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Chinese Chemical Letters 2024年第3期35卷 40-51页

作者： Si Sun Shuang Song Shuai Yang Yong-Li He Yang Shi Peng Zhou Zhao-kun Xiong Yang Liu Heng Zhang Ye Du Chuan-Shu He Bo Lai State Key Laboratory of Hydraulics and Mountain River Engineering College of Architecture and EnvironmentSichuan UniversityChengdu 610065China Sino-German Centre for Water and Health Research Sichuan UniversityChengdu 610065China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaSichuanChengdu 610054China

manganese oxides(MNO_(x)),as low-toxicity and high-abundance catalysts,have been demonstrated to hold great promise for application in advanced oxidation processes(AOPs).However,further application of this material is restricted due to its unsatisfactory oxidant activation ***,recently remarkable research on deep activation mechanisms and modification of MNO_(x)have been undertaken to improve its ***,modification enhancement mechanisms of MNO_(x)to efficiently degrade various organic contaminants were discussed and highlighted,including metal doping,coupling with other metal oxides,composite with carbonaceous material,and compounding with other *** activation mechanisms of different MNO_(x)and derivative-modified material(such as doped MNO_(x),metal oxide-MNO_(x)hybrids,and MNO_(x)-carbonaceous material hybrids)were summarized in great details,which was specifically categorized into both radical and non-radical *** effects of pH,inorganic ions,and natural organic matter on degradation reactions are also ***,future research directions and perspectives are presented to provide a clear interpretation on the MNO_(x)initiated AOPs.

关键词： manganese oxide Derivative-modified materials Modification enhancement mechanisms Advanced oxidation process Activation mechanism

Preparation of manganese oxide and Its Adsorption Properties

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Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 1031-1040页

作者：贺跃王海峰 YANG Pan WANG Song CHEN Xiaoliang YANG Chunyuan 王家伟 School of Materials and Metallurgy Guizhou UniversityGuiyang 550025China Guizhou Provincial Engineering Technology Research Center of manganese Materials for Batteries Tongren Guizhou 554300China Guizhou Provincial Key Laboratory of Metallurgical Engineering and Energy Saving Guiyang 550025China

The in-situ oxidation of manganese sulfate solution with H2O_(2),sodium hypochlorite,potassium permanganate and oxygen as oxidants was investigated by means of SEM,EDS,XRD,BET and infrared analysis,and the effects of different oxidants on the morphology,phase composition,surface properties and specific surface area of manganese oxides were *** experimental results show that the diameter of manganese oxide particles prepared with H_(2)O_(2)is the smallest,about 50 nm,and the specific surface area is the largest,63.8764 m^(2)/*** has the advantages of abundant surface hydroxyl groups,no introduction of other impurities and large adsorption *** is most suitable to be used as an oxidant for oxidizing manganese sulfate solution to prepare manganese oxide by in-situ *** manganese oxide prepard by H_(2)O_(2)in-situ oxidation method is used as adsorbent to adsorb cobalt and nickel impurities in manganese *** the reaction pH is 6,the reaction time is 30min and the amount of adsorbent is 1.0 g,the adsorption rates of cobalt and nickel impurities in 100ml manganese sulfate solution are 97.59%and 97.67%,*** residual amounts of cobalt and nickel meet the industrial process standard of first-class products(Co,Ni w/%≤0.005)of high-purity manganese sulfate(Hg/t4823-2015)for *** study plays a guiding role in the preparation and regulation of manganese oxide,and provides a new method with high efficiency,purity and adsorbent availability for the preparation of high-purity manganese sulfate solution.

关键词： manganese oxide in situ oxidation adsorbent regulation mechanism physical chemical properties

Hydrothermal synthesis of manganese oxide encapsulated multiporous carbon nanofibers for supercapacitors

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Nano Research 2016年第9期9卷 2672-2680页

作者： Haiyan Wang Jiang Deng Yiqing Chen Fan Xu Zhongzhe Wei Yong Wang Advanced Materials and Catalysis Group ZJU-NHU United R&D CenterCenter for Chemistry of High-Performance and Novel MaterialsDepartment of ChemistryZhejiang UniversityHangzhou 310028China

Hydrothermal carbonization (HTC) of biomass to produce one-dimensional carbon materials with hierarchical pores is of significant importance. Here, we fabricate composites of MnOx-encapsulated multiporous carbon nanofibers (M-MCNFs) from naturally available carbohydrates through a dopamine-assisted HTC/ templating process. The introduction of dopamine aids in the formation of the morphology of carbon nanofibers (CNFs) by enhancing the interactions between the hard-templates and carbohydrates. The chosen cryptomelane hard-templates, which are superior to traditional hard-templates, are converted into Mn3O4nanoparticles embedded in multiporous CNFs (MCNFs), eliminating the need for tedious post deposition procedures to introduce redox active sites. Hence, the obtained hybrids with large surface areas, hierarchical pores, and unique structures show great potential in supercapacitors. This economic and sustainable strategy paves a new way for synthesizing MCNFs and metal oxide-encapsulated MCNFs composites from biomass. [Figure not available: see fulltext.] © 2016, Tsinghua University Press and Springer-Verlag Berlin Heidelberg.

