检索结果-南通市图书馆

Hierarchically porous Co@N-doped carbon fiber assembled by MOF-derived hollow polyhedrons enables effective electronic/mass transport:An advanced 1D oxygen reduction catalyst for Zn-air battery

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第1期76卷 117-126,I0004页

作者： Yifei zhang Quanfeng He Zihao Chen Yuqing Chi Junwei Sun Ding Yuan lixue zhang Industrial Research Institute of Nonwovens&Technical Textiles College of Textiles&ClothingQingdao UniversityQingdao 266071ShandongChina College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071ShandongChina College of Chemistry and Chemical Engineering Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM)Xiamen UniversityXiamen 361005FujianChina

Developing advanced oxygen reduction reaction(ORR)electrocatalysts with rapid mass/electron transport as well as conducting relevant kinetics investigations is essential for energy technologies,but both still face ongoing ***,a facile approach was reported for achieving the highly dispersed Co nanoparticles anchored hierarchically porous N-doped carbon fibers(Co@N-HPCFs),which were assembled by core-shell MOFs-derived hollow ***,the unique one-dimensional(1D)carbon fibers with hierarchical porosity can effectively improve the exposure of active sites and facilitate the electron transfer and mass transfer,resulting in the enhanced reaction *** a result,the ORR performance of the optimal Co@N-HPCF catalysts remarkably outperforms that of commercial Pt/C in alkaline solution,reaching a limited diffusion current density(J)of 5.85 m A cm^(-2)and a half-wave potential(E_(1/2))of 0.831 ***,the prepared Co@N-HPCF catalysts can be used as an excellent air-cathode for liquid/solid-state Zn-air batteries,exhibiting great potentiality in portable/wearable energy ***,the reaction kinetic during ORR process is deeply explored by finite element simulation,so as to intuitively grasp the kinetic control region,diffusion control region,and mixing control region of the ORR process,and accurately obtain the relevant kinetic *** work offers an effective strategy and a reliable theoretical basis for the engineering of first-class ORR electrocatalysts with fast electronic/mass transport.

关键词： Oxygen reduction catalyst Metal-organic frameworks Carbon nanofiber Hierarchically porous structure Diffusion kinetics Zn-air battery

Rational Design of Electrocatalyst with Abundant Co/MoN Heterogeneous Domains for Accelerating Hydrogen Evolution Reaction

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2022年第7期41卷 40-45页

作者： Yu Qiu Jinzheng Liu Mengxiao Sun Jifa Yang Junzhe Liu Xiaoyan zhang Xuejun Liu lixue zhang College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

Developing efficient and durable electrocatalysts for water splitting, which has long been regarded as one of the most promising patterns to produce green hydrogen, is of great significance but still challenging. Herein,ample Co/MoN heterogeneous domains/nitrogen-doped carbon(Co/MoN/NC) nanosheet arrays as high-performance hydrogen evolution reaction(HER) electrocatalyst via a typical nitriding-carbonization strategy are successfully prepared on nickel foam(NF), which exhibits a low overpotential of 29 m V at 10 m A cm, together with excellent durability at 20 m A cmfor 90 h in alkaline solution. Such excellent catalytic property for HER can be attributed to the generation of abundant Co/Mo N heterogeneous structures. Additionally, the high conductivity of Co/Mo N and NC also increases the charge transfer rate, further helping accelerate the reaction rate of HER. This work presents an efficient method for improving the catalytic hydrogen evolution activity in basic solution.

关键词： hydrogen evolution reaction water electrolysis Co/MoN heterogeneous domains

Nitrogen-doped Co_(3)O_(4) nanowires enable high-efficiency electrochemical oxidation of 5-hydroxymethylfurfural

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第1期33卷 385-389页

作者： Mengxiao Sun Yue Wang Chunsen Sun Yan Qi Jia Cheng Yumei Song lixue zhang College of Chemistry and Chemical Engineering State Key Laboratory of Bio-fibers and Eco-textilesQingdao UniversityQingdao 266071China Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals Institute of AnalysisGuangdong Academy of SciencesGuangzhou 510070China

Developing highly efficient and cost-effective catalysts for electrochemically oxidizing biomass-derived 5-hydroxymethylfurfural(HMF)into value-added 2,5-furandicarboxylic acid(FDCA)is of great ***,we report a controllable nitrogen doping strategy to significantly improve the catalytic activity of Co_(3)O_(4)nanowires for highly selective electro-oxidation of HMF into *** nitrogen doping leads to the generation of defects including nitrogen dopants and oxygen vacancies in Co_(3)O_(4)nanowires,which is conducive to the formation of catalytically active *** a result,the electro-oxidation potential for HMF is only 1.38 V(***)when the current density reaches 50 mA/cm^(2).More importantly,the conversion rate of HMF is as high as 99.5%,and the yield of FDCA is up to 96.4%.

