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Surface Characterization Of Copper(II) Oxide-zinc Oxide Methanol-synthesis Catalysts By X-ray Photoelectron Spectroscopy. 2. Reduced Catalysts

Y. Okamoto, Kiyotaka Fukino, Toshinobu Imanaka, S. Teranishi
Published 1983 · Chemistry

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The surface state of the coprecipitated cupric oxide-zinc oxide (CuO-ZnO) catalysts reduced at 250/sup 0/C with H/sub 2/ was investigated by x-ray photoelectron spectroscopy (XPS). It was found that a monovalent copper species was present in the surface of the catalysts with low copper contents. It was revealed that two distinct types of copper metal species, both of them being negatively charged by electron transfer from ZnO, were produced in the catalyst surface upon the reduction. In the high copper content catalysts (> 25 wt % CuO), the predominant Cu metal species is described by well-dispersed metal particles, whereas in the low copper content catalysts (< 10 wt % CuO), the major copper metal species is best characterized by a two-dimensional epitaxial copper layer over ZnO. It is concluded that both the two-dimensional copper metal and Cu/sup +/ are formed from Cu/sup 2 +/ dissolved in a ZnO lattice, while the copper metal particles are originating mainly from crystalline and amorphous copper oxide phases. The two-dimensional copper metal species was found to be preferentially reoxidized to Cu/sup +/ when exposed to air at room temperature. The two-dimensional Cu/sup 0/-Cu/sup +/ species are suggested to be catalytically active for the methanolmore » synthesis at low temperature and pressure. The reduction of ZnO was observed only when reduced at 500/sup 0/C and in the presence of copper. In the case of the impregnated catalysts, no appreciable interactions were found between Cu metal and ZnO, in contrast to the coprecipitated catalysts. 7 figures, 2 tables.« less



This paper is referenced by
10.1039/d0cy00143k
Does the structure of CuZn hydroxycarbonate precursors affect the intrinsic hydrogenolysis activity of CuZn catalysts
V. Pospelová (2020)
10.1016/S0167-2991(09)60487-0
Chapter 4: Heterogeneous Carbon Monoxide Hydrogenation
A. Kiennemann (1988)
10.2497/JJSPM.37.759
Electrical Properties of Superconducting Bi-Sr-Ca-Cu-O Ceramics prepared by Hot-forge Processing
T. Nishida (1990)
10.1006/JCAT.2000.2979
Dehydrogenation of Cyclohexanol on Copper-Containing Catalysts: I. The Influence of the Oxidation State of Copper on the Activity of Copper Sites
V. Fridman (2000)
10.1016/0926-860X(94)80135-5
Nature of formate in methanol synthesis on Cu/ZnO/A2O3
K. V. Bussche (1994)
10.1007/BF00764214
Role of the support and of the preparation method for copper-based catalysts in the 2-propanol decomposition
F. Pepe (1992)
10.1021/ACSCATAL.5B01266
High Efficiency Cu-ZnO Hydrogenation Catalyst: The Tailoring of Cu-ZnO Interface Sites by Molecular Layer Deposition
Bin Zhang (2015)
10.1002/chem.201701697
New Insights into the Role of Al2 O3 in the Promotion of CuZnAl Catalysts: A Model Study.
J. Hu (2017)
10.1016/S0039-6028(99)00900-0
Mechanism of the hydrogenation of CO2 to methanol on a Cu(100) surface: dipped adcluster model study
Zhen-ming Hu (1999)
10.1016/0021-9517(85)90087-9
Catalysts for low-temperature methanol synthesis. II: Catalytic behavior of Cu/Zn/Al mixed oxides
S. Gusi (1985)
10.1002/9780471730071.CH6
Hydrogen Production and Synthesis Gas Reactions
C. H. Bartholomew (2010)
10.1007/BF00807616
The relation between reduction temperature and activity in copper catalysed ester hydrogenolysis and methanol synthesis
D. Brands (1996)
10.1016/S0166-9834(00)80907-0
Support and morphological effects in the synthesis of methanol over Cu/ZnO, Cu/ZrO2 and Cu/SiO2 catalysts
G. Bartley (1988)
10.1246/CL.1984.71
Synergy between Cu and ZnO for methanol conversions over Cu-ZnO catalysts.
Y. Okamoto (1984)
10.1016/S0166-9834(00)82508-7
A comparison of Raney copper-zinc and coprecipitated copper-zinc-aluminium oxide methanol syntheses catalysts
A. Bridgewater (1986)
10.1002/JCCS.199800102
The effects of M2O3 on stabilizing monocopper over the surface of Cu-ZnO-M2O3 catalysts for methanol synthesis
H. Chen (1998)
10.1016/0926-860X(94)85181-6
Effects of zinc addition to silica supported copper catalysts for the hydrogenolysis of esters
F. T. V. D. Scheur (1994)
10.1038/334577A0
Junction effect interactions in methanol synthesis catalysts
J. C. Frost (1988)
10.1016/S0166-9834(00)80122-0
Microcalorimetric investigation of the interaction of carbon monoxide with coprecipitated cupric oxide−zinc oxide catalysts in well-defined oxidation states
E. Giamello (1988)
10.1016/S0166-9834(00)84089-0
SOLID-SOLID INTERACTION AND ELECTRONIC PROPERTIES OF COPPER-ZINC OXIDE CATALYSTS
G. Sengupta (1991)
10.1006/JCAT.1997.1554
A Novel Process for the Preparation of Cu/ZnO and Cu/ZnO/Al2O3Ultrafine Catalyst: Structure, Surface Properties, and Activity for Methanol Synthesis from CO2+H2☆
Qi Sun (1997)
10.1016/0368-2048(89)80026-X
The interaction of O2 with Cu/Ni(100) and Cu/NiO/Ni(100) surfaces studied by XPS
K. Kishi (1989)
10.1016/0021-9517(86)90346-5
Low-temperature formation of Cu+ in evaporated CuCr oxide films: Application to methanol synthesis
G. Apai (1986)
10.1016/0169-4332(92)90136-L
Characterization of CuZnAl oxide catalysts in the precipitaed, calcined and reduced state by means of XPS with the help of a finger-print data base
B. Peplinski (1992)
10.1007/S10562-009-9847-8
The Role of the Promoters in Cu Based Catalysts for Methanol Steam Reforming
Guisheng Wu (2009)
10.1016/J.JCAT.2005.07.007
Effect of pretreatment conditions on Cu/Zn/Zr-based catalysts for the steam reforming of methanol to H2
P. Matter (2005)
10.1016/S1003-9953(09)60016-5
Catalytic properties of Cu/Co/Zn/Zr oxides prepared by various methods
L. Shi (2008)
10.1039/FT9928801033
Evidence for the adsorption of molecules at special sites located at copper/zinc oxide interfaces: part 1.—A Fourier-transform infrared study of formic acid and formaldehyde adsorption on reduced and oxidised Cu/ZnO/SiO2 catalysts
G. Millar (1992)
10.1016/S0167-2991(09)60128-2
Catalytic Chemistry Of Low Alcohol Synthesis - Following R. B. Anderson'S Lead
K. Klier (1984)
10.1016/0166-9834(91)80025-R
Improvements to Raney copper methanol synthesis catalysts through zinc impregnation: I. Electron microprobe analysis
H. Curry-Hyde (1991)
10.1080/08843758808915904
Crystal size growth in the liquid phase methanol synthesis catalyst
A. Sawant (1988)
10.1016/0169-4332(90)90043-Y
Characterization of well dispersed copper species on the surface of ZnO by x-ray photoelectron spectroscopy
G. Moretti (1990)
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