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Enhanced hydrogen evolution performance by 3D ordered macroporous Ru-CoP@NC electrocatalysts

Rare Metals 2024年第3期43卷 1095-1107页

作者： chen-chen Zhang Sheng Wei li-Xian Sun Yi-Fang Ouyang Fen Xu Hai-liang Chu Hong-GePan li-xin chen Xue-Zhang Xiao School of Material Science and Engineering Guilin University of Electronic TechnologyGuilin541004China School of Chemistry and Chemical Engineering Guangxi UniversityNanning530004China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen518055GuangdongChina Institute of Science and Technology for New Energy Xi'an Technological UniversityXi'an710021China School of Materials Science and Engineering Zhejiang UniversityHangzhou310058China

Electrocatalytic water splitting coupled with sustainable energies is identified as an environmentally friendly and renewable strategy to generate high-quality hydrogen for the fuel cells.However,the main challenge is to develop high performance,low cost and chemically stable electrocatalysts to decline the energy barriers and enhance the sluggish kinetics of hydrogen evolution reaction(HER).Herein,a three-dimensional hierarchically ordered macroporous Ru-CoP@NC electrocatalyst(3DOM Ru-CoP@NC)derived from ordered macro-microporous metal-organic frameworks has been prepared using the precursor@template and double-solvent methods.The prepared 3DOM Ru-CoP@NC catalyst exhibits an overpotential of 15 mV(j=10 mA·cm^(-2))and a reaction Tafel slope of 38 mV·dec^(-1)in alkaline electrolyte,which are superior to commercial Pt@C catalyst.Additionally,the overpotential and reaction Tafel slope of this catalyst in acidic media are 45 mV and 50 mV·dec^(-1),respectively.The outstanding HER activities of 3DOM Ru-CoP@NC catalysts are ascribed to the 3D highly interconnectedreticular nanospaces that can increase effective reaction active sites.The N dope d carbon framework improves the electronic properties and conductivity.Moreover,the strong interaction of Ru and CoP nanoparticles also boosts the HER process.These results indicate that 3DOM Ru-CoP@NC catalysts with high catalytic activities have a broad application prospect in the future.

关键词： Hydrogen evolution reaction Template method 3D ordered macroporous Ru-CoP@NC

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Optimizing FeCoNiCrTi high-entropy alloy with hydrogen pumping effect to boost de/hydrogenation performance of magnesium hydride

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Rare Metals 2024年第7期43卷 3273-3285页

作者： Meng-chen Song Fu-Ying Wu Yi-Qun Jiang Xiu-Zhen Wang Hu Zhao li-xin chen liu-Ting Zhang School of Energy and Power Instrumental Analysis CenterJiangsu University of Science and Technology Max Planck Institute for Iron Research School of Mechanical and Aerospace Engineering Nanyang Technological University State Key Laboratory of Silicon Materials Department of Materials Science and EngineeringZhejiang University

The exploration of efficient,long-lived and cost-effective transition metal catalysts is highly desirable for the practical hydrogen storage of magnesium hydride（MgH2） in sustainable energy devices.Herein,FeCoNiCrTi high-entropy alloy（HEA） nanosheets were prepared via a facile wet chemical ball milling strategy and they were introduced into MgH2to boost the hydrogen storage performance.The refined HEA exhibited superior catalytic activity on MgH2.In contrast to additive-free MgH2,the initial desorption temperature of the constructed MgH2-HEA composite was reduced from 330.0 to 198.5℃ and a remarkable 51% reduction in the dehydrogenation activation energy was achieved.Besides,the MgH2-HEA composite only required one-twentieth time of that consumed by pure MgH2to absorb 5.0 wt% of H2at 225℃.The synergy between the "hydrogen pumping" effect of Mg2Ni/Mg2NiH4and Mg2Co/Mg2CoH5couples,as well as the good dispersion of Fe,Cr and Ti on the surface of MgH2contributed to the enhanced de/hydrogenation performance of the MgH2-HEA composites.This study furnishes important steering for the design and fabrication of multiple transition metal catalysts and may push the commercial application of magnesium-based hydrides one step forward.

