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Atomic Cu Sites Engineering Enables Efficient CO_(2)Electroreduction to Methane with High CH_(4)/C_(2)H_(4)Ratio

Nano-Micro Letters 2023年第12期15卷 361-375页

作者： Minhan Li fangzhou Zhang Min Kuang Yuanyuan Ma Ting Liao Ziqi Sun Wei Luo wan Jiang Jianping Yang Institute of Functional Materials State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China College of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001People’s Republic of China School of Mechanical Medical and Process EngineeringSchool of Chemistry and PhysicsQueensland University of Technology2 George StreetBrisbaneQLD 4001Australia

Electrochemical reduction of CO_(2)into high-value hydrocarbons and alcohols by using Cu-based catalysts is a promising and attractive technology for CO_(2)capture and utilization,resulting from their high catalytic activity and *** mobility and accessibility of active sites in Cubased catalysts significantly hinder the development of efficient Cu-based catalysts for CO_(2)electrochemical reduction reaction(CO_(2)RR).Herein,a facile and effective strategy is developed to engineer accessible and structural stable Cu sites by incorporating single atomic Cu into the nitrogen cavities of the host graphitic carbon nitride(g-C_(3)N_(4))as the active sites for CO_(2)-to-CH_(4)conversion in CO_(2)*** regulating the coordination and density of Cu sites in g-C_(3)N_(4),an optimal catalyst corresponding to a one Cu atom in one nitrogen cavity reaches the highest CH_(4)faraday efficiency of 49.04%and produces the products with a high CH_(4)/C_(2)H_(4)ratio over *** work provides the first experimental study on g-C_(3)N_(4)-supported single Cu atom catalyst for efficient CH_(4)production from CO_(2)RR and suggests a principle in designing highly stable and selective high-efficiency Cu-based catalysts for CO_(2)RR by engineering Cu active sites in 2D materials with porous crystal structures.

关键词： CO_(2)RR Cu single-atom catalyst g-C_(3)N_(4) Methane CH_(4)/C_(2)H_(4)ratio

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基于CT测量的旋顶角、旋顶距在全髋关节置换术前股骨假体个体化选择中的应用

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中华解剖与临床杂志 2024年第5期29卷 322-330页

作者：万超廉伟董圣杰张逸凌王诗军张树栋孙涛赵宇驰烟台市烟台山医院关节外科烟台264003 烟台市烟台山医院影像科烟台264003 北京长木谷医疗科技股份有限公司北京100190 烟台市烟台山医院创伤骨科烟台264003

目的探讨基于CT测量的旋顶角、旋顶距与股骨颈干角(FNSA)、股骨偏心距(FO)之间的关系,以及旋顶角、旋顶距在全髋关节置换术(THA)术前不同FNSA股骨假体选择中的应用价值。方法横断面研究。纳入2022年7—12月烟台市烟台山医院关节外科收... 详细信息

