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Co/Co_(7)Fe_(3)heterostructures with controllable alloying degree on carbon spheres as bifunctional electrocatalyst forrechargeable zinc-air batteries

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 476-487页

作者： Junkang Chen Yongyue Zhuang Yanxin Qiao Yu zhang Aihua yuan Hu Zhou School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

Exploring efficient and nonprecious metal electrocatalysts of oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is crucial for developing rechargeable zinc-air batteries(ZABs).Herein,an alloying-degree control strategy was employed to fabricate nitrogen-doped carbon sphere(NCS)decorated with dual-phase Co/Co_(7)Fe_(3)heterojunctions(CoFe@NCS).The phase composition of materials has been adjusted by controlling the alloying *** optimal CoFe_(0.08)@NCS electrocatalyst displays a half-wave potential of 0.80 V for ORR and an overpotential of 283 mV at 10 mA·cm^(-2)for OER in an alkaline *** intriguing bifunctional electrocatalytic activity and durability is attributed to the hierarchically porous structure and interfacial electron coupling of highly-active Co_(7)Fe_(3)alloy and metallic Co *** the CoFe_(0.08)@NCS material is used as air-cathode catalyst of rechargeable liquid-state zinc-air battery(ZAB),the device shows a high peak power-density(157 mW·cm^(-2))and maintains a stable voltage gap over 150 h,outperforming those of the benchmark(Pt/C+RuO_(2))-based *** particular,the as-fabricated solid-state flexible ZAB delivers a reliable compatibility under different bending *** work provides a promising strategy to develop metal/alloy-based electrocatalysts for the application in renewable energy conversion technologies.

关键词： bifunctional electrocatalysts oxygen reduction reaction oxygen evolution reaction zinc-air battery metal/alloy carbon sphere

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Wafer‑Scale Ag_(2)S‑Based Memristive Crossbar Arrays with Ultra‑Low Switching‑Energies Reaching Biological Synapses

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Nano-Micro Letters 2025年第3期17卷 328-339页

作者： yuan Zhu Tomas Nyberg Leif Nyholm Daniel Primetzhofer Xun Shi Zhen zhang Division of Solid‑State Electronics Department of Electrical EngineeringUppsala University75121 UppsalaSweden Department of Chemistry Uppsala UniversityUppsalaSweden Department of Physics and Astronomy Uppsala UniversityUppsalaSweden State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China

Memristive crossbar arrays(MCAs)offer parallel data storage and processing for energy-efficient neuromorphic ***,most wafer-scale MCAs that are compatible with complementary metal-oxide-semiconductor(CMOS)technology still suffer from substantially larger energy consumption than biological synapses,due to the slow kinetics of forming conductive paths inside the memristive *** we report wafer-scale Ag_(2)S-based MCAs realized using CMOS-compatible processes at temperatures below 160℃.Ag_(2)S electrolytes supply highly mobile Ag+ions,and provide the Ag/Ag_(2)S interface with low silver nucleation barrier to form silver filaments at low energy *** further enhancing Ag+migration in Ag_(2)S electrolytes via microstructure modulation,the integrated memristors exhibit a record low threshold of approximately−0.1 V,and demonstrate ultra-low switching-energies reaching femtojoule values as observed in biological *** low-temperature process also enables MCA integration on polyimide substrates for applications in flexible ***,the intrinsic nonidealities of the memristive units for deep learning can be compensated by employing an advanced training *** impressive accuracy of 92.6%in image recognition simulations is demonstrated with the MCAs after the *** demonstrated MCAs provide a promising device option for neuromorphic computing with ultra-high energy-efficiency.

