检索结果-内蒙古大学图书馆

Boosting photocatalytic hydrogen evolution of g-C_(3)N_(4) catalyst via lowering the Fermi level of co-catalyst

Nano Research 2022年第2期15卷 1128-1134页

作者： Hairui Cai Bin Wang Laifei Xiong Jinglei Bi Hanjing Hao Xiaojing Yu Chao Li Jiamei Liu Shengchun Yang MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter Key Laboratory of Shaanxi for Advanced Materials and Mesoscopic PhysicsState Key Laboratory for Mechanical Behavior of MaterialsSchool of PhysicsXian Jiaotong UniversityNo.28 West Xianning RoadXi'an 710049China Shaanxi Collaborative Innovation Center for Hydrogen Fuel Cell Performance Improvement Xian Jiaotong UniversityNo.28 West Xianning RoadXi'an 710049China School of Materials Science and Engineering Xi'an University of TechnologyXi'an 710048China Instrument Analysis Center of Xian Jiaotong University Xian Jiaotong UniversityNo.28 West Xianning RoadXi'an 710049China

The photocatalytic performances are highly dependent on the charge separation and surface reaction kinetics of *** at figuring out the effects of co-catalyst with the lower Fermi level on photocatalytic activity,we tuned the Fermi level of Pt nanoparticles on g-C_(3)N_(4)(GCN)by introducing Co *** results show that lowering the Fermi level of co-catalyst does not alter light absorption of GCN due to the invariable ***,Pt_(3)Co with a lower Fermi level contributes less positive influence on charge separation in GCN due to an opposite effect from the stronger electron-trap ability of Pt_(3)Co and increased band bending in GCN-Pt_(3)*** density functional theory(DFT)calculations indicate that GCN-Pt_(3)Co has faster surface reaction kinetics than GCN-Pt,owing to easier dissociation of H_(2)O molecules and faster desorption of H^(*)on Pt_(3)***,GCN-Pt_(3)Co exhibits an excellent H_(2) evolution rate with 2.91 mmol g^(-1)·h^(-1),which 2.67 times that of GCN-Pt.

关键词： Schottky heterojunction surface reactions band bending Fermi level photocatalytic hydrogen evolution

来源：评论

学校读者我要写书评

暂无评论

Enhanced Ablative Resistance of C/C Composites with Densified Zrb2-Based Ceramics by Incorporation of Mo as Interface Layer

SSRN

引用

SSRN 2022年

作者： Zou, Hailiang Zhang, Jinyong Zou, Ji Ping, Hang Wang, Weimin Ren, Lin Fu, Zhengyi Zhang, Fan The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei LongZhong Laboratory Xiangyang441100 China

ZrB 2 -ZrC-SiC-Mo-C/C (ZZS-Mo-C/C) composites were synthesised in this study using reaction spark plasma sintering at a low temperature. Furthermore, we investigated the densification process, microstructure, interfacial bonding, ablative properties, and underlying mechanism of the ZZS-Mo-C/C composites. Before and after ablation, the specimen exhibited excellent interfacial bonding, indicating that the presence of the Mo-foil transition layer enables an optimal connection between ZZS and C/C. Additionally, SEM analysis revealed that the ZZS ceramics had a dense structure, thereby preventing oxygen from diffusing further into the matrix. The results indicate that ZZS-Mo-C/C exhibits superior oxidation resistance when exposed to an oxygen-acetylene flame. © 2022, The Authors. All rights reserved.

关键词： Oxidation resistance

来源：评论

学校读者我要写书评

暂无评论

Near-equiatomic high-entropy decagonal quasicrystal in Al20Si20Mn20Fe20Ga20

引用

Science China materials 2021年第2期64卷 440-447页

作者： Haikun Ma Liangqun Zhao Zhi-Yi Hu Dinghao Miao Ruixuan Li Tulai Sun He Tian Tiantian Zhang Hua Li Yong Zhang Zhanbing He State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing100083China Nanostructure Research Centre(NRC) State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan430070China School of Materials Science and Engineering Zhejiang UniversityHangzhou310027China

High-entropy alloys(HEAs)contain multiple principal alloying elements,but usually with simple crystal *** are structurally complex phases,but are generally dominated by only one ***,nearequiatomic high-entropy quasicrystals have rarely been reported because they are difficult to prepare experimentally and predict ***,the preparation and crystal structures of near-equiatomic high-entropy quasicrystals have drawn much *** report a quinary decagonal quasicrystal(DQC)with near-equiatomic alloying elements in Al20Si20Mn20Fe20Ga20 melt-spun ribbons,which is the first to our ***,the structural features of the DQC are characterized in *** configurational entropy of both the alloy and DQC satisfies the entropy-based criterion for HEAs,suggesting a high-entropy *** findings provide a new strategy to develop high-entropy quasicrystals.

