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Journal of Materials Science & Technology 2024年第5期172卷 166-184页

作者： Tianxu Zheng Yaobo Hu Chao Zhang tianshuo zhao Bin Jiang Fusheng Pan Aitao Tang College of Materials Science and Engineering Chongqing UniversityChongqing400044China National Engineering Research Center for Magnesium Alloys Chongqing400044China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai200240China

The aim of this research was to elucidate the underlying mechanism involved in the formation of rare earth(RE)texture and pseudo fiber bimodal microstructure in the high ductility Mg-2Gd-0.4Zr *** microstructure and texture evolution during the extrusion process were analyzed using various tech-niques,including optical microscopy(OM),scanning electron microscopy(SEM),electron backscatter diffraction(EBSD),and electron probe microanalysis(EPMA).The findings revealed that the RE texture in the extruded Mg-2Gd-0.4Zr alloy emerged during the dynamic recrystallization(DRX)process and was further strengthened during the subsequent static recrystallization and grain growth *** nu-cleation and growth of grains in the streamline region of Zr particles were delayed in comparison to other regions due to the pinning effect of Zr particles,ultimately resulting in the formation of pseudofiber bi-modal microstructure in the extruded Mg-2Gd-0.4Zr alloy.

关键词： Magnesium alloys Ductility Rare earth texture Bimodal microstructure

Rational design of vitamin C/defective carbon van der Waals heterostructure for enhanced activity,durability and storage stability toward oxygen reduction reaction

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Journal of Energy Chemistry 2024年第1期88卷 103-111,I0003页

作者： Ruiqi Cheng Kaiqi Li Huanxin Li tianshuo zhao Yibo Wang Qingyue Xue Jiao Zhang Chaopeng Fu Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Christopher Ingold Laboratory Department of ChemistryUniversity College LondonLondon WC1H 0AJUK Department of Chemistry Physical&Theoretical Chemistry LaboratoryUniversity of OxfordSouth Parks RoadOxford OX13QZUK

Metal-free defective carbon materials with abundant active sites have been widely studied as low-cost and efficient oxygen reduction reaction(ORR)electrocatalysts in metal-air ***,the active sites in defective carbon are easily subjected to serious oxidation or hydroxylation during ORR or storage,leading to rapid degradation of ***,we design a van der Waals heterostructure comprised of vitamin C(VC)and defective carbon(DC)to not only boost the activity but also enhance the durability and storage stability of the DC-VC *** formation of VC van der Waals between DC and VC is demonstrated to be an effective strategy to protect the defect active sites from oxidation and hydroxylation degradation,thus significantly enhancing the electrochemical durability and storage anti-aging ***,the DC-VC van der Waals can reduce the reaction energy barrier to facilitate the *** findings are also confirmed by operando Fourier transform infrared spectroscopy and density functional theory *** is necessary to mention that the preparation of this DC-VC electrocatalyst can be scaled up,and the ORR performance of the largely produced electrocatalyst is demonstrated to be very ***,the DC-VC-based aluminum-air batteries display very competitive power density with good performance maintenance.

关键词： Van der Waals heterostructure Oxygen reduction reaction Stability Scalable production Aluminum-air battery

In-situ transformed Mott-Schottky heterointerface in silver/manganese oxide nanorods boosting oxygen reduction,oxygen evolution,and hydrogen evolution reactions

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Nano Research 2024年第5期17卷 3622-3632页

