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Pd single atoms cooperate with S vacancies in ZnIn_(2)S_(4) nanosheets for photocatalytic pure-water splitting

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Science China Chemistry 2024年第3期67卷 855-861页

作者： Lin Sun Huiping Peng Fei Xue Shangheng Liu Zhiwei Hu hongbo geng Xiaozhi Liu Dong Su Yong Xu Xiaoqing Huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices Collaborative Innovation Center of Advanced Energy MaterialsSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China Max Planck Institute for Chemical Physics of Solids Nothnitzer Strasse 40Dresden 01187Germany School of Materials Engineering Changshu Institute of TechnologyChangshu 215500China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of SciencesBeijing 100190China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China

Photocatalytic water splitting has emerged as a new frontier for converting solar energy to green H_(2) and value-added ***,great challenges still remain for developing efficient photocatalysts for pure water splitting without sacrificial *** this work,we demonstrate that doping hexagonal ZnIn_(2)S_(4)(ZIS) with Pd single atoms(Pd_(0.03)/ZIS) can serve as a highly efficient photocatalyst for pure water splitting to simultaneously produce H_(2) and H_(2)O_(2) without any sacrificial *** from aberration-corrected high-angle annular dark field scanning transmission electron microscopy,X-ray fine spectroscopy,insitu electron paramagnetic resonance and diffuse Fourier transform infrared spectroscopy reveal that doping ZIS with Pd single atoms facilitates the formation of S vacancies(S_(v)),where the photogenerated electrons can transfer to Pd single atoms,as a result of enhanced separation of electron-hole pairs and improved photocatalytic ***,Pd_(0.03)/ZIS displays a stoichiometric ratio of H_(2) and H_(2)O_(2) with the productivity of 1,037.9 and 1,021.4μmol g^(-1)h^(-1),respectively,which has largely outperformed pure ZIS and other reported catalysts for pure water *** work provides an efficient photocatalyst for water splitting to produce H_(2) and H_(2)O_(2),which may attract rapid interest in materials science,chemistry,and heterogeneous catalysis.

关键词： ZnIn_(2)S_(4) Pd single atom S vacancy pure water splitting H_(2)O_(2)

Modulate the electronic structure of Cu_(7)S_(4)nanosheet on TiO_(2)for enhanced photocatalytic hydrogen evolution

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Nano Research 2023年第4期16卷 4488-4493页

作者： Wenqiang Liu Huiping Peng Leigang Li Mingmin Wang hongbo geng Xiaoqing Huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China School of Materials Engineering Changshu Institute of TechnologyChangshu 215500China

TiO_(2)is a promising photocatalyst due to its high thermodynamic stability and ***,its applications have been still limited because of the high recombination rate of electron-hole ***,we show that by combining heterojunction construction and electronic structure regulation,the electron-hole pairs in TiO_(2)can be effectively separated for enhanced photocatalytic hydrogen *** optimized Cu_(7)S_(4)nanosheet decorated TiO_(2)achieves much enhanced H_(2)evolution rate(11.5 mmol·g−1·h−1),which is 13.8 and 4.2 times of that of TiO_(2)and Cu_(7)S_(4)/TiO_(2),*** results of photoluminescence spectroscopy,transient photocurrent spectra,ultraviolet-visible diffuse reflectance spectra,and electrochemical impedance spectroscopy collectively demonstrate that the enhanced photocatalytic performance of Air-Cu_(7)S_(4)/TiO_(2)is attributed to the effective separation of charge carriers and widened photoresponse *** electron paramagnetic resonance and X-ray photoelectron spectroscopy results indicate that the increase of Cu2+in the Cu_(7)S_(4)nanosheet after calcination can promote the charge *** work provides an effective method to improve the electron migration rate and charge separation of TiO_(2),which holds great significance for being extended to other material systems and beyond.

