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A preliminary site selection system for underground hydrogen storage in salt caverns and its application in Pingdingshan,China

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Deep Underground Science and Engineering 2024年第1期3卷 117-128页

作者： Liangchao Huang Yanli Fang Zhengmeng Hou Yachen Xie Lin Wu Jiashun Luo qichen wang Yilin Guo Wei Sun Sino‐German Research Institute of Carbon Neutralization and Green Development Zhengzhou UniversityZhengzhouChina Institute of Subsurface Energy Systems Clausthal University of TechnologyClausthal ZellerfeldGermany Research Centre of Energy Storage Technologies Clausthal University of TechnologyGoslarGermany Sino‐German Energy Research Center Sichuan UniversityChengduChina State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhanChina Faculty of Land and Resources Engineering Kunming University of Science and TechnologyKunmingChina

Large‐scale underground hydrogen storage(UHS)provides a promising method for increasing the role of hydrogen in the process of carbon neutrality and energy *** all the existing storage deposits,salt caverns are recognized as ideal sites for pure hydrogen *** and optimization of site selection for hydrogen storage facilities in salt caverns have become significant *** this article,the software CiteSpace is used to analyze and filter hot topics in published *** on a detailed classification and analysis,a“four‐factor”model for the site selection of salt cavern hydrogen storage is proposed,encompassing the dynamic demands of hydrogen energy,geological,hydrological,and ground factors of salt ***,20 basic indicators for comprehensive suitability grading of the target site were screened using the analytic hierarchy process and expert survey methods were adopted,which provided a preliminary site selection system for salt cavern hydrogen ***,the developed system was applied for the evaluation of salt cavern hydrogen storage sites in the salt mines of Pingdingshan City,Henan Province,thereby confirming its rationality and *** research provides a feasible method and theoretical basis for the site selection of UHS in salt caverns in China.

关键词： analytic hierarchy process(AHP) evaluation index hydrogen storage salt cavern site selection

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刻蚀法制备高透过率防眩高铝玻璃

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表面技术 2024年第4期53卷 184-192页

作者：王其琛郝霞赵竞一王闻之段佳岐赵会峰李军葛姜宏海南大学海南省特种玻璃重点实验室海口570228 海南大学南海海洋资源利用国家重点实验室海口570228 海南海控特玻科技有限公司海南澄迈571924

目的采用刻蚀法制备了具有高透过率的高铝玻璃,分析刻蚀时间对玻璃表面形貌和性能的影响。方法将经过HF(2.3 mol/L)溶液酸洗10 min后的玻璃样品清洗烘干,然后放入H_(2)SO_(4)(0.1 mol/L)、HCl(0.4mol/L)、Na_(2)SiF_(6)(0.02mol/L)的混... 详细信息

目的采用刻蚀法制备了具有高透过率的高铝玻璃,分析刻蚀时间对玻璃表面形貌和性能的影响。方法将经过HF(2.3 mol/L)溶液酸洗10 min后的玻璃样品清洗烘干,然后放入H_(2)SO_(4)(0.1 mol/L)、HCl(0.4mol/L)、Na_(2)SiF_(6)(0.02mol/L)的混合溶液中进行不同时间的表面刻蚀处理,形成了超表面凹坑结构,这种结构使部分光线经过有限次数的反射和折射后成为透射光的一部分,这种凹坑结构也相当于在空气和玻璃之间增加了一个具有梯度折射率的介质层,从而减少反射率、增加透过率。通过扫描电镜(SEM)、原子力显微镜(AFM)、X射线能谱仪(EDS)、紫外可见近红外分光光度计等仪器,对刻蚀前后玻璃的表面进行分析研究。结果随着刻蚀时间的延长,蚀坑的直径逐渐增大,同时致密度也在逐渐增加直至相互融合,而坑深先增大后减小。可见光波长范围内的平均透过率先增加后降低,反射率先降低后增加,且透过率均大于玻璃原片,反射率均小于玻璃原片。刻蚀前后玻璃成分基本不变,铅笔硬度达到9H。结论刻蚀后,在玻璃表面形成超表面凹坑结构,当刻蚀时间为20 min时,蚀坑直径达到2.5~5.0μm,深度达到927.2 nm左右,平均透过率达到95.95%,平均反射率达到4.01%。

关键词：化学刻蚀透过率高铝玻璃超表面凹坑结构玻璃表面

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Facile synthesis of FeCo@NC core-shell nanospheres supported on graphene as an efficient bifunctional oxygen electrocatalyst

