检索结果-南通市图书馆

sulfur vacancies and heterogeneous interfaces promote high performance sodium storage of bimetallic chalcogenide hollow nanospheres

引用

Journal of Energy Chemistry 2024年第8期95卷 596-610页

作者： Shiyue Cao Xiaoting Xu Qiming Liu Huijuan Zhu Ting Hu Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education School of Physics and Technology Wuhan University

Transition metal sulfides have high theoretical capacities and are considered as potential anode materials for sodium-ion batteries.However,due to low inherent conductivity and significant volume expansion,the electrochemical performance is greatly limited.In this study,a nickel/manganese sulfide material(Ni0.96Sx/MnSy-NC) with adjustable sulfur vacancies and heterogeneous hollow spheres was prepared using a simple method.The introduction of a concentration-adjustable sulfur vacancy enables the generation of a heterogeneous interface between bimetallic sulfide and sulfur vacancies.This interface collectively creates an internal electric field,improving the mobility of electrons and ions,increasing the number of electrochemically active sites,and further optimizing the performance of Na+storage.The direction of electron flow is confirmed by Density functional theory（DFT） calculations.The hollow nano-spherical material provides a buffer for expansion,facilitating rapid transfer kinetics.Our innovative discovery involves the interaction between the ether-based electrolyte and copper foil,leading to the formation of Cu9S5,which grafts the active material and copper current collector,reinforcing mechanical supporting.This results in a new heterostructure of Cu9S5with Ni0.96Sx/MnSy,contributing to the stabilization of structural integrity for long-cycle performance.Therefore,Ni0.96Sx/MnSy-NC exhibits excellent electrochemical properties following our modification route.Regarding stability performance,Ni0.96Sx/MnSy-NC demonstrates an average decay rate of 0.00944% after 10,000 cycles at an extremely high current density of 10000 mA g-1,A full cell with a high capacity of 304.2 mA h g-1was also successfully assembled by using Na3V2（PO4）3/C as the cathode.This study explores a novel strategy for interface/vacancy co-modification in the fabrication of high-performance sodium-ion batteries electrode.

关键词： Heterogeneous interface Interactions Sodium ion batteries sulfur vacancies

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

sulfur vacancies Tune the Charge Distribution of NiCo_(2)S_(4) for Boosting the Energy Density of Stretchable Yarn‑Based Zn Ion Batteries

引用

Advanced Fiber Materials 2023年第2期5卷 650-661页

作者： Xinyue Cheng Xu Yang Yanan Zhang Pengfei Lv Jixing Yang Fenglin Huang Qufu Wei Key Laboratory of Eco‑Textiles Ministry of EducationJiangnan UniversityWuxi 214122People’s Republic of China Fujian Key Laboratory of Novel Functional Textile Fibers and Materials Minjiang UniversityFuzhou 350108People’s Republic of China School of Materials Science and Engineering Tianjin UniversityTianjin 300072People’s Republic of China State Key Laboratory of Molecular Engineering of Polymers Fudan UniversityShanghai 200438People’s Republic of China

Yarn-based batteries with the dual functions of wearable and energy storage have demonstrated promising potential in wearable energy textiles.However,it is still an urgent problem to construct efficient and flexible electrodes while optimize the configuration of yarn-based batteries to maintain excellent electrochemical performance under different mechanical deformations.Herein,NiCo_(2)S_(4-x) nanotube arrays with tunable S-vacancies are constructed on carbon yarn(CY)(NiCo_(2)S_(4-x)@CY)by a facile hydrothermal strategy.The aqueous zinc-ion batteries(ZIBs)with NiCo_(2)S_(4-x)@CY as cathodes exhibit exceptional discharge capacity(271.7 mAh g^(-1))and outstanding rate performance(70.9%capacity retention at 5 A g^(-1)),and reveal a maximum power density of 6,059.5 W kg^(-1) and a maximum energy density of 432.2 Wh kg^(-1).It is worth noting that the tunable S-vacancies promote the surface reconfiguration and phase transitions of NiCo_(2)S_(4-x),thereby enhancing the conductivity and charge storage kinetics.The high reactivity and cycling stability of NiCo_(2)S_(4-x)@CY can be related to the discharge products of S-doped NiO and CoO.Furthermore,flexible stretchable yarn-based ZIBs with wrapped yarn structures are constructed and exhibit excellent tensile stability and durability under a variety of mechanical deformations.As a proof of concept,the ZIBs integrated into the fabric show excellent electrochemical performance even in response to simultaneous stretching and bending mechanical deformations.The proposed strategy provides novel inspiration for the development of highly efficient and economical yarn-based ZIBs and wearable energy textiles.

