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Chinese Chemical Letters 2021年第11期32卷 3591-3595页

作者： xuyun gao Bo Li Xuzhuo Sun Baofan Wu Yanping Hu Zhichao Ning Jun Li Ning Wang College of Chemistry and Chemical Engineering Henan University of TechnologyZhengzhou 450001China Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry&Materials ScienceNorthwest UniversityXi'an 710069China

Crystalline engineering and heterostructure have attracted much attention as effective strategies to improve the electrocatalytic activity for hydrogen evolution reaction(HER).In this study,a new heterostructure catalyst(Ru/RuS_(2)@N-rGO)with low crystallinity was fabricated by a simple and low-temperature method for HER in alkaline solution,applying the Na_(2)SO_(4)as S source and polypyrrole as N *** through the controllable crystalline engineering and composition ratio of Ru and RuS_(2),the Ru/RuS_(2)@N-rGO heterocatalyst at the calcining 500°C revealed highly efficient HER activity with overpotential 18 mV at a current density 10 mA/cm^(2)and remarkable stability for 24 h in 1.0 mol/L *** work provides a facile and effective method in designing advanced electrocatalysts for HER in the alkaline electrolytes by synergistically structural and component modulations.

关键词： Low crystallinity Ru/RuS_(2)heterostructure Graphene Electrocatalytic hydrogen evolution Alkaline solution

Synthesis, structure and electrocatalytic H2-evoluting activity of a dinickel model complex related to the active site of [NiFe]-hydrogenases

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Chinese Chemical Letters 2020年第9期31卷 2483-2486页

作者： Dengmeng Song xuyun gao Bo Li Jun Li Xuzhuo Sun Chengbo Li Jiale Zhao Lin Chen Ning Wang Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry&Materials ScienceNorthwest UniversityXi'an 710069China College of Chemistry Chemical and Environmental EngineeringHenan University of TechnologyZhengzhou 450001China State Key Laboratory of Environment-Friendly Energy Material Southwest University of Science and TechnologyMianyang 621010China

Structural and functional biomimicking of the active site of [NiFe]-hydrogenases can provide helpful hints for designing bioinspired catalysts to replace the expensive noble metal catalysts for H2 generation and *** of dianion [Ni(phma)]2-[H4 phma=N,N’-1,2-phenylenebis(2-mercaptoacetamide)] with [NiCl2(dppp)](dppp=bis(diphenylphosphino)propane) yielded a dinickel product[Ni(phma)(μ-S,S’)Ni(dppp)](1) as the model complex relevant to the active site of [NiFe]-H2 *** structure of complex 1 has been characterized by single-crystal X-ray *** cyclic voltammetry and controlled potential electrolysis studies,complex 1 was found to be a moderate electrocatalyst for the H2-evoluting reaction using ClCH2COOH as the proton source.

关键词： Hydrogenase Electrocatalysis Hydrogen evolution Nickel complex Metallothiolate ligand

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中医药治疗胎怯的研究进展

中国中医药现代远程教育 2019年第5期17卷 136-139页

作者：高旭昀刘思娜韩鹏天津市滨海新区塘沽第一中学天津300450 北京中医药大学针灸推拿学院北京100029 北京中医药大学中医学院北京100029

胎怯,是指新生儿出生时体质量不足,身材矮小,脏腑形气均未充实的一种病症。胎怯儿大多数是早产儿,而近年来早产及并发症成为新生儿的首要死亡原因。现对近年来中医药治疗胎怯进行综述,从胎怯的病因病机、辨证分型以及中医治疗等几个方... 详细信息

胎怯,是指新生儿出生时体质量不足,身材矮小,脏腑形气均未充实的一种病症。胎怯儿大多数是早产儿,而近年来早产及并发症成为新生儿的首要死亡原因。现对近年来中医药治疗胎怯进行综述,从胎怯的病因病机、辨证分型以及中医治疗等几个方面总结,详细论述了中药疗法、推拿疗法以及五行音乐疗法等,以期对今后胎怯的研究提供力所能及的参考,推动医疗水平的不断提高。

关键词：胎怯综述中医药疗法早产儿产科

Synergic effect of covalent and chemical sulfur fixation enhancing the immobilization-conversion of polysulfides in lithium-sulfur batteries

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Journal of Energy Chemistry 2023年第4期79卷 1-11页

