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首页> 外文期刊>Applied Surface Science >Well-crystallized ZnCo2O4 nanosheets as a new-style support of Au catalyst for high efficient CO preferential oxidation in H-2 stream under visible light irradiation
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Well-crystallized ZnCo2O4 nanosheets as a new-style support of Au catalyst for high efficient CO preferential oxidation in H-2 stream under visible light irradiation

机译：结晶良好的ZnCo2O4纳米片作为Au催化剂的新型载体，可在可见光照射下在H-2流中进行高效CO优先氧化

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摘要

A kind of high dispersed gold catalyst supported on the spinel ZnCo2O4 nanosheets was readily fabricated by a facile template-free wet chemical method for CO oxidation in H-2-rich streams at room temperature under visible light irradiation or not, which was found to be a high performance catalyst. As verified by X-ray powder diffractometry (XRD), Raman spectra, N-2 adsorption-desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS), Xray photoelectron spectroscope (XPS), photoelectrochemical measurement and photoluminescence (PL) spectra results, the contribution of high crystallinity, the enhanced mass and charge transport, the longer lifetime of surface electrons as well as the optical absorbance properties on Au/ZnCo2O4 enabled the superior CO preferential oxidation. Notably, electron paramagnetic resonance (EPR) and CO chemisorption (TPD-MS) results indicate that visible light could promote the adsorption and activation of both CO and O-2 at Au/ZnCo2O4 due to both the photo-response of Au nanoparticles and the photo-excitation of ZnCo2O4 band gap under visible light irradiation. This study indicates that Au/ZnCo2O4 may be highly desirable for a promising photo-assisted Au catalyst. (C) 2016 Elsevier B.V. All rights reserved.
机译：无论是在室温下还是在可见光照射下，通过简便的无模板湿化学方法在富H-2的气流中进行CO氧化，都可以轻松地制得一种负载在尖晶石ZnCo2O4纳米片上的高分散金催化剂。高性能催化剂。经X射线粉末衍射（XRD），拉曼光谱，N-2吸附-解吸，扫描电子显微镜（SEM），透射电子显微镜（TEM），漫反射光谱（DRS），X射线光电子能谱（XPS）验证，光电化学测量和光致发光（PL）光谱结果，高结晶度的贡献，增强的质量和电荷传输，更长的表面电子寿命以及在Au / ZnCo2O4上的吸光度特性使得能够实现出色的CO优先氧化。值得注意的是，电子顺磁共振（EPR）和一氧化碳化学吸附（TPD-MS）结果表明，由于金纳米颗粒的光响应和碳纳米管的光响应，可见光可以促进一氧化碳和氧气在Au / ZnCo2O4上的吸附和活化。可见光照射下ZnCo2O4带隙的光激发。这项研究表明，Au / ZnCo2O4对于有前途的光助金催化剂可能是非常需要的。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2017年第ptab期|635-644|共10页
  • 作者

    Yang Kai; Zhang Yujuan; Meng Chao; Cao FangFang; Chen Xun; Fu Xianzhi; Dai Wenxin; Yu Changlin;

  • 作者单位

    Fuzhou Univ, Res Inst Photocatalysis, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Peoples R China|Jiangxi Univ Sci & Technol, Sch Met & Chem Engn, Ganzhou 341000, Jiangxi, Peoples R China;

    Fuzhou Univ, Res Inst Photocatalysis, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Peoples R China;

    Fuzhou Univ, Res Inst Photocatalysis, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Peoples R China;

    Jiangxi Univ Sci & Technol, Sch Met & Chem Engn, Ganzhou 341000, Jiangxi, Peoples R China|State Key Lab Adv Technol Float Glass Technol, Bengbu 233000, Peoples R China;

    Fuzhou Univ, Res Inst Photocatalysis, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Peoples R China;

    Fuzhou Univ, Res Inst Photocatalysis, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Peoples R China;

    Fuzhou Univ, Res Inst Photocatalysis, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Peoples R China;

    Jiangxi Univ Sci & Technol, Sch Met & Chem Engn, Ganzhou 341000, Jiangxi, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Au/ZnCo2O4; Spinel structure; Nanosheets; Visible-light; CO preferential oxidation;

    机译：Au / ZnCo2O4;尖晶石结构;纳米片;可见光;CO优先氧化;

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