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Journal of Energy Chemistry 2023年第1期76卷 448-458,I0011页

作者： Jianuo Chen Zunmin Guo Maria Perez-Page Yifeng Jia Ziyu Zhao Stuart M.Holmes Department of Chemical Engineering and Analytical Science University of ManchesterOxford RoadManchester M139PLUnited Kingdom Chemistry Research Laboratory Department of ChemistryUniversity of Oxford12 Mansfield RoadOxford OX13TAUnited Kingdom

The doping of functionalized graphene oxide(GO)in the membranes becomes a promising method for improving the performance of high-temperature proton exchange membrane fuel cells(HT-PEMFC).Phosphonated graphene oxide(PGO)with a P/O ratio of 8.5%was quickly synthesised by one-step electrochemical exfoliation based on a three-dimensiaonal(3D)printed reactor and natural graphite *** with the GO prepared by the two-step electrochemical exfoliation method,the PGO synthesized by the one-step electrochemical exfoliation can better improve the performance of the membrane-electrode-assembly(MEA)based on the polybenzimidazole(PBI)membrane in the *** doping of 1.5 wt%GO synthesised by electrochemical exfoliation with the 2-step method or reactor method in PBI increased the peak power density by 17.4%or 35.4%compared to MEA based on pure PBI membrane at 150℃,*** addition,the doping of PGO in PBI improves its durability under accelerated stress test(AST).

关键词： electrochemical exfoliation Phosphonated graphene oxide High-temperature fuel cells

electrochemical exfoliation of two-dimensional layered black phosphorus and applications

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Journal of Energy Chemistry 2020年第10期29卷 365-374页

作者： Le Li Dan Zhang Jianping Deng Yuchun Gou Junfei Fang Shaanxi Key Laboratory of Industrial Automation School of Mechanical EngineeringShaanxi University of TechnologyHanzhong 723001ShaanxiChina Shaanxi Province Key Laboratory of Catalytic Foundation and Application School of Chemistry and Environment ScienceShaanxi University of TechnologyHanzhong 723001ShaanxiChina

With the discovery of graphene,black phosphorus(BP)has been rediscovered as a two-dimensional(2 D)layered *** its first preparation in 2014,2 D BP has elicited immense interest,and has exhibited excellent properties,such as distinct pleated structures in layers,adjustable direct bandgap,high carrier mobility,moderate on/off ratio,large specific surface area,and various interesting in-layer ***,the realization of these excellent properties depends on the preparation of highquality 2 D BP *** exfoliation methods are typically performed under mild conditions,thus,these methods are convenient,controllable,and can produce high-quality 2 D BP *** review summarizes research progress in BP sheets preparation through anodic,cathodic,and electrolyte exfoliation in recent *** exfoliating methods affect the quality of 2 D BP ***,possible exfoliating mechanisms and the potential applications of different exfoliating methods are summarized and discussed in ***,the shortcomings of existing research on electrochemical exfoliation are presented,and suggestions and prospects for future research on the electrochemical exfoliation of 2 D BP are proposed.

关键词： Black phosphorus electrochemical exfoliation 2D BP sheets Anode exfoliation Cathodic exfoliation

Synthesis of graphene materials by electrochemical exfoliation: Recent progress and future potential

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Carbon Energy 2019年第2期1卷 173-199页

作者： Fei Liu Chaojun Wang Xiao Sui Muhammad Adil Riaz Meiying Xu Li Wei Yuan Chen School of Chemical and Biomolecular Engineering The University of SydneySydneyNew South WalesAustralia Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application State Key Laboratory of Applied Microbiology Southern ChinaGuangdong Institute of MicrobiologyGuangdong Academy of SciencesGuangzhouChina

Synthesis of structurally controlled graphene materials is critical for realizing their practical *** electrochemical exfoliation of graphite has emerged as a simple method to produce graphene *** review examines research progress in the last 5 years,from 2015 to *** material synthesis methods generally have a trade‐off between increasing production yield and achieving better material property *** synthesis conditions for synthesizing pristine graphene,graphene oxide(GO),and graphene composites are significantly ***,in this review,we first discuss synthesis methods for graphene materials with high C/O ratios from four aspects:graphite electrodes,equipment engineering,electrolytes,and additional reduction ***,we survey synthesis methods for GO and examine how the pretreatment of the graphite electrodes,electrolytes,and operation parameters,such as applied voltages,electrolyte temperatures,and mechanical forces,affect the quality of ***,we summarize electrochemical exfoliation methods used to dope graphene materials,introduce covalent functional groups,incorporate various nanoparticles,and assembly of graphene *** all synthesis methods,we compare the properties of resulting graphene materials such as C/O ratios,lateral size,layer numbers,and quality characterized by Raman ***,we propose our perspectives on further *** hope this review stimulates more studies to realize the on‐demand production of graphene materials with desired properties using electrochemical exfoliation methods.