关键词： Electrochemical oxidation HMF FDCA Co_(3)O_(4) Nitrogen doping

Strong metal–support interaction boosts the electrocatalytic hydrogen evolution capability of Ru nanoparticles supported on titanium nitride

在线全文

学校读者我要写书评

暂无评论

Carbon Energy 2024年第1期6卷 245-254页

作者： Xin Wang Xiaoli Yang Guangxian Pei Jifa Yang Junzhe Liu Fengwang Zhao Fayi Jin Wei Jiang Haoxi Ben lixue zhang College of Chemistry and Chemical Engineering Collaborative Innovation Center for Hydrogen Energy Key Materials and Technologies of Shandong ProvinceQingdao UniversityQingdaoShandongChina State Key Laboratory of Bio-fibers and Eco-Textiles Qingdao UniversityQingdaoShandongChina Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of ScienceQingdaoShandongChina

Ruthenium(Ru)has been regarded as one of the most promising alternatives to substitute Pt for catalyzing alkaline hydrogen evolution reaction(HER),owing to its inherent high activity and being the cheapest platinum-group ***,based on the idea of strong metal–support interaction(SMSI)regulation,Ru/TiN catalysts with different degrees of TiN overlayer over Ru nanoparticles were fabricated,which were applied to the alkaline electrolytic *** reveal that the TiN overlayer would gradually encapsulate the Ru nanoparticles and induce more electron transfer from Ru nanoparticles to TiN support by the Ru–N–Ti bond as the SMSI degree *** study shows that the exposed Ru–TiN interfaces greatly promote the H_(2) desorption ***,the Ru/TiN-300 with a moderate SMSI degree exhibits excellent HER performance,with an overpotential of 38 mV at 10 mA cm^(−2).Also,due to the encapsulation role of TiN overlayer on Ru nanoparticles,it displays super long-term stability with a very slight potential change after 24 *** study provides a deep insight into the influence of the SMSI effect between Ru and TiN on HER and offers a novel approach for preparing efficient and stable HER electrocatalysts through SMSI engineering.

关键词： electronic structure hydrogen evolution reaction ruthenium strong metal-support interaction titanium nitride

Studies on Amidothiosemicarbazides and Related Hcterocyclic Derivatives ( XIII) --Synthetic Studies on 2-(3-Pyridyl)-5-Arylamino- 1,3, 4-Thiadiazoles and Oxadiazoles

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

Chemical Research in Chinese Universities 1989年第2期5卷 147-157页

作者： zhang lixue (Department of Chemistry, Wenzhou Teacher’ s College, Wenzhou)zhang Ziyi (Department of Chemistry, Lanzhou University, Lanzhou)

By ring-closure of 1-nicotinyl-4-arylthiosemicarbazides under the catalysis of concentrated sulfuric acid or mercuric acetate, a series of 2-(3-pyridyl)-5-arylarnino-1,3,4-thiadiazoles and 2-(3-pyridyl)-5-ary-lamino-1,3,4-oxadiazoles were synthesized, respectively. All the products were subjected to testing of biological activity. Furthermore, the IR, 1H NMR and MS spectral properties of these new compounds were studied in details and some significant conclusions were drawn.

