 19-24 July 1992 Compilation, Elsevier. Amsterdam-London-New York-Tokyo.1993. 2859 c. |
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Journal |
Studies in Surface Science and Catalysis
ISSN: 0167-2991 |
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Output data | Year: 1993, Volume: 75, Pages: 837-847 Pages count : 11 DOI: 10.1016/S0167-2991(08)64060-4 | ||
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Abstract:
According to the TEM and HT data, the size of Pd particles in Pd/C catalysts prepared via interaction of C3H5PdC5H5 complex with the surface of carbon supports and reduced with hydrogen at 573 K ranges from 10 to 20 Å. After increasing reduction temperature up to 873 K, dispersion of Pd/Altunit (ultra dispersed diamond) remains practically the same, while the size of metal particles in Pd/Sibunit (graphite-like carbon) increases up to 100 Å. This difference is due to the peculiarities of the interaction between Pd particles and the surface of graphite and diamond in hydrogen atmosphere. In the reactions of acetylene and vinylacetylene hydrogenation the specific activity of Pd/C is comparable to those of Pd/SiO2, but in 1–2 orders lower in reactions of ethane hydrogenolysis and CO hydrogenation.
The introduction of Zr ions to Pd/C results in the following effects: appearance of a new absorption band at 1600 cm−1 in the spectrum of adsorbed CO, increase in the specific activity in methanol synthesis by 1–2 orders but drastic decrease in the specific activity in ethane hydrogenolysis, while high temperature oxidation of the samples completely eliminates the inhibitor action of Zr ions. These peculiarities are similar to those previously observed for (Pd+ Zr)/SiO2 as well as for Pd/ZrO2, and are likely to be due to mixed Pd-Zrn+ active sites formed in the systems.
Cite:
Alekseev O.S.
, Nosova L.V.
, Ryndin Y.A.
Formation and Properties of Dispersed Palladium Particles over Graphite and Diamond
In compilation New Frontiers in Catalysis : Proceedings of the 10th International Congress on Catalysis, Budapest, 19-24 July 1992. – Elsevier., 1993. – Т.1-3. – C.837-847. DOI: 10.1016/S0167-2991(08)64060-4 WOS WOS Scopus РИНЦ
Formation and Properties of Dispersed Palladium Particles over Graphite and Diamond
In compilation New Frontiers in Catalysis : Proceedings of the 10th International Congress on Catalysis, Budapest, 19-24 July 1992. – Elsevier., 1993. – Т.1-3. – C.837-847. DOI: 10.1016/S0167-2991(08)64060-4 WOS WOS Scopus РИНЦ
Dates:
Published print: | Jan 1, 1993 |
Published online: | May 29, 2008 |
Identifiers:
Web of science | WOS:A1993MH87500058 , WOS:A1993BZ34Y00058 |
Scopus | 2-s2.0-0346394527 |
Elibrary | 26594994 |
Chemical Abstracts | 1994:16346 |
Chemical Abstracts (print) | 120:16346 |
OpenAlex | W51422816 |