检索结果-南通市图书馆

Phosphorus-doped NiS_(2)electrocatalyst with a hybrid structure for hydrogen evolution

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2022年第7期65卷 1506-1512页

作者： ZHOU Qi LIU HaoRui JIAO SunZhi FENG ChenChen State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050China School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China College of Mechanical Engineering Longdong UniversityQingyang 745000China

In this article,P-NiS_(2)/Ni_(x)P electrocatalysts were synthesized by dealloying the Ni-Al precursor followed by phosphosulfide treatment.We found that the hybrid structure of P-NiS_(2)/Ni_(x)P provides rich active sites for the surface hydrogen evolution reaction (HER),and the doping of P enhances the electronic conductivity of electrodes.In particular,the obtained electrode shows a low overpotential of 196 mV at 10 mA cm^(-2)and a small Tafel slope of only 110 mV dec^(-1)in the HER.Meanwhile,longterm constant current electrolysis test experiments indicate that P-NiS_(2)/Ni_(x)P has good service stability.This research will help to open a new window on the design and fabrication of HER electrocatalysts.

关键词： nickle phosphosulfides hybrid structure hydrogen evolution reaction dealloying

Room temperature NO_2 gas sensing of Au-loaded tungsten oxide nanowires/porous silicon hybrid structure

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2016年第2期25卷 504-509页

作者：王登峰梁继然李昌青闫文君胡明 School of Electronics and Information Engineering Tianjin University

In this work, we report an enhanced nitrogen dioxide（NO_2） gas sensor based on tungsten oxide（WO_3）nanowires/porous silicon（PS） decorated with gold（Au） nanoparticles. Au-loaded WO_3 nanowires with diameters of 10 nm–25 nm and lengths of 300 nm–500 nm are fabricated by the sputtering method on a porous silicon substrate. The high-resolution transmission electron microscopy（HRTEM） micrographs show that Au nanoparticles are uniformly distributed on the surfaces of WO_3 nanowires. The effect of the Au nanoparticles on the NO_2-sensing performance of WO_3 nanowires/porous silicon is investigated over a low concentration range of 0.2 ppm–5 ppm of NO_2 at room temperature（25℃）. It is found that the 10-？ Au-loaded WO_3 nanowires/porous silicon-based sensor possesses the highest gas response characteristic. The underlying mechanism of the enhanced sensing properties of the Au-loaded WO_3 nanowires/porous silicon is also discussed.

关键词： Au-loaded WO3 nanowires hybrid structure gas sensing

Synthesis and room-temperature NO_2 gas sensing properties of a WO_3 nanowires/porous silicon hybrid structure

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2014年第5期23卷 600-606页

作者：曾鹏张平胡明马双云闫文君 School of Electronics and Information Engineering Tianjin University

We report on the fabrication and performance of a room-temperature NO2 gas sensor based on a WO3 nanowires/porous silicon hybrid structure. The W18O49 nanowires are synthesized directly from a sputtered tungsten film on a porous silicon （PS） layer under heating in an argon atmosphere. After a carefully controlled annealing treatment, WO3 nanowires are obtained on the PS layer without losing the morphology. The morphology, phase structure, and crystallinity of the nanowires are investigated by using field emission scanning electron microscopy （FESEM）, X-ray diffractometer （XRD）, and high-resolution transmission electron microscopy （HRTEM）. Comparative gas sensing results indicate that the sensor based on the WO3 nanowires exhibits a much higher sensitivity than that based on the PS and pure WO3 nanowires in detecting NO2 gas at room temperature. The mechanism of the WO3 nanowires/PS hybrid structure in the NO2 sensing is explained in detail.

关键词： gas sensing WO3 nanowires porous silicon hybrid structure

Magic hybrid structure as multifunctional electrocatalyst surpassing benchmark Pt/C enables practical hydrazine fuel cell integrated with energy-saving H_(2)production

在线全文

学校读者我要写书评

暂无评论

eScience 2022年第4期2卷 416-427页

作者： Ziyun Li Wentao Wang Qizhu Qian Yin Zhu Yafei Feng Yangyang Zhang Huaikun Zhang Mingyu Cheng Genqiang Zhang Hefei National Research Center for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230026China Guizhou Provincial Key Laboratory of Computational Nano-Material Science Guizhou Education UniversityGuiyangGuizhou550018China

