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Green Energy & Environment 2023年第2期8卷 538-547页

作者： Xunxun Li Yaru Wang Dongyun Chen Najun Li Qingfeng Xu Hua Li Jinghui He Jianmei Lu College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhouJiangsu215123China

Manganese oxide(MnO_(2))exhibits excellent activity for volatile organic compound ***,it is currently unknown whether lattice oxygen or adsorbed oxygen is more conducive to the progress of the catalytic *** this study,novel hollow highly dispersed Pt/Copper modified-MnO_(2)catalysts were ***^(2+)was stabilized into theδ-MnO_(2)cladding substituting original K+,which produced lattice defects and enhance the content of adsorbed *** 2.03 wt%Pt Cu_(0.050)-MnO_(2)catalyst exhibited the highest catalytic activity and excellent stability for toluene and benzene oxidation,with T_(100)=160℃under high space velocity(36,000 mL g^(-1)h^(-1)).The excellent performance of catalytic oxidation of VOCs is attributed to the abundant adsorbed oxygen content,excellent low-temperature reducibility and the synergistic catalytic effect between the Pt nanoparticles and Cu_(0.050)-MnO_(2).This study provides a comprehensive understanding of the Langmuir-Hinshelwood(L-H)mechanism occurring on the catalysts.

关键词： oxygen species Toluene Benzene d-MnO_(2) Hollow

The　Active　oxygen　species　for　Oxidative　Coupling　of　Methane　over　CeO_2/BaF_2　Catalyst　by　in　Situ　Confocal　Microprobe　Raman　Spectroscopy

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Chemical Research in Chinese Universities 1997年第1期13卷 93-95页

作者： LONG Rui qiang and WAN Hui lin (Department of Chemistry and State Key Laboratory for Physical Chemistry of the Solid Surface, Xiamen University, Xiamen, 361005) XIAMEN UNIV DEPT CHEMXIAMEN 361005PEOPLES R CHINA XIAMEN UNIV STATE KEY LAB PHYS CHEM SOLID SURFACEXIAMEN 361005PEOPLES R CHINA

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关键词： oxygen species Oxidative coupling Methane In situ Raman spectroscopy

Role of oxygen species and active phase of CuCeZrO_(x) prepared with bacterial cellulose for toluene catalytic oxidation

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Carbon Resources Conversion 2023年第4期6卷 255-261页

作者： Chenhang Zhang Chenchen Zhao Running Kang Qinglan Hao Baojuan Dou Feng Bin State Key Laboratory of High-Temperature Gas Dynamics Institute of MechanicsChinese Academy of ScienceBeijing 100190China Tianjin University of Science&Technology Tianjin 300457China

The present study investigates the active phases and the role of oxygen species in the toluene oxidation process over CuCeZrO_(x) catalysts prepared with bacterial cellulose(BC),and compares them with nitric acid pickling CuCeZrO_(x)-BC(H)and CeZrO_(x)-BC *** investigation is carried out using in-situ DRIFT,O_(2)-TPD,H_(2)-TPR,XRD,and TEM *** findings suggest that dispersed CuO species on the catalyst surface,Cu-Ce-Zr-O,and Ce-Zr-O solid solutions are active for toluene oxidation over CuCeZrO_(x)-BC,with corresponding activities decreasing *** in-situ DRIFT results demonstrate that gaseous oxygen facilitates the chemisorption of toluene on active oxygen species,forming benzoyl oxide species and partially oxidizing the absorbed intermediates to benzyl alcohol at room ***,lattice oxygen is experimentally found to be involved in the deep oxidation of toluene,and the lattice oxygen present in dispersed CuO species dominates the toluene oxidation process over CuCeZrO_(x)-BC.