关键词： Hydrogen storage Magnesium hydride High-entropy alloys Catalysis

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Deep insight of unique phase transition behaviors and mechanism in Zr_(2)Co-H isotope system with ultra-low equilibrium pressure

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Rare Metals 2024年第1期43卷 212-224页

作者： Yang liu Pan-Pan Zhou Xue-Zhang Xiao Jia-cheng Qi Jia-Peng Bi Tiao Ying xing-Wen Feng Yan Shi Wen-Hua Luo li-xin chen State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Institute of Materials China Academy of Engineering PhysicsMianyang 621907China Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province Hangzhou 310013China

Efficient capture,safe storage and release of tritium from the international thermonuclear experimental reactor(ITER) reaction exhaust gas is a perplexing problem,and the development of an efficient tritium-getter material with ultra-low hydrogenation equilibrium pressure is considered as a reliable way.In this work,Zr_(2)Co alloy was selected as a tritium-getter material and prepared through induction levitation melting.Fundamental performance test results show that Zr_(2)Co exhibits an ultra-low hydrogenation equilibrium pressure of 3.22 × 10^(-6) Pa at 25℃ and excellent hydriding kinetics under a low hydrogen pressure of 0.005 MPa.Interestingly,unique phase transition behaviors were presented in Zr_(2)Co-H system.Specifically,Zr_(2)CoH_(5) formed by Zr_(2)Co hydrogenated at room temperature is initially decomposed into ZrH_(2) and ZrCoH_(3) at200 ℃.With the temperature increasing to 350 ℃,ZrCoH_(3)is dehydrogenated to ZrCo,and then ZrCo further reacts with ZrH_(2) at 650 ℃ to reform Zr_(2)Co and hydrogen.Among the staged phase transition pathways during dehydrogenation,the decomposition of Zr_(2)CoH_(5) occurs preferentially,which is well accordance with both the smallest reaction energy barrier and the maximum reaction spontaneity that are determined respectively from kinetics activation energy and thermodynamics Gibbs free energy.Furthermore,first principles calculation results indicate that the stronger binding of hydrogen in interstitial environments of ZrCoH_(3)and ZrH_(2) triggers the hydrogen-stabilized phase transformation of Zr_(2)CoH_(5).The unique phase transition mechanisms in Zr_(2)Co-H system can shed light on the further exploration and regulation of analogous staged phase transition of hydrogen storage materials.

关键词： Zr_(2)Co alloy Tritium-getter materials Ultralow equilibrium hydrogen pressure Phase transition mechanism

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Resolvin D1 Induces mTOR-independent and ATG5-dependent Autophagy in BV-2 Microglial Cells

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Current Medical Science 2023年第6期43卷 1096-1106页

作者： Shang-wen PAN li-sha HU Han WANG Rui-ting li Ya-jun HE You SHANG Zhong-liang DAI li-xin chen Wei XIONG Department of Critical Care Medicine Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China Department of Anesthesiology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China Department of Anesthesiology Qingdao Women and Children’s HospitalQingdao UniversityQingdao266034China Department of Anesthesiology The Second Clinical Medical College(Shenzhen People’s Hospital)Jinan UniversityShenzhen518020China Department of Pharmacology Medical CollegeJinan UniversityGuangzhou510632China Integrated Chinese and Western Medicine Postdoctoral Research Station Jinan UniversityGuangzhou510632China