作者： Ruiqi Cheng Kaiqi Li Huanxin Li Fengzhan Sun Xiaoqian He tianshuo zhao Jiao Zhang Chaopeng Fu Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Christopher Ingold Laboratory Department of ChemistryUniversity College LondonLondon WC1H 0AJUK Department of Chemistry Physical&Theoretical Chemistry LaboratoryUniversity of OxfordSouth Parks RoadOxford OX13QZUK Center of Hydrogen Science School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The development of non-platinum group metal(non-PGM)and efficient multifunctional electrocatalysts for oxygen reduction reaction(ORR),oxygen evolution reaction(OER),and hydrogen evolution reaction(HER)with high activity and stability remains a great ***,by in-situ transforming silver manganese composite oxide heterointerface into boosted Mott-Schottky heterointerface through a facile carbon reduction strategy,a nanorod-like silver/manganese oxide with superior multifunctional catalytic activities for ORR,OER and HER and stability was *** nanorod-like silver/manganese oxide with Mott-Schottky heterointerface(designated as Ag/Mn_(3)O_(4))exhibits an ORR half-wave potential of 0.831 V(***)in 0.1 M KOH,an OER overpotential of 338 mV and a HER overpotential of 177 mV at the current density of 10 mA·cm^(-2)in 1 M KOH,contributing to its noble-metal benchmarks comparable performance in aqueous aluminum-air(Al-air)battery and laboratorial overall water splitting electrolytic ***,in-situ electrochemical Raman and synchrotron radiation spectroscopic measurements were conducted to further illustrate the catalytic mechanism of Ag/Mn_(3)O_(4)Mott-Schottky heterointerface towards various electrocatalytic *** the heterointerface,the Ag phase serves as the electron donor and the active phase for ORR and HER,while the Mn_(3)O_(4)phase serves as the electron acceptor and the active phase for OER,*** work deepens the understanding of the Mott-Schottky effect on electrocatalysis and fills in the gap in fundamental physical principles that are behind measured electrocatalytic activity,which offers substantial implications for the rational design of cost-effective multifunctional electrocatalysts with Mott-Schottky effect.

关键词： heterointerface electron donor-acceptor pair electrocatalyst Al-air battery water splitting

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小庄煤矿液态二氧化碳驱替技术研究与应用

山东煤炭科技 2024年第3期42卷 93-97页

作者：徐传玉窦桂东赵天烁陕西彬长小庄矿业有限公司陕西咸阳713500 西安科技大学安全科学与工程学院陕西西安710054

煤层瓦斯抽采效率不足是高瓦斯及突出矿井采掘接续困难和瓦斯事故频发的主要原因,为了提高煤层采前瓦斯预抽效率,降低矿井瓦斯灾害治理成本,基于液态二氧化碳对煤层进行低温致裂增透和对煤层瓦斯进行相变交换置换驱替的两方面影响,针对... 详细信息

煤层瓦斯抽采效率不足是高瓦斯及突出矿井采掘接续困难和瓦斯事故频发的主要原因,为了提高煤层采前瓦斯预抽效率,降低矿井瓦斯灾害治理成本,基于液态二氧化碳对煤层进行低温致裂增透和对煤层瓦斯进行相变交换置换驱替的两方面影响,针对彬长小庄煤矿低透气性、瓦斯难以抽采的问题,以40205工作面为研究对象,通过对其进行液态二氧化碳驱替煤层气技术深入分析和工程应用,分析了现场抽采效果。现场应用表明,驱替后的钻孔内瓦斯浓度平均增加1.425倍,纯量平均增加1.33倍,瓦斯抽采效率明显提升。该结果初步证实了液态二氧化碳驱替技术的适用性,为煤矿瓦斯抽采提供了一定的技术支撑。

关键词：煤矿二氧化碳驱替瓦斯抽采

Influence of extrusion conditions on microstructure and mechanical properties of Mg-2Gd-0.3Zr magnesium alloy

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Journal of Magnesium and Alloys 2022年第2期10卷 420-433页

作者： tianshuo zhao Yaobo Hu Chao Zhang Bing He Tianxu Zheng Aitao Tang Fusheng Pan College of Materials Science and Engineering Chongqing UniversityChongqing 400044China National Engineering Research Center for Magnesium Alloys Chongqing 400044China

In general,different extrusion conditions will affect the microstructure of magnesium alloys and further determine the mechanical *** effects of extrusion parameters and heat treatment processes such as extrusion speed,pre-forging,annealing time,extrusion ratio and cooling rate on the microstructure,texture evolution and tensile properties of Mg-2Gd-0.3Zr alloys were investigated in this *** with the as-cast alloy,the extrusion process significantly refines the grains and exhibit the rare earth *** the increase of extrusion speed and annealing time,the growth of recrystallized grains is accelerated,leading to the increase of *** pre-forging deformation achieves to refine the grains by promoting recrystallization nucleation,resulting in increased strength of Mg-2Gd-0.3Zr *** the extrusion ratio or increasing the cooling rate will introduce coarse un-DRXed grains,which transformed the texture into the basal *** particular,the effect of rapid cooling on refining the recrystallized grains is also *** extrusion conditions influence the mechanical properties of the Mg-2Gd-0.3Zr alloy through the grain size,proportion of non-recrystallization region and texture type.

