Journal ArticleDOI
On the issue of the active site and the role of ZnO in Cu/ZnO methanol synthesis catalysts
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TLDR
In this paper, the active site and the role of ZnO in Cu/ZnO-based methanol synthesis catalysts can be consistently explained based on the literature results by distinguishing CO2 and CO hydrogenations.Abstract:
The problem concerning the active site and the role of ZnO in Cu/ZnO-based methanol synthesis catalysts can be consistently explained based on the literature results by distinguishing CO2 and CO hydrogenations. Although only metallic copper has some activities for methanol synthesis by the hydrogenation of CO2, Cu-Zn alloying in Cu particles is responsible for the major promotional role of ZnO in industrial Cu/ZnO-based catalysts. The morphology effect reported in the literature will probably appear for the system of highly dispersed Cu particles supported on ZnO. As for the hydrogenation of CO, Cu+ species or Cu-O-Zn sites are the active sites for methanol synthesis. The spillover effect of the Cu-ZnO system is not significant compared to the effect of ZnO on the creation of the Cu-O-Zn site.read more
Citations
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Journal ArticleDOI
Recent advances in catalytic hydrogenation of carbon dioxide
TL;DR: A critical review of recent developments in hydrogenation reaction, with emphases on catalytic reactivity, reactor innovation, and reaction mechanism, provides an overview regarding the challenges and opportunities for future research in the field.
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
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.
Journal ArticleDOI
Indium Oxide as a Superior Catalyst for Methanol Synthesis by CO2 Hydrogenation.
Oliver Martin,Antonio J. Martín,Cecilia Mondelli,Sharon Mitchell,Takuya F. Segawa,Roland Hauert,Charlotte Drouilly,Daniel Curulla-Ferré,Javier Pérez-Ramírez +8 more
TL;DR: In-depth characterization of the In2 O3 -based materials points towards a mechanism rooted in the creation and annihilation of oxygen vacancies as active sites, whose amount can be modulated in situ by co-feeding CO and boosted through electronic interactions with the zirconia carrier.
References
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Journal ArticleDOI
Catalytic synthesis of methanol from COH2: I. Phase composition, electronic properties, and activities of the Cu/ZnO/M2O3 catalysts
TL;DR: In this article, the X-ray diffraction, optical, and XPS-Auger studies are presented that describe the formation, electronic structure, and surface composition of low pressure methanol synthesis catalysts.
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Synthesis of Methanol
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The activity and state of the copper surface in methanol synthesis catalysts
TL;DR: A frontal chromatographic version of this technique has been developed which is very suitable for in situ measurements and this has enabled the apparent copper areas of various catalysts to be measured after exposures to methanol synthesis gases of different compositions at typical industrial conditions in microreactors commonly used for assessing the methenol synthesis activity of such catalysts as discussed by the authors.
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In Situ Investigations of Structural Changes in Cu/ZnO Catalysts
TL;DR: 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.
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Junction effect interactions in methanol synthesis catalysts
TL;DR: In this paper, the minute Schottky junctions at the interface between metals and oxides in the catalysts affect the surface chemistry of the oxides, in a way that correlates with catalytic behavior.