关键词： Wafer-scale Ag_(2)S films Reactive sputter Silver nucleation Ag^(+)migration Energy-efficient neuromorphic computing

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Reconstruction characteristics of gut microbiota from patients with type 1 diabetes affect the phenotypic reproducibility of glucose metabolism in mice

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Science China(Life Sciences) 2025年第1期68卷 176-188页

作者： Zhiyi Wang Mengxue Gong yuanyuan Fang Huijuan yuan Chenhong zhang State Key Laboratory of Microbial Metabolism School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China Department of Endocrinology Henan Provincial People’s HospitalPeople’s Hospital of Zhengzhou UniversityZhengzhou 450003China

The human microbiota-associated(HMA)mice model,especially the germ-free(GF)-humanized mice,has been widely used to probe the causal relationships between gut microbiota and human diseases such as type 1 diabetes(T1D).However,most studies have not clarified the extent to which the reconstruction of the human donor microbiota in recipient mice correlates with corresponding phenotypic *** this study,we transplanted fecal microbiota from five patients with T1D and four healthy people into GF mice,and microbiota from each donor were transplanted into 10 *** with similar microbiota structure to the donor exhibited better phenotypic *** characteristics of the microbial community assembly of donors also influenced the phenotypic reproducibility in mice,and individuals with a higher proportion of stochastic processes showed more severe *** enriched in patients with T1D had a stronger colonization potential in mice with impaired glucose metabolism,and microbiota functional features related to T1D were better reproduced in these *** indicates that assembly traits and colonization efficacy of microbiota influence phenotypic reproducibility in GF-humanized *** findings provide important insights for using HMA mice models to explore links between gut microbiota and human diseases.

关键词： gut microbiome human microbiota-associated animal model type 1 diabetes

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Preparation of Hydrogen Species and the Associated Reduction Properties under Electrochemical Processes on ZnO and Au/ZnO Electrodes

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Chinese Journal of Chemical Physics 2025年第1期38卷 73-80,I0032-I0039,I0056页

作者： Wangyang Li Lufeng yuan Qian wen Mengyi Ci Zhen zhang Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026China Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China

ZnO-based catalysts have been widely used in hydrogenation reactions,but less attention has been paid to the electrocatalytic hydrogenation process on ZnO *** this work,the preparation of hydrogen species and the associ-ated reduction properties under electrochemi-cal processes in aqueous solutions have been in-vestigated on ZnO and Au/ZnO *** measurements of cyclic voltammetry(CV),X-ray diffraction,and electron paramagnetic resonance(EPR)confirm the formation of hydro-gen species on the interstitial sites(Hi)or on the oxygen vacancy sites(H_(O)).The hydrogena-tion reaction of p-nitrophenol(pNP)at 40μmol/L occurs on both ZnO and Au/ZnO elec-trodes,and the hydrogenation reduction performance of Au/ZnO electrode is better than that of ZnO *** show H_(O)species is much more reactive with pNP than Hi *** with the ZnO electrode,the presence of Au on ZnO promotes the formation of H_(O)species and improves the electro-reduction performance to *** results help us to un-derstand the reaction processes related to the electrochemical hydrogenation on ZnO and Au/ZnO surfaces and shed new light on the design of new catalytic hydrogenation systems.

关键词： Electrocatalytic hydrogenation Hydrogen species ZnO Au/ZnO p-Nitrophenol

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Enantioselective copper-catalyzed dearomative borylative cyclization of indoles and mechanistic insights

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Science China Chemistry 2025年第2期68卷 670-678页

作者： Yanfei Li Xuetao Li Zheng zhang Yiliang zhang Xiuping yuan Jianjun Yin Simin Wang Wei Guan Qian zhang Tao Xiong Jilin Province Key Laboratory of Organic Functional Molecular Design&Synthesis Department of ChemistryNortheast Normal UniversityChangchun 130024China Institute of Functional Material Chemistry Department of ChemistryNortheast Normal UniversityChangchun 130024China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China School of Chemistry and Chemical Engineering Harbin Normal UniversityHarbin 150025China

Alicyclic nitrogen heterocycles,such as enantioenriched polycyclic fused[1,2-a]indoline derivatives,are widespread in natural products,agrochemicals and pharmaceutical *** methods predominantly rely on the recent emerging Heck-type catalytic asymmetric dearomatization(CADA)protocol,wherein noble palladium catalysts commonly necessitate the form arylPd species-triggered these *** contrast,a more sustainable base metal catalysis paradigm through alkyl metal species disrupting the aromaticity,that is,the utilization of challenging asymmetric Csp3–Csp3 bond formation entry to such important chiral densely functionalized polycyclic molecular scaffolds,remains an elusive ***,we report the first copper-catalyzed dearomative borylative cyclization of indoles under mild reaction conditions,affording an array of valuable Bpin-containing pyrrolo-fused[1,2-a]indolines bearing four consecutive stereogenic centers with excellent enantioand *** synthetic potential was documented via an array of useful *** functional theory(DFT)calculation studies elucidated the origin of the chemo-,regio-,enantio-and diastereoselectivities of this conversion.