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Nano Research 2017年第7期10卷 2332-2343页

作者： Nan Wu Yongpeng Lei qichen wang Bing wang Cheng Han Yingde wang Science and Technology on Advanced Ceramic Fibers and Composites Laboratory National University of Defense Technology Chongsha 410073 China College of Basic Education National University of Defense Technology Changsha 410073 China College of Materials Science and Engineering Central South University of Forestry and Technology Changsha 410004 China College of Materials Science and Engineering Wuhan Textile University Wuhan 430074 China

Electrocatalytic conversion of oxygen holds great potential for clean energy technologies, including water electrolysis, regenerative fuel cells, and rechargeable metal-air batteries. The development of highly efficient and inexpensive oxygen electrocatalysts as replacements for precious metal-based catalysts is vitally important for large-scale practical application in the future. A bifunctional oxygen electrocatalyst based on FeCo nanoparticles/N-doped carbon core-shell spheres supported on N-doped graphene sheets was prepared via one-step pyrolysis of graphitic carbon nitride and acetylacetonates. The optimized product exhibited an oxygen electrode activity of 0.87 V and excellent durability. The remarkable performance is mainly attributed to the synergetic effect arising from the FeCo nanoparticles and N-doped carbon shell. This study introduces an inexpensive and simple way to develop highly active bifunctional oxygen electrocatalysts.

关键词： iron-cobalt alloy carbon nitride nitrogen-doped carbon core-shell structure bifunctional oxygenelectrocatalyst

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MOCVD技术在MgO基底沉积YBCO薄膜缓冲层LaMnO_(3)研究

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低温与超导 2024年第2期52卷 22-31页

作者：陈建华王其琛夏钰东赵睿鹏欧凯王维陶伯万西南交通大学物理科学与技术学院成都610031 松山湖材料实验室东莞523808 电子科技大学电子薄膜与集成器件国家重点实验室成都611731

在MgO基底使用金属有机化学气相沉积(MOCVD)法直接制备YBa_(2)Cu_(3)O_(7-δ)会出现MgO和YBCO晶格失配较大的问题,从而影响薄膜的生长和超导器件的制备。缓冲层的引入是一种可靠的解决手段。本文基于MOCVD技术,在MgO基底上生长LaMnO_(3... 详细信息

在MgO基底使用金属有机化学气相沉积(MOCVD)法直接制备YBa_(2)Cu_(3)O_(7-δ)会出现MgO和YBCO晶格失配较大的问题,从而影响薄膜的生长和超导器件的制备。缓冲层的引入是一种可靠的解决手段。本文基于MOCVD技术,在MgO基底上生长LaMnO_(3)缓冲层,用以解决YBCO薄膜混合生长模式的问题,并通过改变MOCVD系统的氧气流量和沉积温度等沉积参数,采用如XRD,SEM,AFM等多种分析测试方法研究LMO缓冲层的结构取向和表面形貌。结果表明:当沉积温度为800℃,氧气流量为1000 sccm时,所制备的LMO缓冲层的结构取向最佳,缓冲层上生长的YBCO薄膜Ф扫描曲线出现四个相距90°的独立尖峰,YBCO在LMO缓冲层上只有一种生长方向,LMO缓冲层能够解决YBCO在MgO衬底上混合生长模式的问题,从而提高YBCO薄膜质量和性能。

关键词： MOCVD YBCO LaMnO_(3) 缓冲层

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Na_(2)O-CaO-SiO_(2)平板玻璃减反射功能化研究

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硅酸盐通报 2024年第4期43卷 1366-1373页

作者：郝霞王其琛符有杰李军葛赵会峰姜宏王卓海南海控特玻科技有限公司澄迈571924 海南大学海南省特种玻璃重点实验室海口570100 山东轻工职业学院淄博255000

随着光伏产业的高速发展,与之配套使用的减反射玻璃重新进入了研究者们的视野。本文采用湿化学二步刻蚀法制备了具有减反射性能的Na_(2)O-CaO-SiO_(2)平板玻璃,采用分光光度计、扫描电子显微镜、原子力显微镜和X射线能谱仪等测试样品的... 详细信息