目的探讨基于CT测量的旋顶角、旋顶距与股骨颈干角(FNSA)、股骨偏心距(FO)之间的关系,以及旋顶角、旋顶距在全髋关节置换术(THA)术前不同FNSA股骨假体选择中的应用价值。方法横断面研究。纳入2022年7—12月烟台市烟台山医院关节外科收治的单侧髋关节或单侧膝关节病变患者255例,年龄22~86(65.1±9.0)岁,其中男85例、女170例,≤65岁114例、>65岁141例。患者术前均行全骨盆、双侧股骨全长CT扫描,将扫描后CT原始数据导入Mimics 19.0软件,重建健侧股骨三维模型,应用3-matic Research 11.0软件在健侧股骨三维模型上定位股骨头旋转中心,测量股骨头直径(FHD)、股骨颈长度(FNL)、FNSA、FO、股骨颈前倾角(FNAA)、旋顶距、旋顶角等参数。采用人工智能辅助THA三维规划系统AIJOINT V1.***.0.0软件,依据CT三维测量数据对患者进行术前规划、设计,个性化选择不同颈干角人工股骨柄并模拟手术。观察指标:(1)在健侧股骨三维模型中,观察FHD、FNL、FNSA、FO、FNAA、旋顶角和旋顶距在不同性别和年龄间的差异,以及FNSA、FO、旋顶距、旋顶角之间的相关性。(2)患者按术前规划、模拟手术选择的股骨柄类型分为135°Corail组和125°Corail组,比较2组间性别、年龄、身高、体质量、体质量指数(BMI)等基线资料,以及FHD、FNL、FNSA、FO、FNAA、旋顶角和旋顶距之间的差异。(3)采用受试者操作特征(ROC)曲线分析旋顶角、旋顶距对THA股骨假体类型的选择效能。结果(1)255侧成人健侧股骨三维模型测量结果显示,FHD为(46.15±3.38)mm,FNL为(47.37±4.54)mm,FNSA为123.21°±5.61°,FO为(39.37±4.76)mm,FNAA为10.52°±7.46°,旋顶角为14.19°±5.29°,旋顶距为(11.69±4.54)mm。女性FHD、FNL、FO、旋顶角和旋顶距均小于男性,FNSA、FNAA均大于男性,差异均有统计学意义(P值均65岁者FO、旋顶角和旋顶距均大于≤65岁者,差异均有统计学意义(P值均0.05)。Pearson相关分析显示,旋顶角与旋顶距之间存在极强的正相关(r=0.968,P12.60°或旋顶距>10.54 mm,选择125°Corail股骨柄,反之则选择135°Corail股骨柄。结论旋顶角、旋顶距与FNSA、FO存在相关性,对不同FNSA股骨假体类型选择的效能均较高,可作为THA术前股骨假体个性化选择的参数。

关键词：关节成形术,置换,髋旋顶角旋顶距体层摄影术,螺旋计算机三维测量假体选择

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Toward stable photoelectrochemical water splitting using NiOOH coated hierarchical nitrogen-doped ZnO-Si nanowires photoanodes

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Journal of Energy Chemistry 2022年第8期31卷 45-55,I0002页

作者： Indrajit V.Bagal Maheswari Arunachalam Ameer Abdullah Aadil Waseem Mandar AKulkarni Soon Hyung Kang Sang-wan Ryu Department of Physics Chonnam National UniversityGwangju 61186Republic of Korea Department of Chemistry Education Chonnam National UniversityGwangju 61186Republic of Korea Optoelectronic Convergence Research Center Chonnam National UniversityGwangju 61186Republic of Korea

Photoelectrochemical(PEC)water splitting is regarded as the most promising method to generate“green hydrogen”,and zinc oxide(ZnO)has been identified as one of the promising candidates for PEC water splitting owing to its straddling band alignment with the water redox ***,its PEC performance is limited due to its wide bandgap and anticipated by photocorrosion in an aqueous *** this work,we present strategic improvements in the PEC water splitting performance of ZnO nanowires(NWs)by nitrogen(N)-doping along with photostability by the core–shell deposition of a NiOOH *** crystalline hierarchical ZnO NWs were fabricated on Si NWs(ZnO-Si HNWs)using a metal organic chemical vapor deposition *** NWs were then N-doped by annealing in an NH_(3) *** N-doped ZnO-Si HNWs(N:ZnO-Si HNWs)showed enhanced visible light absorption,and suppressed recombination of the photogenerated *** compared to ZnO-Si HNWs(0.045 m A cm^(-2) at 1.23 V vs RHE),the N:ZnO-Si HNWs(0.34 m A cm^(-2) at 1.23 V vs RHE)annealed in NH^(3) ambient for 3 h at 600℃showed 7.5-fold enhancement in the photocurrent ***-deposited N:ZnO-Si HNW photoanodes with a photostability of 82.21%over 20000 s showed 10.69-fold higher photocurrent density(0.48 m A cm^(-2) at 1.23 V vs RHE)than ZnO-Si HNWs.

