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Synergetic ternary metal oxide nanodots-graphene cathode for high performance zinc energy storage

Chinese Chemical Letters 2020年第9期31卷 2358-2364页

作者： Lijun Su Lingyang Liu Yue Wang Yulan Lu Xingbin Yan Laboratory of Clean Energy Chemistry and Materials Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Physical Science and Technology Lanzhou UniversityLanzhou 730000China Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalian 116023China

Zinc-based electrochemistry ene rgy sto rage with high safety and high theoretical capacity is considered to be a competitive candidate to replace lithium-ion *** electrochemical energy storage,multimetal oxide cathode materials can generally provide a wider electrochemical stability window and a higher capacity compared with single metal oxides ***,a new type of cathode material,MnFe2Co3O8 nanodots/functional graphene sheets,is designed and used for aqueous hybrid Zn-based energy *** with a hybrid electrolyte based on zinc sulfate and potassium hydroxide,the asfabricated battery was able to work with a wide electrochemical window of 0.1~1.8 V,showed a high specific capacity of 660 mAh/g,delivered an ultra high energy density of 1135 Wh/kg and a scalable power density of 5754 W/kg(calculated based on the cathode),and displayed a long cycling life of 1000 *** are mainly attributed to the valence charge density distribution in MnFe2Co3O8 nanodots,the good structural strengthening as well as high conductivity of the cathode,and the right *** cathode material also exhibited high electrocatalytic activity for oxygen evolution reaction and thus could be used for constructing a Zn-air battery with an ultrahigh reversible capacity of 9556 mAh/g.

关键词： Hybrid zinc battery Cathode ternary metal oxide Energy storage Electrochemical performance

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ternary metal–Organic Framework Derived 2D Fe_(2)O_(3)/Co_(3)O_(4)/NiO/NC Heterostructured Nanosheets for Super Lithium Storage

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Acta metallurgica Sinica(English Letters) 2022年第8期35卷 1376-1382页

作者： Yongjun Zheng Rui Sun Zhaoxia Qin Xinlong Liu Yufei Zhang Haibin Wang Haosen Fan School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou510006China School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China College of Civil Aviation Safety Engineering Civil Aviation Flight University of ChinaGuanghan 618307China

Fe_(2)O_(3)/Co_(3)O_(4)/NiO/NC nanosheets have been successfully prepared via a two-step annealing process of ternary metal coordination polymer. Attributing to the synergistic effects of the multiple metal oxides and the unique 2D nanosheet structure, the improved electrical conductivity and effective electron/ion transfer enables Fe_(2)O_(3)/Co_(3)O_(4)/NiO/NC electrode to exhibit excellent electrochemical properties with outstanding rate capacity and cycling stability. This work may pave the way to construct ternary metal oxide electrode material with an excellent electrochemical performance by introducing multiple metal oxides.

关键词： Nanosheets ternary metal-organic framework Lithium-ion batteries Fe_(2)O_(3) Co_(3)O_(4) NiO NC ternary metal oxide

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Sulfur dioxide sensing properties of MOF-derived ZnFe_(2)O_(4) functionalized with reduced graphene oxide at room temperature

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Rare metals 2021年第6期40卷 1604-1613页

作者： Lan-Juan Zhou Xi-Xi Zhang Wen-Yuan Zhang College of Control Science and Engineering China University of Petroleum(East China)Qingdao 266580China United Microelectronics Center Chongqing 401332China

In this paper,ZnZnFe_(2)O_(4) nanorods were prepared using Zn/Fe metal organic framework(MOF)as precursors,and ZnZnFe_(2)O_(4)/reduced graphene oxide(rGO)was prepared by hydrothermal *** morphology and composition of the ZnZnFe_(2)O_(4)/rGO nanocomposite were characterized,and the results showed that the MOF-derived ZnZnFe_(2)O_(4) nanorods are uniformly modified on the surface of *** ZnZnFe_(2)O_(4)/rGO nanocomposite exhibits better SO_(2) gas sensing performance than the single ZnZnFe_(2)O_(4) nanorods at room *** sensing characteristics of single ZnZnFe_(2)O_(4) film sensor,single rGO film sensor and ZnZnFe_(2)O_(4)/rGO composite film sensor at SO_(2)gas concentration(1×10^(-6)-100×10^(-6))were *** response of ZnZnFe_(2)O_(4)/rGO composite sensor can reach 18.32%at room *** with single ZnZnFe_(2)O_(4) and rGO film sensors,the ZnZnFe_(2)O_(4)/rGO composite sensor has better transient response,good sensitivity and *** this work,the improvement of the sensor performance is not only due to the p-n heterostructure between ZnZnFe_(2)O_(4) nanorods and rGO nanosheets,but also to the excellent electrical properties of *** provides a new idea for the detection of SO_(2) at room temperature.

