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Plasmon-induced local electric field improved hydrogen evolution reaction on Ag/Mo_(2)C nanosheets

Nano Research 2025年第1期18卷 270-277页

作者： HuangJingWei Li Xin Zi Jun Wu Xinli Wang Li Zhu Qiyou Wang Jianfu Han junwei fu Hongmei Li Kai Huang Yu Chen Min Liu School of Physics State Key Laboratory of Powder MetallurgyHunan Joint International Research Center for Carbon Dioxide Resource UtilizationCentral South UniversityChangsha 410083China School of Metallurgy and Environment Central South UniversityChangsha 410083China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Nano-Institute Munich Faculty of PhysicsLudwig-Maxilimians-Universität MünchenMünchen 80539Germany Hunan Institute of Advanced Sensing and Information Technology Xiangtan UniversityXiangtan 411105China

Electrocatalytic water splitting offers a promising way for hydrogen production with near-zero ***,such as molybdenum carbides(Mo_(2)C),are promising materials for hydrogen evolution reaction(HER)but still suffer from poor intrinsic water activation ***,we developed a plasmon-induced local electric field(PILEF)strategy to solve this ***(Ag)nanoparticles decorated Mo_(2)C nanosheets(Ag/Mo_(2)C)were successfully prepared by electrostatic *** visible light excited the PILEF on Ag/Mo_(2)C remarkably reducing the activation energy by 92.7 kJ·mol^(-1)from 147.3 kJ·mol^(-1)of Mo_(2)C to 54.6 kJ·mol^(-1).As a result,the plasmonic Ag/Mo_(2)C significantly enhances~2.3-fold of the current density from 2.8 mA·cm^(-2)of Mo_(2)C to 6.5 mA·cm^(-2)at-3 V *** and reduces the overpotential by 104 mV from 403 mV of dark state to 299 mV of light state at the current density of 10 mA·cm^(-2),achieving better performance than reported *** research demonstrates that PILEF enhances HER activities,offering a potential strategy for boosting the intrinsic activities of catalysts.

关键词： sliver particles plasmon effect field effect hydrogen evolution reaction(HER) electrocatalysis

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Graphitic carbon nitride/antimonene van der Waals heterostructure with enhanced photocatalytic CO_(2) reduction activity

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Journal of Materials Science & Technology 2022年第21期116卷 192-198页

作者： Jinfeng Zhang junwei fu Kai Dai Key Laboratory of Green and Precise Synthetic Chemistry and Applications Ministry of EducationHuaibei Normal UniversityHuaibei 235000China School of Physics and Electronics Central South UniversityChangsha 410083China

Photocatalytic reduction of CO_(2) into valuable fuels is one of the potential strategies to solve the carbon cycle and energy *** carbon nitride(g-C_(3)N_(4)),as a typical two-dimensional(2D)semiconductor with a bandgap of∼2.7 eV,has attracted wide attention in photocatalytic CO_(2) ***,the performance of g-C_(3)N_(4) is greatly limited by the rapid recombination of photogenerated charge carriers and weak CO_(2) activation *** of van der Waals heterostructure with the maximum interface contact area can improve the transfer/seperation efficiency of interface charge *** metal antimony(Sb)nanosheet(antimonene)with high carrier mobility and 2D layered structure,is a good candidate material to construct 2D/2D Sb/g-C_(3)N_(4) van der Waals *** this work,the density functional theory(DFT)calculations indicated that antimonene has higher carrier mobility than g-C_(3)N_(4) *** charge transfer and in-plane structure distortion will occur at the interface of Sb/g-C_(3)N_(4),which endow stronger CO_(2) activation ability on di-coordinated N active *** ultrathin g-C_(3)N_(4) and antimonene nanosheets were prepared by ultrasonic exfoliation method,and Sb/g-C_(3)N_(4) van der Waals heterostructures were constructed by self-assembly *** photoluminescence(PL)and time-resolved photoluminescence(TRPL)indicated that the Sb/g-C_(3)N_(4) van der Waals heterostructures have a better photogenerated charge separation efficiency than pure g-C_(3)N_(4) ***-situ FTIR spectroscopy demonstrated a stronger ability of CO_(2) activation to^ (∗)COOH on Sb/g-C_(3)N_(4) van der Waals *** a result,the Sb/g-C_(3)N_(4) van der Waals heterostructures showed a higher CO yield with 2.03 umol g^(−1) h^(−1),which is 3.2 times that of pure g-C_(3)N_(4).This work provides a reference for activating CO_(2) and promoting CO_(2) reduction by van der Waals heterostructure.

