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CoS_(2)/N,S co-doped mesoporous carbon with 3D micro-nano crosslinked structure as efficient bifunctional oxygen electrocatalysts for zinc-air batteries

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Chinese Chemical Letters 2023年第5期34卷 604-609页

作者： Wei Wang Liqin Li Jie Ouyang Jialin Gong Jie Tian Liang Chen Junlin Huang Binhong He Zhaohui Hou Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials School of Chemistry and Chemical EngineeringHunan Institute of Science and TechnologyYueyang 414006China Guangxi Key Laboratory of Low Energy Material Guangxi Normal UniversityGuilin 541004China Hubei Key Laboratory of Pollutant Analysis&Reuse Technology Hubei Normal UniversityHuangshi 435002China Hunan Province Key Laboratory of Materials Surface&Interface Science and Technology Material Science and Engineering SchoolCentral South University of Forestry and TechnologyChangsha 410004China

This work describes a bifunctional oxygen catalyst made of cobalt disulfide encapsulated in N,S codoped mesoporous carbon with a novel three-dimensional micro-nano crosslinking *** proposed composite materials exhibit promising oxygen electrocatalytic activity and *** composite assembled rechargeable zinc-air battery can achieve a high power density of 208.9 m W/cm^(2),and can be stably cycled for more than 160 ***,the all-solid zinc-air battery assembled with the electrocatalyst also performs *** micro-nano crosslinking and high porosity structure,as well as the large number of active sites generated by the synergy of N,S doping and the close interface between carbon matrix and CoS_(2),contribute to the composite's exceptional electrochemical *** study's rational strategy lays the path for the development of other high-performance bifunctional electrocatalysts.

关键词： Micro-nano crosslinked CoS_2 ORR OER Zn-air battery

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A highly efficient method for genomic deletion across diverse lengths in thermophilic Parageobacillus thermoglucosidasius

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Synthetic and Systems Biotechnology 2024年第4期9卷 658-666页

作者： Zhiheng Yang Bixiao Li Ruihong Bu Zhengduo Wang Zhenguo Xin Zilong Li Lixin Zhang Weishan Wang State Key Laboratory of Bioreactor Engineering School of BiotechnologyEast China University of Science and Technology(ECUST)200237ShanghaiChina Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Key Laboratory of Cluster ScienceMinistry of EducationFrontiers Science Center for High Energy MaterialAdvanced Research Institute of Multidisciplinary ScienceSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing100081China State Key Laboratory of Microbial Resources Institute of MicrobiologyChinese Academy of SciencesBeijing100101China

Parageobacillus thermoglucosidasius is emerging as a highly promising thermophilic organism for metabolic *** utilization of CRISPR-Cas technologies has facilitated programmable genetic manipulation in ***,the absence of thermostable NHEJ enzymes limited the capability of the endogenous type I CRISPR-Cas system to generate a variety of extensive genomic ***,two thermophilic NHEJ enzymes were identified and combined with the endogenous type I CRISPR-Cas system to develop a genetic manipulation tool that can achieve long-range genomic deletion across various *** optimizing this tool—through adjusting the expression level of NHEJ enzymes and leveraging our discovery of a negative correlation between GC content of the guide RNA(gRNA)and deletion efficacy—we streamlined a comprehensive gRNA selection manual for whole-genome editing,achieving a 100%success rate in randomly selecting ***,using just one gRNA,we achieved genomic deletions spanning diverse length,exceeding 200 *** tool will facilitate the genomic manipulation of *** for both fundamental research and applied engineering studies,further unlocking its potential as a thermophilic cell factory.

关键词： Type I CRISPR system Thermostable NHEJ enzymes Thermophile Long-range genomic deletions

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Atomically dispersed dual Fe centers on nitrogen-doped bamboo-like carbon nanotubes for efficient oxygen reduction

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Nano Research 2022年第3期15卷 1966-1972页

作者： Ligang Ma Junlin Li Zhiwei Zhang Hao Yang Xueqin Mu Xiangyao Gu Huihui Jin Ding Chen Senlin Yan Suli Liu Shichun Mu School of Electronic Engineering Nanjing Xiaozhuang UniversityNanjing 211171China Nanjing Key Laboratory of Optometric Materials and Technology Jinling Institute of TechnologyNanjing 211169China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Key Laboratory of Advanced Functional Materials of Nanjing Nanjing Xiaozhuang UniversityNanjing 211171China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China

