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A novel Cu_(1.5)Mn_(1.5)O_(4)photothermal catalyst with boosted surface lattice oxygen activation for efficiently photothermal mineralization of toluene

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Nano Research 2023年第2期16卷 2133-2141页

作者： Qiang Cheng Zhuangzhuang Wang Xiaotian Wang Jiaming Li Yuan Li Gaoke Zhang Shenzhen Research Institute Hubei Key Laboratory of Mineral Resources Processing and EnvironmentState Key Laboratory of Silicate Materials for ArchitecturesWuhan University of TechnologyWuhan 430070China

Developing a novel photothermal catalyst for efficient mineralization of volatile organic compounds(VOCs)is of great significance to control air ***,for the first-time,a spinel Cu_(1.5)Mn_(1.5)O_(4)nanomaterial with enhanced surface lattice oxygen activation was successfully obtained by a novel light-driven in situ reconstruction strategy from its precursor(CuMnO_(2))for efficient toluene mineralization.X-ray diffraction(XRD)and high-resolution transmission electron microscopy(HRTEM)analyses confirm that the CuMnO_(2)phase was converted into spinel Cu1.5Mn1.5O4 phase under full spectrum light ***–visible–near infrared ray(UV–vis–NIR)spectroscopy,X-ray photoelectron spectroscopy(XPS)analysis,and density functional theory(DFT)calculations determine that the strong near-infrared absorption ability and low dissociation energy of oxygen bond in Cu_(1.5)Mn_(1.5)O_(4)are beneficial to its surface lattice oxygen ***,O2-temperature programmed desorption(TPD)and in situ diffuse reflectance infrared transform spectroscopy(DRIFTS)further indicate that the surface lattice oxygen of the Cu_(1.5)Mn_(1.5)O_(4)is easily activated under light irradiation,which can promote ring opening of *** research endows a new design of photothermal nanomaterial with enhanced lattice oxygen activation for deep oxidation of VOCs.

关键词： Cu_(1.5)Mn_(1.5)O_(4)nanomaterial surface lattice oxygen light-driven photothermal catalysis volatile organic compounds

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Relationship between oxygen species and activity/stability in heteroatom(Zr,Y)-doped cerium-based catalysts for catalytic decomposition of CH_3SH

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Chinese Journal of Catalysis 2018年第12期39卷 1929-1941页

作者： Dingkai Chen Dehua Zhang Dedong He Jichang Lu Liping Zhong Caiyun Han Yongming Luo Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500YunnanChina Faculty of Chemical Engineering Kunming University of Science and TechnologyKunming 650500YunnanChina

CeO2,Ce1–xZrxO2,and Ce1–xYxO2–δ(x=0.25,0.50,0.75,and 1.00)have been rapidly synthesized to estimate their catalytic behavior in decomposing *** role of oxygen vacancies,and the relationship between the oxygen species and catalytic properties of CeO2 and Zr‐doped and Y‐doped ceria‐based materials are investigated in *** the observed catalytic performance with the characterization results,it can be deemed that surface lattice oxygen plays a critical role in methanethiol catalytic conversion over cerium ***0.75Zr0.25O2 shows higher catalytic activity for CH3SH decomposition due to the large amount of surface lattice oxygen,readily available oxygen species,and excellent redox ***0.75Y0.25O2–δdisplays better catalytic stability owing to the greater number of oxygen vacancies that would promote bulk lattice oxygen migration to the surface of the catalyst in order to replenish surface lattice *** addition,the results show that the difference in chemical valence between Ce and the heteroatoms would strongly influence the amount of surface lattice oxygen as well as the mobility of bulk‐phase oxygen in these catalysts,thus affecting their activity and stability.

关键词： Cerium‐base catalyst Heteroatom surface lattice oxygen CH3SH decomposition Bulk oxygen migration

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Preparation of cubic-tetragonal interface catalyst of CeO2-ZrO2 and its effect on catalytic diesel soot oxidation

Preparation of cubic-tetragonal interface catalyst of CeO2-Z...

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第十届全国催化剂制备科学与技术研讨会（成都）

作者：杨铮铮胡伟张纳黎云祥廖运文 China West Normal University

Rational design of catalyst interface is crucial for the improvement of catalytic performance. Herein, a cubic-tetragonal interface catalyst of CeO-ZrO solid solutions, CeO-ZrO(C-T), was synthesized by using a solvothermal method. The catalytic evaluation for soot oxidation on the prepared CeO-ZrO(C-T) interface catalyst was compared with the current commercial CeZrLaPrOx and CeO-ZrO soot oxidation catalysts;meanwhile, a systematic characterization was employed on the catalysts.

关键词： Soot combustion Exhaust purification interface catalyst surface lattice oxygen oxygen vacancy

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