Objective The activation state of microglia is known to occupy a central position in the pathophysiological process of cerebral inflammation.Autophagy is a catabolic process responsible for maintaining cellular homeostasis.In recent years,autophagy has been demonstrated to play an important role in neuroinflammation.Resolvin D1(RvD1)is a promising therapeutic mediator that has been shown to exert substantial anti-inflammatory and proresolving activities.However,whether RvD1-mediated resolution of inflammation in microglia is related to autophagy regulation needs further investigation.The present study aimed to explore the effect of RvD1 on microglial autophagy and its corresponding pathways.Methods Mouse microglial cells(BV-2)were cultured,treated with RvD1,and examined by Western blotting,confocal immunofluorescence microscopy,transmission electron microscopy,and flow cytometry.Results RvD1 promoted autophagy in both BV-2 cells and mouse primary microglia by favoring the maturation of autophagosomes and their fusion with lysosomes.Importantly,RvD1 had no significant effect on the activation of mammalian target of rapamycin(mTOR)signaling.Furthermore,RvD1-induced mTOR-independent autophagy was confirmed by observing reduced cytoplasmic calcium levels and suppressed calcium/calmodulin-dependent protein kinase II(CaMK II)activation.Moreover,by downregulating ATG5,the increased phagocytic activity induced by RvD1 was demonstrated to be tightly controlled by ATG5-dependent autophagy.Conclusion The present work identified a previously unreported mechanism responsible for the role of RvD1 in microglial autophagy,highlighting its therapeutic potential against neuroinflammation.

关键词： resolvin D1 microglia mTOR-independent autophagy ATG5-dependent autophagy phagocytosis

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Development of Ti_(0.85)Zr_(0.17)(Cr-Mn-V)_(1.3)Fe_(0.7)-based Laves phase alloys for thermal hydrogen compression at mild operating temperatures

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Rare Metals 2022年第8期41卷 2588-2594页

作者： Zi-Ming Cao Pan-Pan Zhou Xue-Zhang Xiao liu-Jun Zhan Zhi-Fei Jiang Shu-Mao Wang li-Jun Jiang li-xin chen State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China Department of Materials Science and Engineering The University of ManchesterManchesterM139PLUK Institute of Energy Materials and Technology General Research Institute for Non-ferrous MetalsBeijing100088China Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province Hangzhou310013China

Metal hydride with proper hydrogen storage properties is the key component of hydride thermal hydrogen compressor.In this work,Ti_(0.85)Zr_(0.17)(Cr-Mn-V)_(1.3)Fe_(0.7)-based alloys were developed to achieve thermal hydrogen compression at mild operating temperatures of water bath.The results indicate the single C 14-type Laves phase as well as homogeneously distributed elements of all alloys.With increased Mn content in Ti_(0.85)Zr_(0.17)Cr_(1.2-x)Mn_xFe_(0.7)V_(0.1)(x=0,0.1,0.2,0.3)alloys.

关键词： alloys hydrogen Laves

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Chloride channels are involved in sperm motility and are downregulated in spermatozoa from patients with asthenozoospermia

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Asian Journal of Andrology 2017年第4期19卷 418-424页

作者： Shan-Wen liu Yuan li li-li Zou Yu-Tao Guan Shuang Peng li-xin Zheng Shun-Mei Deng lin-Yan Zhu li-Wei Wang li-xin chen Department of Pharmacology Medical College Jinan University Guangzhou China Department of Pathology and Pathophysiology Medical College Jinan University Guangzhou China Department of Physiology Medical College Jinan University Guangzhou China Male Reproductive Center Family Planning Special Hospital of Guangdong Guangzhou China

Human spermatozoa encounter an osmotic decrease from 330 to 290 mOsm I-z when passing through the female reproductive tract. We aimed to evaluate the role of chloride channels in volume regulation and sperm motility from patients with asthenozoospermia. Spermatozoa were purified using Percoll density gradients. Sperm volume was measured as the forward scatter signal using flow cytometry. Sperm motility was analyzed using computer-aided sperm analysis （CASA）. When transferred from an isotonic solution （330 mOsm I-z） to a hypotonic solution （290 mOsm I-Z）, cell volume was not changed in spermatozoa from normozoospermic men; but increased in those from asthenozoospermic samples. The addition of the chloride channel blockers, 4,4＇-diisothiocyanatostilbene-2,2＇- isulfonic acid （DIDS） or 5-nitro-2-（3-phenylpropylamino） benzoic acid （NPPB） to the hypotonic solution caused the normal spermatozoa to swell but did not increase the volume of those from the asthenozoospermic semen. DIDS and NPPB decreased sperm motility in both sets of semen samples. The inhibitory effect of NPPB on normal sperm motility was much stronger than on spermatozoa from the asthenozoospermic samples. Both sperm types expressed CIC-3 chloride channels, but the expression levels in the asthenozoospermic samples were much lower, especially in the neck and mid-piece areas. Spermatozoa from men with asthenozoospermia demonstrated lower volume regulating capacity, mobility, and CIC-3 expression levels （especially in the neck） than did normal spermatozoa. Thus, chloride channels play important roles in the regulation of sperm volume and motility and are downregulated in cases of asthenozoospermia.