关键词： Photocatalysis Carbon nitride Antimonene Van der Waals heterostructure CO_(2)activation

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Editorial:special topic on heterojunction in photocatalysts

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Science China Materials 2024年第2期67卷 379-381页

作者： Jiaguo Yu Xin Li junwei fu Kai Dai Laboratory of Solar fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430078China Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642China Hunan Joint International Research Center for Carbon Dioxide Resource Utilization State Key Laboratory of Powder MetallurgySchool of PhysicsCentral South UniversityChangsha 410083China Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation College of Physics and Electronic InformationHuaibei Normal UniversityHuaibei 235000China

To suppress the recombination of photogenerated electron and hole in single photocatalysts,an important method is to design heterojunction by combining two *** method has widely used to enhance the photocatalytic performance of the *** the begining,most people use type-Ⅱcharge carrier transfer mechanism to explain the emhanced activity of the composite semiconductors.

关键词： composite heterojunction method

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Hydrogen bonding in hydrogenated amorphous silicon thin films prepared at different precursor gas temperatures with undiluted silane

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Science China(Technological Sciences) 2011年第9期54卷 2310-2314页

作者： WU MaoYang LI Wei QIU YiJiao fu junwei JIANG YaDong School of Optoelectronic Information University of Electronic Science and Technology of China Chengdu 610054 China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China

Hydrogen bonding configurations and hydrogen content in hydrogenated amorphous silicon (a-Si:H) thin films prepared at different precursor gas temperatures with undiluted silane have been investigated by means of Fourier transform infrared (FTIR) *** results show that the gas temperature before precursor gases entering the glow-discharge zone re-markably influences the hydrogen bonding configurations and the hydrogen content in a-Si:H thin *** hydrogen content decreases from 18% down to 11% when increasing the gas temperature from room temperature (RT) to 433 ***,the clustered hydrogen at the physical film surface or at the internal surfaces of the microvoids decreases,indicating that a-Si:H thin films are densified at higher precursor gas *** a-Si:H thin films deposited at gas temperature of 433 K,the isolated silicon-hydrogen bonding configuration is predominant in the testing films.

关键词： a-Si:H thin film gas temperature hydrogen bonding FTIR PECVD

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Tandem catalysis on adjacent active motifs of copper grain boundary for efficient CO_(2) electroreduction toward C2 products

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Journal of Energy Chemistry 2022年第7期31卷 219-223,I0006页

作者： Tao Luo Kang Liu junwei fu Shanyong Chen Hongmei Li Junhua Hu Min Liu Hunan Joint International Research Center for Carbon Dioxide Resource Utilization State Key Laboratory of Powder MetallurgySchool of Physics and ElectronicsCentral South UniversityChangsha 410083HunanChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002HenanChina

Copper (Cu) is a special electrocatalyst for CO_(2) reduction reaction (CO_(2)RR) to multi-carbon *** introducing grain boundaries (GBs) into Cu-based catalysts is an efficient strategy to improve the selectivity of C^(2+) ***,it is still elusive for the C^(2+) product generation on Cu GBs due to the complex active *** this work,we found that the tandem catalysis pathway on adjacent active motifs of Cu GB is responsible for the enhanced activity for C^(2+)production by first principles *** electronic structure analysis shows,the d-band center of GB site is close to the Fermi level than Cu(100) facet,the Cu atomic sites at grain boundary have shorter bond length and stronger bonding with*CO,which can enhance the adsorption of*CO at GB ***,CO_(2)protonation is more favorable on the region Ⅲ motif (0.84 e V) than at Cu(100) site (1.35 e V).Meanwhile,the region Ⅱ motif also facilitate the C–C coupling (0.72 e V) compared to the Cu(100) motif (1.09 e V).Therefore,the region Ⅲ and Ⅱ motifs form a tandem catalysis pathway,which promotes the C^(2+)selectivity on Cu *** work provides new insights into CO_(2)RR process.

关键词： Cu(100)facet Grain boundary CO_(2)electroreduction C2+products Tandem catalysis

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Strategies that regulate LSD1 for novel therapeutics

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Acta Pharmaceutica Sinica B 2024年第4期14卷 1494-1507页

作者： Meng Li Mengge Dai Bing Cheng Shaotong Li Enhui Guo junwei fu Ting Ma Bin Yu School of Pharmaceutical Sciences&Key Laboratory of Advanced Drug Preparation Technologies Ministry of EducationZhengzhou UniversityZhengzhou 450001China College of Chemistry Zhengzhou UniversityZhengzhou 450001China Tianjian Laboratory of Advanced Biomedical Sciences Institute of Advanced Biomedical SciencesZhengzhou UniversityZhengzhou 450000China Pingyuan Laboratory State Key Laboratory of Antiviral DrugsHenan Normal UniversityXinxiang 453007China State Key Laboratory of Pharmaceutical Biotechnology Nanjing UniversityNanjing 210023China