关键词： ternary metal oxide ZnFe_(2)O_(4)nanorods Reduced graphene oxide SO_(2)gas sensor

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Nanostructured BiVO4 Derived from Bi-MOF for Enhanced Visible-light Photodegradation

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Chemical Research in Chinese Universities 2020年第1期36卷 120-126页

作者： CHEN Jianfei CHEN Xiaoyu ZHANG Xing YUAN Yao BI Ruyi YOU Feifei WANG Zumin YU Ranbo Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Key Laboratory of Advanced Material Processing&Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002P.R.China

BiVO4,a promising visible-light responding photocatalyst,has aroused extensive research interest because of inexpensiveness and excellent chemical ***,its main drawback is the poor photoinduced charge-transfer *** nanostructures is an effective way to tackle this ***,we put forward a new method to prepare nanostructured BiVO4 from Bi-based metal-organic frameworks[Bi-MOF(CAU-17)]*** as-prepared material has a rod-like morphology inherited from the Bi-MOF sacrificial template and consists of small nanoparticle as building *** with its counterparts prepared by conventional methods,MOF-derived nanostructured BiVO4 shows better light absorption ability,narrower bandgap,and improved electrical conductivity as well as reduced ***,BiVO4 nanostructure demonstrates high photocatalytic activity under visible light towards the degradation of methylene *** blue can be degraded up to 90%within 30 min with a reaction rate constant of 0.058 ***,the cycling stability of the catalyst is excellent to withstand unchanged degradation efficiency for at least 5 cycles.

关键词： BiVO4 Nanostructure metal-organic framework ternary metal oxide Photocatalysis

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Screening of MgO- and CeO_2-Based Catalysts for Carbon Dioxide Oxidative Coupling of Methane to C_(2+) Hydrocarbons

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Journal of Natural Gas Chemistry 2004年第1期13卷 23-35页

作者： Istadi Nor Aishah Saidina Amin Chemical Reaction Engineering Group(CREG) Faculty of Chemical and Natural Resources EngineeringUnivevsiti Teknologi MalaysiaUTM SkudaiJohor Bahru81310 Malaysia

The catalyst screening tests for carbon dioxide oxidative coupling of methane (CO2-OCM) have been investigated over ternary and binary metal oxide catalysts. The catalysts are prepared by doping MgO- and CeO2-based solids with oxides from alkali (Li2O), alkaline earth (CaO), and transition metal groups (WO3 or MnO). The presence of the peroxide (O2-2) active sites on the Li2O2, revealed by Raman spectroscopy, may be the key factor in the enhanced performance of some of the Li2O/MgO catalysts. The high reducibility of the CeO2 catalyst, an important factor in the CO2-OCM catalyst activity, may be enhanced by the presence of manganese oxide species. The manganese oxide species increases oxygen mobility and oxygen vacancies in the CeO2 catalyst. Raman and Fourier Transform Infra Red (FT-IR) spectroscopies revealed the presence of lattice vibrations of metal-oxygen bondings and active sites in which the peaks corresponding to the bulk crystalline structures of Li2O, CaO, WO3 and MnO are detected. The performance of 5%MnO/15%CaO/CeO2 catalyst is the most potential among the CeO2-based catalysts, although lower than the 2%Li2O/MgO catalyst. The 2%Li2O/MgO catalyst showed the most promising C2+ hydrocarbons selectivity and yield at 98.0% and 5.7%, respectively.

关键词： catalyst screening carbon dioxide oxidative coupling methane ternary metal oxide binary metal oxide MgO CeO2 C2+ hydrocarbons

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