Interfacial atomic configuration between dual-metal active species and nitrogen-carbon substrates is of great importance for improving the intrinsic activity of catalysts toward oxygen reduction reaction(ORR).Thus,from the atomic-scale engineering we develop a high intrinsic activity ORR catalyst in terms of incorporating atomically dispersed dual Fe centers(single Fe atoms and ultra-small Fe atomic clusters)into bamboo-like N-doped carbon *** from atomically dispersed dual-Fe centers on the atomic interface of Fe-Nx/carbon nanotubes,the fabricated dual Fe centers catalyst exhibits an extremely high ORR activity(E_(onset)=1.006 V;E_(1/2)=0.90 V),beyond state-of-the-art Pt/***,this catalyst also shows a superior kinetic current density of 19.690 mA·cm^(−2),which is 7 times that of state-of-the-art Pt/***,based on the excellent catalyst,the primary Zn-air battery reveals a high power density up to 137 mW·cm^(−2) and sufficient potential cycling stability(at least 25 h).Undoubtedly,given the unique structure–activity relationship of dual-Fe active species and metal-nitrogen-carbon substrates,the catalyst will show great prospects in highly efficient electrochemical energy conversion devices.

关键词： atomic configuration single Fe atoms atomically dispersed Fe clusters N-doped bamboo-like carbon nanotubes oxygen reduction reaction

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Achieving strength-ductility synergy in a non-equiatomic Cr_(10)Co_(30)Fe_(30)Ni_(30)high-entropy alloy with heterogeneous grain structures

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Rare Metals 2022年第8期41卷 2864-2876页

作者： Chen-Liang Chu Wei-Ping Chen Jun-Chen Liu Qiang Chen Zhi-Qiang Fu Guangdong Key Laboratory for Advanced Metallic Materials Processing South China University of TechnologyGuangzhou510641China Southwest Technology and Engineering Research Institute Chongqing400039China

Cold rolling and post-deformation annealing(PDA)heat treatments were used to produce heterogeneous grain structures(HGS)in a single-phase face-centered cubic(fcc)Cr_(10)Co_(30)Fe_(30)Ni_(30)high-entropy alloy(HEA).The microstructural evolution and microstructure-property relationship of the HEA were systematically studied under different *** could be achieved in PDA-treated samples at 875℃for 20 s and at 900℃for 20 s(PDA-900-20 s).PDA-900-20 s sample exhibits the most excellent combination of strength and ductility,showing a tensile yield strength of~590 MPa,an ultimate strength of~706 MPa and a total elongation of~23.9%.Additionally,compared with the homogenized counterpart exhibiting homogenous grains,PDA-900-20 s sample displays a notable increment of~413%in yield strength and simultaneously maintains a good *** dominated strengthening mechanisms in PDA-900-20 s sample are grain-boundary strengthening and heterogeneous deformation-induced(HDI)strengthening,whereas the good ductility is mainly resulted from the HDI ***,the present study provides an effective and simple pathway to overcome the strength-ductility tradeoff of typical fcc HEAs through heterogeneous microstructure.

关键词： High-entropy alloy Heterogeneous grain structures Hetero-deformation-induced hardening Mechanical properties Strengthening mechanism

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Layer stacked SiO_(x) microparticle with disconnected interstices enables stable interphase and particle integrity for lithium-ion batteries

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Journal of Energy Chemistry 2023年第11期86卷 300-307,I0007页

作者： Yang Ren Xucai Yin Lizhi Xiang Rang Xiao Hua Huo Geping Yin Chunyu Du MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage and Institute of Advanced Chemical Power Sources School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004GuangxiChina

Severe mechanical fractu re and unstable interphase,associated with the large volumetric expansion/contraction,significantly hinder the application of high-capacity SiO_(x)materials in lithium-ion ***,we report the design and facile synthesis of a layer stacked SiO_(x)microparticle(LS-SiO_(x))material,which presents a stacking structure of SiO_(x)layers with abundant disconnected *** LS-SiO_(x)microparticle can effectively accommodate the volume expansion,while ensuring negligible particle *** importantly,the interstices within SiO_(x)microparticle are disconnected from each other,which efficiently prevent the electrolyte from infiltration into the interior,achieving stable electrode/-electrolyte ***,the LS-SiO_(x)material without any coating delivers ultrahigh average Coulombic efficiency,outstanding cycling stability,and full-cell *** 6 cycles can attain>99.92%Coulombic efficiency and the capacity retention at 0.05 A g^(-1)for 100 cycles exceeds99%.After 800 cycles at 1 A g^(-1),the thickness swelling of LS-SiO_(x)electrode is as low as 0.87%.Moreover,the full cell with pure LS-SiO_(x)anode exhibits capacity retention of 91.2%after 300 cycles at 0.2 *** work provides a novel concept and effective approach to rationally design silicon-based and other electrode materials with huge volume variation for electrochemical energy storage applications.