关键词： sulfur vacancies NiCo_(2)S_(4-x)nanotube arrays Stretchable Yarn-based zinc ion batteries Wearable energy textiles

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Embedding laser-generated CdTe nanocrystals into ultrathin ZnIn_(2)S_(4) nanosheets with sulfur vacancies for boosted photocatalytic H_(2) evolution

引用

Journal of Materials Science & Technology 2023年第35期166卷 113-122页

作者： Z.G.Tai G.T.Sun X.H.Zhang X.B.Yang T.Wang Z.Y.Fang Q.Ye L.C.Jia H.Q.Wang State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518063China School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119China

To suppress the inner charge recombination and inject vast electrons,CdTe nanocrystals are embedded into ultrathin ZnIn_(2)S_(4) nanosheets to construct ZnIn_(2)S_(4)/CdTe heterostructures,where the nanocrystals are generated by a laser irradiation method.The optimal ZnIn_(2)S_(4)/CdTe heterojunction exhibits an excellent catalytic activity of 24.3 mmol/h/g,which is relatively high among the ZnIn_(2)S_(4)-based photocatalysts with-out noble metals.This enhancement is ascribed to a win-win mechanism of nanoscale heterojunctions and sulfur vacancies.The strong electron coupling effect,which is verified by density functional the-ory(DFT)calculations,impels the photo-generated electrons transfer from CdTe to ZnIn_(2)S_(4),boosting the charge separation.Meanwhile,the sulfur vacancies existing in ZnIn_(2)S_(4) can capture photoelectrons and act as active sites,facilitating the H_(2) generation reaction.In addition,the ZnIn_(2)S_(4) base and the ZnIn_(2)S_(4)/CdTe heterojunction also possess an evident photothermal effect and renewable cycle phenomena,enhancing the photocatalytic performance.This research provides new insights into the regulation of charge transfer through embedding nanocrystals.

关键词： Photocatalysis Hydrogen evolution Laser irradiation Heterostructure sulfur vacancies

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Design and synthesis of two dimensional-ZnIn2S4 nanosheets with sulfur vacancies for improving photocatalytic hydrogen production performance

引用

Progress in Natural Science:Materials International 2023年第5期33卷 607-615页

作者： Jianguo He Guanghui Zhang Yichen Jiang Jianfa Jia Jianliang Cao College of Chemistry and Chemical Engineering Henan Polytechnic University State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization Henan Polytechnic University

The remarkable properties exhibited by two-dimensional(2D) photocatalytic materials,differing from bulk materials,have captivated significant interest.In this study,a hexagonal-phase ZnIn2S4were synthesized using thiosulfate,thioacetamide,and L-cysteine as sulfur sources(denoted as ZIS-A,ZIS-B and ZIS-C),respectively.The synthesized ZnIn2S4 exhibited varying morphologies and photocatalytic properties,which were characterized through XRD,SEM,TEM,EPR,XPS and so on.The results confirmed that ZIS-B with 2D nanosheets structures exhibited superior photocatalytic properties compared with that of the flower-like spheres and block ZnIn2S4samples.The hydrogen evolution rate of the ZIS-B is 3653 μmol g-1h-1,which is 3.1 times than that of the other samples.This improvement was attributable to that the ZIS-B have 2D nanosheets structures and sulfur vacancies.Notably,the 2D nanosheets structure endowed ZnIn2S4with a larger surface area and abundant reactive sites for efficient evolution reaction.Additionally,the presence of sulfur vacancies served as active sites,facilitating carrier transport and ultimately promoting the rate of photocatalytic hydrogen evolution.These results present a novel method for optimizing 2D ZnIn2S4photocatalyst to improve the photocatalytic hydrogen evolution.