关键词： high-entropy alloys decagonal quasicrystal high-entropy quasicrystals melt-spun ribbons high-angle annular dark-field scanning transmission electron microscopy

来源：评论

学校读者我要写书评

暂无评论

Minimizing tin(Ⅱ) oxidation using ethylhydrazine oxalate for high-performance all-perovskite tandem solar cells

引用

Journal of Semiconductors 2025年第5期 91-98页

作者： Jianhua Zhang Xufeng Liao Weisheng Li Yutian Tian Qinyang Huang Yitong Ji Guotang Hu Qingguo Du Wenchao Huang Donghoe Kim Yi-Bing Cheng Jinhui Tong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology School of Art and Design Wuhan University of Technology School of Information Engineering Wuhan University of Technology Department of Materials Science and Engineering Korea University Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory

All-perovskite tandem solar cells（ATSCs） have the potential to surpass the Shockley-Queisser efficiency limit of conventional single-junction devices. However, the performance and stability of mixed tin–lead（Sn–Pb） perovskite solar cells（PSCs）, which are crucial components of ATSCs, are much lower than those of lead-based perovskites. The primary challenges include the high crystallization rate of perovskite materials and the susceptibility of Sn2+oxidation, which leads to rough morphology and unfavorable p-type self-doping. To address these issues, we introduced ethylhydrazine oxalate（EDO） at the perovskite interface, which effectively inhibits the oxidation of Sn2+and simultaneously enhances the crystallinity of the perovskite. Consequently, the EDO-modified mixed tin-lead PSCs reached a power conversion efficiency（PCE） of 21.96% with high reproducibility. We further achieved a 27.58% efficient ATSCs by using EDO as interfacial passivator in the Sn-Pb PSCs.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The Ultra-High Softening Resistance Mediated by Strong Pinning of Grain Boundary from Nanometer Al 2O 3 Particles in an ADS-Copper Alloy

SSRN

引用

SSRN 2023年

作者： Liu, Feixiang Liu, Xinhua Xie, Guoliang Wu, Yuan Chen, Cunguang Key Laboratory for Advanced Materials Processing Ministry of Education Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing100083 China

An Al2O3 dispersion strengthened (ADS) alloy with ultra-high softening temperature of ~1200 K was fabricated by the in-situ internal oxidation and reduction method. The evolution of the nanometer Al2O3 particles, grain size, and consequently the softening behavior of this ADS alloy, was investigated by conducting the annealing treatment in the range from 673 K to 1273 K for 60 min. These refined nanometer Al2O3 particles were found to be highly stable at elevated temperatures, leading to the high dislocation density and grain boundary stability of the matrix. The average grain size was found to increase extremely slowly from ~0.60 μm to ~0.74 μm with increasing annealing temperatures from 773 K to 1273 K. A criterion for grain boundaries migration and softening was established based on the competition between grain growth and pinning effect of Al2O3 particles. The strong pinning effect of Al2O3 particles was found when the grain size was between the lower limit (about 400-500 nm) and upper limit (2.18 μm). The occurrence of softening behavior was attributed to the rapid increase of the proportion of the grains larger than the upper limit. A modified Hall-Petch relationship was established by introducing the integration of the grain size distribution, which can describe this correlation between softening behavior and the pinning effect of Al2O3 particles. The current study not only sheds light on the further understanding the softening mechanism of ADS copper alloy, but also provides a useful route for designing copper alloy with high softening resistance. © 2023, The Authors. All rights reserved.

