The reduction process of copper-zinc oxide-(alumina) methanol catalysts
CuO-ZnO-Al"2O"3 catalysts at different copper and zinc contents were obtained by thermal decomposition of hydroxycarbonate precursors at 350^oC in air. They were characterized by using X-ray diffraction, diffuse reflectance spectroscopy and surface area determination. We find disticnt CuO...
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E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1989 |
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| Reproduktion: |
Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 |
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in: Solid State Ionics - Amsterdam : Elsevier, 32-33(1989), Seite 1019-1024 |
| Übergeordnetes Werk: |
volume:32-33 ; year:1989 ; pages:1019-1024 |
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| 520 | |a CuO-ZnO-Al"2O"3 catalysts at different copper and zinc contents were obtained by thermal decomposition of hydroxycarbonate precursors at 350^oC in air. They were characterized by using X-ray diffraction, diffuse reflectance spectroscopy and surface area determination. We find disticnt CuO and ZnO phases whose particle sizes, determined by XRD line broadening, are in the range 65-90 Å for CuO and around 100 Å for ZnO in the binary CuO/ZnO systems. For pure CuO the particle dimensions are higher (D~140 Å). For the three component oxide, CuOZnOAl"2O"3=603010, the particle sizes of both CuO and ZnO phases are around 60 Å. The BET surface areas are around 70 m^2/g for the two components oxides, ~40 for pure CuO and for the three component systems. The reduction of the copper oxide (CuO) has been studied by in situ XRD. The reduction to metallic copper proceeds through the formation of intermediate Cu"2O which is present together with metallic copper even at relatively high extents of reduction. It has also been observed that the reduction process is much slower in the three component system than for pure CuO or the two component, CuO-ZnO, system. The presence of alumina in intimate contact with CuO and ZnO (due to the preparation conditions of the precursors) thus seems to hinder the reduction of the Cu^2^+ species (to Cu^+ or Cu^o) and to prevent the nucleation of both cuprous oxide and metallic copper partcles. | ||
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(DE-627)NLEJ17904091X (DE-599)GBVNLZ17904091X DE-627 ger DE-627 rakwb eng The reduction process of copper-zinc oxide-(alumina) methanol catalysts 1989 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier CuO-ZnO-Al"2O"3 catalysts at different copper and zinc contents were obtained by thermal decomposition of hydroxycarbonate precursors at 350^oC in air. They were characterized by using X-ray diffraction, diffuse reflectance spectroscopy and surface area determination. We find disticnt CuO and ZnO phases whose particle sizes, determined by XRD line broadening, are in the range 65-90 Å for CuO and around 100 Å for ZnO in the binary CuO/ZnO systems. For pure CuO the particle dimensions are higher (D~140 Å). For the three component oxide, CuOZnOAl"2O"3=603010, the particle sizes of both CuO and ZnO phases are around 60 Å. The BET surface areas are around 70 m^2/g for the two components oxides, ~40 for pure CuO and for the three component systems. The reduction of the copper oxide (CuO) has been studied by in situ XRD. The reduction to metallic copper proceeds through the formation of intermediate Cu"2O which is present together with metallic copper even at relatively high extents of reduction. It has also been observed that the reduction process is much slower in the three component system than for pure CuO or the two component, CuO-ZnO, system. The presence of alumina in intimate contact with CuO and ZnO (due to the preparation conditions of the precursors) thus seems to hinder the reduction of the Cu^2^+ species (to Cu^+ or Cu^o) and to prevent the nucleation of both cuprous oxide and metallic copper partcles. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Porta, P. oth Dragone, R. oth Lo Jacono, M. oth Minelli, G. oth Moretti, G. oth in Solid State Ionics Amsterdam : Elsevier 32-33(1989), Seite 1019-1024 (DE-627)NLEJ177061618 (DE-600)1500750-9 0167-2738 nnns volume:32-33 year:1989 pages:1019-1024 http://linkinghub.elsevier.com/retrieve/pii/0167-2738(89)90393-7 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 32-33 1989 1019-1024 |
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(DE-627)NLEJ17904091X (DE-599)GBVNLZ17904091X DE-627 ger DE-627 rakwb eng The reduction process of copper-zinc oxide-(alumina) methanol catalysts 1989 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier CuO-ZnO-Al"2O"3 catalysts at different copper and zinc contents were obtained by thermal decomposition of hydroxycarbonate precursors at 350^oC in air. They were characterized by using X-ray diffraction, diffuse reflectance spectroscopy and surface area determination. We find disticnt CuO and ZnO phases whose particle sizes, determined by XRD line broadening, are in the range 65-90 Å for CuO and around 100 Å for ZnO in the binary CuO/ZnO systems. For pure CuO the particle dimensions are higher (D~140 Å). For the three component oxide, CuOZnOAl"2O"3=603010, the particle sizes of both CuO and