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首页> 外文期刊>Applied Surface Science >Application of near ambient pressure gas-phase X-ray photoelectron spectroscopy to the investigation of catalytic properties of copper in methanol oxidation
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Application of near ambient pressure gas-phase X-ray photoelectron spectroscopy to the investigation of catalytic properties of copper in methanol oxidation

机译：近环境压力气相X射线光电子能谱在铜催化甲醇氧化反应性能研究中的应用

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摘要

Application of near ambient pressure (NAP) X-ray photoelectron spectroscopy for characterization of catalytic properties of a heterogeneous catalyst through measurement and analysis of the core-level spectra from gas phase constituents, which become measurable in submillibar pressure range, has been demonstrated for the reaction of methanol oxidation over polycrystalline copper foil. To improve the accuracy of quantitative analysis of the gas phase signals for the routine XPS spectrometer with double Al/Mg anode used in these experiments, the sample was removed from XPS analysis zone, but it was still located in high-pressure gas cell. As consequence, only gas phase peaks from reagents and reaction products have been observed in XPS spectra. Quantitative analysis of the spectra has allowed us to calculate conversions of the reagents and yields of the reaction products, or, other words, to characterize the catalytic properties of the catalyst and to track their changes with temperature. Further comparison of the catalytic properties with concentration of the surface species measured by in situ XPS in separate experiments, but under the same conditions, gives a possibility to discuss the reaction mechanisms. (C) 2015 Published by Elsevier B.V.
机译：已经证明，通过测量和分析气相成分的核能级光谱，可以在亚毫巴压力范围内测量近环境压力（NAP）X射线光电子能谱表征多相催化剂的催化性能。多晶铜箔上甲醇氧化反应为了提高在这些实验中使用的具有双Al / Mg阳极的常规XPS光谱仪对气相信号进行定量分析的准确性，将样品从XPS分析区域中取出，但仍位于高压气室中。结果，在XPS光谱中仅观察到来自试剂和反应产物的气相峰。光谱的定量分析使我们能够计算试剂的转化率和反应产物的产率，换句话说，表征催化剂的催化性能并跟踪其随温度的变化。在单独的实验中，但在相同条件下，通过原位XPS测量的催化性能与表面物种浓度的进一步比较提供了讨论反应机理的可能性。 （C）2015由Elsevier B.V.发布

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  • 来源
    《Applied Surface Science》 |2016年第15期|303-309|共7页
  • 作者

    Prosvirin Igor P.; Bukhtiyarov Andrey V.; Bluhm Hendrik; Bukhtiyarov Valerii I.;

  • 作者单位

    Boreskov Inst Catalysis, Lavrentieva Ave 5, Novosibirsk 630090, Russia|Novosibirsk State Univ, Pirogova Str 2, Novosibirsk 630090, Russia;

    Boreskov Inst Catalysis, Lavrentieva Ave 5, Novosibirsk 630090, Russia|Novosibirsk State Univ, Res & Educ Ctr Energy Efficient Catalysis, Pirogova Str 2, Novosibirsk 630090, Russia;

    Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Chem Sci Div, 1 Cyclotron Rd, Berkeley, CA 94720 USA;

    Boreskov Inst Catalysis, Lavrentieva Ave 5, Novosibirsk 630090, Russia|Novosibirsk State Univ, Pirogova Str 2, Novosibirsk 630090, Russia|Novosibirsk State Univ, Res & Educ Ctr Energy Efficient Catalysis, Pirogova Str 2, Novosibirsk 630090, Russia;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    X-ray photoelectron spectroscopy; Catalysis; Methanol oxidation; Copper; In situ measurements;

    机译：X射线光电子能谱;催化;甲醇氧化;铜;原位测量;

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