关键词： Cu_(7)S_(4)nanosheet Cu^(2+) electronic structure regulation heterojunction photocactalytic hydrogen evolution

SbPS_(4):A novel anode for high-performance sodium-ion batteries

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Chinese Chemical Letters 2022年第1期33卷 470-474页

作者： Miao Yang Zhonghui Sun Ping Nie Haiyue Yu Chende Zhao Mengxuan Yu Zhongzhen Luo hongbo geng Xinglong Wu School of Materials Engineering Changshu Institute of TechnologyChangshu 215500China Faculty of Chemistry Northeast Normal UniversityChangchun 130024China Center for Advanced Analytical Science School of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou 510006China Key Laboratory of Preparation and Application of Environmental Friendly Materials(Jilin Normal University) Ministry of EducationChangchun 130103China Key Laboratory of Eco-materials Advanced Technology College of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityMinistry of EducationChangchun 130024China

With the in-depth research of sodium-ion batteries(SIBs),the development of novel sodium-ion anode material has become a top *** this work,tube cluster-shaped SbPS_(4)was synthesized by a high-temperature solid phase *** the typical short tubular ternary thiophosphate SbPS_(4)compounded with graphene oxide(SbPS_(4)/GO)was successfully synthesized after ultrasonication and ***_(4)shows a high theoretical specific capacity(1335 mAh/g)according to the conversion-alloying dual *** unique short tube inserted in the spongy graphene structure of SbPS_(4)/GO results in boosting the Na ions transport and alleviating the huge volume change in the charging and discharging processes,improving the sodium storage ***,the tubular SbPS_(4)compounded with 10%GO provides an outstanding capacity of 359.58 mAh/g at 500 mA/*** result indicates that SbPS_(4)/GO anode has a promising application potential for SIBs.

关键词： Sodium-ion batteries High-capacity anode Thiophosphate SbPS_(4)/GO Full cell

Suppressing oxygen redox in layered oxide cathode of sodium-ion batteries with ribbon superstructure and solid-solution behavior

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Journal of Materials Science & Technology 2023年第29期160卷 9-17页

作者： Zhi-Xiong Huang Xue-Li Zhang Xin-Xin Zhao Hong-Yan Lü Xin-Yi Zhang Yong-Li Heng hongbo geng Xing-Long Wu MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchunJilin 130024China School of Materials Engineering Changshu Institute of TechnologyChangshuJiangsu 215500China Faculty of Chemistry Northeast Normal UniversityChangchunJilin 130024China

Sodium-ion batteries(SIBs)are proved as one of the most acceptable candidates for replacing lithium-ion batteries in some fields by virtue of a similar“rocking chair”mechanism and the abundance of *** voltage,rate performance,and energy density of these batteries are mainly determined by the ***,a Li-Ni-Co co-substituted P2-Na_(0.67)[Li_(0.1)(Mn_(0.7)Ni_(0.2)Co_(0.1))_(0.9)]O_(2)(NLMNC)with ribbon super-structure is prepared with the aim of multi-ion synergistic *** to the addition of Ni and Co,the Jahn-Teller distortion of Mn can be suppressed corresponding with the improved structural stability,and a little bit of oxygen redox activities is *** with the substitution of 10%Li,the X-ray diffraction(XRD)peaks of NLMNC show the ribbon superstructure at about 21°and 22°.The smooth charge/discharge profiles of the NLMNC cathode exhibit the solid-solution *** addition,the platform at high voltage disappears corresponding with the existing oxygen redox activities being suppressed which may be related to the ribbon superstructure and the promotion of the Ni *** NLMNC cathode can deliver a reversible discharge capacity of 123.5 mA h g^(-1)at 10 mA g^(-1).Even if the current density increases to 500 mA g^(-1),a reversible discharge capacity of 112.8 mA h g^(-1)still can be *** distinguished cycling stability is related to the reversible migration of Li+between the metal oxide layer and the interlayer and low volume change during *** is also needing to be mentioned that the capacity retention of NLMNC cathode is about 94.4%(based on the highest discharge capacity)after 100 *** work presents an effective route to develop high-performance cathodes for SIBs.

关键词： Sodium-ion batteries Layered oxides Ribbon superstructure Solid-solution reaction

Vanadium-based metal-organic frameworks and their derivatives for electrochemical energy conversion and storage

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SmartMat 2022年第3期3卷 384-416页

作者： Jing Zhu Xiaoyu Chen Ai Qin Thang Fei‐Long Li Dong Chen hongbo geng Xianhong Rui Qingyu Yan Department of Applied Chemistry State Key Laboratory of Tea Plant Biology and UtilizationAnhui Agricultural UniversityAnhuiChina School of Materials Science and Engineering Nanyang Technological UniversitySingaporeSingapore School of Materials Engineering Changshu Institute of TechnologyChangshuJiangsuChina School of Materials and Energy Guangdong University of TechnologyGuangzhouChina

