Nature of Active Palladium Sites on Nitrogen Doped Carbon Nanofibers in Selective Hydrogenation of Acetylene Full article
| Journal |
Diamond and Related Materials
ISSN: 0925-9635 , E-ISSN: 1879-0062 |
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| Output data | Year: 2018, Volume: 89, Pages: 67-73 Pages count : 7 DOI: 10.1016/j.diamond.2018.08.007 | ||||||
| Tags | Ni-Cu CATALYST; Pd/C CATALYSTS; FORMIC-ACID; ETHYLENE/AMMONIA MIXTURE; ELECTRICAL-CONDUCTIVITY; FUSED DIPORPHYRINS; STRUCTURAL-CHANGES; METAL-CLUSTERS; IN-SITU; DECOMPOSITION | ||||||
| Authors |
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| Affiliations |
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Funding (4)
| 1 | Russian Foundation for Basic Research | 18-03-01251 |
| 2 | Russian Science Foundation | 17-73-30032 |
| 3 | Russian Foundation for Basic Research | 16-03-01139 |
| 4 | National Science Foundation | 1214068 |
Abstract:
The nature of the active sites for palladium supported on nitrogen doped carbon nanofibers (Pd/N-CNFs) catalysts for selective hydrogenation of acetylene to ethylene was examined. Palladium concentrations of 0.05–0.6 wt% were deposited on carbon nanofibers doped by nitrogen atoms (N-CNFs) and characterized by transmission electron microscopy (TEM), CO chemisorption, X-ray photoelectron spectroscopy (XPS), Extended X-ray Absorption Fine Structure (EXAFS) and quantum-chemical calculations. The data indicates that the Pd initially forms highly-dispersed particles. However, decreasing of the Pd concentration on the carbon nanofibers doped by nitrogen atoms below 0.15 wt% led to stabilization of the metal in the atomic state. Porphyrin-like defects with four nitrogen atoms are formed on the surface of the CNFs and strongly interact with palladium atoms, and thus can be sites for stabilization of atomic Pd. The catalytic activity and selectivity of Pd/N-CNFs catalysts depend on the ratio of these two palladium states.
Cite:
Chesnokov V.V.
, Kriventsov V.V.
, Malykhin S.E.
, Svintsitskiy D.A.
, Podyacheva O.Y.
, Lisitsyn A.S.
, Richards R.M.
Nature of Active Palladium Sites on Nitrogen Doped Carbon Nanofibers in Selective Hydrogenation of Acetylene
Diamond and Related Materials. 2018. V.89. P.67-73. DOI: 10.1016/j.diamond.2018.08.007 WOS Scopus РИНЦ OpenAlex ANCAN
Nature of Active Palladium Sites on Nitrogen Doped Carbon Nanofibers in Selective Hydrogenation of Acetylene
Diamond and Related Materials. 2018. V.89. P.67-73. DOI: 10.1016/j.diamond.2018.08.007 WOS Scopus РИНЦ OpenAlex ANCAN
Dates:
| Submitted: | May 18, 2018 |
| Accepted: | Aug 14, 2018 |
| Published online: | Aug 14, 2018 |
| Published print: | Oct 1, 2018 |
Identifiers:
| ≡ Web of science: | WOS:000449240000008 |
| ≡ Scopus: | 2-s2.0-85051671764 |
| ≡ Elibrary: | 35729889 |
| ≡ OpenAlex: | W2886636240 |
| ≡ Chemical Abstracts: | 2018:1550450 |
| ≡ Chemical Abstracts (print): | 169:383339 |