关键词： electrochemical exfoliation graphene graphene oxide graphite synthesis

Synthesis,characterization and life cycle assessment of electrochemically exfoliated KOH-activated holey graphene

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Frontiers of Environmental Science & Engineering 2023年第12期17卷 175-188页

作者： Fatemeh Mozaffarpour Nafiseh Hassanzadeh Ehsan Vahidi Faculty of Materials Science and Engineering K.N.Toosi University of TechnologyTehran ***Iran Department of Mining and Metallurgical Engineering Mackay School of Earth Sciences and EngineeringUniversity of NevadaRenoNV 89557USA

Graphene materials have drawn tremendous attention in recent *** formation of holes and pores on graphene sheets can provide transfer channels and facilitate the ion/electron transport *** this study,graphene nanosheets were prepared electrochemically,and then,they were used as the starting material for the preparation of holey graphene(HG)through the KOH activation *** weight ratio of initial electrochemically exfoliated graphene(EEG)to KOH was optimized according to the morphological features,BET surface area examination,graphene number of layers calculated from XRD patterns,and the ID/IG ratio obtained from Raman *** showed that increasing the KOH amount led to the achievement of higher values of ID/IG and surface area and less re-stacking of graphene sheets which occurs because of the heat treatment *** environmental burdens of the production routes for the preparation of EEG and HG were investigated by cradle-to-gate life cycle assessment(LCA).The LCA results of EEG production indicated that electricity with the contributions of 94%,91%,82%,and 75%of the total impact in four environmental categories,including fossil fuel depletion,ozone depletion,global warming,and smog was the main environmental *** the pore generation process,KOH was recognized as the biggest contributor(about 51%to 83%of the total impact)in six impact categories,including ozone depletion,non-carcinogenics,smog,global warming,carcinogenics,and eutrophication which could be attributed to its high consumption amount(21.9 kg).This work offers environmental considerations for the development of sustainable graphene materials.

关键词： Holey graphene electrochemical exfoliation Life cycle assessment(LCA) Environmental impact KOH activation

Unlocking the charge doping effect in softly intercalated ultrathin ferromagnetic superlattice

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eScience 2023年第3期3卷 105-114页

作者： Liang Hu Bingzhang Yang Zhipeng Hou Yangfan Lu Weitao Su Lingwei Li Key Laboratory of Novel Materials for Sensor of Zhejiang Province College of Materials and Environmental EngineeringHangzhou Dianzi UniversityHangzhou310018PR China State Key Lab of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou310027PR China South China Academy of Advanced Optoelectronics South China Normal UniversityGuangzhou510006PR China

The electrolyte-assisted exfoliation strategy is widely employed to synthesize ultrathin two-dimensional(2D)***,spins in 2D magnets are susceptible to the electrolyte due to the underlying charge doping ***,it is crucial to understand and trace the doping process during the delamination of 2D *** the prototype Fe_(3)GeTe_(2),we utilized soft organic cations to exfoliate the bulk and obtain a freestanding organ-ic–inorganic hybrid superlattice with a giant electron doping effect as high as 6.9×10^(14)/cm^(2)(~1.15 electrons per formula unit).A remarkable ferromagnetic transition exceeding 385 K was revealed in these superlattices,together with unique anisotropic saturation *** doping enhanced the in-plane electron–phonon coupling and thus optimized originally poor indirect double-exchange scenario for spin *** emerging vertical magnetization shift phenomenon served to evaluate the uniformity of charge *** above findings provide a new perspective for understanding the role of parasitic charge in 2D magnetism.

关键词： Van der waals magnet electrochemical exfoliation Hybrid superlattice Electron doping Exchange bias Spintronics

electrochemically exfoliated Ni-doped MoS_(2) nanosheets for highly efficient hydrogen evolution and Zn-H_(2)O battery

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Chinese Chemical Letters 2023年第1期34卷 159-163页

作者： Hao Wei Jincheng Si Libin Zeng Siliu Lyu Zhiguo Zhang Yange Suo Yang Hou School of Mechanical and Energy Engineering Zhejiang University of Science and TechnologyHangzhou 310027China Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of Zhejiang University-Quzhou Quzhou 324000China School of Metallurgy and Chemical Engineering Jiangxi University of Science and TechnologyGanzhou 341000China

Thanks to tunable physical and chemical properties,two-dimensional(2D)materials have received intensive interest,endowing their excellent electrocatalytic performances for applications in energy ***,their catalytic activities are largely determined by poor adsorption energy and limited active edge ***,a one-step electrochemical exfoliation strategy was developed to fabricate 2D Ni-doped MoS_(2)nanosheets(Ni-EX-MoS_(2))with a lateral size of500 nm and thickness of3.5 *** from high electrical conductivity and abundant exposing active sites,Ni-EX-MoS_(2)catalyst displayed an admirable performance for electrochemical hydrogen evolution reaction(HER)with a low overpotential of 145 m V at 10 m A/cm^(2)as well as a small Tafel slope of 89 m V/dec in alkaline media,which are superior to those of the most reported MoS_(2)-based *** formed Ni species with tuning electronic structure played a crucial role as primary active center of Ni-EX-MoS_(2),as well as the forming stable 1T/2H phase MoS_(2)interface demonstrated a synergistic effect on electrocatalytic HER ***,Ni-EX-MoS_(2)was employed as a cathode electrode for alkaline Zn-H_(2)O battery,which displayed a high power density of 3.3 m W/cm^(2)with excellent *** work will provide a simple and effective guideline for design of electrochemically exfoliated transition metal-doped MoS_(2)nanosheets to inspire their practical applications in energy catalytic and storage.

关键词： electrochemical exfoliation Ni doping MoS_(2) Hydrogen evolution reaction Zn-H_(2)O battery