With the excessive consumption of nonrenewable resources,the exploration of effective and durable materials is highly sought after in the field of sustainable energy conversion and storage *** this aspect,metalorganic frameworks(MOFs)are a new class of crystalline porous organicinorganic hybrid *** have recently been gaining traction in energy-related *** to the coordination flexibility and multiple accessible oxidation states of vanadium ions or clusters,vanadium-MOFs(V-MOFs)possess unique structural characteristics and satisfactory electrochemical ***,V-MOFs-derived materials also exhibit superior electrical conductivity and stability when used as electrocatalysts and electrode *** review summarizes the research progress of V-MOFs(inclusive of pristine V-MOFs,V/M-MOFs,and POVbased MOFs)and their derivatives(vanadium oxides,carbon-coated vanadium oxide,vanadium phosphate,vanadate,and other vanadium doped nanomaterials)in electrochemical energy conversion(water splitting,oxygen reduction reaction)and energy storage(supercapacitor,rechargeable battery).Future possibilities and challenges for V-MOFs and their derivatives in terms of design and synthesis are ***,their applications in energy-related fields are also highlighted.

关键词： derivatives electrocatalysis rechargeable battery supercapacitor V-based metal-organic frameworks

High-strength and thermally stable TiB_(2)-modified Al-Mn-Mg-Er-Zr alloy fabricated via selective laser melting

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International Journal of Minerals,Metallurgy and Materials 2024年第10期31卷 2221-2232页

作者： Jiang Yu Yaoxiang geng Yongkang Chen Xiao Wang Zhijie Zhang Hao Tang Junhua Xu hongbo Ju Dongpeng Wang School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China National Engineering Research Center of Near-Net Shape Forming for Metallic Materials Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic MaterialsSouth China University of TechnologyGuangzhou 510640China CEMMPRE-Centre for Mechanical Engineering Materials and Processes Department of Mechanical EngineeringUniversity of CoimbraRua Luís Reis SantosCoimbra 3030-788Portugal

To increase the processability and plasticity of the selective laser melting(SLM)fabricated Al-Mn-Mg-Er-Zr alloys,a novel TiB_(2)-modified Al-Mn-Mg-Er-Zr alloy with a mixture of Al-Mn-Mg-Er-Zr and nano-TiB_(2) powders was fabricated by *** pro-cessability,microstructure,and mechanical properties of the alloy were systematically investigated by density measurement,microstruc-ture characterization,and mechanical properties *** alloys fabricated at 250 W displayed higher relative densities due to a uni-formly smooth top surface and appropriate laser energy *** maximum relative density value of the alloy reached(99.7±0.1)%,demonstrating good *** alloy exhibited a duplex grain microstructure consisting of columnar regions primarily and equiaxed regions with TiB_(2),Al6Mn,and Al3Er phases distributed along the grain *** directly aging treatment at a high tem-perature of 400℃,the strength of the SLM-fabricated TiB_(2)/Al-Mn-Mg-Er-Zr alloy increased due to the precipitation of the secondary Al6Mn *** maximum yield strength and ultimate tensile strength of the aging alloy were measured to be(374±1)and(512±13)MPa,*** SLM-fabricated TiB_(2)/Al-Mn-Mg-Er-Zr alloy demonstrates exceptional strength and thermal stability due to the synergistic effects of the inhibition of grain growth,the incorporation of TiB_(2) nanoparticles,and the precipitation of secondary Al6Mn nanoparticles.

关键词： selective laser melting aluminum alloy processability mechanical properties thermal stability

Metal–Oleate Complex?Derived Bimetallic Oxides Nanoparticles Encapsulated in 3D Graphene Networks as Anodes for Efficient Lithium Storage with Pseudocapacitance

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Nano-Micro Letters 2019年第1期11卷 250-263页

作者： Yingying Cao Kaiming geng hongbo geng Huixiang Ang Jie Pei Yayuan Liu Xueqin Cao Junwei Zheng Hongwei Gu Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science and Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow University School of Chemical Engineering and Light Industry Guangdong University of Technology School of Chemical and Biomedical Engineering Nanyang Technological University College of Physics Optoelectronic and Energy Soochow University

