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Synthesis of an active and stable Ptshell–Pdcore/C catalyst for the electro-oxidation of methanol.

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Title: Synthesis of an active and stable Ptshell–Pdcore/C catalyst for the electro-oxidation of methanol.
Authors: Choi, Insoo1,2, Ahn, Sang Hyun2, Kim, Myeong Ho1, Kwon, Oh Joong3 ojkwon@incheon.ac.kr, Kim, Jae Jeong1 jjkimm@snu.ac.kr
Source: International Journal of Hydrogen Energy. Mar2014, Vol. 39 Issue 8, p3681-3689. 9p.
Subjects: Platinum compounds, Palladium catalysts, Chemical stability, Oxidation of methanol, Electrolytic oxidation, Inorganic synthesis, Electroless deposition
Abstract: Abstract: A Ptshell–Pdcore/C catalyst is prepared via electroless deposition and galvanic displacement. The catalyst is active toward the electro-oxidation of methanol and is more stable against COad-poisoning than a commercial Pt/C catalyst. The stable activity of Ptshell–Pdcore/C is ascribed to the tuned electronic property of the Pt over-layer in the Ptshell–Pdcore/C, which leads to weak binding with COad and increases the kinetics of OHad formation. The weakened binding property of the surface Pt with COad and the facile oxidation of COad by OHad were confirmed by a spectroscopic analysis and in a COad-stripping experiment, respectively. The electro-oxidation of COad by OHad is the rate-determining step of methanol oxidation. Therefore, the accelerated formation of OHad contributes to the overall oxidation reaction, preventing COad-poisoning. In addition, Ptshell–Pdcore/C maintains its activity longer than Pt/C does during a prolonged cycle experiment. [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.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 94404558
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Synthesis of an active and stable Pt<subscript>shell</subscript>–Pd<subscript>core</subscript>/C catalyst for the electro-oxidation of methanol.
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  Data: <searchLink fieldCode="AR" term="%22Choi%2C+Insoo%22">Choi, Insoo</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Ahn%2C+Sang+Hyun%22">Ahn, Sang Hyun</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Kim%2C+Myeong+Ho%22">Kim, Myeong Ho</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kwon%2C+Oh+Joong%22">Kwon, Oh Joong</searchLink><relatesTo>3</relatesTo><i> ojkwon@incheon.ac.kr</i><br /><searchLink fieldCode="AR" term="%22Kim%2C+Jae+Jeong%22">Kim, Jae Jeong</searchLink><relatesTo>1</relatesTo><i> jjkimm@snu.ac.kr</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Hydrogen+Energy%22">International Journal of Hydrogen Energy</searchLink>. Mar2014, Vol. 39 Issue 8, p3681-3689. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Platinum+compounds%22">Platinum compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Palladium+catalysts%22">Palladium catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+stability%22">Chemical stability</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation+of+methanol%22">Oxidation of methanol</searchLink><br /><searchLink fieldCode="DE" term="%22Electrolytic+oxidation%22">Electrolytic oxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Inorganic+synthesis%22">Inorganic synthesis</searchLink><br /><searchLink fieldCode="DE" term="%22Electroless+deposition%22">Electroless deposition</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: A Ptshell–Pdcore/C catalyst is prepared via electroless deposition and galvanic displacement. The catalyst is active toward the electro-oxidation of methanol and is more stable against COad-poisoning than a commercial Pt/C catalyst. The stable activity of Ptshell–Pdcore/C is ascribed to the tuned electronic property of the Pt over-layer in the Ptshell–Pdcore/C, which leads to weak binding with COad and increases the kinetics of OHad formation. The weakened binding property of the surface Pt with COad and the facile oxidation of COad by OHad were confirmed by a spectroscopic analysis and in a COad-stripping experiment, respectively. The electro-oxidation of COad by OHad is the rate-determining step of methanol oxidation. Therefore, the accelerated formation of OHad contributes to the overall oxidation reaction, preventing COad-poisoning. In addition, Ptshell–Pdcore/C maintains its activity longer than Pt/C does during a prolonged cycle experiment. [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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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.ijhydene.2013.12.118
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 9
        StartPage: 3681
    Subjects:
      – SubjectFull: Platinum compounds
        Type: general
      – SubjectFull: Palladium catalysts
        Type: general
      – SubjectFull: Chemical stability
        Type: general
      – SubjectFull: Oxidation of methanol
        Type: general
      – SubjectFull: Electrolytic oxidation
        Type: general
      – SubjectFull: Inorganic synthesis
        Type: general
      – SubjectFull: Electroless deposition
        Type: general
    Titles:
      – TitleFull: Synthesis of an active and stable Ptshell–Pdcore/C catalyst for the electro-oxidation of methanol.
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            NameFull: Choi, Insoo
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            NameFull: Ahn, Sang Hyun
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            NameFull: Kim, Myeong Ho
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            NameFull: Kwon, Oh Joong
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            NameFull: Kim, Jae Jeong
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              M: 03
              Text: Mar2014
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              Y: 2014
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            – TitleFull: International Journal of Hydrogen Energy
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