关键词： hydrothermal carbonization multiporous carbon nanofiber manganese oxide encapsulated supercapacitor

Extreme biomimetics： A carbonized 3D spongin scaffold as a novel support for nanostructured manganese oxide（IV） and its electrochemical applications

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Nano Research 2018年第8期11卷 4199-4214页

作者： Tomasz Szatkowski Kacper Kopczynski Mykhailo Motylenko Horst Borrmann Beata Mania Matgorzata Gras Grzegorz Lota Vasilii V. Bazhenov David Rafaja Friedrich Roth Juliane Weise Enrico Langer Marcin Wysokowski Sonia Zoltowska-Aksamitowska laroslav Petrenko Serguei L, Molodtsov Jana Hubalkova Christos G. Aneziris Yvonne Joseph Allison L. Stelling Hermann Ehrlich Teofil Jesionowski Institute of Chemical Technology and Engineering Faculty of Chemical Technology Poznan University of Technology Poznan60965 Poland Institute of Chemistry and Technical Electrochemistry Poznan University of Technology Poznan 60965 Poland Institute of Materials Science TU Bergakademie Freiberg Freiberg 09599 Germany Max Planck Institute for Chemical Physics of Solids Dresden 01187 Germany Institute of Experimental Physics TU Bergakademie Freiberg Freiberg 09599 Germany European X-Ray Free-Electron Laser Facility (XFEL) GmbH Schenefeld 22869 Germany Institute of Semiconductors and Microsystems Polymere Mikrosysteme TU Dresden Dresden 01062 Germany Saint-Petersburg National Research University of Information Technologies Mechanics and Optics ITMO University St. Petersburg197101 Russia Institute of Ceramic Glass and Constructions Materials TU Bergakademie Freiberg 09599 Germany Institute of Electronics and Sensor Materials TU. Be.rga.kad. emeFreberg Freib. erg 09599 Germany Department of Biochemistry Duke University MedicaI School Durham North Carolina 27708 USA

Composites containing biological materials with nanostructured architecture have become of great interest in modem materials science, yielding both interesting chemical properties and inspiration for biomimetic research. Herein, we describe the preparation of a novel three-dimensional （3D） nanostructured MnO2-based com- posite developed using a carbonized proteinaceous spongin template by an extreme biomimetics approach. The thermal stability of the spongin-based scaffold fadlitated the formation of both carbonized material （at 650 ℃ with exclusion of oxygen） and manganese oxide with a defined nanoscale structure under 150 ℃. Remarkably, the unique network of spongin fibers was maintained after pyrolysis and hydro^ermal processing, yielding a novel porous support. The MnO2-spongin composite shows a bimodal pore distribution, with macropores originating from the spongin network and mesopores from the nanostructured oxidic coating. Interestingl3~ the composites also showed improved electrochemical properties compared to those of Mno2. Voltammetry cycling demonstrated the good stability of the material over more than 3,000 charging/discharging cydes. Additionally, electrochemical impedance spectroscopy revealed lower charge transfer resistance in the prepared materials. We demonstrate the potential of extreme biomimetics for developing a new generation of nanostructred materials with 3D centimeter-scale architecture for the storage and conversion of energy generated from renewable natural sources.

关键词： nanostructuredcomposite extreme biomimetics spongin scaffold manganese oxide electrochemistry supercapacitor

Product selectivity controlled by manganese oxide crystals in catalytic ammoxidation

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Chinese Journal of Catalysis 2021年第12期42卷 2164-2172页

作者： Hai Wang Qingsong Luo Liang Wang Yu Hui Yucai Qin Lijuan Song Feng-Shou Xiao Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310028ZhejiangChina Liaoning Key Laboratory of Petrochemical Catalytic Science and Technology Liaoning Shihua UniversityFushun 113001LiaoningChina Key Laboratory of Applied Chemistry of Zhejiang Province and Department of Chemistry Zhejiang UniversityHangzhou 310028ZhejiangChina Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina

The performances of heterogeneous catalysts can be effectively tuned by changing the catalyst *** we report a controllable nitrile synthesis from alcohol ammoxidation,where the nitrile hydration side reaction could be efficiently prevented by changing the manganese oxide catalysts.α-Mn_(2)O_(3)based catalysts are highly selective for nitrile synthesis,but MnO_(2)-based catalysts includingα,β,γ,andδphases favour the amide production from tandem ammoxidation and hydration *** structural,kinetic,and spectroscopic investigations reveal that water decomposition is hindered onα-Mn2O3,thus to switch off the nitrile *** addition,the selectivity-control feature of manganese oxide catalysts is mainly related to their crystalline nature rather than oxide morphology,although the morphological issue is usually regarded as a crucial factor in many reactions.

