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Engineering the axial coordination of cobalt single atom catalysts for efficient photocatalytic hydrogen evolution

Nano Research 2024年第6期17卷 5114-5121页

作者： Ning Kang Lingwen Liao xue Zhang Zhen He Binlu yu Jiahong Wang Yongquan Qu Paul KChu Seeram Ramakrishna xue-feng yu Xin Wang Licheng Bai Materials Interfaces Center Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences(CAS)Shenzhen 518055China Key Laboratory of Materials Physics Anhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of SciencesHefei 230031China Department of Chemistry City University of Hong KongKowloonHong Kong 999077China Hong Kong Branch of National Precious Metals Material Engineering Research Center(NPMM) City University of Hong KongKowloonHong Kong 999077China 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 Department of Physics and Department of Materials Science and Engineering City University of Hong KongKowloonHong Kong 999077China National University of Singapore(NUS)Centre for Nanofibers and Nanotechnology Department of Mechanical EngineeringNational University of SingaporeSingapore 117542Singapore

Improving the catalytic activity of non-noble metal single atom catalysts(SACs)has attracted considerable attention in materials *** optimizing the local electronic structure of single atom can greatly improve their catalytic activity,it often involves in-plane modulation and requires high ***,we report a novel strategy to manipulate the local electronic structure of SACs via the modulation of axial Co-S bond anchored onto graphitic carbon nitride(C_(3)N_(4))at room temperature(RT).Each Co atom is bonded to four N atoms and one S atom(Co-(N,S)/C_(3)N_(4)).Owing to the greater electronegativity of S in the Co-S bond,the local electronic structure of the Co atoms is available to be controlled at a relatively moderate ***,when employed for the photocatalytic hydrogen evolution reaction,the adsorption energy of intermediate hydrogen(H*)on the Co atoms is remarkably *** the presence of the Co-(N,S)/C_(3)N_(4)SACs,the hydrogen evolution rates reach up to 10 mmol/(g·h),which is nearly 10 and 2.5 times greater than the rates in the presence of previously reported transition metal/C_(3)N_(4)and noble platinum nanoparticles(PtNPs)/C_(3)N_(4)catalysts,*** to the tailorable axial Co-S bond in the SAC,the local electronic structure of the Co atoms can be further optimized for other photocatalytic *** axial coordination engineering strategy is universal in catalyst designing and can be used for a variety of photocatalytic applications.

关键词： transition metal single-atom local electronic structure photocatalytic hydrogen evolution graphitic carbon nitride axial coordination environment

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Multifunctional catalytic sites regulation of atomic-scale iridium on orthorhombic-CoSe_(2)for high efficiency dual-functional alkaline hydrogen evolution and organic degradation

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Journal of Energy Chemistry 2024年第5期92卷 271-281页

作者： Jingjing Huang Chenglin Zhong Yanjie Xia Jia Liu Guizhen Li Chao Yang Jiahong Wang Qian Wang Zhenbao Zhang feng Yan Jianghua Wu yu Deng Zhenjiang Zhou Xingchen He Paul K.Chu Woon-Ming Lau xue-feng yu College of Chemistry and Chemical Engineering Linyi UniversityLinyi 276005ShandongChina Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093JiangsuChina College of Biosystems Engineering and Food Science Zhejiang UniversityHangzhou 310058ZhejiangChina Department of Physics Department of Materials Science and EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina

The earth-abundant and high-performance catalysts are crucial for commercial implementation of hydrogen evolution reaction(HER).Herein,a multifunctional site strategy to construct excellent HER catalysts by incorporating iridium(Ir)ions on the atomic scale into orthorhombic-CoSe2(Ir-CoSe_(2))was *** hydrogen evolution activity in alkaline media such as a low overpotential of 48.7 mV at a current density of 10 mA cm^(-2)and better performance than commercial Pt/C catalysts at high current densities were found in the Ir-CoSe_(2) *** the experiments and theoretical calculations,it was revealed that Ir enabled CoSe_(2)to form multifunctional sites to synergistically catalyze alkaline HER by promoting the adsorption and dissociation of H_(2)O(Ir sites)and optimizing the binding energy for H^(*)on Co *** was noticeable that the electrolytic system comprising the Ir-CoSe_(2)electrode not only produced hydrogen efficiently via HER,but also degraded organic pollutants(Methylene blue).The cell voltage of the dual-function electrolytic system was 1.58 V at the benchmark current density of 50 mA cm^(-2),which was significantly lower than the conventional water splitting *** was indicated that this method was a novel strategy for designing advanced HER electrocatalysts by constructing multifunctional catalytic sites for hydrogen production and organic degradation.