关键词： Hierarchical NWs MOCVD NiOOH cocatalyst N-doping Photoelectrochemical water splitting

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Chelation of lithium ion with crown ether for eliminating adverse effects caused by Li-TFSI/tBP doping system in Spiro-OMeTAD

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Journal of Energy Chemistry 2022年第11期31卷 489-496,I0013页

作者： Zhongquan wan Hui Lu Jinyu Yang Yunpeng Zhang fangyan Lin Jianxing Xia Xiaojun Yao Junsheng Luo Chunyang Jia State Key Laboratory of Electronic Thin Films and Integrated Devices School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen 518110GuangdongChina State Key Laboratory of Applied Organic Chemistry Lanzhou UniversityLanzhou 730000GansuChina

Lithium bis(trifluoromethanesulfonyl)imide(Li-TFSI)/4-tert-butylpyridine(tBP)is a classic doping system for the hole transport material Spiro-OMeTAD in typical n-i-p structure perovskite solar cells(PSCs),but this system will cause many problems such as high hygroscopicity,Li+migration,pinholes and so on,which hinder PSC from maintaining high efficiency and stability for *** this work,an effective strategy is demonstrated to improve the performance and stability of PSC by replacing t BP with *** chelation of 12-crown-4 with Li+not only improves the doping effect of Li-TFSI,but also perfectly solves the problems caused by the Li-TFSI/tBP *** PSC based on this strategy achieved a champion power conversion efficiency(PCE)over 21%,which is significantly better than the pristine device(19.37%).More importantly,the without encapsulated device based on Li-TFSI/12-crown-4 still maintains 87%of the initial PCE even after 60 days exposure in air,while the pristine device only maintains 22%of the initial PCE under the same aging *** strategy paves a novel way for constructing efficient and stable PSCs.

关键词： Perovskite solar cells Spiro-OMeTAD Li-TFSI dopant 12-Crown-4 Chelation

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Electric field controlled superlubricity of fullerene-based host–guest assembly

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Nano Research 2023年第1期16卷 583-588页

作者： Shanchao Tan Hongyu Shi Xin Du Kunpeng wang Haijun Xu Junhua wan Ke Deng Qingdao Zeng Yuhong Liu State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology(NCNST)Beijing 100190China College of Chemical Engineering Jiangsu Key Lab of Biomass-based Green Fuels and ChemicalsNanjing Forestry UniversityNanjing 210037China Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education Hangzhou Normal UniversityHangzhou 310012China Center of Materials Science and Optoelectonics Engineering University of Chinese Academy of SciencesBeijing 100049China

Controlling friction by the electric field is a promising way to improve the tribological performance of a variety of movable mechanical *** this work,the assembly structure and microscale superlubricity of a host–guest assembly are effectively controlled by the electric *** the help of the scanning tunneling microscopy(STM)technique,the host–guest assembly structures constructed by the co-assembly of fullerene derivative(Fluorene-C60)with macrocycles(4B2A and 3B2A)are explicitly *** with density functional theory(DFT),the distinct different assembly behaviors of fullerene derivatives are revealed at different probe biases,which is attributed to the molecular polarity of the fullerene *** the control on the adsorption behavior,the friction coefficient of host–guest assembly is demonstrated to be controllable in the electric field by using atomic force microscopy(AFM).At positive probe bias,the friction coefficient of the host–guest assembly is significantly reduced and achieves superlubricity(μmin=0.0049).The efforts not only help us gain insight into the host–guest assembly mechanism controlled by the electric field,but also promote the further application of fullerene in micro-electro-mechanical systems(MEMS).

关键词： superlubricity electric field friction control fullerene derivative host-guest assembly

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Solid-State Hydrogen Storage Properties of Ti-V-Nb-Cr High-Entropy Alloys and the Associated Effects of Transitional Metals(M=Mn,Fe,Ni)

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Acta Metallurgica Sinica(English Letters) 2023年第7期36卷 1113-1122页

作者： Bo Cheng Yunkai Li Xiaoxi Li Huibin Ke Liang wang Tangqing Cao Di wan Benpeng wang Yunfei Xue Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing314019China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing100081China Department of Mechanical and Industrial Engineering Norwegian University of Science and Technology7491TrondheimNorway