关键词： 1,3,4-Thiadiazoles ,1,3,4-Oxadiazoles Synthesis

Structural Chemistry in Energy Relevant-Catalysis Reaction

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2022年第7期41卷 1-1页

作者： Xinlong Tian Jiayuan Li lixue zhang Yu Chen State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikou 570228China Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'an 710072China College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China School of Materials Science and Engineering Shaanxi Normal UniversityXi'an 710062China

Challenges are faced for rapid economic and social development including the global energy shortage, diversification in energy and chemical raw materials, and ecological environmental protection. The development of re... 详细信息

关键词： shortage protection ecological

在线全文

学校读者我要写书评

暂无评论

平流层飞艇环境适应性评价模型

航空学报 2013年第4期34卷 719-726页

作者：张礼学王中伟国防科学技术大学航天与材料工程学院湖南长沙410073

阐述了平流层特别是20km高度左右平流层的环境特点,分析了各种环境因素对长期在此空域中驻留飞行的平流层飞艇性能的影响,在此基础上,建立了平流层飞艇环境适应性评价指标体系。并针对其各评价指标的物理意义不同且数量级相差较大的特... 详细信息

阐述了平流层特别是20km高度左右平流层的环境特点,分析了各种环境因素对长期在此空域中驻留飞行的平流层飞艇性能的影响,在此基础上,建立了平流层飞艇环境适应性评价指标体系。并针对其各评价指标的物理意义不同且数量级相差较大的特点提出了基于物理规划和层次分析法相结合的综合评价模型。算例和分析结论表明:抗风速度余量和产生消耗能量比在平流层飞艇对其飞行环境的适应能力评价中占有重要比重,应成为飞艇总体方案设计和论证时的重点关注指标。

关键词：平流层飞艇环境适应性物理规划层次分析法评价模型概念设计

InAs/GaSb超晶格探测器台面工艺研究（英文）

在线全文

学校读者我要写书评

暂无评论

红外与激光工程 2015年第3期44卷 951-954页

作者：姚官生张利学张向锋张亮张磊中国空空导弹研究院河南洛阳471009 红外探测器技术航空科技重点实验室河南洛阳471009 西北工业大学陕西西安710072

InAs/GaSb SLs探测器台面刻蚀常用的工艺有干法刻蚀和湿法刻蚀。研究了三种等离子刻蚀气体(Cl2基,Ar基和CH4基)对超晶格的刻蚀效果,SEM结果表明,CH4基组分能够得到更加平整的表面形貌和更少的腐蚀坑;之后采用湿法腐蚀工艺,用于消除干法... 详细信息

InAs/GaSb SLs探测器台面刻蚀常用的工艺有干法刻蚀和湿法刻蚀。研究了三种等离子刻蚀气体(Cl2基,Ar基和CH4基)对超晶格的刻蚀效果,SEM结果表明,CH4基组分能够得到更加平整的表面形貌和更少的腐蚀坑;之后采用湿法腐蚀工艺,用于消除干法刻蚀带来的刻蚀损伤,分别研究了酒石酸系和磷酸系两种腐蚀溶液的去损伤效果,结果表明,磷酸系腐蚀液的去损伤效果更好,且腐蚀速率更加稳定。采用优化的台面工艺制备了InAs/GaSb SLs探测器,其I-V特性曲线表明二极管具有较低的暗电流,其77 K时动态阻抗R0A=1.98×104Ωcm2。

关键词： InAs/GaSb超晶格干法刻蚀湿法腐蚀台面

基于主成分分析法的铁路侧式站房雨棚工程量估测研究

在线全文

学校读者我要写书评

暂无评论

铁道标准设计 2012年第5期32卷 157-160页

作者：张立学铁道第三勘察设计院集团有限公司天津300142

针对铁路客站雨棚结构体系工程用量影响因素繁多复杂的问题,应用主成分分析法,分析得到影响其工程用量的主控因素,并作为BP神经网络的输入向量。然后,选取侧式站房钢桁架雨棚结构体系为估测研究对象,建立了基于主成分分析结果的BP神经... 详细信息

针对铁路客站雨棚结构体系工程用量影响因素繁多复杂的问题,应用主成分分析法,分析得到影响其工程用量的主控因素,并作为BP神经网络的输入向量。然后,选取侧式站房钢桁架雨棚结构体系为估测研究对象,建立了基于主成分分析结果的BP神经网络估测模型。通过采用收集到的雨棚结构工程造价数据对估测模型进行验证,结果表明:应用主成分分析结果所建立的神经网络估测模型精度比较理想,误差符合要求,具有一定的实用价值。

关键词：哈大客运专线铁路站房工程量估测雨棚主成分分析 BP神经网络