作者： Ruili gao Qian Zhang Hui Wang Fanghui Wang Jianwei Ren xuyun Wang Xianguo Ma Rongfang Wang College of Chemical Engineering State Key Laboratory Base for Eco-Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina School of Chemistry and Engineering Weifang Vocational CollegeWeifang 261108ShandongChina Department of Mechanical Engineering Science University of JohannesburgCnr Kingsway and University RoadsAuckland Park 2092JohannesburgSouth Africa School of Chemical Engineering Guizhou Institute of TechnologyGuiyang 550003GuizhouChina

Lithium-sulfur batteries(LSBs)are promising as the next generation energy storage ***,their wide applications have been technically challenged by the diffusion losses of polysulfides and polysulfide shuttle *** this work,the small organic molecules of 2,5-dichloropyrazine(2,5-DCP)were combined with Co-doped carbon(CoA NAC)flakes to achieve the synergic effect of the covalent and chemical sulfur fixation,so as that the immobilization-conversion of polysulfides in LSBs was greatly *** specifically,the nucleophilic substitution of the 2,5-DCP additive in the electrolyte with polysulfides formed the CAS *** the further covalent N-Li bonds between the N atoms in 2,5-DCP and polysulfides,sulfur fixation was achieved in the form of solid ***,the CoA NAC flakes served as the sulfur cathode to chemically anchor the *** interaction mechanism between CoA NAC/2,5-DCP and polysulfides was explored by the density functional theory(DFT)calculations and in-situ infrared *** results showed that the optimal“with 2,5-DCP”sample-assembled LSB exhibited an initial discharge specific capacity of 1244 mA h g^(-1)at 0.2C,and a capacity decay rate of 0.053%per cycle was displayed after 800 cycles at *** good cycling stability with a high sulfur-loaded electrode sample suggested that the synergic effect of covalent/chemical sulfur fixation enabled the enhancement of polysulfides immobilization-conversion in LSBs.

关键词： Lithium-sulfur battery Covalent sulfur-fixation Chemical sulfur-fixation Electrolyte additive Cycling stability

Mitigating Lattice Distortion of High‑Voltage LiCoO_(2)via Core‑Shell Structure Induced by Cationic Heterogeneous Co‑Doping for Lithium‑Ion Batteries

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Nano-Micro Letters 2024年第3期16卷 169-182页

作者： Zezhou Lin Ke Fan Tiancheng Liu Zhihang Xu gao Chen Honglei Zhang Hao Li xuyun Guo Xi Zhang Ye Zhu Peiyu Hou Haitao Huang Department of Applied Physics and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong KongPeople’s Republic of China Department of Applied Physics The Hong Kong Polytechnic UniversityHong KongPeople’s Republic of China Institute of Nanosurface Science and Engineering Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics EngineeringShenzhen UniversityShenzhenPeople’s Republic of China School of Physics and Technology University of JinanJinanShandongPeople’s Republic of China

Inactive elemental doping is commonly used to improve the structural stability of high-voltage layered transition-metal oxide ***,the one-step co-doping strategy usually results in small grain size since the low diffusivity ions such as Ti^(4+)will be concentrated on grain boundaries,which hinders the grain *** order to synthesize large single-crystal layered oxide cathodes,considering the different diffusivities of different dopant ions,we propose a simple two-step multi-element co-doping strategy to fabricate core–shell structured LiCoO_(2)(CS-LCO).In the current work,the high-diffusivity Al^(3+)/Mg^(2+)ions occupy the core of single-crystal grain while the low diffusivity Ti^(4+)ions enrich the shell *** Ti^(4+)-enriched shell layer(~12 nm)with Co/Ti substitution and stronger Ti–O bond gives rise to less oxygen ligand ***-situ XRD demonstrates the constrained contraction of c-axis lattice parameter and mitigated structural *** a high upper cut-off voltage of 4.6 V,the single-crystal CS-LCO maintains a reversible capacity of 159.8 mAh g^(−1)with a good retention of~89%after 300 cycles,and reaches a high specific capacity of 163.8 mAh g^(−1)at *** proposed strategy can be extended to other pairs of low-(Zr^(4+),Ta^(5+),and W6+,etc.)and high-diffusivity cations(Zn^(2+),Ni^(2+),and Fe^(3+),etc.)for rational design of advanced layered oxide core–shell structured cathodes for lithium-ion batteries.