随着光伏产业的高速发展,与之配套使用的减反射玻璃重新进入了研究者们的视野。本文采用湿化学二步刻蚀法制备了具有减反射性能的Na_(2)O-CaO-SiO_(2)平板玻璃,采用分光光度计、扫描电子显微镜、原子力显微镜和X射线能谱仪等测试样品的透过率、表面形貌和断面膜层厚度、表面化学成分、耐酸性和硬度,研究了反应温度和反应时间、玻璃膜层结构与透过率的关系。通过使用弱碱性的混合盐溶液对Na_(2)O-CaO-SiO_(2)玻璃表面进行化学刻蚀,使玻璃表面Si—O键断裂,在玻璃表面形成纳米膜层结构,当膜层厚度达到一定厚度时,一定波长的光在玻璃表面发生相消干涉,透过率最高可达到97.8%,刻蚀前后玻璃成分基本无变化,铅笔硬度达到3H。

关键词：减反射玻璃透过率 Na_(2)O-CaO-SiO_(2)平板玻璃湿化学二步刻蚀法表面微裂纹纳米孔

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N-doped defective carbon with trace Co for efficient rechargeable liquid electrolyte-/all-solid-state Zn-air batteries

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Science Bulletin 2018年第9期63卷 548-555页

作者： Zhiyan Chen qichen wang Xiaobin Zhang Yongpeng Lei Wei Hu Yao Luo Yaobing wang College of Materials Science and Engineering Central South University of Forestry and Technology State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University Center for Nano Materials and Technology Japan Advanced Institute of Science and Technology School of Aeronautics and Astronautics & Science and Technology on High Strength Structural Materials Laboratory Central South University College of Basic Education National University of Defense Technology Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Simple synthesis of multifunctional electrocatalysts with plentiful active sites from earth-abundant materials is especially fascinating. Here, N-doped defective carbon with trace Co （1.5 wt%） was prepared via a scalable one pot solid pyrolysis process. The sample exhibits efficient bifunctional OER/ORR activiW in alkaline, mainly ascribed to the unique micro-mesoporous structure （1-3 nm）, high population of graphitic-N doping （up to 49.0%）, abundant defects and the encapsulated Co nanoparticles with graphitized carbon. The according rechargeahle liquid Zn-air batteries showed excellent performance （maximum power density of 154.0 mWcm-2： energy density of 773Wh kg -1 at 5 mAcm 2 and charging-discharging cycling stability over 100 cycles）. As a proof-of-concept, the flexible, rechargeable all-solid-state Zn-air batteries were constructed, and displayed a maximum power density as high as 45.9 mW cm 2 among the top level of those reported previously.

关键词： Defect Oxygen electrocatalysts Rechargeable all-solid-state batteries

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Trimetallic oxyhydroxides as active sites for large-current-density alkaline oxygen evolution and overall water splitting

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Journal of Materials Science & Technology 2022年第15期110卷 128-135页

作者： Lei Chen Yunpeng wang Xin Zhao Yuchao wang Qian Li qichen wang Yougen Tang Yongpeng Lei State Key Laboratory of Powder Metallurgy Hunan Key Laboratory of Two-Dimensional MaterialsCentral South UniversityChangsha 410083China Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Physics and Electronics Hunan Key Laboratory for Super-micro structure and Ultrafast ProcessCentral South UniversityChangsha 410083China

Earth-abundant electrocatalysts for large-current-density water splitting under alkaline condition are *** evolution reaction,which is a bottleneck of the overall water splitting,faces the problems of complicated reconstruction and deficiency in rational design of active ***,we report a series of transition metal chalcogenides for alkaline *** them,FeCoNi(S)displayed a low overpotential of 293 m V to deliver a current density of 500 m A cm^(-2),which is in the top level of non-precious metal based OER electrocatalysts.A combination of(ex)in situ characterizations and DFT calculation shows that Ni(Fe,Co)trimetallic oxyhydroxides were the active sites for highly-efficient ***,for FeCoNi(S),when used as a bifunctional catalyst for water splitting,it only required a cell voltage of 1.84 V to deliver~500 m A cm^(-2) with extraordinary long-term stability over 2000 *** work provides the comprehension of high-efficiency,robust catalysts for OER and overall water splitting at large current densities in alkaline media.

