Journal ArticleDOI
In Situ Investigations of Structural Changes in Cu/ZnO Catalysts
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In this article, the structure and catalytic activity of Cu/ZnO methanol synthesis catalysts have been investigated by a further developed in situ method, which combines X-ray diffraction (XRD), Xray absorption fine structure spectroscopy (XAFS), and on-line catalytic measurements by mass spectrometry.About:
This article is published in Journal of Catalysis.The article was published on 2000-09-10. It has received 508 citations till now. The article focuses on the topics: X-ray absorption fine structure & Copper.read more
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Journal ArticleDOI
The Active Site of Methanol Synthesis over Cu/ZnO/Al2O3 Industrial Catalysts
Malte Behrens,Felix Studt,Igor Kasatkin,Stefanie Kühl,Michael Hävecker,Frank Abild-Pedersen,Stefan Zander,Frank Girgsdies,Patrick Kurr,Benjamin-Louis Kniep,Michael Tovar,Richard W. Fischer,Jens K. Nørskov,Jens K. Nørskov,Robert Schlögl +14 more
TL;DR: This work shows how to identify the crucial atomic structure motif for the industrial Cu/ZnO/Al2O3 methanol synthesis catalyst by using a combination of experimental evidence from bulk, surface-sensitive, and imaging methods collected on real high-performance catalytic systems in combination with density functional theory calculations.
Journal ArticleDOI
Cobalt particle size effects in the fischer- : Tropsch reaction studied with carbon nanofiber supported catalysts
G. Leendert Bezemer,Johannes H. Bitter,H.P.C.E. Kuipers,Heiko Oosterbeek,Johannes E. Holewijn,Xiaoding Xu,Freek Kapteijn,A. Jos van Dillen,Krijn P. de Jong +8 more
TL;DR: X-ray absorption spectroscopy revealed that cobalt was metallic, even for small particle sizes, after the in situ reduction treatment, which is a prerequisite for catalytic operation and is difficult to achieve using traditional oxidic supports.
Journal ArticleDOI
Atom-Resolved Imaging of Dynamic Shape Changes in Supported Copper Nanocrystals
Poul L. Hansen,Jakob Birkedal Wagner,Stig Helveg,Jens R. Rostrup-Nielsen,Bjerne S. Clausen,Henrik Topsøe +5 more
TL;DR: In situ transmission electron microscopy is used to obtain atom-resolved images of copper nanocrystals on different supports, which are catalysts for methanol synthesis and hydrocarbon conversion processes for fuel cells.
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Active sites for CO2 hydrogenation to methanol on Cu/ZnO catalysts
Shyam Kattel,Pedro J. Ramírez,Jingguang G. Chen,Jingguang G. Chen,José A. Rodriguez,José A. Rodriguez,Ping Liu,Ping Liu +7 more
TL;DR: A direct comparison between the activity of ZnCu and ZnO/Cu model catalysts for methanol synthesis is reported, highlighting a synergy of Cu andZnO at the interface that facilitates methenol synthesis via formate intermediates.
References
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Book
A handbook of lattice spacings and structures of metals and alloys
W. B. Pearson,George H. Vineyard +1 more
TL;DR: The Handbook of Lattice spacings and structures of metals and alloys as discussed by the authors is a handbook of argumentative essay structure spacing and lattice plane model modified by the incorporation of thermodynamic functions appropriate to the f.c.
Journal ArticleDOI
Multiple-scattering calculations of x-ray-absorption spectra
TL;DR: A high-order multiple-scattering approach to the calculation of polarized x-ray-absorption spectra, which includes both x- Ray- absorption fine structure and x-Ray- absorption near-edge structure, is presented.
Journal Article
X-ray absorption : principles, applications, techniques of EXAFS, SEXAFS, and XANES
TL;DR: Theory of X-ray Absorption Spectroscopy (EXAFS) is described in this paper, where the authors present an experimental setup of EXAFS with Synchrotron Radiation.
Journal ArticleDOI
XXV. Zur Frage der Geschwindigkeit des Wachsthums und der Auflösung der Krystallflächen
TL;DR: In der krystallographischen Literatur der letzten Zeit erscheinen mehr und mehr Arbeiten, welche dem gegenseitigen Verhältnisse des Krystalles and des Mediums, in welchem er sich bildet, gewidmet sind.