关键词： Lithium-ion battery LiCoO_(2) Heterogeneous co-doping Core-shell structure High-voltage stability

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农用车辆橡胶隔振元件动力学模型研究

中国农机化学报 2021年第4期42卷 120-127页

作者：高琦邱绪云宋裕民山东交通学院汽车工程学院济南市250357

以某农用车辆发动机前悬置软垫为研究载体,研究橡胶隔振元件的动力学建模、参数辨识以及数值求解方法。首先通过动态加载试验分析发动机前悬置软垫动态特性的频率响应特性与幅值响应特性,建立一种弹性单元、摩擦单元和高阶分数导数粘弹... 详细信息

以某农用车辆发动机前悬置软垫为研究载体,研究橡胶隔振元件的动力学建模、参数辨识以及数值求解方法。首先通过动态加载试验分析发动机前悬置软垫动态特性的频率响应特性与幅值响应特性,建立一种弹性单元、摩擦单元和高阶分数导数粘弹性单元叠加的橡胶隔振元件动力学模型;然后提出基于广义多维学习策略和自适应调整策略的粒子群算法的粘弹性单元参数辨识方法,结合试验结果,辨识得到模型参数;最后推导高阶分数导数粘弹性单元的数值求解方法,将其运用于所建模型的求解。经试验验证,建立的模型能够精确地预测橡胶隔振元件的动态特性,在不同振幅和频率工况下,模型计算与试验得到动刚度的平均误差和最大误差分别为3.08%和4.52%,阻尼系数的平均误差和最大误差分别为4.58%和5.79%,对提高农用车辆各系统及整车动力学仿真精度有一定的意义。

关键词：橡胶隔振元件动态特性分数导数参数辨识数值求解

Room-temperature multiple ligands-tailored SnO_(2) quantum dots endow in situ dual-interface binding for upscaling efficient perovskite photovoltaics with high V_(OC)

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Light(Science & Applications) 2021年第12期10卷 2467-2481页

作者： Zhiwei Ren Kuan Liu Hanlin Hu xuyun Guo Yajun gao Patrick W.K.Fong Qiong Liang Hua Tang Jiaming Huang Hengkai Zhang Minchao Qin Li Cui Hrisheekesh Thachoth Chandran Dong Shen Ming-Fai Lo Annie Ng Charles Surya Minhua Shao Chun-Sing Lee Xinhui Lu Frédéric Laquai Ye Zhu Gang Li Department of Electronic and Information Engineering Research Institute for Smart Energy(RISE)Guangdong-Hong Kong-Macao(GHM)Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and DevicesThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Electrical and Computer Engineering Nazarbayev UniversityNur-SultanKazakhstan The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518057China Hoffmann Institute of Advanced Materials Shenzhen Polytechnic7098 Liuxian BoulevardShenzhen 518055China Department of Applied Physics The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina King Abdullah University of Science and Technology(KAUST) KAUST Solar Center(KSC)Physical Sciences and Engineering Division(PSE)Material Science and Engineering Program(MSE)Thuwal 23955-6900Kingdom of Saudi Arabia Department of Physics The Chinese University of Hong KongShatin 999077 Hong KongChina Center of Super-Diamond and Advanced Films(COSDAF) Department of ChemistryCity University of Hong KongHong KongChina

The benchmark tin oxide(SnO_(2))electron transporting layers(ETLs)have enabled remarkable progress in planar perovskite solar cell(PSCs).However,the energy loss is still a challenge due to the lack of“hidden interface”*** report a novel ligand-tailored ultrafine SnO_(2) quantum dots(QDs)via a facile rapid room temperature ***,the ligand-tailored SnO_(2) QDs ETL with multi-functional terminal groups in situ refines the buried interfaces with both the perovskite and transparent electrode via enhanced interface binding and perovskite *** novel ETLs induce synergistic effects of physical and chemical interfacial modulation and preferred perovskite crystallization-directing,delivering reduced interface defects,suppressed non-radiative recombination and elongated charge carrier *** conversion efficiency(PCE)of 23.02%(0.04 cm^(2))and 21.6%(0.98 cm^(2),V_(OC) loss:0.336 V)have been achieved for the blade-coated PSCs(1.54 eV E_(g))with our new ETLs,representing a record for SnO_(2) based blade-coated ***,a substantially enhanced PCE(V_(OC))from 20.4%(1.15 V)to 22.8%(1.24 V,90 mV higher V_(OC),0.04 cm^(2) device)in the blade-coated 1.61 eV PSCs system,via replacing the benchmark commercial colloidal SnO_(2) with our new ETLs.