关键词： Oxygen evolution Active sites Surface reconstruction Large current density Overall water splitting

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Oxygen-rich carbon-nitrogen quantum dots as cocatalysts for enhanced photocatalytic H2 production activity of TiO2 nanofibers

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Progress in Natural Science:Materials International 2017年第3期27卷 333-337页

作者： Zhiyan Chen Yishang Wu qichen wang Zhiyong wang Lihua He Yongpeng Lei Zhongmin wang School of Materials Science and Engineering Central South University of Forestry and Technology AVIC Beijing Institute of Aeronautical Materials College of Basic Education National University of Defense Technology School of Aeronautics and Astronautics Central South University Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology

We developed an one-step hydrothermal method to synthesize carbon-nitrogen quantum dots(CNQDs) with oxygen-rich functional *** sample was characterized by TEM,AFM,FT-IR,XPS,UV-vis absorption and PL *** 0/C and N/C atomic ratio of typical CNQDs with diameters of 3-6 nm are ca.0.4 and 0.2,*** noble metal cocatalyst,the photocatalytic H2production rate of CNQDs/TiO2nanofibers(NFs)(112.4 μmol h-1g-1) is 1.8 times higher than that of *** good absorption of light contributes to the enhanced photocatalytic *** CNQDs could be promising in biomedical imaging,optical data recording storage and photo/electrocatalysis,etc.

关键词： Photocatalytic H2 production TiO2 Nanofibers Quantum dots

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Microstructure Evolution of Heat‑Affected Zone in Submerged Arc Welding and Laser Hybrid Welding of 690 MPa High Strength Steel and its Relationship with Ductile–Brittle Transition Temperature

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Acta Metallurgica Sinica(English Letters) 2023年第4期36卷 623-636页

作者： Xuelin wang Wenjuan Su Zhenjia Xie Xiucheng Li Wenhao Zhou Chengjia Shang qichen wang Jian Bai Lianquan Wu Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China Guangdong Laboratory for Materials Science and Technology(Yangjiang Advanced Alloys Laboratory) Yangjiang BranchYangjiang 529500China Xiangtan Iron and Steel Co. Ltd of Hunan ValinXiangtan 411101China CIMC Raffles Offshore Limited Longkou 265700China CIMC Offshore Engineering Institute Limited Yantai 264670China Yangjiang Yichuan Metal Technology Co. LtdYangjiang 529533China

The comparative study of submerged arc welding(SAW)and laser hybrid welding(LHW)was carried out for a 690 MPa high strength steel with thickness of 20 *** and ductile–brittle transition temperature(DBTT)evolution in welded zone were elucidated from the aspect of crystallographic structure,particularly,digitization and visualization of 24 *** impact toughness of each micro zone in LHW joint is better than that of SAW,in which the DBTT of equivalent fusion line and heat-affected zone(HAZ)can reach−70 and−80℃,while that of SAW is only−50℃.LHW technology induces narrowing of the HAZ and refining of the microstructure obtained in weld metal and ***,the austenite grain size and transformation driving force in the coarse grained heat-affected zone(CGHAZ)are reduced and increased,*** makes variant selection mechanism occurring in CGHAZ of LHW dominate by close-packed plane grouping,which promotes lath bainite formation with high density of high angle grain boundary,especially block boundary dominated by V1/V2 *** for SAW,the lower transformation driving force inferred from the large amount of retained austenite in CGHAZ induces Bain grouping of variants,and thus triggers the brittle crack propagating straightly in granular bainite,resulting in lower impact toughness and higher DBTT.

关键词： High strength steel Welding Microstructure Variant selection Ductile-brittle transition temperature

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Atomic scale investigation of FCC→HCP reverse phase transformation in face-centered cubic zirconium

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Journal of Materials Science & Technology 2023年第6期137卷 8-13页

作者： Wenbin Guo Fuzhou Han Geping Li Yingdong Zhang Muhammad Ali Jie Ren qichen wang Fusen Yuan School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Mechanism of FCC→HCP reverse phase transformation in face-centered cubic zirconium(FCC-Zr)along with a concomitant 70.5°rotation ofα-Zr matrix were investigated in zircaloy-4(Zr-4)cladding tube by using transmission electron microscopy(TEM).Results showed that the interaction among a secondary phase particle(SPP)and three FCC-Zr grains resulted in the formation of cross stacking faults in SPP and exerted a drag force on minor axis of the adjacent FCC-Zr ***,when the shear stress along[112]_(FCC-Zr)direction was large enough to initiate the emission of 1/6[112]Shockley partial dislocation on every other(111)_(FCC-Zr)close-packed plane,the stacking sequence would change from ABC ABCA to AB ABABA viz.(0001)planes of the daughter HCP ***,FCC→HCP reverse phase transformation in FCC-Zr was presented.

关键词： Zircaloy-4 Reverse phase transformation Fcc-Zr phase Interaction

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