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Preferential oxidation of CO in hydrogen stream over nano-gold catalysts prepared by photodeposition method

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Title: Preferential oxidation of CO in hydrogen stream over nano-gold catalysts prepared by photodeposition method
Authors: Chang, Li-Hsin1, Yeh, Yi-Lin1, Chen, Yu-Wen ywchen@cc.ncu.edu.tw
Source: International Journal of Hydrogen Energy. Apr2008, Vol. 33 Issue 7, p1965-1974. 10p.
Subjects: Spectrum analysis, Catalysis, Electron microscopy, Optics
Abstract: Abstract: A series of gold catalysts supported on TiO2 were prepared by photodeposition method. The effects of preparation parameters, such as power of UV light, irradiation time, and initial gold concentration, on the characteristics of the catalysts were studied. The catalysts were characterized by inductively coupled plasma-mass spectrometry, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, ultraviolet-visible diffuse reflectance spectroscopy, and high-resolution transmission electron microscopy. The catalytic activity of the catalyst for preferential oxidation of CO in hydrogen stream (PROX) was measured in a fixed-bed plug-flow reactor. The reactant gas containing 1.33% CO, 1.33% O2, 65.33% H2 and He for balance was fed into the reactor with a space velocity of 30,000ml/gh. The lower power source lamp can deposit small gold particles on the support, which in turn was responsible for the enhanced catalytic activity. The photodeposition method facilitates to prepare gold particles as small as 1.5nm on the support. These catalysts were very active and selective in PROX reaction. However, the small gold particles were not stable as long as the reaction temperature was . [Copyright &y& Elsevier]
Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science 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.)
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DbLabel: Engineering Source
An: 31559063
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Preferential oxidation of CO in hydrogen stream over nano-gold catalysts prepared by photodeposition method
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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="%22Yeh%2C+Yi-Lin%22">Yeh, Yi-Lin</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="%22International+Journal+of+Hydrogen+Energy%22">International Journal of Hydrogen Energy</searchLink>. Apr2008, Vol. 33 Issue 7, p1965-1974. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Catalysis%22">Catalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+microscopy%22">Electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Optics%22">Optics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: A series of gold catalysts supported on TiO2 were prepared by photodeposition method. The effects of preparation parameters, such as power of UV light, irradiation time, and initial gold concentration, on the characteristics of the catalysts were studied. The catalysts were characterized by inductively coupled plasma-mass spectrometry, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, ultraviolet-visible diffuse reflectance spectroscopy, and high-resolution transmission electron microscopy. The catalytic activity of the catalyst for preferential oxidation of CO in hydrogen stream (PROX) was measured in a fixed-bed plug-flow reactor. The reactant gas containing 1.33% CO, 1.33% O2, 65.33% H2 and He for balance was fed into the reactor with a space velocity of 30,000ml/gh. The lower power source lamp can deposit small gold particles on the support, which in turn was responsible for the enhanced catalytic activity. The photodeposition method facilitates to prepare gold particles as small as 1.5nm on the support. These catalysts were very active and selective in PROX reaction. However, the small gold particles were not stable as long as the reaction temperature was . [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science 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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        Value: 10.1016/j.ijhydene.2008.01.014
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 1965
    Subjects:
      – SubjectFull: Spectrum analysis
        Type: general
      – SubjectFull: Catalysis
        Type: general
      – SubjectFull: Electron microscopy
        Type: general
      – SubjectFull: Optics
        Type: general
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      – TitleFull: Preferential oxidation of CO in hydrogen stream over nano-gold catalysts prepared by photodeposition method
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            NameFull: Chang, Li-Hsin
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              M: 04
              Text: Apr2008
              Type: published
              Y: 2008
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              Value: 33
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            – TitleFull: International Journal of Hydrogen Energy
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