Recently,high-entropy alloys(HEAs)designed by the concepts of unique entropy-stabilized mechanisms,started to attract widespread interests for their hydrogen storage *** with body-centered cubic(BCC)structures present a high potential for hydrogen storage due to the high hydrogen-to-metal ratio(up to H/M=2)and vastness of *** many studies reported rapid absorption kinetics,the investigation of hydrogen desorption is missing,especially in BCC *** have investigated the crystal structure,microstructure and hydrogen storage performance of a series of HEAs in the Ti-V-Nb-Cr *** types of TiVCrNb HEAs(Ti_(4)V_(3)NbCr_(2),Ti_(3)V_(3)Nb2Cr_(2),Ti_(2)V_(3)Nb_(3)Cr_(2))with close atomic radii and different valence electron concentrations(VECs)were designed with single BCC phase by CALPHAD *** three alloys with fast hydrogen absorption kinetics reach the H/M ratio up to ***,Ti_(4)V_(3)NbCr_(2)alloy shows the hydrogen storage capacity of 3.7 wt%,higher than other HEAs ever *** dehydrogenation activation energy of HEAs’hydride has been proved to decrease with decreasing VEC,which may be due to the weakening of alloy atom and H ***,Ti_(4)V_(3)NbCr_(2)M(M=Mn,Fe,Ni)alloys were also synthesized to destabilize *** addition of Mn,Fe and Ni lead to precipitation of Laves phase,however,the kinetics did not improve further because of their own excellent hydrogen *** increasing the content of Laves phase,there appear more pathways for hydrogen desorption so that the hydrides are more easily dissociated,which may provide new insights into how to achieve hydrogen desorption in BCC HEAs at room temperature.

关键词： High-entropy alloy Hydrogen storage CALPHAD Hydride stability Hydrogen sorption kinetics

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The mortise and tenon structure enabling lamellar carbon composites of ultra-high bending strength

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Journal of Materials Science & Technology 2023年第2期133卷 249-258页

作者： Zhaojun Li Kunpeng Lin Hailiang fang Hui Yu Junzhuo wang Yimin Miao Lianjun wang Jianlin Li wan Jiang State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China School of Materials and Chemical Engineering Pingxiang UniversityPingxiang 337055China

Carbon materials are important but find little application in bending components due to their unsatisfy-ing bending strength(300-500 MPa).To fabricate carbon composites of high bending strength is a tough task,even using carbon fibers(CFs)structures as *** we report lamellar carbon com-posites of ultra-high bending strength(>1.2 GPa)produced from CFs cloths coated with nano-diamond(ND)particles by spark plasma sintering(SPS).When NDs are sandwiched between CFs cloths,some ND particles penetrate into interstices between *** the sintering,the ND particles are transformed into graphite onions;this transformation is associated with an active state of carbon atoms participating in the *** a result,the carbon onions strongly bond the CFs together,helping consolidate the com-pacts into strong lamellar carbon composite *** produced graphite onions from the NDs located at crossings of CFs tows form a robust mortise and tenon structure,which helps the bending strength of the lamellar composite from the compact of 40 wt.%NDs exceed 1.2 *** as-prepared compos-ite possesses the highest specific bending strength of all current high temperature structural materials reported so *** work may pave a new way for high performance carbon materials.

关键词： Carbon fibers(CFs) Diamond Carbon composite Strength

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Efficient recovery of aromatic compounds from the wastewater of styrene monomer and propylene oxide co-production plant via hypercrosslinked aryl-rich starch-β-cyclodextrin polymeric sorbent

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Chinese Journal of Chemical Engineering 2022年第9期35卷 150-160页

作者： Zhongwei Tan Xingguo Xu Yu wan Chengjun Kang Zhaoqiang Zhang Zhenxia Zhao fang Shen Kungang Chai Hongbing Ji School of Chemistry and Chemical Engineering Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification TechnologyGuangxi UniversityNanning 530004China Department of Chemical and Biomolecular Engineering National University of Singapore4 Engineering Drive 4Singapore 117585Singapore Fine Chemical Industry Research Institute School of ChemistrySun Yat-sen UniversityGuangzhou 510275China