关键词： manganese oxide Ammoxidation Nitrile Amide Crystal structure

Rational design of interfacial bonds within dual carbon-protected manganese oxide towards durable aqueous zinc ion battery

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Science China Chemistry 2023年第5期66卷 1406-1416页

作者： Xiuli Guo Chunguang Li Xiyang Wang Zhenhua Li Hui Zeng Pan Hou Minggang Xie Yuxin Li Zhan Shi Shouhua Feng State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China Department of Mechanical and Mechatronics Engineering Waterloo Institute for NanotechnologyMaterials Interface FoundryUniversity of WaterlooWaterlooOntario N2L 3G1Canada

manganese-based cathode materials are promising candidates for aqueous zinc ion batteries(AZIBs)by reason of their low cost and high energy ***,their practical applicability is hampered by the intrinsic defects of poor electrical conductivity,sluggish reaction kinetics,and severe structural ***,we constructed a hierarchically porous structure composed of carbon-encapsulated Mn O nanoparticles(MOC)and three-dimensional(3D)nitrogen-doped graphene aerogel(NGA)(denoted as MOC@NGA).The hybrid was synthesized by a facile in-situ coprecipitation and annealing of manganesebased metal-organic framework(Mn-MOF74)and NGA composite(Mn-MOF74@NGA).Specifically,the carbon shells inherited from organic ligand of Mn-MOF74 could restrain the volume changes of Mn O,and the porous NGA prevented the agglomeration of MOC nanoparticles and enriched the types of interfacial chemical *** from the synergistic effect of rich interface chemical bonds and dual-carbon protection,the MOC@NGA hybrids exhibit fast interfacial electron/charge transfer and transport,and outstanding structural ***,MOC@NGA cathode delivers an excellent rate performance(270 and 99.8 m Ah g^(-1)at 0.1 and 2.0 A g^(-1))and maintains an excellent specific capacity of 151.6 m Ah g^(-1)after 2,000cycles at 1.0 A g^(-1).Moreover,the fabricated MOC@NGA-based quasi-solid-state battery not only achieves outstanding flexibility but also displays impressive cycling stability,demonstrating a promising potential for portable and flexible *** work provides a feasible strategy for the fabrication of the bridging structure of manganese-based oxides and porous carbon matrix for high-specific capacity and durable AZIBs cathodes.

关键词： manganese oxide interfacial chemical bonds carbon modification aqueous zinc ion batteries

Encapsulating manganese oxide nanoparticles within conducting polypyrrole via in situ redox reaction and oxidative polymerization for long-life lithium-ion batteries

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Rare Metals 2021年第9期40卷 2415-2423页

作者： He-Liang Yao Shan-Shan Gao Zheng-Qian Fu Wei-Chao Bao Zhong-Hui Cui Yi-Qiu Li Fang-Fang Xu State Key Laboratory of High Performance Ceramics and Superﬁne Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China

manganese oxides(MnO_(x)) have been extensively investigated due to their extremely high theoretical capacities for application as conversion anodes in lithiumion batteries. However, fully performing their theoretical performance still faces poor electric conductivity and serious volume change upon lithium insertion/***, we demonstrate encapsulating manganese oxide nanoparticles within a conducting polymer polypyrrole(PPy) shell as a facile strategy to overcome such flaws through in situ redox reaction and oxidative polymerization process. Such an in situ method combines the redox reaction between potassium permanganate and tetrahydrofuran to form MnO_(x)nanoparticles and the subsequent oxidative polymerization of pyrrole to form a conductive polypyrrole coating shell by the oxidant KMnO_(4) into one step. For the as-fabricated products(MnO_(x)@PPy), this tenderly introduced conductive PPy shell highly favors the fast electron transfer and preserves the electrode structure integrity upon repeated cycling. As the anode for LIBs, MnO_(x)@PPy exhibits superior lithium storage performance with a high reversible capacity(1538 mAh·g^(-1)), long-life cyclability(747 mAh·g^(-1) after 1000 cycles at 1.0 C) and durable ratability(574 mAh·g^(-1) at 2.0 C). This work demonstrates that the convenient in situ strategy to form conductive polymer coating shell is effective to improve the performance of conversion anodes and can be extended to other materials for energy storage applications.