关键词： Lithium-ion batteries Silicon oxide Layer stacked structure Disconnected interstices Coulombic efficiency

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Salt reduction strategies and enhanced saltiness perception mechanisms for prepared dishes: A review

Food Safety and Health

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Food Safety and Health 2024年第3期2卷 362-379页

作者： Lan, Haijing Chen, Lei College of Food Science and Technology Guangdong Ocean University Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety Guangdong Province Engineering Laboratory for Marine Biological Products Guangdong Provincial Engineering Technology Research Center of Seafood Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution Zhanjiang China

Healthy prepared dishes are receiving increasing attention, with high salt content being their prominent feature, and a long-term high sodium diet may lead to various diseases. At present, replacing NaCl with non-sodium salts has become the main salt reduction method, but these substitutes will bring adverse flavors to the product, and excessive use of KCl will also affect health. Therefore, the study of flavor peptides combined with new green technologies is a potentially effective strategy to reduce salt without reducing saltiness. This article reviews the current salt reduction strategies, the effects of food matrix, basic amino acids, other tastes and odors on saltiness, and the relationship between saltiness and receptor structure and transduction mechanism. In addition, the saltiness assessment methods were introduced, and the current challenges faced by the strategy of reducing salt without reducing saltiness were discussed. The preparation of salty peptides and salty enhancing peptides from natural foods and the combination of them with new green technologies may be an effective method for salt reduction in the food industry. This review can provide theoretical reference for the prepared dishes industry to reduce salt without reducing saltiness. © 2024 The Authors. Food Safety and Health published by John Wiley & Sons Australia, Ltd on behalf of International Association of Dietetic Nutrition and Safety.

关键词： evaluation method prepared dishes saltiness receptor salty enhancing peptides salty peptides

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Effect of grain size on mechanical properties and tribological behavior of size-tunable high entropy diboride ceramics obtained by two-step SPS sintering

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Journal of advanced Ceramics 2024年第11期13卷 1835-1843页

作者： Yao Yang Jianqiang Bi Linjing Qiao Guandong Liang Shuyong Liang Shushuai Liu Shaoyin Wang Hongyu Gong Zhao Qian Jinwang Shi Weiqiang Li Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials Ministry of EducationShandong UniversityJinan 250061China School of Materials Science and Engineering Shandong UniversityJinan 250061China Shandong Huamei New Material Technology Co. Ltd.Weifang 261200China

High-entropy diboride(HEB)ceramics constitute a novel class of ultrahigh-temperature ceramics that are appealing for applications in extreme *** relative density and grain size play important roles in tailoring the mechanical properties and wear resistance of HEBs,affecting their applications,such as high-temperature structural parts and thermal protection *** this study,highly dense(HfZrTaVNb)B_(2) ceramics with size-tunable microstructures were successfully synthesized by spark plasma sintering combined with an ingenious two-step *** effects of grain size on the mechanical properties and wear resistance of(HfZrTaVNb)B_(2) ceramics were comprehensively *** results indicated that the smaller grain size led to higher hardness and fracture toughness,and the relationship between hardness and grain size fitted the Hall–Petch equation *** particular,the sample featuring a grain size of 1.64µm and 97.6%density had the highest hardness and fracture toughness,26.7 GPa and 4.6 MPa·m^(1/2),***,it also demonstrated optimal wear resistance,displaying a minimal wear rate of only 2.53×10^(−6) mm^(3)/(N·m)under a 20 N *** analysis revealed that the primary wear mechanism observed in(HfZrTaVNb)B_(2) was oxidative wear under a 5 N *** a 10 N load,the wear mechanism comprised both oxidative and fracture *** wear mechanism became more complex and involved oxidation wear,fracture wear,abrasive wear,and fatigue wear at a 20 N load.