关键词： Mg-2Gd-0.3Zr alloy Extrusion conditions Microstructure Texture Mechanical properties

Atomically Dispersed Iron Active Sites Promoting Reversible Redox Kinetics and Suppressing Shuttle Effect in Aluminum-Sulfur Batteries

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Nano-Micro Letters 2022年第10期14卷 248-259页

作者： Fei Wang Min Jiang tianshuo zhao Pengyu Meng Jianmin Ren zhaohui Yang Jiao Zhang Chaopeng Fu Baode Sun School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Rechargeable aluminum-sulfur(Al-S)batteries have been considered as a highly potential energy storage system owing to the high theoretical capacity,good safety,abundant natural reserves,and low cost of Al and ***,the research progress of Al-S batteries is limited by the slow kinetics and shuttle effect of soluble polysulfides ***,an interconnected free-standing interlayer of iron sin-gle atoms supported on porous nitrogen-doped carbon nanofibers(FeSAs-NCF)on the separator is developed and used as both catalyst and chemical barrier for Al-S *** atomically dispersed iron active sites(Fe-N_(4))are clearly identified by aberration-corrected high-angle annular dark-field scanning transmission electron microscopy and X-ray absorption near-edge *** Al-S battery with the FeSAs-NCF shows an improved specific capacity of 780 mAh g^(−1)and enhanced cycle *** evidenced by experimental and theoretical results,the atomically dispersed iron active centers on the separator can chemically adsorb the polysulfides and accelerate reaction kinetics to inhibit the shuttle effect and promote the reversible conversion between aluminum polysulfides,thus improving the electrochemical performance of the Al-S *** work provides a new way that can not only promote the conversion of aluminum sulfides but also suppress the shuttle effect in Al-S batteries.

关键词： Fe single atom Aluminum-sulfur battery Catalysis Shuttle effect Separator modification

Highly uniform Co-Cu bimetallic sulfides for rechargeable alkaline aqueous zinc batteries

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Chinese Chemical Letters 2024年第2期35卷 521-526页

作者： Xiaofang Bai Yuwei zhao Mangwei Cui tianshuo Guo Zijie Tang Chuan Li Heng Gao Shuo Yang Lingzhi zhao Chunyi Zhi Hongfei Li Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Songshan Lake Materials Laboratory Dongguan 523808China Department of Materials Science and Engineering City University of Hong KongHong KongChina International Centre for Quantum and Molecular Structures Department of PhysicsShanghai UniversityShanghai 200444China Guangdong Provincial Engineering Technology Research Center for Low Carbon and Advanced Energy Materials Institute of Semiconductor Science and TechnologySouth China Normal UniversityGuangzhou 510631China

Rechargeable alkaline aqueous zinc batteries(RAZBs)have attracted increasing ***,most RAZBs are hindered by the limited availability of cathode *** practical electrochemical performance of most cathode materials is lower than the theoretical value due to their poor electrical conductivity and low utilization *** this work,we develop a facile hydrothermal procedure to prepare highly uniform bimetallic sulfides as novel cathode materials for ***-cobalt binary metallic oxides materials possess higher conductivity and larger capacity compared with their mono-metal oxides compounds due to bimetallic synergistic effects and multiple oxidation ***,bimetallic sulfide compounds have smaller bond energy and longer bond length than their oxides,leading to less structural damage,faster kinetics of electrochemical reactions,and better *** as-prepared Co-Cu bimetallic sulfides show enhanced electrochemical performance due to various valences of Co and Cu as well as the existence of *** a result,aqueous Zn/CuCo_(2)S_(4) battery shows a high specific capacity of 117.4 mAh/g at 4 A/g and a good cycle life of over 8000 *** on PANa hydrogel electrolytes,a flexible Zn/CuCo_(2)S_(4) battery demonstrates excellent cycling *** battery can also meet the requirements of electronic devices with different shapes and performs well in extreme environments,such as freezing,drilling,and *** work opens new avenues to obtain high-rate and long-life cathode materials for RAZBs by utilizing the synergistic effects of bimetallic sulfides and provides a new platform for flexible energy storage devices.