A hybrid catalyst structure can provide abundant active sites and tailored electronic properties,but the major challenge lies in achieving delicate control over its composition and architecture to improve the catalytic activity toward different electrochemical reactions simultaneously.Herein,we present the rational design of a magic hybrid structure with low Pt loading(5.90 wt%),composed of CoPt_(3)and CoPt nanoparticles supported on N-doped carbon(CoPt_(3)/CoPt⊂PLNC).Importantly,it shows superior multifunctional catalytic activity in alkaline conditions,requiring a low overpotential of 341 and 20 mV to achieve 10 mA cm^(−2)for the hydrazine oxidation reaction(HzOR)/hydrogen evolution reaction(HER),respectively,and it delivers a half-wave potential of 0.847 V for the oxygen reduction reaction(ORR).Theoretical calculations reveal that the metal-carbon hybrid modulates kinetic behavior and induces electron redistribution,achieving the energetic requirements for multiple electrocatalysis.We demonstrate sustainable H_(2)production utilizing solely the CoPt_(3)/CoPt⊂PLNC catalyst,without external electric power input,suggesting its inspiring practical utility.

关键词： Electrocatalysis hybrid structure Fuel cell Hydrazine oxidation H_(2)production

Shake table testing of a multi-tower connected hybrid structure

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

Earthquake Engineering and Engineering Vibration 2009年第1期8卷 47-59页

作者： Zhou Ying Lu Xilin Lu Wensheng He Zhijun State Key Laboratory for Disaster Reduction in Civil Engineering Tongji University Shanghai 200092 China Architectural Design and Research Institute Tongii University Shanghai 200092 China

Many single-tower reinforced concrete core wall-steel frame （RCC-SF） buildings have been built in China, but there are no buildings of different-height multi-tower hybrid system. A multi-tower RCC-SF tall building was thus studied because of its structural complexity and irregularity. First, a 1/15 scaled model structure was designed and tested on the shake table under minor, moderate, and major earthquake levels. Then, the dynamic responses of the model structure were interpreted to those of the prototype structure according to the similitude theory. Experimental results demonstrate that, despite the complexity of the structure, the lateral deformation bends as the ＂bending type＂ and the RC core walls contribute more than the steel frames to resist seismic loads. The maximum inter-story drift of the complex building under minor earthquakes is slightly beyond the elastic limitation specified in the Chinese code, and meets code requirements under major earthquakes. From the test results some suggestions are provided that could contribute favorable effect on the seismic behavior and the displacement of the building.

关键词： complex building hybrid structure scaled model shake table testing seismic performance

Numerical Investigation on Pool Boiling Mechanism of hybrid structures with Metal Foam and Square Column by LBM

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2022年第6期31卷 2293-2308页

作者： LIU Zhongyi QIN Jie WU Ziheng YUE Sijia XU Zhiguo School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

In the present study, pool boiling heat transfer performance and bubble behaviors of hybrid structures with metal foam and square column are investigated by lattice Boltzmann method. By using the vapor-liquid phase change model of Gong-Cheng and Peng-Robinson equation of state, the effects of structural parameters, including metal foam thickness, porosity, column height and ratio of column width(W) to gap spacing(D) are investigated in details. The results show that hybrid structure performs better than pure columnar structure in pool boiling heat transfer. The hybrid structure accelerates bubble growth by fluid disturbance while metal skeletons prevent the bubble escaping. The optimum ratio of column width to gap spacing decreases with the increase of heat flux and HTC(heat transfer coefficient) can achieve an increase up to 25% when W/D change from 5/3 to 1/3. The increase of column height enhances heat transfer by expanding surface area and providing space for bubble motion. The metal foam thickness and porosity have a little influence on pool boiling heat transfer performance, but they have an important effect on bubble motion in the regime.

关键词： hybrid structure metal foam square column pool boiling heat transfer lattice Boltzmann method

Interface construction of NiCo LDH/NiCoS based on the 2D ultrathin nanosheet towards oxygen evolution reaction

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第6期15卷 4986-4995页

作者： Jiahui Li Lili Wang Haojia He Yiquan Chen Zirui Gao Na Ma Bing Wang Linlin Zheng Rulin Li Yujia Wei Junqing Xu Yao Xu Bowen Cheng Zhen Yin Ding Ma State Key Laboratory of Separation Membranes and Membrane Processes School of ChemistryTiangong UniversityTianjin 300387China School of Chemical Engineering and Technology Tiangong UniversityTianjin 300387China Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering and College of Engineeringand BIC-ESATPeking UniversityBeijing 100871China College of Chemical Engineering and Materials Science Tianjin University of Science and TechnologyTianjin 300457China China Tianchen Engineering Corporation Tianjin 300400China

