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Enhanced electrochemical performance of Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3) solid electrolyte by anion doping

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Nano Research 2024年第3期17卷 1465-1472页

作者： Jingrui Kang Xu Guo Rui Gu Honglei Hao yi Tang Jiahui Wang Li Jin Hongfei Li Xiaoyong Wei Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’an 710049China School of Energy and Materials Shanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai 201209China

Nowadays,the majority of the studies on the substitution are focused on cations(such as Y^(3+),Ti^(4+),P^(5+),etc.)in Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP),while there are few studies on the substitution of anion O^(2-).In this work,the modified LATP with a series of Licl(LATPclx,x=0.1,0.2,0.3,0.4)additives is prepared to enhance ionic *** successful introduction of cl-makes the length of the c axis decrease from 20.822(2)to 20.792(1)Å,and the bulk conductivity of 2.13×10^(-3) S·cm^(-1) is achieved in LATPcl_(0.3).Moreover,the Al/Ti-O1/cl1 and Al/Ti-O_(2)/cl_(2) distance decrease,while the Li1-O_(2)/cl_(2) distance *** ions migrate more easily in the nanochannel of *** addition,the Licl additive increases the relative density and the grain boundary conductivity of LATPclx ***,a higher ionic conductivity of 2.12×10^(–4) S·cm^(-1) and a low activation energy of 0.30 eV are obtained in LATPcl_(0.3).correspondingly,the symmetric cell exhibits a low overpotential of±50 mV for over 200 h in LATPcl_(0.3).The solid-state Li|LATPcl_(0.3)|NcM811(NcM811=LiNi0.8co0.1Mn0.1O_(2))battery exhibits high initial capacity 185.1 mAh·g^(-1) with a capacity retention rate of 95.4%after 100 cycles at 0.5 *** result suggests that Licl additive is an effective strategy to promote electrochemical properties of LATP solid electrolyte and can be considered for reference to other inorganic solid electrolytes systems.

关键词： Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP)solid electrolyte anion doping ionic conductivity cyclic performance

High-entropy oxide-supported platinum nanoparticles for efficient hydrogen evolution reaction

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Rare Metals 2024年第4期43卷 1537-1546页

作者： Ming-Yu Fan Jia-Jun Wang Jun Zhao Hong Zhang Tian-yi Ma Xiao-Peng Han Wen-Bin Hu School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional Materials Key Laboratory of Advanced Ceramics and Machining TechnologyTianjin UniversityTianjin300350China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou350207China School of Science RMIT UniversityMelbourneVIC3000Australia

High-entropy oxides(HEOs)are a new class of single-phase structures with unique electronic and catalytic properties;therefore,it is worthwhile to explore their applications in *** this study,a Pt/(FecoNicrAl)_(3)O_(4)nanohybrid using HEO as a support was developed as an efficient catalyst for the hydrogen evolution reaction(HER).Pt/(FecoNicrAl)_(3)O_(4)exhibited high HER activity with a low overpotential of 22 mV at10 mA·cm^(-2),outperforming other binary,ternary,and quaternary *** HER activity of Pt/(FecoNicrAl)_(3)O_(4)was higher than that of a commercial Pt/c with a significantly lower Pt *** catalyst exhibited good activity and long-term stability(60 h)in an electrolytic water-splitting *** good activity can be attributed to the fact that the introduction of Pt effectively facilitates electronic interactions between Pt and the *** addition,the HEO substrate was more favorable for dispersing Pt particles,optimizing the electrochemical specific surface area,and significantly reducing the charge resistance of the *** study extends the application of HEOs in electrocatalysis and demonstrates the promising prospects of HEOs as supports for electrocatalysts.

关键词： High-entropy oxides Hydrogen evolution reaction Nanohybrid Water electrolysis

Dcalycinumines A-E,Alkaloids with cytotoxic Activities of Nasopharyngeal carcinoma cells from Daphniphyllum calycinum

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chinese Journal of chemistry 2024年第1期42卷 35-42页

作者： Qing Tang Xiao-Yong Dai Qiang Lin Zhi-Peng Ling yi-Kun Hao Tian-Xi Zhu Ji-Hui Zhang yi-Bo Hou Yao-Lan Li Lai-Qiang Huang Jing-Hao Wang Guo-cai Wang Yu-Bo Zhang Guangdong clinical Translational centerfor Targeted Drug Department of PharmacologySchoolof MedicineJinan University GuangzhouGuangdong 510632China Institute of Traditional chinese Medicine&Natural Products Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs ResearchCollegeof PharmacyJinan UniversityGuangzhouGuangdong511443China Institute of Biopharmaceutical and Health Engineering Shenzhen Key Laboratory of Gene and Antibody TherapyState Key Laboratory of Chemical OncogenomicsShenzhen International Graduate SchoolTsinghua UniversityShenzhenGuangdong 518055China The Guangzhou Key Laboratoryof Basic and Translational Research on chronic Disease Department of PharmacyThe First Affiliated HospitalJinan UniversityGuangzhouGuangdong 510630China