关键词： Grain boundaries

来源：评论

学校读者我要写书评

暂无评论

Correction: Duetting electronic structure modulation of Ru atoms in RuSe2@NC enables more moderate H* adsorption and water dissociation for hydrogen evolution reaction

引用

Journal of materials Chemistry A 2022年第18期10卷 10242-10243页

作者： Ding Chen Ruihu Lu Youtao Yao Dulan Wu Hongyu Zhao Ruohan Yu Zonghua Pu Pengyan Wang Jiawei Zhu Jun Yu Pengxia Ji Zongkui Kou Haolin Tang Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Foshan Xianhu Laboratory Foshan 528200 China State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China

Correction for ‘Duetting electronic structure modulation of Ru atoms in RuSe2@NC enables more moderate H* adsorption and water dissociation for hydrogen evolution reaction’ by Ding Chen et al., J. Mater. Chem. A, 20...

Correction for ‘Duetting electronic structure modulation of Ru atoms in RuSe₂@NC enables more moderate H* adsorption and water dissociation for hydrogen evolution reaction’ by Ding Chen et al., J. Mater. Chem. A, 2022, 10, 7637–7644, https://***/10.1039/d2ta01032a.

关键词：

来源：评论

学校读者我要写书评

暂无评论

CdS nanosheets decorated with Ni@graphene core-shell cocatalyst for superior photocatalytic H_(2) production

引用

Journal of materials Science & technology 2020年第21期56卷 170-178页

作者： Tingmin Di Liuyang Zhang Bei Cheng Jiaguo Yu Jiajie Fan School of Materials Science and Engineering Wuhan Institute of TechnologyWuhan 430205China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China

A novel cocatalyst,*** nickel nanoparticles encapsulated in few-layer graphene(Ni@C),is obtained by carbonization of metal–organic frameworks(MOF)and leaching treatment of hydrochloric *** is selected as the cocatalyst for CdS nanosheets,forming CdS-Ni@C *** remarkably improves the photocatalytic activities of CdS nanosheets due to the synergistic effect of Ni nanoparticles and graphene *** addition,the Ni nanoparticles encapsulated by graphene layers effectively isolate Ni from the ambient,which avoids contamination and curbs *** larger work function of Ni@C and outstanding conductivity of graphene promote the electron transfer from CdS to Ni@C,suppressing the recombination of photogenerated carriers and facilitating the separation of photogenerated electronhole *** strategy by adopting this novel cocatalyst provides a new solution to the improvement of the photocatalytic hydrogen production.

关键词： CdS nanosheets Photocatalytic hydrogen production Nickel Graphene Core-shell cocatalyst Metal-organic frameworks(MOF)

来源：评论

学校读者我要写书评

暂无评论

Scalable fabrication and active site identification of MOF shell-derived nitrogen-doped carbon hollow frameworks for oxygen reduction

引用

Journal of materials Science & technology 2021年第7期66卷 186-192页

作者： Jiashen Meng Ziang Liu Xiong Liu Wei Yang Lianzhou Wang Yan Li Yuan-Cheng Cao Xingcai Zhang Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and NanotechnologyThe University of QueenslandSt LuciaQLD4072Australia Shenzhen Power Supply Col.Ltd. Shenzhen CityChina State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan430074China John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA02138United States

Nitrogen-doped carbon materials as promising oxygen reduction reaction(ORR) electrocatalysts attract great interest in fuel cells and metal-air batteries because of their relatively high activity, high surface area, high conductivity and low cost. To maximize their catalytic efficiency, rational design of efficient electrocatalysts with rich exposed active sites is highly desired. Besides, due to the complexity of nitrogen species, the identification of active nitrogen sites for ORR remains challenging. Herein, we develop a facile and scalable template method to construct high-concentration nitrogen-doped carbon hollow frameworks(NC), and reveal the effect of different nitrogen species on theirORRactivity on basis of experimental analysis and theoretical calculations. The formation mechanism is clearly revealed, including low-pressure vapor superassembly of thin zeolitic imidazolate framework(ZIF-8) shell on ZnO templates,in situ carbonization and template removal. The obtained NC-800 displays better ORR activity compared with other NC-700 and NC-900 samples. Our results indicate that the superior ORR activity of NC-800 is mainly attributed to its content balance of three nitrogen species. The graphitic N and pyrrolic N sites are responsible for lowering the working function, while the pyridinic N and pyrrolic N sites as possible active sites are beneficial for increasing the density of states.