关键词： perovskite interface quantum

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雾化溶液除湿系统最适液滴特性

化工进展 2020年第9期39卷 3574-3582页

作者：余旭芸杨自力龚斐然郜彩云东华大学环境科学与工程学院上海201620

液滴特性是影响雾化溶液除湿系统性能的关键因素,但目前适用于该类除湿系统的最佳液滴特性尚不明确。为此,本文基于雾化溶液除湿过程所遵循的质量、能量平衡,借助数值模拟及正交设计,以超声波雾化溶液除湿系统(UADS)为例,对除湿剂液滴... 详细信息

液滴特性是影响雾化溶液除湿系统性能的关键因素,但目前适用于该类除湿系统的最佳液滴特性尚不明确。为此,本文基于雾化溶液除湿过程所遵循的质量、能量平衡,借助数值模拟及正交设计,以超声波雾化溶液除湿系统(UADS)为例,对除湿剂液滴在各典型粒径、温度、质量分数等特性组合下的除湿性能进行研究。结果表明:随着液滴粒径的减小、溶液质量分数的增加以及液滴温度的降低,雾化除湿系统性能虽均有所提升,但其改善作用依次减弱;通过正交设计优化液滴特性组合,可显著提升雾化除湿系统性能。与液滴优化前相比,UADS系统在本文所得最适液滴特性下的性能,比传统典型性能(除湿速率为7.5g/s,除湿效率为48.5%)大幅提升,除湿速率提升31.04%,除湿效率改善达24.63%。研究可为雾化溶液除湿系统液滴特性的合理优选,并进一步提高系统的除湿性能及经济性提供积极参考。

关键词：吸收数值模拟传质除湿液滴雾化

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果园作业平台车架耐久性研究

中国农机化学报 2024年第1期45卷 160-168页

作者：刘佳奇邱绪云高琦宋裕民山东交通学院汽车工程学院济南市250357

针对农用机械作业工况复杂、受多种外力、对结构件寿命影响较大等问题,以果园作业平台车架为研究对象,编制车架加速载荷谱,分析车架耐久性。采用有限元分析方法,对车架进行力学分析并选取关键载荷测点,建立果园作业平台多体动力学模型... 详细信息

针对农用机械作业工况复杂、受多种外力、对结构件寿命影响较大等问题,以果园作业平台车架为研究对象,编制车架加速载荷谱,分析车架耐久性。采用有限元分析方法,对车架进行力学分析并选取关键载荷测点,建立果园作业平台多体动力学模型采集相应测点载荷谱,利用伪损伤保留编辑法获取不同伪损伤保留量的加速载荷谱,从压缩时间效率、伪损伤域、功率谱密度、穿级/雨流计数和统计值参数等方面对比,分析伪损伤保留量对加速载荷谱质量的影响。通过车架耐久性仿真对比不同编辑方案对耐久性分析精度和效率的影响。对比结果表明,伪损伤保留量不低于90%才能保证加速载荷谱的质量。仿真结果表明,车架最小寿命历程大约为65000 km,根据果园作业平台使用条件和用户使用情况调查,了解果园作业平台每年大约行驶8100 km,使用年限为8年,该车架满足要求。且伪损伤保留量为95%时为最佳编制方案,加速载荷谱时间压缩量为55%,车架耐久性仿真分析误差能控制在5%内且仿真效率提高391%,本文为提高农用机械部件耐久性载荷的编辑质量提供参考。

关键词：果园作业平台车架加速载荷谱伪损伤保留编制法耐久性

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运行压力对超声雾化溶液除湿系统性能的影响

化工学报 2020年第S1期71卷 129-135页

作者：杨自力郜彩云龚斐然余旭芸余赟蔡天逊东华大学环境科学与工程学院上海201620

基于溶液除湿热质传递过程中所遵循的质量平衡、能量平衡模型,以超声雾化溶液除湿系统(UADS)为例,探讨了在不同空气处理温度、湿度下,系统运行压力对除湿性能的影响。结果表明:随着运行压力的升高,UADS系统的除湿性能显著改善。特别是... 详细信息

基于溶液除湿热质传递过程中所遵循的质量平衡、能量平衡模型,以超声雾化溶液除湿系统(UADS)为例,探讨了在不同空气处理温度、湿度下,系统运行压力对除湿性能的影响。结果表明:随着运行压力的升高,UADS系统的除湿性能显著改善。特别是在所处理空气入口温度较高时,提升系统运行压力对除湿效率的提高作用更加显著。同时,当所处理空气的含湿量较大时,提高运行压力对系统除湿速率的增幅明显,而对除湿效率的改善作用减弱。此外,当除湿系统在较高压力下运行时,其除湿效率受所处理空气入口温湿度变化而产生的波动减小,系统性能稳定性显著改善。所得结果可对溶液除湿系统的高效、稳定运行提供积极参考。

关键词：溶液吸收运行压力除湿性能稳定性