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Interfacial Effects in Iron-Nickel Hydroxide-Platinum Nanoparticles Enhance Catalytic Oxidation

机译:氢氧化镍铁铂纳米颗粒的界面效应增强催化氧化

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摘要

Hybrid metal nanoparticles can allow separate reaction steps to occur in close proximity at different metal sites and accelerate catalysis. We synthesized iron-nickel hydroxide-platinum (transition metal-OH-Pt) nanoparticles with diameters below 5 nanometers and showed that they are highly efficient for carbon monoxide (CO) oxidation catalysis at room temperature. We characterized the composition and structure of the transition metal-OH-Pt interface and showed that Ni~(2+) plays a key role in stabilizing the interface against dehydration. Density functional theory and isotope-labeling experiments revealed that the OH groups at the Fe~(3+)-OH-Pt interfaces readily react with CO adsorbed nearby to directly yield carbon dioxide (CO_2) and simultaneously produce coordinatively unsaturated Fe sites for O_2 activation. The oxide-supported PtFeNi nanocatalyst rapidly and fully removed CO from humid air without decay in activity for 1 month.
机译:杂化金属纳米颗粒可以允许在不同的金属位点附近发生独立的反应步骤,并加速催化作用。我们合成了直径小于5纳米的铁-镍-氢氧化-铂-过渡金属-OH-Pt纳米颗粒,结果表明它们在室温下对一氧化碳(CO)氧​​化催化非常有效。我们表征了过渡金属-OH-Pt界面的组成和结构,并表明Ni〜(2+)在稳定界面抗脱水方面起着关键作用。密度泛函理论和同位素标记实验表明,Fe〜(3 +)-OH-Pt界面上的OH基易于与附近吸附的CO反应,直接产生二氧化碳(CO_2),同时产生了用于O_2活化的配位不饱和Fe位点。氧化物负载的PtFeNi纳米催化剂可在1个月内迅速,完全地从潮湿的空气中除去CO,而活性不会降低。

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  • 来源
    《Science》 |2014年第6183期|495-499|共5页
  • 作者单位

    State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers, and Esters, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;

    State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers, and Esters, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;

    State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers, and Esters, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;

    Department of Chemistry, Dalhousie University, Halifax, NS, B3H 4R2, Canada;

    Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;

    State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers, and Esters, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;

    State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers, and Esters, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;

    State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers, and Esters, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;

    Department of Chemistry, Dalhousie University, Halifax, NS, B3H 4R2, Canada;

    National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan;

    National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan;

    State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers, and Esters, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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  • 入库时间 2022-08-18 02:52:25

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