Histone methylation plays crucial roles in regulating chromatin structure and gene transcrip-tion in epigenetic ***-specific demethylase 1(LSD1),the first identified histone de-methylase,is universally overexpressed in various ***1 dysregulation is closely associated with cancer,viral infections,and neurodegenerative diseases,etc.,making it a promising therapeutic *** LSD1 inhibitors and two small-molecule degraders(UM171 and BEA-17)have entered the clinical ***1 can remove methyl groups from histone 3 at lysine 4 or lysine 9(H3K4 or H3K9),resulting in either transcription repression or *** the roles of LSD1 in transcrip-tional regulation are well-established,studies have revealed that LSDl can also be dynamically regulated by other *** example,the expression or activity of LSD1 can be regulated by many proteins that form transcriptional corepressor complexes with ***,some post-transcriptional modifica-tions and cellular metabolites can also regulate LSD1 expression or its demethylase ***,in this review,we will systematically summarize how proteins involved in the transcriptional corepressor complex,various post-translational modifications,and metabolites act as regulatory factors for LSD1 ac-tivity.

关键词： LSD1 regulation Transcription repression Transcription activation the Corepressor complex Post-transcriptional modifications Metabolites

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Hydroxyl radical induced from hydrogen peroxide by cobalt manganese oxides for ciprofloxacin degradation

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Chinese Chemical Letters 2022年第12期33卷 5208-5212页

作者： Shuandi Wang Xiaodong Zhang Guozhu Chen Bao Liu Hongmei Li Junhua Hu junwei fu Min Liu Hunan Joint International Research Center for Carbon Dioxide Resource Utilization School of Physics and ElectronicsState Key Laboratory of Powder MetallurgyHunan Provincial Key Laboratory of Chemical Power SourcesCentral South UniversityChangsha 410083China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China

Advanced oxidation processes(AOPs)are promising technology to remove organic pollutant in ***,the main problem in the AOPs is the low generation of hydroxyl radical(·OH)owing to the low decomposition efficiency of hydrogen peroxide(H_(2)O_(2)).Herein,the spinel type cobalt acid manganese(MnCo_(2)O_(4))with flower morphology was fabricated through a co-precipitation *** situ Fourier transform infrared spectroscopy confirms that the MnCo_(2)O_(4) with the optimal molar ratio of Co and Mn precursors(CM3,Co:Mn=3)has more Lewis acid sites compared with single metal oxide catalysts(Co_(3)O_(4) and Mn_(2)O_(3)),leading to the excellent performances for H_(2)O_(2) decomposition rate constant on CM3,which is about 15.03 and 4.21 times higher than those of Co_(3)O_(4) and Mn_(2)O_(3),*** a result,the obtained CM3 shows a higher ciprofloxacin degradation ratio than that of Co_(3)O_(4) and Mn_(2)O_(3).furthermore,CM3 shows an excellent stability during several *** work proposes effective catalysts for ciprofloxacin decomposition and provides feasible route for treating practical environmental problems.

关键词： Catalytic decomposition Hydrogen peroxide Advanced oxidation processes Ciprofloxacin Pollutant degradation

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Tuning the electron structure enables the NiZn alloy for CO_(2) electroreduction to formate

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Journal of Energy Chemistry 2021年第12期30卷 625-632,I0015页

作者： Xiaodong Zhang Yajiao Zhou Hang Zhang Huang Jing Wei Li Kang Liu Hongmei Li Hao Pan Junhua Hu junwei fu Shanyong Chen Min Liu School of Physics and Electronics Hunan Provincial Key Laboratory of Chemical Power SourcesState Key Laboratory of Powder MetallurgyCentral South UniversityChangsha 410083HunanChina Department of Periodontics&Oral Mucosal Section Xiangya Stomatological HospitalCentral South UniversityChangsha 410008HunanChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002HenanChina School of Environment Guangdong Key Laboratory of Environmental Pollution and HealthJinan UniversityGuangzhou 511443GuangdongChina

Formate is an important liquid chemical,which can be produced by electrocatalytic carbon dioxide reduction reaction(CO_(2) RR).Most of the metal catalysts for CO_(2) RR to formate are toxic or noble metals,such as Cd,Hg,Pb and Pd,leading to the environmental pollution or increased production ***,we develop an environmentally friendly and low-cost NiZn alloy catalyst for CO_(2) RR to *** X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS) and transmission electron microscopy(TEM) confirm the alloy structure of the prepared NiZn catalyst. As for a catalyst for CO_(2) RR,the NiZn alloy exhibits the FE_(HCOO)^(-)(Faraday efficiency of HCOO^(-)) of 36±0.7% at-0.9 V *** in 0.1 M KHCO_(3), and remarkable stability for 40,000 s at-0.8,-0.9,-1.0 and-1.1 V ***,*** calculation results indicate that the NiZn alloy exhibits the middle valence electron structure between the Zn and Ni metal,resulting in the favorable pathway for HCOOH formation but unfavorable for the hydrogen evolution reaction and CO *** Ultraviolet Photoelectron Spectroscopy results verify the modulated valence electron structure for NiZn alloy as compared to Ni and Zn,consistent with the theoretical calculation *** work provides new insights into design of alloy catalysts for CO_(2) RR to formate.