关键词： asthenozoospermia chloride channels CIC-3 sperm motility volume regulation

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Synthesis of nanoscale CeAl4 and its high catalytic efficiency for hydrogen storage of sodium alanate

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Rare Metals 2017年第2期36卷 77-85页

作者： Jian Sun Xue-Zhang Xiao Ze-Jun Zheng Xiu-lin Fan chen-chen Xu Lang-Xia liu Shou-Quan li li-xin chen State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang ProvinceSchool of Materials Science and EngineeringZhejiang UniversityHangzhon 310027China

Nanoscale CeAl4 was directly synthesized by the thermal reaction between CeH2 and nano-aluminum at300℃.Then nano CeAl4-doped sodium alanate（NaAlH4）was synthesized by ball milling NaH/Al with 0.04CeAl4under hydrogen atmosphere at room temperature,and the catalytic efficiency of nanoscale CeAl4 for hydrogen storage of NaAlH4 was systematically investigated.It is shown that CeAl4 can effectively improve the dehydrogenation properties of sodium alanate system.The 0.04CeAl4-doped NaAlH4 system starts to release hydrogen below 80℃,completes dehydrogenation within 10 min at 170℃,and exhibits good cycling de/hydrogenation kinetics at relatively lower temperature（100-140℃）.Apparent activation energy of the dehydrogenation of NaAlH4 can be effectively reduced by addition of CeAl4,resulting in the decrease in desorption temperatures.Moreover,by analyzing the reaction kinetics of nano CeAl4-doped NaAlH4sample,both of the decomposition steps are conformed to a two-dimensional phase-boundary growth mechanism.The mechanistic investigations gained here can help to understand the de-/rehydrogenation behaviors of catalyzed complex metal hydride systems.

关键词： Complex hydride NaAlH4 Nanoscale CeAl4 Hydrogen storage Catalytic mechanism

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Rapid Detection of Acetylbritannilactone from Inula britannica in Plasma of Rats by Online Sweeping-Micellar Electrokinetic Chromatography

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Chinese Herbal Medicines 2014年第1期6卷 53-57页

作者： Jing-shan Zhao li-xin chen Ya-lei liu Ai-ying li Department of Biochemistry and Biology Institute of Basic Medicine Science Hebei University of Traditional Chinese Medicine Key Laboratory for Medical Biotechnology of Hebei Province Hebei Medical University Shijiazhuang Pharmaceutical Group

Objective To establish a rapid method for detecting acetylbritannilactone （ABL） by online sweeping-micellar electrokinetic chromatography （MEKC） and to elevate the sensitivity of the detection. Methods The combination of online sweeping technique with MEKC was used to determine the content of ABL in the extract of Inula britannica in plasma of rats. Results ABL was completely separated within 15 min in running buffer and sample buffer. The optimal conditions were as follows： on uncoated fused quartz silica capillary, with separation voltage of 23 kV, capillary temperature of 25 oC, and detection wavelength of 195 nm. The regression equations revealed good linear relationships between the peak area and concentration of ABL （r = 0.998）, with the detection limits of 0.005-0.15 mg/mL. The relative standard deviations of migration time and peak areas for intra- and inter-batch were 〈 2.45% and 〈 2.26%, respectively. The recovery rate of this method was 96.3~97.2%. Conclusion This method provides some advantages in separation speed, testing sensitivity, and operating convenience, with low sample and reagent consumption. The online sweeping-MEKC is an effective method for pharmacokinetic study and analysis on tracing biological samples.