关键词： Orthorhombic-CoSe_(2) Multifunctional sites design Hydrogen evolution reaction Synergistically catalyze Methylene blue oxidation

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Therapeutic Effectiveness of Leukocyte-and Platelet-rich Fibrin for Diabetic Foot Ulcers:A Retrospective Study

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Current Medical Science 2024年第3期44卷 568-577页

作者： Fen WANG Xiao-ling ZHANG Jing ZHANG Song GONG Jing TAO Hui XIANG Xiao-qing FU Xu-na BIAN xue-feng yu An-hui XU Cheng-la YI Shi-ying SHAO Department of Endocrinology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Branch of National Clinical Research Center for Metabolic Diseases Wuhan430030China Department of Radiology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Department of Trauma Surgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China

Objective Diabetic foot ulcer(DFU)is one of the most serious complications of ***-and platelet-rich fibrin(L-PRF)is a second-generation autologous platelet-rich *** study aims to investigate the clinical effects of L-PRF in patients with diabetes in real clinical *** Patients with DFU who received L-PRF treatment and standard of care(SOC)from 2018 to 2019 in Tongji Hospital were *** clinical information including patient characteristics,wound evaluation(area,severity,infection,blood supply),SOC of DFU,and images of ulcers was retrospectively extracted and analyzed.L-PRF treatment was performed every 7±2 days until the ulcer exhibited complete epithelialization or an overall percent volume reduction(PVR)greater than 80%.Therapeutic effectiveness,including overall PVR and the overall and weekly healing rates,was *** Totally,26 patients with DFU were enrolled,and they had an ulcer duration of 47.0(35.0,72.3)*** severity and infection of ulcers varied,as indicated by the Site,Ischemia,Neuropathy,Bacterial Infection,and Depth(SINBAD)scores of 2–6,Wagner grades of 1–4,and the Perfusion,Extent,Depth,Infection and Sensation(PEDIS)scores of 2–*** initial ulcer volume before L-PRF treatment was 4.94(1.50,13.83)cm3,and the final ulcer volume was 0.35(0.03,1.76)*** median number of L-PRF doses was 3(2,5).A total of 11 patients achieved complete epithelialization after the fifth week of treatment,and 19 patients achieved at least an 80%volume reduction after the seventh *** overall wound-healing rate was 1.47(0.63,3.29)cm3/week,and the healing rate was faster in the first 2 weeks than in the remaining *** treatment did not change the percentage of complete epithelialization or healing *** Adding L-PRF to SOC significantly improved wound healing in patients with DFU independent of the ankle brachial index,SINBAD score,or Wagner grade,indicating that this method is appropriate for D

关键词： diabetic foot ulcer autologous platelet-rich plasma leukocyte-and platelet-rich fibrin standard of care percentage volume reduction

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θ-型C-Z算子与Lipschitz函数生成的交换子在齐次变指标Herz空间上的有界性

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数学的实践与认识 2024年第7期54卷 199-210页

作者：薛凤宇牡丹江师范学院数学系黑龙江牡丹江157011

证明了θ-型Calderon-Zygmund算子与Lipschitz函数生成的交换子在具有三个变指标的齐次Herz空间K^(α(·),q^(·)/p^(·)(R^(n))上的有界性.

关键词： θ-型Calderon-Zygmund算子交换子变指标Herz空间 Lipschitz函数

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氢分子在Na_(2)Al_(6)团簇上的吸附和解离性能

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原子与分子物理学报 2024年第6期41卷 46-51页

作者：仝小刚马维红薛玉峰李伟陇南师范高等专科学校陇南742500

氢的物理和化学吸附是氢存储的基本形式,而H_(2)分子的解离能垒是决定可逆储氢动力学性能的重要因素.纳米团簇是研究材料储氢性能的重要物质层次,研究氢与Na-Al团簇的相互作用性质能够了解纳米尺度的Na-Al氢化物的储氢性能.本文利用密... 详细信息

氢的物理和化学吸附是氢存储的基本形式,而H_(2)分子的解离能垒是决定可逆储氢动力学性能的重要因素.纳米团簇是研究材料储氢性能的重要物质层次,研究氢与Na-Al团簇的相互作用性质能够了解纳米尺度的Na-Al氢化物的储氢性能.本文利用密度泛函理论,计算研究了H_(2)分子在较小的合金团簇Na_(2)Al_(6)上的吸附与解离性能.结果表明H_(2)分子在Na_(2)Al_(6)团簇上是弱的物理吸附,但很容易发生解离.氢分子的解离能垒很低,解离可以在环境温度下发生,纳米结构的Na_(2)Al_(6)团簇具有良好的化学储氢性能.

