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Catalytic Decomposition of Toxic Chemicals Over Iron Group Metals Supported on Carbon Nanotubes

机译：碳纳米管支撑的铁族金属上有毒化学物质的催化分解

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This study explores catalytic decomposition of phosphine (PH_3) using iron group metals (Co, Ni) and metal oxides (Fe_2O_3, Co_3O_4, NiO) supported on carbon nanotubes (CNTs). The catalysts are synthesized by means of a deposition-precipitation method. The morphology, structure, and composition of the catalysts are characterized using a number of analytical instrumentations, including high-resolution transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, BET surface area measurement, and inductively coupled plasma. The activity of the catalysts in the PH_3 decomposition reaction is measured and correlated with their surface and structural properties. The characterization results show that phosphidation occurs on the catalyst surface, and the resulting metal phosphides act as an active phase in the PH_3 decomposition reaction. Cobalt phosphide, CoP, is formed on Co/CNTs and Co_3O_4/CNTs, whereas iron phosphide, FeP, is formed on Fe_2O_3/CNTs. In contrast, phosphorus-rich phosphide NiP_2 is formed on Ni/CNTs and NiO/CNTs. The initial activities of the catalysts are shown in the following sequence: Ni/CNTs ＞ Co/CNTs ＞ Co_3O_4/CNTS ＞NiO/CNTs ＞ Fe_2O_3/CNTs, whereas activities of metal phosphides are shown in the following order: CoP ＞ NiP_2 ＞ FeP. The catalytic activity of metal phosphides is attributed to their electronic properties. Cobalt phosphide formed on Co/CNTs and Co_3O_4/CNTs exhibits not only the highest activity, but also long-term stability in the PH_3 decomposition reaction.
机译：这项研究探索了使用负载在碳纳米管（CNT）上的铁族金属（Co，Ni）和金属氧化物（Fe_2O_3，Co_3O_4，NiO）催化膦（PH_3）的催化分解。催化剂通过沉积-沉淀法合成。催化剂的形态，结构和组成使用多种分析仪器进行表征，包括高分辨率透射电子显微镜，X射线衍射，X射线光电子能谱，BET表面积测量和电感耦合等离子体。测量了催化剂在PH_3分解反应中的活性，并将其与表面和结构性质相关联。表征结果表明，在催化剂表面上发生了磷酸化，并且所得的金属磷化物在PH_3分解反应中用作活性相。磷化钴CoP在Co / CNT和Co_3O_4 / CNT上形成，而磷化铁FeP在Fe_2O_3 / CNTs上形成。相反，在Ni / CNT和NiO / CNT上形成富含磷的磷化物NiP_2。催化剂的初始活性按以下顺序显示：Ni / CNTs＞ Co / CNTs＞ Co_3O_4 / CNTS＞ NiO / CNTs＞ Fe_2O_3 / CNTs，而金属磷化物的活性按以下顺序显示：CoP＞ NiP_2＞ FeP 。金属磷化物的催化活性归因于其电子性质。在Co / CNT和Co_3O_4 / CNT上形成的磷化钴不仅在PH_3分解反应中表现出最高的活性，而且具有长期稳定性。

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  • 来源
    《Environmental Science & Technology》 |2014年第6期|3372-3377|共6页
  • 作者

    Lili Li; Can Chen; Long Chen; Zixue Zhu; Jianli Hu;

  • 作者单位

    College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou 466001, People's Republic of China ,The Key Laboratory of Rare Earth Functional Materials and Application, Zhoukou Normal University, Zhoukou 466001, People's Republic of China;

    College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou 466001, People's Republic of China;

    College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou 466001, People's Republic of China;

    College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou 466001, People's Republic of China;

    China Datang Corporation Science and Technology Research Institute and China Datang Corporation Renewable Power Co., Limited, Beijing 100032, People's Republic of 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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