关键词： Nanosheets Photocatalytic hydrogen production sulfur vacancies ZnIn2S4

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Co-Construction of sulfur vacancies and Heterogeneous Interface into Ni_(3)S_(2)/MoS_(2) Catalysts to Achieve Highly Efficient Overall Water Splitting

引用

Chinese Journal of Structural Chemistry 2022年第8期41卷 37-43页

作者： Zhaoyang An Hui Xue Jing Sun Niankun Guo Tianshan Song Jiawen Sun Yi-Ru Hao Qin Wang College of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot 010021China

Integrating the advantages of anion vacancies and heterostructures into the catalytic materials may increase the binding affinities to intermediates, provide more active sites, and significantly promote the activity of overall water splitting. However, the successful assembly of anion vacancies and heterostructures for high-efficiency water splitting performance is still challenging. In this work, we ingeniously present the co-construction of sulfur vacancies and heterogeneous interface into Ni_(3)S_(2)/MoS_(2) catalysts on nickel foam(NF). The introduction of sulfur vacancies and Ni_(3)S_(2)/MoS_(2) heterostructures can significantly improve electron and ion transport, effectively improve structural stability, and enhance overall water splitting activity. The obtained VSNi_(3)S_(2)/MoS_(2) catalysts(VS stands for sulfur vacancies) exhibit superior OER and HER activities,and the overpotentials for OER and HER are 180 and 71 mV at 10 mA·cm^(-2), respectively. Furthermore, a low water splitting voltage of 1.46 V is required at 10 mA·cm^(-2) for the VS-Ni_(3)S_(2)/MoS_(2) catalysts, which is considerably lower than most that of water splitting electrocatalysts currently reported. This work offers an effective mean for the preparation of catalysts with both anion vacancies and heterostructures for achieving high-performance alkaline overall water splitting.

关键词： sulfur vacancies heterostructures transition metal chalcogenides overall water splitting

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Interfacial/bulk synergetic effects accelerating charge transferring for advanced lithium-ion capacitors

引用

Chinese Chemical Letters 2024年第6期35卷 168-175页

作者： Chang Liu Zirui Song Xinglan Deng Shihong Xu Renji Zheng Wentao Deng Hongshuai Hou Guoqiang Zou Xiaobo Ji School of Chemistry and Chemical Engineering Hunan Institute of EngineeringXiangtan 411104China College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-Containing Mineral Resources School of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China

The exploration of advanced materials through rational structure/phase design is the key to develop highperformance lithium-ion capacitors(LICs).However,high complexity of material preparation and difficulty in quantity production largely hinder the further development.Herein,Cu_(5)FeS_(4-x)/C(CFS@C)heterojunction with rich sulfur vacancies has successfully achieved from natural bornite,presenting low costeffective and bulk-production prospect.Density functional theory(DFT)calculations indicate that rich vacancies in bulk phase can decrease band gap of bornite and thus improve its intrinsic electron conductivity,as well as the heterojunction spontaneously evokes a built-in electric field between its interfacial region,largely reducing the migration barrier from 1.27 e V to 0.75 e V.Benefited from these merits,the CFS@C electrodes deliver outperformed lithium storage performance,e.g.,high reversible capacity(822.4m Ah/g at 0.1 A/g),excellent cycling stability(up to 820 cycles at 2 A/g and 540 cycles at 5 A/g with respective capacity retention of over or nearly 100%).With CFS@C as anode and porous carbon nanosheets(PCS)as cathode,the assembled CFS@C//PCS LIC full cells exhibit high energy/power density characteristics of 139.2 Wh/kg at 2500 W/kg.This work is expected to offer significant insights into structure modifications/devising toward natural minerals for advanced energy-storage systems.

