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首页> 外文期刊>Environmental Science & Technology >HCI-Tolerant H_xPO_4/RuO_x-CeO_2 Catalysts for Extremely Efficient Catalytic Elimination of Chlorinated VOCs
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HCI-Tolerant H_xPO_4/RuO_x-CeO_2 Catalysts for Extremely Efficient Catalytic Elimination of Chlorinated VOCs

机译：HCI耐受H_XPO_4 / RUO_X-CEO_2催化剂，用于极其有效的氯化VOC的催化消除

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摘要

Bulk metal doping and surface phosphate modification were synergically adopted in a rational design to upgrade the CeO_2 catalyst, which is highly active but easily deactivated for the catalytic oxidation of chlorinated volatile organic compounds (Cl-VOCs). The metal doping increased the redox ability and defect sites of CeO_2, which mostly promoted catalytic activity and inhibited the formation of dechlorinated byproducts but generated polychlorinated byproducts. The subsequent surface modification of the metal-doped CeO_2 catalysts with nonmetallic phosphate completely suppressed the formation of polychlorinated byproducts and, more importantly, enhanced the stability of the surface structure by forming a chainmail layer. A highly active, durable, and selective catalyst of phosphate-functionalized RuO_x-CeO_2 was the most promising among all the metal-doped (Ru, Pd, Pt, Cr, Mn, Fe, Co, and Cu) CeO_2 catalysts investigated owing to the prominent chemical stability of RuO_x and its superior versatility in the catalytic oxidation of different kinds of Cl-VOCs and other typical pollutants, including dimethyl sulfide, CO, and C_3H_8. Moreover, the chemical stability of the catalyst, including its bulk and surface structural stability, was investigated by combining intensive treatment with HCl/H_2O or HC1 with subsequent ex situ ultraviolet-visible light Raman spectroscopy and confirmed the superior resistance to Cl poisoning of the phosphate-functionalized RuO_x-CeO_2. This work exemplifies a promising strategy for developing ideal catalysts for the removal of Cl-VOCs and provides a catalyst with the superior catalytic performance in Cl-VOC oxidation to date.
机译：散装金属掺杂和表面磷酸盐改性在理性设计中进行了协同采用，以升级CEO_2催化剂，其高活性但容易停用氯化挥发性有机化合物（CL-VOC）的催化氧化。金属掺杂增加了CeO_2的氧化还原能力和缺陷位点，其主要促进催化活性并抑制了脱氯的形成，但产生了多氯化合物的副产物。随后的具有非金属磷酸盐的金属掺杂CeO_2催化剂的后续表面改性完全抑制了多氯化氯化的副产物的形成，更重要的是，通过形成链条层来增强表面结构的稳定性。磷酸盐官能化ruo_x-CeO_2的高活性，耐用和选择性催化剂是所有金属掺杂（Ru，Pd，Pt，Cr，Mn，Fe，Co和Cu）CeO_2催化剂所承诺的最有希望的ruo_x的突出化学稳定性及其在不同种类催化氧化中的优异多功能性，包括二甲基硫化物，CO和C_3H_8。此外，通过将密集的处理与HCl / H_2O或HCl与随后的诸如原位紫外 - 可见光的光拉曼光谱相结合，研究了催化剂的化学稳定性，包括其体积和表面结构稳定性，并证实了磷酸盐中毒的优异抗性 - 功能化ru_x-ceo_2。该作品举例说明了用于制定用于去除CL-VOC的理想催化剂的有希望的策略，并在CL-VOC氧化中提供具有优异催化性能的催化剂。

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  • 来源
    《Environmental Science & Technology》 |2021年第6期|4007-4016|共10页
  • 作者

    Qjguang Dai; Kai Shen; Wei Deng; Yuanpu Cai; Jiaorong Yan; Jinyan Wu; Limin Guo; Rui Liu; Xingyi Wang; Wangcheng Zhan;

  • 作者单位

    Key Laboratory for Advanced Materials Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 200237 P. R. China;

    Key Laboratory for Advanced Materials Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 200237 P. R. China;

    School of Environmental Science and Technology Huazhong University of Science and Technology Wuhan 430074 P. R. China;

    Key Laboratory for Advanced Materials Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 200237 P. R. China;

    Key Laboratory for Advanced Materials Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 200237 P. R. China;

    Key Laboratory for Advanced Materials Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 200237 P. R. China;

    School of Environmental Science and Technology Huazhong University of Science and Technology Wuhan 430074 P. R China;

    State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 P. R. China;

    Key Laboratory for Advanced Materials Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 200237 P. R. China;

    Key Laboratory for Advanced Materials Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 200237 P. R. 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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