关键词： MOF shell Nitrogen-doped carbon Hollow framework Oxygen reduction Active nitrogen sites

来源：评论

学校读者我要写书评

暂无评论

Recent progress in perovskite solar cells:from device to commercialization

引用

Science China Chemistry 2022年第12期65卷 2369-2416页

作者： Xinhui Luo Xuesong Lin Feng Gao Yang Zhao Xiaodong Li Liqing Zhan Zexiong Qiu Jin Wang Cong Chen Lei Meng Xiaofeng Gao Yu Zhang Zijian Huang Rundong Fan Huifen Liu Yanrun Chen Xiaoxue Ren Jiahong Tang Chun-Hao Chen Dong Yang Yongguang Tu Xiao Liu Dongxue Liu Qing Zhao Jingbi You Junfeng Fang Yongzhen Wu Hongwei Han Xiaodan Zhang Dewei Zhao Fuzhi Huang Huanping Zhou Yongbo Yuan Qi Chen Zhaokui Wang Shengzhong(Frank)Liu Rui Zhu Jotaro Nakazaki Yongfang Li Liyuan Han State Key Laboratory of Metal Matrix Composites School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Physics and Electronic Science Engineering Research Center of Nanophotonics&Advanced InstrumentMinistry of EducationEast China Normal UniversityShanghai 200241China Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage CenterSolar Energy Research CenterNankai UniversityTianjin 300350China College of Materials Science and Engineering&Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationSichuan UniversityChengdu 610065China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationSchool of Materials Science and EngineeringPeking UniversityBeijing 100871China School of Physics and Electronics Hunan Key Laboratory of Nanophotonics and DevicesCentral South UniversityChangsha 410083China Experimental Center for Advanced Materials School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Jia

Perovskite solar cells(PSCs) are undergoing rapid development and the power conversion efficiency reaches 25.7% which attracts increasing attention on their commercialization *** this review,we summarized the recent progress of PSCs based on device structures,perovskite-based tandem cells,large-area modules,stability,applications and ***,the challenges and perspectives are discussed,aiming at providing a thrust for the commercialization of PSCs in the near future.

关键词： perovskite solar cells device engineering stability application

来源：评论

学校读者我要写书评

暂无评论

受水车启发的、在饱和盐水中也能实现高效和稳定的太阳能淡化的旋转蒸发器

引用

Science Bulletin 2023年第15期68卷 1640-1650,M0004页

作者：蒋函锦刘行航王海涛王德文郭亚楠王冬高岗王笑夷胡超权 State Key Laboratory of Superhard Materials Key Laboratory of Automobile Materials of Ministry of EducationJilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsSchool of Materials Science and EngineeringJilin UniversityChangchun 130012China School of Fashion and Textiles The Hong Kong Polytechnic UniversityHong KongChina State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China College of Chemical Engineering Northeast Electric Power UniversityJilin 132012China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China Key Laboratory of Optical System Advanced Manufacturing Technology Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China State Key Laboratory of Applied Optics Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China

太阳能海水淡化是解决全球淡水短缺的最有前景方法之一.然而,传统的蒸发体在高盐度海水中遭遇了盐累积带来的蒸发速率下降甚至失效的瓶颈.受古代水车的启发,本文开发了一种自适应旋转蒸发器,其可以在任意浓度的盐水中实现长期高效的太... 详细信息

太阳能海水淡化是解决全球淡水短缺的最有前景方法之一.然而,传统的蒸发体在高盐度海水中遭遇了盐累积带来的蒸发速率下降甚至失效的瓶颈.受古代水车的启发,本文开发了一种自适应旋转蒸发器,其可以在任意浓度的盐水中实现长期高效的太阳能海水淡化.这种蒸发器是一种双硫化物负载的滚筒式生物质炭.借助了木材天然的水传输通道和分层结构,蒸发器具有杰出的水供应和热定位能力.实验和数值模拟表明,归因于其低密度及独特的亲疏水特性,这个蒸发器能够在盐结晶产生的重心偏移下周期性转动以实现自动盐移除.这使得这个蒸发体甚至可以在饱和盐水(26.47%)中,24 h内保持2.8 kg m^(-2)h^(-1)的高蒸发速率,这是过去一直无法实现的.因此,这项概念验证工作展示了一种不受浓度和运行时间限制的、自旋转诱导脱盐的蒸发器.

关键词： Adaptively rotating evaporator Self-removal of salt Waterwheel-inspired Stable solar desalination

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：