Adsorptive recovery of valuable components from industrial wastewater is highly desirable for avoiding resource wastage but remains a ***,we develop an efficient continuous adsorption process for recovering aromatic compounds in wastewater from styrene monomer and propylene oxide coproduction(SMPO)*** on our insight into the potential of bio-based porous materials for adsorption application,starch-graft-polystyrene(SPS)and aryl-modifiedβ-cyclodextrin(ACD)were prepared,and novel hypercrosslinked porous polymers combined SPS with ACD(HSPS-ACDs)were synthesized through external crosslinking *** a binary-component system,the best-performing one HSPS-ACD(H)with high ACD content and large specific surface area possessed superior capacities for the representative aromatic compounds,acetophenone(AP,2.81 mmol·g^(-1))and 1-phenylethanol(1-PE,1.35 mmol·g^(-1))compared with the previously reported ***,the adsorption properties of aromatic compounds on HSPS-ACD(H)were investigated in batch *** practical application,continuous adsorption experiments were conducted in a HSPS-ACD(H)-packed fixed bed,where the target aromatic components in wastewater were effectively retained and further released by *** showing the reversible adsorption and efficient enrichment effect,the HSPS-ACD(H)-packed fixed bed also maintained great stability in multiple ***,quantum chemical calculations were performed to elucidate the potential mechanism of adsorption of AP and 1-PE onto HSPS-ACD(H).

关键词： Adsorption Wastewater treatment Aromatics Hypercrosslinked polymer β-cyclodextrin Starch

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面向科研创新的“数字信号处理”实验改革探索

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教育教学论坛 2024年第12期 99-102页

作者：韩素雅朱政宇郝万明郑州大学电气与信息工程学院河南郑州450001

培养创新人才是教育的重要任务,科研是培养创新人才的第一步。“数字信号处理”作为电子信息类的专业基础课程,理论性较强,实验教学是理论联系实际的重要环节。将教学实践与科学研究相结合,以科研创新为导向进行实验教学的改革探索。从... 详细信息

培养创新人才是教育的重要任务,科研是培养创新人才的第一步。“数字信号处理”作为电子信息类的专业基础课程,理论性较强,实验教学是理论联系实际的重要环节。将教学实践与科学研究相结合,以科研创新为导向进行实验教学的改革探索。从实验课程内容、教学形式、考核方式及实验报告四个方面实施改革方案,注重融入科研创新,拓宽学生的国际化视野,有效提高学生的独立创新和科研能力。

关键词：科研创新数字信号处理实验改革国际化视野

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A hollow tubular NiCo layacknered double hydroxide@Ag nanowire structure for high-power-density flexible aqueous Ni//Zn battery

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Journal of Energy Chemistry 2022年第7期31卷 593-603,I0015页

作者： Xiaoyang Xuan Min Qian Likun Pan Ting Lu Yang Gao Lu Han Lijia wan Yueping Niu Shangqing Gong School of Physics East China University of Science and TechnologyShanghai 200237China Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China

Flexible aqueous Ni//Zn batteries have attracted much attention as promising candidates for energy storage in the field of flexible ***,the Ni-based cathodes still face the challenges of poor conductivity,confined charge/mass transfer,and *** this work,we designed a hollow tubular structure consisting of a conductive silver nanowire (Ag NW) wrapped by active Ni Co layered double hydroxide (LDH),for enhancing the electrical conductivity,improving the charge/mass transfer kinetics,and facilitating the ion *** optimizing the contents of Ni,Co and Ag NW,the Ni_(4)Co LDH@Ag_(1.5)NW composite shows a maximum specific capacity of 115.83 m Ah g^(-1)at 0.1 A g^(-1)measured in a two-electrode ***,the flexible aqueous Ni//Zn battery assembled by Ni_(4)Co LDH@Ag_(1.5)NW interwoven with multi-walled carbon nanotube cathode and Zn foil anode realizes a high power density of 160μW cm^(-2)at the energy density of 23.14μWh cm^(-2),which is superior compared with those of oxide/hydroxide based devices and even higher than those of many carbon-based supercapacitors,showing its promising potentials for flexible energy storage applications.

关键词： NiCo layered double hydroxide Silver nanowire Hollow tubular morphology Flexible Ni//Zn battery

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