关键词： Bulk/interfacial modification Heterostructure sulfur vacancies Lithium ion capacitors Capacitors

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Introducing sulfur vacancies and in-plane SnS_(2)/SnO_(2) heterojunction in SnS_(2) nanosheets to promote photocatalytic activity

引用

Chinese Chemical Letters 2020年第10期31卷 2809-2813页

作者： Keyan Hu Chen Ming Yiting Liu Chong Zheng Shaoning Zhang Dong Wang Wei Zhao Fuqiang Huang State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China School of Mechanical and Electrical Engineering Jingdezhen Ceramic InstituteJingdezhen 333403China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China Department of Chemistry and Biochemistry Northern Illinois UniversityDeKalbIllinois 60115United States Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Due to the relatively sluggish charge carrier separation in metal sulfides,the photocatalytic activity of them is still far lower than expected.Herein,sulfur vacancies and in-plane SnS_(2)/SnO_(2) heterojunction were successfully introduced into the SnS_(2) nanosheets through high energy ball-milling.These defective structures were studied by the electron paramagnetic resonance,Raman spectra,X-ray photoelectron spectroscopy,and high-resolution transmission electron microscope analyses.The sulfur vacancies and in-plane heterojunctions strongly accelerate the separation of photoexcited electron-hole pairs,as confirmed by the photo luminesce nce emission spectra and time-resolved photoluminescence decay spectra.The introduction of sulfur vacancies and in-plane heterojunction in SnS_(2) nanosheets results in roughly six times higher photodegrading rate for methyl orange and four times higher photocatalytic reduction rate of Cr6+than those of pure SnS_(2) nanosheets.

关键词： sulfur vacancies In-plane heterojunction SnS_(2)Nanosheets Ball-milling Charge carrier separation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Design strategy for low-temperature sulfur etching to achieve high-performance hollow multifunctional electrode material

引用

Journal of Materials Science & Technology 2022年第24期119卷 209-218页

作者： Hui Wen Ziyu Yi Zhenyu Hu Rui Guo Xuanwen Liu School of Materials Science and Engineering Northeastern UniversityShenyang 110819China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China

Zeolite Imidazole Framework(ZIF)has the advantages of large specific surface area,high porosity,and easy functionalization,so it looked like one of the most promising energy storage and conversion materials.In the meantime,transition metal oxides and sulfides have been widely used in environmental and energy conversion applications.Hence,a NaOH-assisted thioacetamide etching strategy is,therefore,designed with the metal-organic framework as precursor to realize the hollow nanostructure of ZIF bimetallic sulfide(Sx-CoCd-350)with abundant sulfur vacancies for enhanced catalysts oxygen evolution reaction(OER)/hydrogen evolution reaction(HER)performance and capacitance performance of capacitor.The overpotential of S_(2)-CoCd-350 in the OER process is 355 m V at 50 m A cm^(-2),which is substantially lower than other reported ZIF-based catalysts.S_(2)-CoCd-350 has an overpotential of 84 m V at 10 m A cm^(-2)when employed as HER catalyst.Furthermore,the S_(2)-CoCd-350 electrode did not alter appreciably during a long-term durability test of more than 10 h.More impressively,S_(2)-Co Cd-350 matches the activated carbon(AC)electrode with excellent capacitance performance 1220μWh cm^(-2)energy density(at 3370μW cm^(-2))and 25,000μW cm^(-2)(at 700μWh cm^(-2))maximum power density.In addition,the assembled supercapacitor has excellent cycling stability.