关键词： high-entropy diborides(HEBs) two-step sintering mechanical properties tribology microstructure regulation

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Degradation behavior of ZE21C magnesium alloy suture anchors and their effect on ligament-bone junction repair

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Bioactive materials 2023年第8期26卷 128-141页

作者： Delin Ma Jun Wang Mingran Zheng Yuan Zhang Junfei Huang Wenxiang Li Yiwen Ding Yunhao Zhang Shijie Zhu Liguo Wang Xiaochao Wu Shaokang Guan School of Material Science and Engineering Zhengzhou UniversityZhengzhou450001China Henan Key Laboratory of Advanced Magnesium Alloys Zhengzhou450002China Key Laboratory of Advanced Materials Processing&Mold Ministry of EducationZhengzhou450002China Shimadzu(China)Co. LtdShenzhen BranchShenzhen528042China Zhengzhou Orthopedic Hospital Zhengzhou450053China

Current materials comprising suture anchors used to reconstruct ligament-bone junctions still have limitation in biocompatibility,degradability or mechanical *** alloys are potential bone implant materials,and Mg^(2+) has been shown to promote ligament-bone ***,we used Mg-2 wt.%Zn-0.5 wt.%Y-1 wt.%Nd-0.5 wt.%Zr(ZE21C)alloy and Ti6Al4V(TC4)alloy to prepare suture anchors to reconstruct the patellar ligament-tibia in SD *** studied the degradation behavior of the ZE21C suture anchor via in vitro and in vivo experiments and assessed its reparative effect on the ligament-bone *** vitro,the ZE21C suture anchor degraded gradually,and calcium and phosphorus products accumulated on its surface during *** vivo,the ZE21C suture anchor could maintain its mechanical integrity within 12 weeks of implantation in *** tail of the ZE21C suture anchor in high stress concentration degraded rapidly during the early implantation stage(0-4weeks),while bone healing accelerated the degradation of the anchor head in the late implantation stage(4-12weeks).Radiological,histological,and biomechanical assays indicated that the ZE21C suture anchor promoted bone healing above the suture anchor and fibrocartilaginous interface regeneration in the ligament-bone junction,leading to better biomechanical strength than the TC4 ***,this study provides a basis for further research on the clinical application of degradable magnesium alloy suture anchors.

关键词： ZE21C Suture anchor Degradation behavior Reparative effect Ligament-bone junction

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Atomically dispersed Ni electrocatalyst for superior urea-assisted water splitting

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Journal of Energy Chemistry 2024年第3期90卷 1-6,I0002页

作者： Fang Luo Shuyuan Pan Yuhua Xie Chen Li Yingjie Yu Zehui Yang College of Materials Science and Engineering State Key Laboratory of New Textile Materials&Advanced Processing TechnologyWuhan Textile UniversityWuhan 430200China Hubei Hydrogen Energy Technology Innovation Center Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074HubeiChina

Urea oxidation reaction(UOR) has been selected as substitution for oxygen evolution reaction ascribing to its low thermodynamic voltage as well as utilization of nickel as ***,we report the formation of nickel single atoms(Ni-SAs) as exceptional bifunctional electrocatalyst toward UOR and hydrogen evolution reaction(HER) in urea-assisted water *** UOR catalysis,Ni-SAs perform a superior catalytic performance than Ni-NP/NC and Pt/C ascribing to the formation of HOO-Ni-N_(4) structure evidenced by in-situ Raman spectroscopy,corresponding to a boosted mass activity by 175-fold at 1.4 V *** than Ni-NP/***,Ni-SAs requires only 450 mV overpotential to obtain HER current density of 500 mA cm^(-2).136 mA cm^(-2) is achieved in urea-assisted water splitting at1.7 V for Ni-SAs,boosted by 5.7 times than Pt/C-IrO_(2) driven water splitting.

关键词： Urea oxidation reaction Hydrogen evolution reaction Nickel single atoms Water splitting

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Spin switching in corrole radical complex

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Chinese Chemical Letters 2024年第1期35卷 1-2页

作者： Chunyan Yu Hongping Xiao Hua Lu Yongshu Xie College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material Technology of Ministry of EducationHangzhou Normal UniversityHangzhou 311121China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325035China Functional Materials Chemistry Key Laboratory for Advanced Materials and Institute of Fine ChemicalsSchool of Chemistry&Molecular EngineeringEast China University of Science&TechnologyShanghai 200237China

Spintronics is a cutting-edge field of developing new electronic devices by manipulating the electron spin and magnetic moment[1].Traditional spintronic research mainly focuses on transition metals and inorganic semiconductors,while organic molecules have the advantage of being extremely easy to realize efficient spin control by modifying the specific external conditions for desired electronic structures and magnetic ***,as a ring-contracted porphyrin,is the aromatic analog of the central macrocycle of vitamin *** has a squeezed inner cavity and three inner NHs in its free-base form,making it easier to stabilize high-valent metal ions and thus a promising candidate in spintronics.

关键词： Corrole inner radical

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