关键词： Aqueous zinc batteries Bimetallic sulfides Cathode materials Rate performance Cycling stability

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针刺法治疗肩袖损伤研究进展

中国中医药现代远程教育 2021年第6期19卷 200-202页

作者：赵天硕邰东旭辽宁中医药大学研究生学院辽宁沈阳110847 辽宁中医药大学附属医院骨伤二科辽宁沈阳110032

肩袖损伤是指由于因肩袖组织损伤出现肩关节疼痛、活动受限等一系列症状。治疗方法包括手术疗法与保守疗法,其中手术治疗费用较高且危险系数大,患者往往因症状较重且经保守治疗无效而采用手术疗法。保守治疗因其痛苦少、价格低、绿色、... 详细信息

肩袖损伤是指由于因肩袖组织损伤出现肩关节疼痛、活动受限等一系列症状。治疗方法包括手术疗法与保守疗法,其中手术治疗费用较高且危险系数大,患者往往因症状较重且经保守治疗无效而采用手术疗法。保守治疗因其痛苦少、价格低、绿色、对人体伤害小等深受广大患者喜爱。针刺是传统保守疗法中的重要组成部分,因其操作简便、易于掌握、能够快速、安全、有效地缓解患者疼痛、改善关节活动受限、提高生活质量,所以值得在临床大力推广。

关键词：痹证肩袖损伤针刺疗法研究进展综述

国内外儿童用联合疫苗免疫原性、安全性和社会价值

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中华流行病学杂志 2021年第5期42卷 948-954页

作者：刘翰谕魏霞赵天朔韩冰峰刘贝杨莉崔富强北京大学公共卫生学院 100191 北京大学医学部卫生政策与技术评估中心 100191

联合疫苗含有两种或多种抗原,研究认为接种联合疫苗后能预防多种疾病,同时可减少接种次数。本文对国内外儿童用联合疫苗,如无细胞百白破疫苗(DTaP)、麻疹-风疹-腮腺炎疫苗(MMR)等免疫原性和安全性进行综述,并从儿童家长、预防接种工作... 详细信息

联合疫苗含有两种或多种抗原,研究认为接种联合疫苗后能预防多种疾病,同时可减少接种次数。本文对国内外儿童用联合疫苗,如无细胞百白破疫苗(DTaP)、麻疹-风疹-腮腺炎疫苗(MMR)等免疫原性和安全性进行综述,并从儿童家长、预防接种工作者和卫生服务方面进行社会价值探究,为我国推动联合疫苗研发和使用提供决策证据。研究发现,联合疫苗对儿童、家长、预防接种工作者和卫生服务方面均产生较好的收益,能够保证其良好的免疫原性和安全性,增强家长的接种便利和经济性,提高预防接种工作者的工作效率,同时能弥补新发疫情对免疫服务造成的影响,提高接种覆盖率和及时率,增加社会收益。目前我国联合疫苗的推广受到技术瓶颈多,人群接种认知水平低等限制。建议加强联合疫苗安全性、有效性和卫生经济学等方面研究,科学评估联合疫苗的价值;增强公众对联合疫苗的认知和信任度;促进多联多价疫苗研发应用;政府应完善法规协助联合疫苗发展。

关键词：联合疫苗儿童免疫原性安全性价值

破伤风免疫制剂用于成人暴露后免疫的研究进展

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中华预防医学杂志 2022年第7期56卷 1004-1010页

作者：杜娟张仲松连昕瑶王学增谢明珠赵天朔卢庆彬吴疆北京大学公共卫生学院卫生检验学系疫苗评价中心北京100191 北京市疾病预防控制中心免疫预防所北京100050 北京市预防医学研究中心北京100050

我国已经成功消除了孕妇及新生儿破伤风,但目前成人含破伤风成分疫苗接种覆盖率仍较低,发生破伤风感染的危险不容忽视。为了解破伤风对人类的威胁以及现阶段破伤风免疫制剂用于成人暴露后免疫的情况,本研究对国内外破伤风的发病情况、... 详细信息

我国已经成功消除了孕妇及新生儿破伤风,但目前成人含破伤风成分疫苗接种覆盖率仍较低,发生破伤风感染的危险不容忽视。为了解破伤风对人类的威胁以及现阶段破伤风免疫制剂用于成人暴露后免疫的情况,本研究对国内外破伤风的发病情况、破伤风免疫制剂的接种现状和暴露后免疫建议等进行综述和梳理,从而为破伤风免疫制剂的暴露后免疫程序和使用规范提供科学支撑。

关键词：破伤风破伤风免疫制剂暴露后免疫