关键词： manganese oxide Polypyrrole High cycling performance Lithium-ion battery

Preparation and Electrochemical Characteristics of Three-dimensional manganese oxide Micro-supercapacitor Electrode

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Chinese Journal of Chemical Physics 2012年第2期25卷 209-213,I0004页

作者： Chun-ming Wen Zhi-yu Wen Zheng You Xiao-feng Wang Key Laboratory of Fundamental Science on Micro/Nano-Device and System Technology Chongqing UniversityChongqing 400030China Microsystem Research Center Chongqing UniversityChongqing 400030China Department of Precision Instruments and Mechanics Tsinghua UniversityBeijing 100084China

In order to increase the electrode surface area and enhance the charge storage capacity, we study the micro electro mechanical system technology to fabricate three-dimensional high aspect ratio micro-electrode structure based on glass. The anodic constant potential method is employed to deposit manganese oxide as electroactive substances on the micro-electrode surface. Cyclic voltammetry and constant current charge-discharge method are both used to prepare electrode electrochemical performance testing, with a two-dimensional electrode without structure for comparison. Experimental results show that three-dimensional elec- trode structure can effectively enhance the charge storage capacity. At 1.0 mA/cm2 charge- discharge density, the three-dimensional electrode shows a capacitance of 17.88 mF/cm2, seven times higher than the two-dimensional electrode.

关键词： Micro-supercapacitor Micro electro mechanical system Three-dimensional electrode manganese oxide

Temperature-controlled fabrication of hydrophilic manganese oxide microspheres as high-performance electrode materials for supercapacitors

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Chinese Chemical Letters 2023年第5期34卷 516-520页

作者： Yuchen Wang Yaoyu Liu Ahsan Ejaz Kai Yan Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou 510275China Department of Civil Engineering Mirpur University of Science and TechnologyAJKMirpur 10250Pakistan

The supercapacitive properties of manganese oxides(MnO_(x))are strongly affected by their crystal ***,the relationship between the crystal structure and supercapacitive performance of Mn O_(x)is ***,a temperature-controlled fabrication method was developed to achieve MnO_(2),Mn_(3)O_(4),MnO and Mn_(2)O_(3)microspheres with various crystal structure as electrode materials tunable for *** detailed material and electrochemical characterizations revealed the structureactivity relationship of Mn O_(x)microspheres by systematically investigating the effect of valence state,specific surface area,conductivity and morphology on supercapacitive *** these MnO_(x)materials,nanoneedle-like Mn O_(2)delivered a relatively high specific capacitance of 274.1 F/g at 1 A/g due to a high Mn valence state of+4,a large specific surface area of 113.4 m^(2)/g and a desirable electronic conductivity of 1.73×10^(-5)S/***,MnO_(2)presented a remarkable cycle stability with 115%capacitance retention after 10,000 cycles owing to the enhancement of *** work not only provides a facile strategy to modulate MnO_(x)crystal structure,but also offers a deep understanding of structure-dependent supercapacitive performance of MnO_(x).

关键词： Temperature-controlled manganese oxide Microsphere Supercapacitors Hydrophilic

Recent advances in water-splitting electrocatalysts based on manganese oxide

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Carbon Resources Conversion 2019年第3期2卷 242-255页

作者： Vijay SKumbhar Hyeonkwon Lee Jaeyoung Lee Kiyoung Lee School of Nano&Materials Science and Engineering Kyungpook National University2559 Gyeongsang-daeroSangjuGyeongbukSouth Korea Research Institute of Environmental Science&Technology Kyungpook National University80 Daehak-roBuk-guDaeguSouth Korea School of Earth Sciences and Environmental Engineering Ertl Center for Electrochemistry and CatalysisGwangju Institute of Science and Technology(GIST)Gwangju 61005South Korea

The oxygen evolution reaction(OER)of electrochemical water splitting represents a source of hydrogen(H_(2))***-metal-based RuO_(x)and IrO_(x)are expensive and degrade in the presence of electrolyte;thus,the development of low-cost and eco-friendly OER electrocatalysts is *** review summarizes the recent status of the nonprecious manganese metal-oxide-based electrocatalysts with reference to nanostructure,defect engineering,hybrid composite formation,and core-shell formation to achieve efficient OER *** particular,we focus on the strategies used to lower the onset potential and the Tafel slope of the water oxidation *** prospects for the development of manganese-oxide-based electrocatalysts are discussed.

关键词： Hydrogen energy manganese oxide Oxygen evolution reaction Nanostructures,Core-shell