关键词：密度泛函理论 Na_(2)Al_(6)团簇储氢性能解离能垒

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High Temperature Seedless Synthesis of Au NRs Using BDAC/CTAB Co-surfactant

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Chinese Journal of Chemical Physics 2008年第5期21卷 476-480页

作者： Min Li Lai Wei Xian Zhang xue-feng yu Department of Physics Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education Wuhan University Wuhan 430072 China

Au nanorods have been successfully synthesized at 90 ℃ by using hexadecyltrimethylammonium bromide （CTAB） and benzyldimethylammoniumchloride hydrate （BDAC） co-surfactant. At 90 ℃, the reaction time was less than 10 s, and the longitudinal surface plasmon absorption band could vary between 680 and 770 nm by adjusting the molar ratio of BDAC to CTAB from 2 to 0.5. At 90 ℃, nanorods with a longitudinal surface plasmon absorption peak of 770 nm can be obtained when the molar ratio of BDAC to CTAB was 3：2.

关键词： Au nanorod Hexdecyltrimethylammonium bromide Benzyldimethylammoniumchloride hydrate High temperature

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A pipelined architecture for normal I/O order FFT

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第1期12卷 76-82页

作者： xue LIU feng yu Ze-ke WANG Department of Instrument Engineering Zhejiang University Hangzhou 310027 China

We present a novel pipelined fast Fourier transform (FFT) architecture which is capable of producing the output sequence in normal order.A single-path delay commutator processing element (SDC PE) has been proposed for the first *** saves a complex adder compared with the typical radix-2 butterfly *** new pipelined architecture can be built using the proposed processing *** proposed architecture can lead to 100% hardware utilization and 50% reduction in the overall number of adders required in the conventional pipelined FFT *** order to produce the output sequence in normal order,we also present a bit reverser,which can achieve a 50% reduction in memory usage.

关键词： Fast Fourier transform (FFT) Single-path delay commutator (SDC) Pipelined FFT Bit reverser

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Subsurface intercalation activating basal plane of black phosphorus for nitrogen reduction

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Journal of Energy Chemistry 2021年第9期30卷 293-299页

作者： xue Zhang Haitao Zhao Paul K.Chu Jiahong Wang xue-feng yu Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina

Ammonia(NH3)is not only an important chemical in many fields,but also provides a promising intermediate for energy stor-age[1,2].To produce NH3 from naturally abundant N2,the strong N≡N bond in the inert N2 molecules... 详细信息

关键词： Subsuface intercalation Nitrogen reduction reaction Basal surface sites Intrinsic activity Selectivity

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Steroids from the Roots of Asparagus officinalis and Their Cytotoxic Activity

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Journal of Integrative Plant Biology 2008年第6期50卷 717-722页

作者： xue-feng Huang yu-Ying Lin Ling-Yi Kong Department of Natural Medicinal Chemistry China Pharmaceutical University Nanjing 210009 China

One new （Sarsasapogenin O） and seven known steroids were isolated from the roots of Asparagus offlcinalis L. Their structures were elucidated on the basis of spectroscopic analysis, including various 2D-NMR techniques, hydrolysis, and by comparison of spectral data of known compounds. These compounds together with nine steroids which were previously isolated from this plant, were tested for cytotoxic activity. Among them, eight compounds displayed significant cytotoxiciUes against human A2780, HO-8910, Eca-109, MGC-803, CNE, LTEP-a-2, KB and mouse L1210 tumor cells.

关键词： Asparagus officinalis cytotoxic activity Sarsasapogenin O steroid

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Expert Consensus on Cognitive Dysfunction in Diabetes

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Current Medical Science 2022年第2期42卷 286-303页

作者： Yan YANG Jia-jun ZHAO xue-feng yu Division of Endocrinology Department of Internal MedicineTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Department of Endocrinology Shandong Provincial Hospital Affiliated to Shandong UniversityJinan25000China

The incidence of diabetes is gradually increasing in China,and diabetes and associated complications,such as cognitive dysfunction have gained much attention in recent ***,the concepts,clinical treatment,and prevention of cognitive dysfunction in patients with diabetes remain *** Chinese Society of Endocrinology investigated the current national and overseas situation of cognitive dysfunction associated with *** on research both in China and other countries worldwide,the Expert Consensus on Cognitive Dysfunction in Diabetes was established to guide physicians in the comprehensive standardized management of cognitive dysfunction in diabetes and to improve clinical outcomes in Chinese *** consensus presents an overview,definition and classification,epidemiology and pathogenesis,risk factors,screening,diagnosis,differential diagnosis,treatment,and prevention of cognitive dysfunction in patients with diabetes.

关键词： diabetes cognitive dysfunction antidiabetic agents

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