Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Claus J. H. Jacobsen"'
Autor:
Nan-Yu Topsøe, Bjerne S. Clausen, Claus J. H. Jacobsen, Henrik Topsøe, Jens K. Nørskov, C.V. Ovesen
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 104:283-291
Recently, we have shown that the periodic variations in the HDS activities of different transition metal sulfides can be explained by a Bond Energy Model (BEM) based on theoretically calculated metal sulfur bond energies. The model differs from many
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05caa2843572ad8ebc6eead2a217f65b
https://doi.org/10.1002/bscb.19951040415
https://doi.org/10.1002/bscb.19951040415
Autor:
Claus J. H. Jacobsen, Thomas Willum Hansen, Michael Brorson, Astrid Boisen, Søren Dahl, Iver Schmidt
Publikováno v:
Technical University of Denmark Orbit
Nanomaterials are the building blocks of nanotechnology. Recently, nanotube materials have attracted considerable attention due to their unique physical and chemical properties. Here we discuss how nanotubes can be used as templates for preparation o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59f7cfb57dffab9cd4759e51aee31d80
https://doi.org/10.4028/www.scientific.net/msf.443-444.217
https://doi.org/10.4028/www.scientific.net/msf.443-444.217
Publikováno v:
Materials Science Forum. :319-324
The calcination of the zeolite ZSM-5 was studied by in situ X-ray synchrotron powder diffraction. Two samples were studied: One conventionally synthesized (CONV) and one synthesized in a charcoal matrix according to the confined space synthesis metho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25005d67ec0c4e098340a1e6c44a4413
https://doi.org/10.4028/www.scientific.net/msf.443-444.319
https://doi.org/10.4028/www.scientific.net/msf.443-444.319
Autor:
Hans J. Jakobsen, Henrik Bildsøe, Tania Giavani, Jørgen Skibsted, Niels Blom, Kim Johannsen, Claus J. H. Jacobsen
Publikováno v:
Giavani, T, Johannsen, K, Jacobsen, C J H, Blom, N, Bildsøe, H, Skibsted, J & Jakobsen, H J 2003, ' Unusual observation of nitrogen chemical shift anisotropies in tetraalkylammonium halides by 14N MAS NMR spectroscopy ', Solid. State. Nucl. Mag., vol. 24, pp. 218-235 .
14N Magic-angle spinning (MAS) NMR spectra for a number of polycrystalline, symmetrical tetraalkylammonium halides with short alkyl chains (C2H(5)- to n-C4H(9)-) have been recorded following a careful setup of the experimental conditions. Analysis of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c71224b4c92c247a9bcc46fa3808e6d2
https://doi.org/10.1016/s0926-2040(03)00019-5
https://doi.org/10.1016/s0926-2040(03)00019-5
Autor:
Karoliina Honkala, Jens K. Nørskov, Claus J. H. Jacobsen, Siren Dahl, Ashildur Logadottir, Thomas Bligaard
Publikováno v:
Technical University of Denmark Orbit
For a class of heterogeneously catalyzed reactions, we explain the compensation effect in terms of a switching of kinetic regimes leading to a concomitant change in the apparent activation energy a...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c26a64407684cd1caa042660cd93752
https://doi.org/10.1021/jp034447g
https://doi.org/10.1021/jp034447g
Autor:
Hans J. Jakobsen, Claus J. H. Jacobsen, Ulla Gro Nielsen, Astrid Boisen, Jørgen Skibsted, Michael Brorson
Publikováno v:
Inorganic Chemistry. 41:6432-6439
Polycrystalline samples of AlVO(4) have been prepared by two methods of synthesis and characterized by (27)Al and (51)V MAS NMR spectroscopy at 14.1 T. The MAS NMR spectra clearly reveal that essentially pure samples with minor impurities of V(2)O(5)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9a1d14468a2c81b1775e5ec0b36767d
https://doi.org/10.1021/ic0204023
https://doi.org/10.1021/ic0204023
Publikováno v:
Journal of Catalysis. 208:180-186
The kinetics of ammonia synthesis and N2 dissociation over cesium-promoted Co3Mo3N are studied. The results support recent DFT calculations and explain why Co3Mo3N shows a higher ammonia synthesis activity than either constituting metal. The ammonia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bb3bb9cf2d4de310a046464f25e9f58
https://doi.org/10.1006/jcat.2002.3571
https://doi.org/10.1006/jcat.2002.3571
Publikováno v:
Catalysis Letters. 84:7-12
The catalytic activities of three supported, barium-promoted ruthenium catalysts for ammonia synthesis are reported. The three supports are silicon nitride (Si3N4), magnesium aluminum spinel (MgAl2O4), and graphitized carbon (C). The effect of the pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6374c3c374fa200643a1d9ab2b1a8a31
https://doi.org/10.1023/a:1021028718491
https://doi.org/10.1023/a:1021028718491
Autor:
Claus J. H. Jacobsen, Jens K. Nørskov, Bjerne S. Clausen, Ashildur Logadottir, Astrid Boisen, Henrik Topsøe, Søren Dahl
Publikováno v:
Journal of Catalysis. 205:382-387
For ammonia synthesis catalysts a volcano-type relationship has been found experimentally. We demonstrate that by combining density functional theory calculations with a microkinetic model the position of the maximum of the volcano curve is sensitive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b4f0be8f25c16af73544158177ee6fe
https://doi.org/10.1006/jcat.2001.3442
https://doi.org/10.1006/jcat.2001.3442
Publikováno v:
Applied Catalysis A: General. 222:19-29
The activity and selectivity of heterogeneous catalysts are determined by their electronic and structural properties. In many cases, the electronic properties are determined by the choice of both the catalytically active transition metal and promoter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71b778efc503fb776c53dfe6e94de72a
https://doi.org/10.1016/s0926-860x(01)00826-2
https://doi.org/10.1016/s0926-860x(01)00826-2