关键词： Cu-Ce-Zr catalyst oxygen species Active phase In-situ DRIFT Catalytic oxidation

Synergistic effect of oxygen species and vacancy for enhanced electrochemical CO_(2) conversion to formate on indium oxide

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eScience 2024年第3期4卷 134-141页

作者： Tengfei Ma Zihao Jiao Haoran Qiu Feng Wang Ya Liu Liejin Guo International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi'an Jiaotong UniversityXi'an 710049China

Indium-based oxides are promising electrocatalysts for producing formate via CO_(2) reduction reaction,in which*OCHO is considered the key ***,we identified that the*COOH pathway could be preferential to produce formate on In_(2)O_(3)of In/In_(2)O_(3) heterojunction due to the synergistic effect of oxygen species and ***,*CO_(2) and *COOH were observed on In_(2)O_(3) and related to formate production by in situ Raman *** theoretical calculations further demonstrated that the energy barrier of the*COOH formation on In_(2)O_(3) was decreased in the presence of oxygen vacancy,similar to or lower than that of the*OCHO formation on the In *** a result,a formate selectivity of over 90%was obtained on prepared In/In_(2)O_(3) heterojunction with 343±7mAcm^(-2) partial current ***,when using a Si-based photovoltaic as an energy supplier,10.11%solar-to-fuel energy efficiency was achieved.

关键词： Electrocatalytic CO_(2)reduction Formate In_(2)O_(3) oxygen species oxygen vacancy

Study of Reactivity of oxygen species on SmMO_3(M=Mn,Fe)by TDS and TPRS

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Journal of Rare Earths 1993年第1期11卷 63-65页

作者：楼辉马福泰毛祖遂李海洋徐亚伯 Hangzhou University Hangzhou 310028China Zhejiang University Hangzhou 310027China

With O_2 and CO as the molecular probes,the reactivity of oxygen species of perovskite-like oxides SmMnO_3 and SmFeO_3 was studied by thermodesorption spectroscopy(TDS)and temperature- programmed reaction spectroscopy(TPRS)in an ultrahigh vacuum *** results of the experiment implied that the oxidation of CO on SmMO_3 may follow Langmuir-Hinshelwood mechanism.

关键词： SmMnO_3 SmFeO_3 TDS TPRS oxygen species

Analysis of different oxygen species on Cu2O(111) surface by DFT calculations

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Analysis of different oxygen species on Cu2O(111) surface by...

Catalytically active interfaces in titania nanorod-supported copper catalysts for CO oxidation

第十一届全国环境催化与环境材料学术会议

作者： Yangyang Song Guichang Wang Institute of Catalysis for Energy and Environment College of Chemistry and Chemical EngineeringShenyang Normal University College of Chemistry Nankai University

The HOMO distributions for the lattice oxygen (O), absorbed atomic oxygen (O*), and absorbed molecular oxygen (O*) on CuO(111) surface calculated through the magnetization density are shown in Fig. 1. It is well known that the Olattice in stoichiometric CuO(111) bulk represents O, and can be expressed in Fig. 1a with no single electron in atomic orbitals. Fig. 1b shows a single electron in p atomic orbitals of the O*with the Bader charges of around-0.8|e|,

关键词： Cuprous oxide(111) oxygen species HOMO DFT calculations

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Nano Research 2020年第2期13卷 533-542页

作者： Wasim U.Khan Season S.Chen Daniel C.W.Tsang Wey Yang Teoh Xijun Hu Frank L.Y.Lam Alex C.K.Yip Department of Chemical and Process Engineering The University of Canterbury Christchurch 8041New Zealand Department of Civil and Environmental Engineering.The Hong Kong Polytechnic University Hong Kong.China School of Chemical Engineering The University of New South WalesSydneyNSW 2052Australia Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyHong KongChina

One-dimensional titanium dioxide nanorod(TNR)-supported Cu catalysts(2.5 wt.%-12.5 wt.%)were synthesized using deposition-precipitation.X-ray photoelectron spectroscopy,temperature programmed reduction and CO chemisorption measurements showed that Cu doping over TNR offered metal-support interactions and interfacial active sites that had a profound impact on the catalytic *** role of the Cu-TNR interface was investigated by comparing the catalytic activity of Cu-TNR catalysts with that of pure CuO nanoparticles in CO *** presence of highly dispersed copper species,a high number of interfacial active sites,CO adsorption capacity and surface/lattice oxygen were found to be responsible for the excellent activity of 7.5CU-TNR(ie,Cu loading of 7.5 wt.%on TNR).Moreover,the Cu-TNR catalysts followed the Langmuir-Hinshelwood reaction mechanism with 7.5CU-TNR,exhibiting an apparent activation energy of 44.7 kJ/*** TNR-supported Cu catalyst gave the highest interfacial catalytic activity in medium-temperature CO oxidation(120-240℃)compared to other commonly used supports,including titanium dioxide nanoparticles(TiO2-P25),silica(SiO2)and alumina(Al20g)in which copper species were nonhomogeneously *** study confirms that medium-temperature CO oxidation is highly sensitive to the morphology and structure of the supporting material.