Fivenovel Daphniphyllum alkaloids,named dcalycinumines A-E(1-4,6),andeight previously described Daphniphyllum alkaloids(5,7-13)were isolated from Daphniphyllum *** 1 is the first Daphniphyllum alkaloid possessing a highly rearranged 6/6/6/7/5/6 hexacyclic architecture with a unique 3-methyl-1-azabicyclo[4,4,0]decane ring *** 2 represents a rare diamino Daphniphyllum alkaloid with an unprecedented 6/5/5/6/6/5 carbon skeleton featuring a unique 1-aza-6-azaspiro[4,5]decane unit,whereas 3 also represents a rare diamino Daphniphyllum alkaloid as a possible precursor of *** 4 is the second example of c-22-nor yuzurimine-type *** structures and absolute configurations were elucidated by HRESIMS,NMR spectroscopic analyses,EcD calculations,and single-crystal X-ray ***,compound 1 showed remarkable antitumor activities,which could inhibit the proliferation,migration and invasion of nasopharyngeal carcinoma cells,and promoted nasopharyngeal carcinoma cells apoptosis.

关键词： Daphniphyllum calycinum Natural products Daphniphyllum alkaloid Structural elucidation Biological activity Apoptosis Nasopharyngealcarcinoma

corrosion behavior of Al_(2)O_(3)-c bricks in MnO-containing mold slag

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Journal of Iron and Steel Research(International) 2024年第6期31卷 1486-1492页

作者： yi-jiang Zhao Guang-qiang Li Yang Wu cheng Yuan Ze Meng Xiao-xuan Deng Yu Liu The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081HubeiChina Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking Wuhan University of Science and TechnologyWuhan 430081HubeiChina Research Institute of Technology Shougang Group Co.Ltd.Beijing 100043China

In order to explore the corrosion mechanism of Al_(2)O_(3)-c refractories in the mold flux bearing MnO,the immersion test of Al_(2)O_(3)-c refractories in caO-SiO2-caF2-MnO slag with different MnO contents was carried out at 1550℃.The results show that Mn particles were observed in the slag after experiment,due to the reduction of MnO by graphite in *** amounts of graphite were observed at the interface between refractories and slag,indicating that the oxidation of graphite is limited by the poor contact between graphite and molten ***,the oxidation of graphite is not the main cause of damage to refractories.A small quantity of caO·2Al_(2)O_(3)(cA_(2))and caO·6Al_(2)O_(3)(cA_(6))adjacent to Al_(2)O_(3) grain was detected at the slag/reaction layer ***_(2) and cA_(6) possess relatively high melting points,which is beneficial to hindering the further penetration of ***,the dissolution of Al_(2)O_(3) into slag is still the main cause for refractories *** increase in the MnO content of mold slag decreases the viscosity and then results in the severe corrosion of Al_(2)O_(3)-c bricks.

关键词： Al_(2)O_(3)-c refractory MnO-containing slag Graphite corrosion

Sensing properties and mechanisms of LaF_(3)-co_(3)O_(4) nanorods for low-concentration methanol detection

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Rare Metals 2024年第5期43卷 2193-2204页

作者： Xiao-Xi He Hong-Feng chai yi-Wen Zhou Ke-Wei Liu Ze-Xin Yu chao Zhang college of Mechanical Engineering Yangzhou UniversityYangzhou225127China Institutefor Manufacturing Technologies of ceramic components and composites(IMTccc) University of Stuttgart70569 StuttgartGermany

Methanol is one of the characteristic gases that distinguish between healthy individuals and lung cancer(Lc)lesions in exhaled human *** concentration in exhaled breath is generally below one part per million(1×10^(-6)).The second-phase composite is widely regarded as one of the methods to improve the gas-sensing perfor-mance of metal oxide semiconductor(MOS)*** this study,LaF_(3)-co_(3)O_(4) was synthesized by a simple hydrothermal method to enhance its low-concentration methanol gas-sensing performance.5 at%LaF_(3)-co_(3)O_(4) nanorods exhibited excellent methanol detection performance,including a wider linear detection concentration range(0.2×10^(-6)~5×10^(-6)),a response value exceeding 4.0 for 1×10^(-6)methanol at 275°c and 75%relative humidity(RH),long-term stability(maximum deviation within 15%over 2 weeks),and excellent *** mechanism of performance enhancement was studied using various techniques,and density functional *** special spinel structure of co_(3)O_(4),the high ionic migration of F-in LaF_(3),the larger specific surface area of 5 at%LaF_(3)-co_(3)O_(4) nanorods,and the generated crystal defects all explain the excellentmethanol gas-sensing *** work provides a novel route to prepare MOS composite materials for low-concentration methanol gas detection.