关键词： Electrocatalysis CO_(2)reduction reaction Formate NiZn alloy Valence electron structure

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Recent advances in the utilization of copper sulfide compounds for electrochemical CO2 reduction

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Nano Materials Science 2020年第3期2卷 235-247页

作者： Yingkang Chen Kejun Chen junwei fu Akira Yamaguchi Hongmei Li Hao Pan Junhua Hu Masahiro Miyauchi Min Liu State Key Laboratory of Powder Metallurgy Shenzhen Research InstituteSchool of Physics and ElectronicsCentral South UniversityPR China Department of Periodontics&Oral Mucosal Section Xiangya Stomatological HospitalCentral South University72 Xiangya RoadChangsha410008HunanPR China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450002PR China Department of Materials Science and Engineering School of Materials and Chemical TechnologyTokyo Institute of Technology2-12-1 OokayamaMeguro-kuTokyo152-8552Japan

Converting carbon dioxide(CO2)into value-added chemicals by CO2 reduction has been considered as a potential way to solve the current energy crisis and environmental *** the methods of CO2 reduction,the electrochemical method has been widely used due to its mild reaction condition and high reaction *** the electrochemical reduction system,the CO2 electrocatalyst is the most important *** many CO2 electrocatalysts have been developed,efficient catalysts with high activity,selectivity and stability are still *** sulfide compound,as a low-toxicity and emerging material,has broad prospects in the field of CO2 reduction due to its unique structural and electrochemical *** progress has been achieved with copper sulfide nanocrystalline and the field is rapidly *** paper summarizes the preparation,recent progress in development,and factors affecting the electrocatalytic CO2 reduction performance with copper sulfide compound as a *** for future development are also outlined,with the aim of using copper sulfide compound as a highly active and stable electrocatalyst for CO2 reduction.

关键词： CO2 reduction Copper sulfide compound Electrocatalyst Product selectivity

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Regulating local charges of atomically dispersed Moδ+ sites by nitrogen coordination on cobalt nanosheets to trigger water dissociation for boosted hydrogen evolution in alkaline media

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Journal of Energy Chemistry 2022年第9期31卷 125-132,I0004页

作者： Maoqi Cao Kang Liu Yao Song Chao Ma Yiyang Lin Huangjingwei Li Kejun Chen junwei fu Hongmei Li Jun Luo Yida Zhang Xusheng Zheng Junhua Hu Min Liu School of Chemistry and Chemical Engineering Qiannan Normal University for NationalitiesDuyun 558000GuizhouChina State Key Laboratory of Powder Metallurgy School of Physics and ElectronicsShenzhen Research InstituteSchool of Physical and ElectronicsCentral South UniversityChangsha 410083HunanChina School of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha 410004HunanChina School of Materials Science and Engineering Hunan UniversityChangsha 410082HunanChina National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029AnhuiChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina

Now,Pt-based materials are still the best catalysts for hydrogen evolution reaction(HER).Nevertheless,the scarcity of Pt makes it impossible for the large-scale applications in *** cobalt is taken as an excellent HER catalyst due to its suitable H*binding,its alkali HER catalytic property need to be improved because of the sluggish water dissociation *** this work,nitrogen with small atomic radius and metallophilicity is employed to adjust local charges of atomically dispersed Mo^(δ+)sites on Co nanosheets to trigger water *** calculations suggest that the energy barrier of water dissociation can be effectively reduced by introducing nitrogen coordinated Mo^(δ+)*** realize this speculation,atomically dispersed Mo^(δ+)sites with nitrogen coordination of Mo(N)/Co were prepared via reconstruction of CoMoO_(4).High angle annular dark-field scanning transmission electron microscopy(HAADF-STEM)and X-ray absorption spectroscopy(XAS)demonstrate the coordination of N atoms with atomically dispersed Mo atoms,leading to the local charges of atomically dispersed Mo^(δ+)sites in Mo(N)/*** measurement from ambient pressure X-ray photoelectron spectroscopy(AP-XPS)reveals that the Mo^(δ+)sites promote the adsorption and activation of water ***,the Mo(N)/Co exhibits an excellent activity,which need only an overpotential of 39 mV to reach the current density of 10 mA cm^(-2).The proposed strategy provides an advance pathway to design and boost alkaline HER activity at the atomic-level.

关键词： Charge localized Mo Nitrogen coordination Co nanosheet Water dissociation Alkaline HER

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