关键词： supported catalysts nanorod oxygen species interfacial active sites CO oxidation

Physiological responses and detoxific mechanisms to Pb,Zn,Cu and Cd in young seedlings of Paulownia fortunei

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Journal of Environmental Sciences 2010年第12期22卷 1916-1922页

作者： Jiang Wang Weihua Li Chongbang Zhang Shisheng Ke School of Life Sciences Taizhou University Linhai 317000 China Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education College of Life Sciences South China Normal University Guangzhou 510631 China

Paulownia fortunei has been successfully used in the phytoremediation of many Pb/Zn mine tailings. However, seed germination and young seedlings of P. fortunei rarely occurred in these mine tailings. The physiological responses and detoxific mechanisms of P. fortunei young seedling to Pb, Zn, Cu and Cd stress were investigated. The germinated rate, shoot length, chlorophyll and carotenoid contents in leaves of young seedlings had a great reduction under Zn and Cu treatments, but had little decrease under Pb and Cd treatments. The production rate of O2＊-, H2O2 and malondialdehyde （MDA） contents significantly increased in response to added Zn and Cu indicating great oxidative stress for young seedlings, but they had no significant change to added Pb and Cd. Young seedlings had effective detoxific mechanism to Pb and Cd, as antioxidant enzymes activities, phytochelatins （PCs-SH） and proline contents increased with increasing rates of added Pb and Cd. However, young seedlings had un-effective detoxific mechanisms to Zn and Cu stress. Results revealed the heavy metals （such as Ca） that present at low concentrations in mine tailings may be major constraint for the survival of young seedlings.

关键词： heavy metals defense system oxygen species antioxidant enzyme phytochelatins

Catalytic Preparation of Methyl Formate from Methanol over Silver

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Chemical Research in Chinese Universities 2005年第5期21卷 573-576页

作者： YANG Zhi LI Jing YANG Xiang-guang WU Yue Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China Graduate School Chinese Academy of Sciences Belting 100039 P. R. China

A catalytic reaction over a silver catalyst performed in an unregarded temperature region（473-873 K） with a long catalytic lifetime for the production of methyl formate from methanol was provided as a potential preparing route. The optimal yield of methyl formate（ca. 14. 8% ） with a selectivity 〉90% was obtained at about 573 K. Because α- oxygen species and bulk oxygen species coexist in the unregarded temperature region, a synergistic process concerning α-oxygen species and bulk oxygen species was proved over Oα -rich and Oγ-rich samples.

关键词： Silver Methanol Methyl formate oxygen species Svnergistic effect

Study on oxidation of Gd film grown on Ni(110) surface by synchrotron radiation photoemission

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Progress in Natural Science:Materials International 1999年第10期9卷 34-40页

作者：徐法强朱俊发孙玉明王险峰陆尔东徐彭寿张新夷庄叔贤 China Department of Chemical Physics Hefei 230029 National Synchrotron Radiation laboratory University of Science and Technology of China

Soft X-ray synchrotron radiation photoemission and X-ray photoelectron spectroscopy ( XPS) were used to study the interaction of oxygen with Gd overlayers grown in situ on Ni(110) surface and with the Gd-Ni composite film. oxygen showed a large primary sticking coefficient on a 3.7 nm-thick Gd film. The high binding energy(BE) peak in the double-peak ot Gd 4f emission attenuated with the increase of oxygen exposure and almost disappeared when the specimen was annealed at 800 K after a 50 L coverage. The O 1s XPS spectra exhibited only one peak attributed to lattice oxygen at 529.6 eV in the range of 0-50 L exposure. Over the surface of composite film prepared by slight oxidation and high temperature (1000 K) annealing treatment of 0.63 nm Gd film, the adsorption of oxygen resulted in the surface segregation and oxidation of Gd component. Two kinds of oxygen species, the chemisorbed 0 ion and lattice oxygen, were detected. The oxidation mechanism of Gd film as well as the nature and evolution of the surf

关键词： Gd film synchrotron radiation photoemission Ni(110) surface oxygen adsorption oxygen species