ZnO phases are around 60 Å. The BET surface areas are around 70 m^2/g for the two components oxides, ~40 for pure CuO and for the three component systems. The reduction of the copper oxide (CuO) has been studied by in situ XRD. The reduction to metallic copper proceeds through the formation of intermediate Cu"2O which is present together with metallic copper even at relatively high extents of reduction. It has also been observed that the reduction process is much slower in the three component system than for pure CuO or the two component, CuO-ZnO, system. The presence of alumina in intimate contact with CuO and ZnO (due to the preparation conditions of the precursors) thus seems to hinder the reduction of the Cu^2^+ species (to Cu^+ or Cu^o) and to prevent the nucleation of both cuprous oxide and metallic copper partcles. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Porta, P. oth Dragone, R. oth Lo Jacono, M. oth Minelli, G. oth Moretti, G. oth in Solid State Ionics Amsterdam : Elsevier 32-33(1989), Seite 1019-1024 (DE-627)NLEJ177061618 (DE-600)1500750-9 0167-2738 nnns volume:32-33 year:1989 pages:1019-1024 http://linkinghub.elsevier.com/retrieve/pii/0167-2738(89)90393-7 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 32-33 1989 1019-1024 |
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(DE-627)NLEJ17904091X (DE-599)GBVNLZ17904091X DE-627 ger DE-627 rakwb eng The reduction process of copper-zinc oxide-(alumina) methanol catalysts 1989 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier CuO-ZnO-Al"2O"3 catalysts at different copper and zinc contents were obtained by thermal decomposition of hydroxycarbonate precursors at 350^oC in air. They were characterized by using X-ray diffraction, diffuse reflectance spectroscopy and surface area determination. We find disticnt CuO and ZnO phases whose particle sizes, determined by XRD line broadening, are in the range 65-90 Å for CuO and around 100 Å for ZnO in the binary CuO/ZnO systems. For pure CuO the particle dimensions are higher (D~140 Å). For the three component oxide, CuOZnOAl"2O"3=603010, the particle sizes of both CuO and ZnO phases are around 60 Å. The BET surface areas are around 70 m^2/g for the two components oxides, ~40 for pure CuO and for the three component systems. The reduction of the copper oxide (CuO) has been studied by in situ XRD. The reduction to metallic copper proceeds through the formation of intermediate Cu"2O which is present together with metallic copper even at relatively high extents of reduction. It has also been observed that the reduction process is much slower in the three component system than for pure CuO or the two component, CuO-ZnO, system. The presence of alumina in intimate contact with CuO and ZnO (due to the preparation conditions of the precursors) thus seems to hinder the reduction of the Cu^2^+ species (to Cu^+ or Cu^o) and to prevent the nucleation of both cuprous oxide and metallic copper partcles. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Porta, P. oth Dragone, R. oth Lo Jacono, M. oth Minelli, G. oth Moretti, G. oth in Solid State Ionics Amsterdam : Elsevier 32-33(1989), Seite 1019-1024 (DE-627)NLEJ177061618 (DE-600)1500750-9 0167-2738 nnns volume:32-33 year:1989 pages:1019-1024 http://linkinghub.elsevier.com/retrieve/pii/0167-2738(89)90393-7 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 32-33 1989 1019-1024 |
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(DE-627)NLEJ17904091X (DE-599)GBVNLZ17904091X DE-627 ger DE-627 rakwb eng The reduction process of copper-zinc oxide-(alumina) methanol catalysts 1989 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier CuO-ZnO-Al"2O"3 catalysts at different copper and zinc contents were obtained by thermal decomposition of hydroxycarbonate precursors at 350^oC in air. They were characterized by using X-ray diffraction, diffuse reflectance spectroscopy and surface area determination. We find disticnt CuO and ZnO phases whose particle sizes, determined by XRD line broadening, are in the range 65-90 Å for CuO and around 100 Å for ZnO in the binary CuO/ZnO systems. For pure CuO the particle dimensions are higher (D~140 Å). For the three component oxide, CuOZnOAl"2O"3=603010, the particle sizes of both CuO and ZnO phases are around 60 Å. The BET surface areas are around 70 m^2/g for the two components oxides, ~40 for pure CuO and for the three component systems. The reduction of the copper oxide (CuO) has been studied by in situ XRD. The reduction to metallic copper proceeds through the formation of intermediate Cu"2O which is present together with metallic copper even at relatively high extents of reduction. It has also been observed that the reduction process is much slower in the three component system than for pure CuO or the two component, CuO-ZnO, system. The presence of alumina in intimate contact with CuO and ZnO (due to the preparation conditions of the precursors) thus seems to hinder the reduction of the Cu^2^+ species (to Cu^+ or Cu^o) and to prevent the nucleation of both cuprous oxide and metallic copper partcles. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Porta, P. oth Dragone, R. oth Lo Jacono, M. oth Minelli, G. oth Moretti, G. oth in Solid State Ionics Amsterdam : Elsevier 32-33(1989), Seite 1019-1024 (DE-627)NLEJ177061618 (DE-600)1500750-9 0167-2738 nnns volume:32-33 year:1989 pages:1019-1024 http://linkinghub.elsevier.com/retrieve/pii/0167-2738(89)90393-7 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 32-33 1989 1019-1024 |