关键词： copper catalysis dearomatization borylative cyclization indoles DFT calculations

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Advances in enhancing hydrodeoxygenation selectivity of lignin-derived oxygenates:From synthetic strategies to fundamental techniques

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Green Energy & Environment 2025年第2期10卷 292-321页

作者： Xinru Wu Hongwei zhang Cejun Hu Xiaojun Bao Pei yuan National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou UniversityFuzhou350002China College of Materials Science and Engineering Fuzhou UniversityFuzhou350108China Qingyuan Innovation Laboratory Quanzhou362801China

In recent years,studies focusing on the conversion of renewable lignin-derived oxygenates(LDOs)have emphasized their potential as alternatives to fossil-based ***,LDOs,existing as complex aromatic mixtures with diverse oxygen-containing functional groups,pose a challenge as they cannot be easily separated via distillation for direct utilization.A promising solution to this challenge lies in the efficient removal of oxygen-containing functional groups from LDOs through hydrodeoxygenation(HDO),aiming to yield biomass products with singular ***,the high dissociation energy of the carbon-oxygen bond,coupled with its similarity to the hydrogenation energy of the benzene ring,creates a competition between deoxygenation and benzene ring *** hydrogen consumption and lignin properties,the preference is directed towards generating aromatic hydrocarbons rather than saturated ***,the goal is to selectively remove oxygen-containing functional groups while preserving the benzene ring *** on LDOs conversion have indicated that the design of active components and optimization of reaction conditions play pivotal roles in achieving selective deoxygenation,but a summary of the correlation between these factors and the reaction mechanism is *** review addresses this gap in knowledge by firstly summarizing the various reaction pathways for HDO of *** explores the impact of catalyst design strategies,including morphology modulation,elemental doping,and surface modification,on the adsorption-desorption dynamics between reactants and ***,we delve into the application of advanced techniques such as spectroscopic techniques and computational modeling,aiding in uncovering the true active sites in HDO reactions and understanding the interaction of reactive reactants with catalyst ***,fundamental insights into selective deoxygenation obtained through these techniqu

关键词： Hydrodeoxygenation Lignin-derived oxygenates Targeted deoxidation Catalyst design Techniques and theoretical calculation

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BIOMIMETIC PHOTO-ELECTRIC CONVERSION PORPHYRIN TETRAD

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影像科学与光化学 1992年第2期 165-168页

作者： QIAN wen-yuan zhang BAO-wen BAI JIAN-WBI CAO YI JIA JIAN-GUANG XIAO XU-RUI(Laboratory of Photochemistry, Institute of Photographic Chemistry Academia Sinica, Beijing 100101, P.R. China)

In recent years, intramolecular electron transfer reactions have been investigated intensively in relation to the imitation of photosynthesis. Photosynthesis in green plants and bacteria is carried out by highly order... 详细信息

关键词： photo-electric conversion porphyrin tetrad langmuir-Blodgett (LB) film

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Effect of Co substitution for Fe on microstructure and magnetic properties of FeNiSiBCuNb alloy ribbons

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Chinese Physics B 2025年第2期34卷 438-446页

作者： wen-Feng Liu Ya-Ting yuan Chang-Jiang Yu Shu-Jie Kang Qian-Ke Zhu Zhe Chen Ke-Wei zhang Min-Gang zhang School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Laboratory of Magnetic and Electric Functional Materials and Applications The Key Laboratory of Shanxi ProvinceTaiyuan 030024China

This work investigated the microstructure,magnetic properties,and crystallization kinetics of the as-spun and annealed alloy ribbons of(Fe_(40-x)Co_xNi_(40)Si_(6.33)B_(12.66)Cu_1)_(0.97)Nb_(0.03),where x=0,6,7,8,9,prepared using the meltspinning *** results show that adding a moderate amount of Co can improve the glass forming ability(GFA),the first peak crystallization temperature,and thermal stability of the as-spun alloy *** x=7,the two-stage crystallization temperature interval△Tx=90 exhibits optimal thermal stability,and the alloy annealed at 673 K for 10 minutes shows the favorable combined magnetic properties,with H_(c)=0.12 A/m,M_(s)=88.7 A·m^(2)/kg,andμ_(e)=*** magnetic domain results show that annealing removes numerous pinning points in the magnetic domains of the alloy ribbons,making the domain walls smoother and effectively reducing the pinning effect.