关键词： 1-O-acetylbritannilactone Inula britannica online sweeping-micellar electrokineticchromatography sesquiterpene lactone

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Upgraded durian genome reveals the role of chromosome reshuffling during ancestral karyotype evolution,lignin biosynthesis regulation,and stress tolerance

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Science China(life Sciences) 2024年第6期67卷 1266-1279页

作者： Wanwan li xin chen Jianing Yu Yuxian Zhu College of life Sciences Shaanxi Normal UniversityXi’an 710119China The State Key Laboratory of Protein and Gene Research College of Life SciencesPeking UniversityBeijing 100871China The Institute for Advanced Studies Wuhan UniversityWuhan 430072China

Durian(Durio zibethinus)is a tropical fruit that has a unique flavor and aroma.It occupies a significant phylogenetic position within the Malvaceae family.Extant core-eudicot plants are reported to share seven ancestral karyotypes that have undergone reshuffling,resulting in an abundant genomic diversity.However,the ancestral karyotypes of the Malvaceae family,as well as the evolution trajectory leading to the28 chromosomes in durian,remain poorly understood.Here,we report the high-quality assembly of the durian genome with comprehensive comparative genomic analyses.By analyzing the collinear blocks between cacao and durian,we inferred 11 Malvaceae ancestral karyotypes.These blocks were present in a single-copy form in cacao and mainly in triplicates in durian,possibly resulting from a recent whole genome triplication(WGT)event that led to hexaploidization of the durian genome around 20(17–24)million years ago.A large proportion of the duplicated genes in durian,such as those involved in the lignin biosynthesis module for phenylpropane biosynthesis,are derived directly from whole genome duplication,which makes it an important force in reshaping its genomic architecture.Transcriptome studies have revealed that genes involved in feruloyl-Co A formations were highly preferentially expressed in fruit peels,indicating that the thorns produced on durian fruit may comprise guaiacyl and syringyl lignins.Among all the analyzed transcription factors(TFs),members of the heat shock factor family(HSF)were the most significantly upregulated under heat stress.All subfamilies of genes encoding heat shock proteins(HSPs)in the durian genome appear to have undergone expansion.The potential interactions between HSF Dzi05.397 and HSPs were examined and experimentally verified.Our study provides a high-quality durian genome and reveals the reshuffling mechanism of ancestral Malvaceae chromosomes to produce the durian genome.We also provide insights into the mechanism underlying lignin biosynthesis and heat stress tolerance.

关键词： Durio zibethinus whole genome duplication whole genome triplication Malvaceae ancestral karyotypes chromosome reshuffling lignin biosynthesis heat stress

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Atomically Dispersed Ruthenium Catalysts with Open Hollow Structure for lithium-Oxygen Batteries

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Nano-Micro Letters 2024年第2期16卷 154-164页

作者： xin chen Yu Zhang Chang chen Huinan li Yuran lin Ke Yu Caiyun Nan chen chen Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Solid State ChemistryUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China Engineering Research Center of Advanced Rare Earth Materials Department of ChemistryTsinghua UniversityBeijing 100084People’s Republic of China Beijing Key Laboratory of Energy Conversion and Storage Materials Institution College of ChemistryBeijing Normal UniversityBeijing 100875People’s Republic of China

lithium–oxygen battery with ultrahigh theoretical energy density is considered a highly competitive next-generation energy storage device,but its practical application is severely hindered by issues such as difficult decomposition of discharge products at present.Here,we have developed N-doped carbon anchored atomically dispersed Ru sites cathode catalyst with open hollow structure(h-RuNC)for lithium–oxygen battery.On one hand,the abundance of atomically dispersed Ru sites can effectively catalyze the formation and decomposition of discharge products,thereby greatly enhancing the redox kinetics.On the other hand,the open hollow structure not only enhances the mass activity of atomically dispersed Ru sites but also improves the diffusion efficiency of catalytic molecules.Therefore,the excellent activity from atomically dispersed Ru sites and the enhanced diffusion from open hollow structure respectively improve the redox kinetics and cycling stability,ultimately achieving a high-performance lithium–oxygen battery.

关键词： Atomically dispersed Open hollow structure Discharge product lithium Oxygen battery

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