• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Tailored synthesis of CoOX thin films for catalytic application
【24h】

Tailored synthesis of CoOX thin films for catalytic application

机译：用于催化应用的CoOX薄膜量身定制的合成

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Cobalt oxide thin films were systematically synthesized on an inert carrier by pulsed-spray evaporation chemical vapor deposition (PSE-CVD). The effect of substrate temperature on the structure, morphology and surface composition of the prepared films was investigated by XRD, FTIR, SEM and XPS spectroscopies. An in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) and a gas chromatograph (GC) were involved to identify the surface and gaseous species occurring in the total oxidation of propene as a representative of VOCs, respectively. The structural analysis indicated that the obtained thin films transformed from CoO to pure Co3O4 spinel as the temperature rose from 350 to 450 degrees C. A homogeneous grain distribution was observed. For all samples, oxygen was mainly composed of lattice oxygen and adsorbed oxygen constituted a minor proportion. The catalytic tests showed that all the thin films exhibited competitive performances to those of noble metals. According to the observed adsorption peaks of propene at low-temperature and transformation of CoO-Co3O4 from the in situ DRIFTS spectra, a combined redox and L-H mechanism was proposed for the catalytic oxidation of propene over cobalt oxide films. The porous structure and adsorbed oxygen on the film surface may well contribute to the catalytic oxidation of propene.
机译：通过脉冲喷涂蒸发化学气相沉积（PSE-CVD）在惰性载体上系统地合成氧化钴薄膜。通过XRD，FTIR，SEM和XPS光谱研究了衬底温度对制备薄膜结构，形态和表面组成的影响。涉及原位漫反射红外傅里叶变换光谱（原位漂移）和气相色谱仪（GC），以鉴定在丙烯总氧化中的表面和气态物种分别作为VOC的代表。结构分析表明，随着温度从CoO到纯CO3O4尖晶石转化的所得薄膜从350升至450℃。观察到均匀的晶粒分布。对于所有样品，氧气主要由晶格氧和吸附的氧组成，构成较小的比例。催化试验表明，所有薄膜对贵金属的所有薄膜表现出具有竞争性表现。根据丙烯在低温下观察到的丙烯的吸附峰，从原位漂移光谱中，提出了一种氧化铈和L-H机理，用于催化氧化丁烯氧化物膜的催化氧化。膜表面上的多孔结构和吸附的氧可以有助于丙烯的催化氧化。

著录项

  • 来源
    《RSC Advances》 |2015年第118期|共7页
  • 作者

    Fan Shi-Bin; Pan Guan-Fu; Liang Jing; Tian Zhen-Yu;

  • 作者单位

    Chinese Acad Sci Inst Engn Thermophys Beijing 100190 Peoples R China;

    Chinese Acad Sci Inst Engn Thermophys Beijing 100190 Peoples R China;

    Chinese Acad Sci Inst Engn Thermophys Beijing 100190 Peoples R China;

    Chinese Acad Sci Inst Engn Thermophys Beijing 100190 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号