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(DE-627)NLEJ17904091X (DE-599)GBVNLZ17904091X DE-627 ger DE-627 rakwb eng The reduction process of copper-zinc oxide-(alumina) methanol catalysts 1989 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier CuO-ZnO-Al"2O"3 catalysts at different copper and zinc contents were obtained by thermal decomposition of hydroxycarbonate precursors at 350^oC in air. They were characterized by using X-ray diffraction, diffuse reflectance spectroscopy and surface area determination. We find disticnt CuO and ZnO phases whose particle sizes, determined by XRD line broadening, are in the range 65-90 Å for CuO and around 100 Å for ZnO in the binary CuO/ZnO systems. For pure CuO the particle dimensions are higher (D~140 Å). For the three component oxide, CuOZnOAl"2O"3=603010, the particle sizes of both CuO and ZnO phases are around 60 Å. The BET surface areas are around 70 m^2/g for the two components oxides, ~40 for pure CuO and for the three component systems. The reduction of the copper oxide (CuO) has been studied by in situ XRD. The reduction to metallic copper proceeds through the formation of intermediate Cu"2O which is present together with metallic copper even at relatively high extents of reduction. It has also been observed that the reduction process is much slower in the three component system than for pure CuO or the two component, CuO-ZnO, system. The presence of alumina in intimate contact with CuO and ZnO (due to the preparation conditions of the precursors) thus seems to hinder the reduction of the Cu^2^+ species (to Cu^+ or Cu^o) and to prevent the nucleation of both cuprous oxide and metallic copper partcles. Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 Porta, P. oth Dragone, R. oth Lo Jacono, M. oth Minelli, G. oth Moretti, G. oth in Solid State Ionics Amsterdam : Elsevier 32-33(1989), Seite 1019-1024 (DE-627)NLEJ177061618 (DE-600)1500750-9 0167-2738 nnns volume:32-33 year:1989 pages:1019-1024 http://linkinghub.elsevier.com/retrieve/pii/0167-2738(89)90393-7 GBV_USEFLAG_H ZDB-1-SDJ GBV_NL_ARTICLE AR 32-33 1989 1019-1024 |
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The reduction process of copper-zinc oxide-(alumina) methanol catalysts |
| abstract |
CuO-ZnO-Al"2O"3 catalysts at different copper and zinc contents were obtained by thermal decomposition of hydroxycarbonate precursors at 350^oC in air. They were characterized by using X-ray diffraction, diffuse reflectance spectroscopy and surface area determination. We find disticnt CuO and ZnO phases whose particle sizes, determined by XRD line broadening, are in the range 65-90 Å for CuO and around 100 Å for ZnO in the binary CuO/ZnO systems. For pure CuO the particle dimensions are higher (D~140 Å). For the three component oxide, CuOZnOAl"2O"3=603010, the particle sizes of both CuO and ZnO phases are around 60 Å. The BET surface areas are around 70 m^2/g for the two components oxides, ~40 for pure CuO and for the three component systems. The reduction of the copper oxide (CuO) has been studied by in situ XRD. The reduction to metallic copper proceeds through the formation of intermediate Cu"2O which is present together with metallic copper even at relatively high extents of reduction. It has also been observed that the reduction process is much slower in the three component system than for pure CuO or the two component, CuO-ZnO, system. The presence of alumina in intimate contact with CuO and ZnO (due to the preparation conditions of the precursors) thus seems to hinder the reduction of the Cu^2^+ species (to Cu^+ or Cu^o) and to prevent the nucleation of both cuprous oxide and metallic copper partcles. |
| abstractGer |
CuO-ZnO-Al"2O"3 catalysts at different copper and zinc contents were obtained by thermal decomposition of hydroxycarbonate precursors at 350^oC in air. They were characterized by using X-ray diffraction, diffuse reflectance spectroscopy and surface area determination. We find disticnt CuO and ZnO phases whose particle sizes, determined by XRD line broadening, are in the range 65-90 Å for CuO and around 100 Å for ZnO in the binary CuO/ZnO systems. For pure CuO the particle dimensions are higher (D~140 Å). For the three component oxide, CuOZnOAl"2O"3=603010, the particle sizes of both CuO and ZnO phases are around 60 Å. The BET surface areas are around 70 m^2/g for the two components oxides, ~40 for pure CuO and for the three component systems. The reduction of the copper oxide (CuO) has been studied by in situ XRD. The reduction to metallic copper proceeds through the formation of intermediate Cu"2O which is present together with metallic copper even at relatively high extents of reduction. It has also been observed that the reduction process is much slower in the three component system than for pure CuO or the two component, CuO-ZnO, system. The presence of alumina in intimate contact with CuO and ZnO (due to the preparation conditions of the precursors) thus seems to hinder the reduction of the Cu^2^+ species (to Cu^+ or Cu^o) and to prevent the nucleation of both cuprous oxide and metallic copper partcles. |