关键词： Electrocatalyst OER/HER Supercapacitor sulfur vacancies Hollow nanostructure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Interfacial and vacancies Engineering of Copper Nickel Sulfide for Enhanced Oxygen Reduction and Alcohols Oxidation Activity

引用

Energy & Environmental Materials 2023年第5期6卷 288-298页

作者： Zhaoyang Wang Xiaobin Liao Min Zhou Fuzhi Huang Kwadwo Asare Owusu Jiantao Li Zifeng Lin Qi Sun Xufeng Hong Congli Sun Yibing Cheng Yan Zhao Liqiang Mai State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and Engineering Wuhan University of TechnologyNo.122 Luoshi RoadWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China The Institute of Technological Sciences Wuhan UniversityWuhan 430072China Department of Materials Science and Engineering Monash UniversityClayton Victoria 3800Australia Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu hydrogen ValleyFoshan 528216China

Rational design and construction of highly efficient nonprecious electrocatalysts for oxygen reduction and alcohols oxidation reactions(ORR,AOR)are extremely vital for the development of direct oxidation alkaline fuel cells,metal-air batteries,and water electrolysis system involving hydrogen and value-added organic products generation,but they remain a great challenge.Herein,a bifunctional electrocatalyst is prepared by anchoring CuS/NiS_(2)nanoparticles with abundant heterointerfaces and sulfur vacancies on graphene(Cu_(1)Ni_(2)-S/G)for ORR and AOR.Benefiting from the synergistic effects between strong interfacial coupling and regulation of the sulfur vacancies,Cu_(1)Ni_(2)-S/G achieves dramatically enhanced ORR activity with long term stability.Meanwhile,when ethanol is utilized as an oxidant for AOR,an ultralow potential(1.37 V)at a current density of 10 mA cm-2 is achieved,simultaneously delivering a high Faradaic efficiency of 96%for ethyl acetate production.Cu_(1)Ni_(2)-S/G also exhibits catalytic activity for other alcohols electrooxidation process,indicating its multifunctionality.This work not only highlights a viable strategy for tailoring catalytic activity through the synergetic combination of interfacial and vacancies engineering,but also opens up new avenues for the construction of a self-driven biomass electrocatalysis system for the generation of value-added organic products and hydrogen under ambient conditions.

关键词： alcohols oxidation reaction heterointerface metal sulfide oxygen reduction reaction sulfur vacancies

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Anchoring Ni single atoms on sulfur-vacancy-enriched ZnIn_(2)S_(4) nanosheets for boosting photocatalytic hydrogen evolution

引用

Journal of Energy Chemistry 2021年第7期30卷 408-414页

作者： Jingwen Pan Gongxin Zhang Zhongjie Guan Qianyu Zhao Guoqiang Li Jianjun Yang Qiuye Li Zhigang Zou National&Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials Engineering Research Center for nanomaterials Co.LtdHenan UniversityKaifeng 475004HenanChina School of Pharmacy Henan UniversityKaifeng 475004HenanChina School of Physics&Electronics Henan UniversityKaifeng 475004HenanChina Jiangsu Key Laboratory for Nano Technology National Laboratory of Solid State Microstructures and Department of PhysicsNanjing UniversityNanjing 210093JiangsuChina

Structure manipulation of photocatalysts at an atomic scale is a promising way to improve its photocatalytic performance.Herein,we realize the anchoring of single Ni atoms on the ZnIn_(2)S_(4) nanosheets with rich sulfur vacancies.Experimental results demonstrate that single Ni atoms induce the formation of NiO-M(Zn/In) atomic interface,which can efficiently promote the carriers separation and prolong the carrier life time.In addition,in situ electron spin resonance spectroscopy(ESR) confirms that the single Ni atoms act as an electron trapping center for protons reduction.As a result,the single Ni atoms decorated ZnIn_(2)S_(4) nanosheets with rich sulfur vacancies(Ni/ZnIn_(2)S_(4)-RVs) shows a hydrogen evolution rate up to 89.4 μmol h^(-1), almost 5.7 and 2.3 times higher compared to that of ZnIn_(2)S_(4) nanosheets with poor sulfur vacancies and rich sulfur vacancies(denoted as ZnIn_(2)S_(4)-PVs and ZnIn_(2)S_(4)-RVs).This work opens up a new perspective manipulating the single-atom cocatalyst and sulfur vacancy on sulfide supports for improving photocatalytic hydrogen evolution.

关键词： ZnIn_(2)S_(4)nanosheets sulfur vacancies Single-atom Ni Charge carriers separation Photocatalytic hydrogen evolution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：