关键词： Gas sensor LaF_(3) co_(3)O_(4) Methanol Lung cancer

Acetylene/argon mixture plasma to build ultrathin carbon bridge of cF_(x)/c/MnO_(2) for high-rate lithium primary battery

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Rare Metals 2024年第6期43卷 2574-2584页

作者： Da-Wei Zou Xing-Guang Fu Gao-Bang chen yi-Fan Liu Bao-Shan Wu Xian Jian School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 31300lChina

Forming an ultrathin conducting layer on a fluorinated carbon(cFx)surface for reducing severe electrochemical polarization in lithium/fluorinated carbon primary batteries(Li/cF_(x))remains a considerable challenge for achieving batteries with excellent rate ***,cFxwas modified by using acetylene/argon mixture plasma combined with MnO_(2)*** cF_(x)/c/MnO_(2)composite effectively reduced the voltage hysteresis and improved the electrochemical performance of Li/cF_(x).The excellent rate performance of cF_(x)/c/MnO_(2)was due to the high electrochemical activity provided by the atomicscale conductive carbon layer and ultrafine MnO_(2)*** with pristine cF_(x),the charge transfer resistance of the optimized cF_(x)/c/MnO_(2)decreased from 218.5 to 48.2Ω,the discharge rate increased from 2c to 10c,and the power density increased from 3.11 to 13.44 kW·g^(-1),The intrinsic reason for the enhanced rate performance was attributed to the fact that the ultrathin carbon layer acted as a conductive bridge to reduce the voltage hysteresis at the initial stage of the Li/cF_(x)discharge,and the high electrochemical activity of the ultrafine MnO_(2)particles provided a faster lithium-ion diffusion rate.

关键词： c_(2)H_(2)/Ar plasma Fluorinated carbon Lithium primary battery MnO_(2)

Synergistic Brønsted Base/Photoredox-catalyzed Three-component coupling with Malonates to Synthesize δ-Hydroxy Esters and δ-Keto Esters

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chinese Journal of chemistry 2024年第9期42卷 957-962页

作者： Ting Li Wei Wang Ming Dong Zhije Zhang Sha Yu Zhengchu chen Siping Wei Dong yi Green Pharmaceutical Technology Key Laboratory of Luzhou city Central Nervous System Drug Key Laboratory of Sichuan ProvinceSchoolof PharmacySouthwestMedicalUniversityLuzhouSichuan 646000China Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan Province LuzhouSichuan 646000China

Multicomponent alkene 1,2-dicarbofunctionalizations(DcFs)have emerged as a powerful strategy to rapidly incorporate both two carbon subunits across one c-c double bond in one step for enhancing molecular complexity and *** the best of our knowledge,there is only one report on photoredox-catalyzed three-component DcFs with malonates through the radical−radical cross-coupling,while photoredox-catalyzed radical-polar crossover(RPc)-type DcFs with malonates were still ***,we describe a redox-neutral RPc-type 1,2-dialkylation of styrenes with malonates and aldehydes through the synergistic Brønsted base/photoredox catalysis *** transition-metal-free strategy provides an efficient and clean approach to a broad variety ofδ-hydroxy esters and also features exceptionally mild conditions,wide compatibility of substrate scope and functional groups,and high atomic ***,three-component 1,2-alkylacylation from the same starting materials was achieved in one-pot manner through such RPc-type coupling and subsequent two-electron oxidation process,providing a set ofδ-keto esters of interest in pharmaceutical research.