关键词： amorphous alloys Co substitution for Fe glass formation ability magnetic properties crystallization kinetics

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Interfacial Pt-N coordination for promoting oxygen reduction reaction

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Chinese Chemical Letters 2025年第2期36卷 509-513页

作者： Jialin Cai Yizhe Chen Ruiwen zhang Cheng yuan Zeyu Jin Yongting Chen Shiming zhang Jiujun zhang Institute for Sustainable Energy/College of Sciences Shanghai University School of Chemistry and Chemical Engineering Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials Wuhan University of Science and Technology

Nitrogen-doping of carbon support（N-C） for platinum（Pt） nanoparticles to form Pt/N-C catalyst represents an effective strategy to promote the electrocatalysis of cathodic oxygen reduction reaction（ORR）in proton exchange membrane fuel cells. For fundamental understanding, clearly identifying the metalsupport effect on enhancement mechanisms of ORR electrocatalysis is definitely needed. In this work,the impact of Pt-support interaction via interfacial Pt-N coordination on electrocatalytic ORR activity and stability in Pt/N-C catalyst is deeply studied through structural/compositional characterizations,electrochemical measurements and theoretical DFT-calculations/AIMD-simulations. The resulting Pt/N-C catalyst exhibits a superior electrocatalytic performance compared to the commercial Pt/C catalyst in both half-cell and H2-O2fuel cell. Experimental and theoretical results reveal that the interfacial Pt-N coordination enables electron transfer from N-C support to Pt nanoparticles, which can weaken the adsorption strength of oxygen intermediates on Pt surface to improve ORR activity and induce the strong Pt-support interaction to enhance electrochemical stability.

关键词： N-doped carbon Oxygen reduction reaction Platinum Pt-N Theoretical calculations

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The long noncoding RNA ALEX1 confers a functional phase state of ARF3 to enhance rice resistance to bacterial pathogens

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Molecular Plant 2025年第1期18卷 114-129页

作者： Meng-Qi Lei Rui-Rui He Yan-Fei Zhou Lu Yang Zhen-Fei zhang Chao yuan wen-Long Zhao Yu Cheng Jian-Ping Lian Yu-Chan zhang wen-Tao Wang Yang Yu Yue-Qin Chen Guangdong Provincial Key Laboratory of Plant Stress Biology State Key Laboratory for BiocontrolSchool of Life SciencesSun Yat-Sen UniversityGuangzhou 510275P.R.China Guangdong Key Laboratory of Crop Germplasm Resources Preservation and Utilization Agro-biological Gene Research CenterGuangdong Academy of Agricultural SciencesGuangzhou 510640P.R.China Plant Protection Research Institute Guangdong Academy of Agricultural SciencesGuangzhou 510640P.R.China

Rice bacterial blight is a devastating disease worldwide,causing significant yield *** how plants defend against microbial infection is critical for sustainable crop *** this study,we show that ALEX1,a previously identified pathogen-induced long noncoding RNA,localizes to the nucleus and directly binds AUXIN RESPONSE FACTOR 3(ARF3).We showed that ARF3 forms the condensates in the nucleus via its intrinsically disordered middle region(MR),and that these ARF3 condensates display solid-like *** further revealed that ALEX1 directly binds the MR of ARF3 to regulate ARF3 condensate dynamics and promote ARF3 *** dispersed,dimeric form of ARF3,referred to as its functional phase state,enhances its ability to transcriptionally repress the expression of downstream target genes such as JAZ13,thereby modulating the jasmonic acid signaling pathway and enhancing pathogen resistance in ***,this study reveals the role of a long noncoding RNA in regulating protein condensation and complex assembly,thus contributing to plant pathogen resistance.

关键词： lncRNA Xoo ARF3 protein condensates

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