Carbon-free hydrogen as a promising clean energy source can be produced with electrocatalysts via water electrolysis.Oxygen evolution reaction(OER)as anodic reaction determines the overall efficiency of water electrolysis due to sluggish OER kinetics.Thus,it’s much desirable to explore the efficient and earth-abundant transition-metal-based OER electrocatalysts with high current density and superior stability for industrial alkaline electrolyzers.Herein,we demonstrate a significant enhancement of OER kinetics with the hybrid electrocatalyst arrays in alkaline via judiciously combining earth-abundant and ultrathin NiCo-based layered double hydroxide(NiCo LDH)nanosheets with nickel cobalt sulfides(NiCoS)with a facile metal-organic framework(MOF)-template-involved surface sulfidation process.The obtained NiCo LDH/NiCoS hybrid arrays exhibits an extremely low OER overpotential of 308 mV at 100 mA·cm^(−2),378 mV at 200 mA·cm^(−2)and 472 mV at 400 mA·cm^(−2)in 1 M KOH solution,respectively.A much low Tafel slope of 48 mV·dec^(−1)can be achieved.Meanwhile,with the current density from 50 to 250 mA·cm^(−2),the NiCo-LDH/NiCoS hybrid arrays can run for 25 h without any degradation.Our results demonstrate that the construction of hybrid arrays with abundant interfaces of NiCo LDH/NiCoS can facilitate OER kinetics via possible modulation of binding energy of O-containing intermediates in alkaline media.The present work would pave the way for the development of lowcost and efficient OER catalysts and industrial application of water alkaline electrolyzers.

关键词： oxygen evolution reaction hybrid structure ultrathin nanosheet layered double hydroxide surface sulfidation interface of NiCo LDH/NiCoS

Bifunctional ZnCo_(2)S_(4)/CoZn_(13) hybrid electrocatalysts for high efficient overall water splitting

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

Journal of Energy Chemistry 2022年第6期31卷 292-300,I0009页

作者： Depeng Zhao Meizhen Dai Hengqi Liu Zhongxin Duan Xiaojie Tan Xiang Wu School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870LiaoningChina Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074HubeiChina

To develop highly active and low-cost electrocatalyst is very important to improve the efficiency of water splitting.However,the current catalysts still present serious challenges due to the poor intrinsic activity and high overpotential.Herein,we report several amino induced Co-based composite catalysts.As a structure-mediating agent,ethylenediamine (EDA) can not only regulate the crystal structure and but also provide many surface amino groups.The obtained ZnCo_(2)S_(4)/CoZn_(13) catalysts show an excellent oxygen evolution reaction (OER) performance (274 mV@50 mA cm^(-2)) and the overpotential of 160 mV at-10 mA cm^(-2) for hydrogen evolution reaction (HER).For electrolysis of water,the electrocatalysts deliver a cell voltage of 1.61 V at 50 m A cm^(-2).This study provides a facile synthetic strategy to construct advanced electrocatalysts for future applications.

关键词： Electrocatalysts hybrid structure Alloys Water splitting Durability

hybrid ZnO@Au Nanorod Array for Fast and Repeatable Bacteria Inactivation

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2023年第17期41卷 2132-2142页

作者： Yu Liu Xiaoyu Zhao Xiaosa Zhang Xiaodan Jia Lie Wu Xiue Jiang College of Science Shenyang University of Chemical TechnologyShenyangLiaoning 110142China Shenyang National Laboratoryfor Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyangLiaoning 110016China State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of Scienc ChangchunJilin 130022China

Comprehensive Summary,The worldwide abuse of antibiotics and resultant antimicrobial resistance made the development of new antibacterial materials an urgent and significant issue.Herein,a hybrid ZnO@Au nanorod array with fast bacterial inactivation and excellent recyclability was reported.93%bacteria could be inactivated within 5 min ultra-sonication under indoor daylight,and the killing rate maintains above 90%after seven repeated using cycles.Antibacterial mechanism involves extracellular reactive oxygen species(ROS)generated from photocatalysis and piezoelectricity of nanorod array,intracellular ROS generation and decrease of adenosine-triphosphate(ATP)originated from electron transfer(ET)from bacteria to nanorod array,as well as mechanical effect from the nanorod,among which ET mechanism plays a major role.Large Schottky barrier from the hybrid interface not only enhances the ROS generation by promoting the charge transfer and carrier separation as well as light utilization,but also enables one-direction electron transfer from bacteria to nanorod array.The resultant continuous electron loss breaks the energy metabolism and disturbs the redox equilibrium,leading to bacterial death.This study demonstrates the great potential of hybrid structure in antibacterial applications and indicates ET as a novel effective antibacterial mechanism for semiconductor materials,which provides insights into the design of next-generation antibacterial materials.

关键词： Antibacterial hybrid structure Zinc oxide nanorod Electron transfer Reactive oxygen species Microarrays Nanocomposites Semiconductors