关键词： Alkene difunctionalization Photoredox catalysis Malonates Radical reactions c-c coupling Synthetic methods Aldehydes Alkylation Multicomponentreactions

Serum 25-hydroxyvitamin D,genetic susceptibility,and the risk of incident type 2 diabetes:A prospective cohort in East china

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chinese Medical Journal 2024年第8期137卷 972-979页

作者： ying Sun Haojie Zhang Bin Wang Yuying Wang chi chen yi chen yingli Lu Ningjian Wang Institute and Department of Endocrinology and Metabolism Shanghai Ninth People’s HospitalShanghai JiaoTong University School of MedicineShanghai 200011China Department of Endocrinology and Metabolism and Department of Guideline and Rapid Recommendation Cochrane China CenterMAGIC China CenterChinese Evidence-Based Medicine CenterWest China HospitalSichuan UniversityChengduSichuan 610041China Department of Endocrinology Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China

Background:The serum vitamin D level varies widely by population,and studies have linked vitamin D levels with the risk of type 2 diabetes mellitus(T2DM).However,the relationship is inconsistent and the impact of vitamin D on T2DM among East chinese adults is *** study aimed to investigate the association between serum 25-hydroxyvitamin D(25[OH]D)levels and the risk of T2DM and evaluated whether the association is modified by genetic ***:In the Survey on Prevalence in East china for Metabolic Diseases and Risk Factors(SPEcT-china)cohort,1862 participants free of T2DM at baseline were included.A weighted genetic risk score was calculated with 28 variants associated with *** logistic models were used to examine the association of serum 25(OH)D and genetic risk with ***:After a 5-year follow-up,132 cases of T2DM were *** observed no significant association between quartiles of serum 25(OH)D and T2DM risk after multivariable adjustment(χ^(2)=0.571,P_(for trend)=0.426).compared to those in the lowest quartile of 25(OH)D,the odds ratios(ORs)(95%confidence interval[cI])for participants with increased quartiles were 1.29(0.74-2.25),1.35(0.77-2.36),and 1.27(0.72-2.24),*** observed a positive association of glycated hemoglobin(HbA1c)with 25(OH)D at baseline(β=1.752,P=0.001)and after follow-up(β=1.385,P=0.003),and a negative association of ln conversion homeostasis model assessment(HOMA)-βwith 25(OH)D at baseline(β=-0.982,P=0.021).There was no significant interaction between 25(OH)D and diabetes genetic predisposition on the risk of T2DM(χ^(2)=2.710,P_(for interaction)=0.100).The lowest OR(95%cI)of T2DM was among participants with low genetic risk and the highest quartile of 25(OH)D(0.17[0.05-0.62]).conclusion:Serum 25(OH)D may be irrelevant to the risk of incident T2DM among East chinese adults regardless of genetic predisposition.

关键词： Vitamin D Diabetes mellitus,Type 2 Genetic predisposition to disease Prospective cohort Glycated hemoglobin SPEcT-china

Exploring charge and spin fluctuations in infinite-layer cuprate SrcuO_(2)from a phonon perspective

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Science china(Physics,Mechanics & Astronomy) 2024年第8期67卷 159-167页

作者： Xin Du Pei-Han Sun Ben-chao Gong Jian-Feng Zhang Zhong-yi Lu Kai Liu Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices Renmin University of ChinaBeijing 100872China Department of Physics School of ScienceJiangsu University of Science and TechnologyZhenjiang 212100China Institute of Physics Chinese Academy of SciencesBeijing 100190China Key Laboratory of Quantum State construction and Manipulation(Ministry of Education) Renmin University of ChinaBeijing 100872China

The infinite-layer cuprate Acu O_(2)(A=ca,Sr,Ba)possesses the simplest crystal structure among numerous cuprate superconductors and can serve as a prototypical system to explore the unconventional *** on the first-principles electronic structure calculations,we have studied the electronic and magnetic properties of the infinite-layer cuprate SrcuO_(2)from a phonon *** find that interesting fluctuations of charges,electrical dipoles,and local magnetic moments can be induced by the atomic displacements of phonon modes in SrcuO_(2)upon the hole *** all optical phonon modes of SrcuO_(2)in the antiferromagnetic Néel state,only the A_(1g)mode that involves the full-breathing O vibrations along the cu-O bonds can cause significant fluctuations of local magnetic moments on O atoms and dramatic charge redistributions between cu and O ***,due to the atomic displacements of the A_(1g)mode,both the charge fluctuations on cu and the electrical dipoles on O show a dome-like evolution with increasing hole doping,quite similar to the experimentally observed behavior of the superconducting T_(c);in comparison,the fluctuations of local magnetic moments on O display a monotonic enhancement along with the hole *** analyses indicate that around the optimal doping,there exists a large softening in the frequency of the A_(1g)phonon mode and a van Hove singularity in the electronic structure close to the Fermi level,suggesting potential electron-phonon *** work reveals the important role of the full-breathing O phonon mode playing in the infinite-layer SrcuO_(2),which may provide new insights in understanding the cuprate superconductivity.

关键词： first-principles calculations cuprate superconductors phonon charge and spin fluctuations