| abstract_unstemmed |
CuO-ZnO-Al"2O"3 catalysts at different copper and zinc contents were obtained by thermal decomposition of hydroxycarbonate precursors at 350^oC in air. They were characterized by using X-ray diffraction, diffuse reflectance spectroscopy and surface area determination. We find disticnt CuO and ZnO phases whose particle sizes, determined by XRD line broadening, are in the range 65-90 Å for CuO and around 100 Å for ZnO in the binary CuO/ZnO systems. For pure CuO the particle dimensions are higher (D~140 Å). For the three component oxide, CuOZnOAl"2O"3=603010, the particle sizes of both CuO and ZnO phases are around 60 Å. The BET surface areas are around 70 m^2/g for the two components oxides, ~40 for pure CuO and for the three component systems. The reduction of the copper oxide (CuO) has been studied by in situ XRD. The reduction to metallic copper proceeds through the formation of intermediate Cu"2O which is present together with metallic copper even at relatively high extents of reduction. It has also been observed that the reduction process is much slower in the three component system than for pure CuO or the two component, CuO-ZnO, system. The presence of alumina in intimate contact with CuO and ZnO (due to the preparation conditions of the precursors) thus seems to hinder the reduction of the Cu^2^+ species (to Cu^+ or Cu^o) and to prevent the nucleation of both cuprous oxide and metallic copper partcles. |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">NLEJ17904091X</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20210706091558.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">070505s1989 xx |||||o 00| ||eng c</controlfield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)NLEJ17904091X</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)GBVNLZ17904091X</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="245" ind1="1" ind2="4"><subfield code="a">The reduction process of copper-zinc oxide-(alumina) methanol catalysts</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1989</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zzz</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">z</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zu</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">CuO-ZnO-Al"2O"3 catalysts at different copper and zinc contents were obtained by thermal decomposition of hydroxycarbonate precursors at 350^oC in air. They were characterized by using X-ray diffraction, diffuse reflectance spectroscopy and surface area determination. We find disticnt CuO and ZnO phases whose particle sizes, determined by XRD line broadening, are in the range 65-90 Å for CuO and around 100 Å for ZnO in the binary CuO/ZnO systems. For pure CuO the particle dimensions are higher (D~140 Å). For the three component oxide, CuOZnOAl"2O"3=603010, the particle sizes of both CuO and ZnO phases are around 60 Å. The BET surface areas are around 70 m^2/g for the two components oxides, ~40 for pure CuO and for the three component systems. The reduction of the copper oxide (CuO) has been studied by in situ XRD. The reduction to metallic copper proceeds through the formation of intermediate Cu"2O which is present together with metallic copper even at relatively high extents of reduction. It has also been observed that the reduction process is much slower in the three component system than for pure CuO or the two component, CuO-ZnO, system. The presence of alumina in intimate contact with CuO and ZnO (due to the preparation conditions of the precursors) thus seems to hinder the reduction of the Cu^2^+ species (to Cu^+ or Cu^o) and to prevent the nucleation of both cuprous oxide and metallic copper partcles.</subfield></datafield><datafield tag="533" ind1=" " ind2=" "><subfield code="f">Elsevier Journal Backfiles on ScienceDirect 1907 - 2002</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Porta, P.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Dragone, R.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Lo Jacono, M.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Minelli, G.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Moretti, G.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">in</subfield><subfield code="t">Solid State Ionics</subfield><subfield code="d">Amsterdam : Elsevier</subfield><subfield code="g">32-33(1989), Seite 1019-1024</subfield><subfield code="w">(DE-627)NLEJ177061618</subfield><subfield code="w">(DE-600)1500750-9</subfield><subfield code="x">0167-2738</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:32-33</subfield><subfield code="g">year:1989</subfield><subfield code="g">pages:1019-1024</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://linkinghub.elsevier.com/retrieve/pii/0167-2738(89)90393-7</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_H</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-1-SDJ</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_NL_ARTICLE</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">32-33</subfield><subfield code="j">1989</subfield><subfield code="h">1019-1024</subfield></datafield></record></collection>
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