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Au/MnO2–TiO2 catalyst for preferential oxidation of carbon monoxide in hydrogen stream

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Title: Au/MnO2–TiO2 catalyst for preferential oxidation of carbon monoxide in hydrogen stream
Authors: Chang, Li-Hsin1, Sasirekha, Natarajan1, Chen, Yu-Wen ywchen@cc.ncu.edu.tw
Source: Catalysis Communications. Nov2007, Vol. 8 Issue 11, p1702-1710. 9p.
Subjects: Spectrum analysis, Poisonous gases, Carbon monoxide, Chemistry
Abstract: Abstract: The catalytic activity of nanosize gold catalysts supported on MnO2–TiO2 and prepared by deposition–precipitation method has been investigated for preferential oxidation of carbon monoxide in H2 stream. The catalysts were characterized by inductively coupled plasma-atomic emission spectroscopy, X-ray diffraction, nitrogen sorption, transmission electron microscopy, and X-ray photoelectron spectroscopy. The influence of pH in the preparation process and the amount of MnO2 loading on the catalytic properties of the Au/MnO2–TiO2 catalysts were also studied. Fine dispersion of gold nanoparticles on all the supports was obtained. Especially, Au/MnO2–TiO2 with MnO2/TiO2 mol ratio of 2:98, showed a mean Au particle size of 2.37nm. The nanosized support constrained the size of gold. The addition of MnO2 on Au/TiO2 catalyst improved the selectivity of CO oxidation without sacrificing CO conversion in hydrogen stream between 50 and 100°C. This could be attributed to the interactions of gold metal with MnO2–TiO2 support and the optimum combination of metallic and electron-deficient gold on the catalyst surface. [Copyright &y& Elsevier]
Copyright of Catalysis Communications is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 26681086
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Au/MnO<subscript>2</subscript>–TiO<subscript>2</subscript> catalyst for preferential oxidation of carbon monoxide in hydrogen stream
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  Data: <searchLink fieldCode="AR" term="%22Chang%2C+Li-Hsin%22">Chang, Li-Hsin</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Sasirekha%2C+Natarajan%22">Sasirekha, Natarajan</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Chen%2C+Yu-Wen%22">Chen, Yu-Wen</searchLink><i> ywchen@cc.ncu.edu.tw</i>
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  Data: <searchLink fieldCode="JN" term="%22Catalysis+Communications%22">Catalysis Communications</searchLink>. Nov2007, Vol. 8 Issue 11, p1702-1710. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Poisonous+gases%22">Poisonous gases</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+monoxide%22">Carbon monoxide</searchLink><br /><searchLink fieldCode="DE" term="%22Chemistry%22">Chemistry</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: The catalytic activity of nanosize gold catalysts supported on MnO2–TiO2 and prepared by deposition–precipitation method has been investigated for preferential oxidation of carbon monoxide in H2 stream. The catalysts were characterized by inductively coupled plasma-atomic emission spectroscopy, X-ray diffraction, nitrogen sorption, transmission electron microscopy, and X-ray photoelectron spectroscopy. The influence of pH in the preparation process and the amount of MnO2 loading on the catalytic properties of the Au/MnO2–TiO2 catalysts were also studied. Fine dispersion of gold nanoparticles on all the supports was obtained. Especially, Au/MnO2–TiO2 with MnO2/TiO2 mol ratio of 2:98, showed a mean Au particle size of 2.37nm. The nanosized support constrained the size of gold. The addition of MnO2 on Au/TiO2 catalyst improved the selectivity of CO oxidation without sacrificing CO conversion in hydrogen stream between 50 and 100°C. This could be attributed to the interactions of gold metal with MnO2–TiO2 support and the optimum combination of metallic and electron-deficient gold on the catalyst surface. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Catalysis Communications is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.catcom.2006.08.050
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      – Code: eng
        Text: English
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        PageCount: 9
        StartPage: 1702
    Subjects:
      – SubjectFull: Spectrum analysis
        Type: general
      – SubjectFull: Poisonous gases
        Type: general
      – SubjectFull: Carbon monoxide
        Type: general
      – SubjectFull: Chemistry
        Type: general
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      – TitleFull: Au/MnO2–TiO2 catalyst for preferential oxidation of carbon monoxide in hydrogen stream
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            NameFull: Chang, Li-Hsin
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            NameFull: Chen, Yu-Wen
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              M: 11
              Text: Nov2007
              Type: published
              Y: 2007
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