In this manuscript, we have demonstrated the delicate design and synthesis of bimetallic oxides nanoparticles derived from metal–oleate complex embedded in 3D graphene networks(MnO/CoMn_2O_4  GN), as an anode material for lithium ion batteries. The novel synthesis of the MnO/CoMn_2O_4  GN consists of thermal decomposition of metal–oleate complex containing cobalt and manganese metals and oleate ligand, forming bimetallic oxides nanoparticles, followed by a selfassembly route with reduced graphene oxides. The MnO/CoMn_2O_4  GN composite, with a unique architecture of bimetallic oxides nanoparticles encapsulated in 3D graphene networks, rationally integrates several benefits including shortening the di usion path of Li^+ ions, improving electrical conductivity and mitigating volume variation during cycling. Studies show that the electrochemical reaction processes of MnO/Co Mn_2O_4  GN electrodes are dominated by the pseudocapacitive behavior, leading to fast Li^+ charge/discharge reactions. As a result, the MnO/CoMn_2O_4  GN manifests high initial specific capacity, stable cycling performance, and excellent rate capability.

关键词： Metal–oleate complex Bimetallic oxides nanoparticles Porous architecture 3D graphene networks Lithium ion batteries

Co/N-C nanotubes with increased coupling sites by space-confined pyrolysis for high electrocatalytic activity

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Green Energy & Environment 2017年第1期2卷 23-29页

作者： Jun Yang Laiquan Li Hong Yu hongbo geng Chengchao Li Xiaochen Dong Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University (NanjingTech) School of Chemical Engineering and Light Industry Guangdong University of Technology

Searching low cost and non-precious metal catalysts for high-performance oxygen reduction reaction is highly desired. Herein, Co nanoparticles embedded in nitrogen-doped carbon(Co/N—C) nanotubes with internal void space are successfully synthesized by space-confined pyrolysis, which effectively improve the cobalt loading content and restrict the encapsulated particles down to nanometer. Different from the typical conformal carbon encapsulation, the resulting Co/N—C nanotubes possess more cobalt nanoparticles embedded in the nanotubes, which can provide more coupling sites and active sites in the oxygen reduction reaction(ORR). Moreover, the one-dimensional and porous structure provides a high surface area and a fast electron transfer pathway for the ORR. And the Co/N—C electrode presents excellent electrocatalytic ORR activity in terms of low onset potential(30 mV lower than that of Pt/C), small Tafel slop(45.5 mV dec^(-1)) and good durability(88.5% retention after 10,000 s).

关键词： Co nanoparticles Nitrogen-doped carbon nanotubes Oxygen reduction reaction

Oxyvanite V3O5:A new intercalation-type anode for lithium-ion battery

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InfoMat 2019年第2期1卷 251-259页

作者： Dong Chen Huiteng Tan Xianhong Rui Qi Zhang Yuezhan Feng hongbo geng Chengchao Li Shaoming Huang Yan Yu Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices Collaborative Innovation Center of Advanced Energy MaterialsSchool of Materials and EnergyGuangdong University of TechnologyGuangzhouGuangdongChina Hefei National Laboratory for Physical Sciences at the Microscale Department of Materials Science and EngineeringKey Laboratory of Materials for Energy ConversionChinese Academy of Sciences(CAS)University of Science and Technology of ChinaHefeiAnhuiChina Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhouChina Department of Materials Science and Engineering University of Science and Technology of China Dalian National Laboratory for Clean Energy(DNL)CASDalianLiaoningChina

In the present study,V3O5 microcrystals that synthesized via vacuum calcination are employed as anodes for lithium-ion batteries(LIBs)for the first *** the widely observed sluggish reaction kinetics and poor cycling stability in most microsized transition metal oxides,the V3O5 microcrystals exhibit excellent rate capability(specific capacities of 144 and 125 mAh g^−1 are achieved at extremely high current densities of 20 and 50 A g^−1,respectively)and long-term cycling performance(specific capacity of 117 mAh g^−1 is sustained over 2000 cycles at 50 A g^−1).It is ascribed to the three-dimensional open-framework structure of the V3O5 microcrystals as a major factor in dictating the fast reaction kinetics(lithium diffusion coefficient:~10−9 cm^2 s^−1).In addition,significant insight into the reaction mechanism of the V3O5 microcrystals in concomitant its phase evolution are obtained from ex-situ XRD study,revealing that the V3O5 microcrystals undergo intercalation reaction with insignificant structural change in response to lithiation/delithiation.

关键词： high-rate capability intercalation chemistry lithium-ion battery oxyvanite V3O5 anode