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Integrating Cu+/Cu0 sites on porous nitrogen-doped carbon nanofibers for stable and efficient CO2 electroreduction to multicarbon products

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Journal of Energy Chemistry 2025年第2期101卷 453-462页

作者： Yicheng Chao Jiahao Zhang Qinyue Wu Xinfei Fan Xie Quan Yanming Liu Key Laboratory of Industrial Ecology and Environmental Engineering (MOE) School of Environmental Science and Technology Dalian University of Technology College of Environmental Science and Engineering Dalian Maritime University frontier Science center for Smart Materials Dalian University of Technology

The Cu+/Cu0sites of copper-based catalysts are crucial for enhancing the production of multicarbon(C2+)products from electrochemical CO2reduction reaction（eCO2RR）.However,the unstable Cu+and insufficient Cu+/Cu0active sites lead to their limited selectivity and stability for C2+***,we embedded copper oxide（CuOx） particles into porous nitrogen-doped carbon nanofibers（CuOx@PCNF）by pyrolysis of the electrospun fiber film containing ZIF-8 and Cu2O *** porous nitrogendoped carbon nanofibers protected and dispersed Cu+species,and its micro porous structure enhanced the interaction between CuOxand reactants during *** obtained CuOx@PCNF created more effective and stable Cu+/Cu0active *** showed a high Faradaic efficiency of 62.5% for C2+products in Hcell,which was 2 times higher than that of bare CuOx（～31.1%）.Furthermore,it achieved a maximum Faradaic efficiency of 80.7% for C2+products in flow *** situ characterization and density functional theory（DFT） calculation confirmed that the N-doped carbon layer protected Cu+from electrochemical reduction and lowered the energy barrier for the dimerization of**** and exposed Cu+/Cu0active sites enhanced the enrichment of*CO and promoted the C-C coupling reaction on the catalyst surface,which facilitated the formation of C2+products.

关键词： Carbon nanofibers Cu+/Cu0 sites C–C coupling Electrocatalytic CO2 reduction Multicarbon products

ImSpiRE: image feature-aided spatial resolution enhancement method

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Science China(Life Sciences) 2025年第1期68卷 272-283页

作者： Yuwei Hua Yizhi Zhang Zhenming Guo Shan Bian Yong Zhang State Key Laboratory of Cardiovascular Diseases and Medical Innovation center Institute for Regenerative MedicineDepartment of NeurosurgeryShanghai East HospitalShanghai Key Laboratory of Signaling and Disease ResearchFrontier Science Center for Stem Cell ResearchSchool of Life Sciences and TechnologyTongji UniversityShanghai 200092China

The resolution of most spatially resolved transcriptomic technologies usually cannot attain the single-cell level,limiting their applications in biological ***,we introduce ImSpiRE,an image feature-aided spatial resolution enhancement method for in situ capturing spatial *** the information stored in histological images,ImSpiRE solves an optimal transport problem to redistribute the expression profiles of spots to construct new transcriptional profiles with enhanced resolution,together with extending the gene expression profiles into unmeasured *** to multiple datasets confirm that ImSpiRE can enhance spatial resolution to the subspot level while contributing to the discovery of tissue domains,signaling communication patterns,and spatiotemporal characterization.

关键词： spatial transcriptome histological images spatial resolution enhancement

Preparation of FeCoNi medium entropy alloy from Fe^(3+)-Co^(2+)-Ni^(2+)solution system

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 92-101页

作者： Zongyou Cheng Qing Zhao Mengjie Tao Jijun Du Xingxi Huang Chengjun Liu Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China Engineering Research center of frontier Technologies for Low-carbon Steelmaking(Ministry of Education) Shenyang 110819China

In recent years,medium entropy alloys have become a research hotspot due to their excellent physical and chemical *** controlling reasonable elemental composition and processing parameters,the medium entropy alloys can exhibit similar properties to high entropy alloys and have lower *** this paper,a FeCoNi medium entropy alloy precursor was prepared via sol-gel and coprecipitation methods,respectively,and FeCoNi medium entropy alloys were prepared by carbothermal and hydrogen *** phases and magnetic properties of FeCoNi medium entropy alloy were *** showed that FeCoNi medium entropy alloy was produced by carbothermal and hydrogen reduction at 1500℃.Some carbon was detected in the FeCoNi medium entropy alloy prepared by carbothermal *** alloy prepared by hydrogen reduction was uniform and showed a relatively high ***,the hydrogen reduction product exhibited better saturation magnetization and lower coercivity.

关键词： medium entropy alloy sol-gel co-precipitation carbothermal hydrogen reduction

Optimized inner ear organoids for efficient hair cell generation and ototoxicity response modeling

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Science China Life Sciences 2025年

作者： Xuanhe Qin Liping Fu Chunying Li Xilin Tan Xiaolei Yin Institute for Regenerative Medicine State Key Laboratory of Cardiology and Medical Innovation CenterShanghai East HospitalFrontier Science Center for Stem Cell ResearchSchool of Life Sciences and TechnologyTongji University

Hair cells in the mammalian cochlea are highly vulnerable to damage from drug toxicity,noise exposure,aging,and genetic mutations,with no capacity for *** in hair cell protection research has been limited by the scarcity of cochlear tissue and suitable in vitro ***,we present a novel one-step,self-organizing inner ear organoid system optimized with small molecules,which bypasses the need for multi-step expansion and forced differentiation *** approach efficiently generates hair cells and supporting cells that recapitulate the molecular,cellular,and structural characteristics of the inner ***-cell RNA sequencing revealed the diversity and fidelity of cell populations within the *** this platform,we validated the protective effects of candidate compounds against hair cell damage,highlighting its potential as a powerful tool for drug discovery and mechanistic studies of hair cell protection.

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Gate-controlled multistate modulation in few-layer graphene via layer-by-layer ion intercalation

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Science China(Physics,Mechanics & Astronomy) 2025年第04期Mechanics & Astronomy) .卷 5-12页

作者： Siyi Zhou Shaorui Li Yongchao Wang Chenglin Yu Yayu Wang Jinsong Zhang State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University frontier Science center for Quantum Information Hefei National Laboratory

The simultaneous modulation of electric and optical properties in graphene is essential for advancing high-performance applications in optoelectronics. However, achieving in-situ control of multiple electric and optical states in graphene devices remains a challenge. Here we demonstrate a versatile and reversible electric-field control of organic-ion intercalation from bilayer to pentalayer graphene. Through simultaneous optical imaging and electric measurements, we reveal multiple physical states controlled by the layer-by-layer intercalation processes, resulting in both high transparency and high electric conductance with an increase in the number of intercalated layers. Raman spectroscopy demonstrates that the intercalated graphene maintains a high carrier concentration without lattice degradation. Moreover, Hall effect measurements reveal that the carrier density can reach approximately 1.5 × 1014cm-2per layer. The ability to synchronously control the transparency and conductance states by adjusting the number of ion-intercalated layers highlights the potential of multistate modulation for the development of advanced optoelectronic devices in two-dimensional materials.

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Decoupling the roles of grain boundary strength and grain size hidden in grain-level electro-chemo-mechanical failure of solid-state electrolyte

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Journal of Energy Chemistry 2025年第2期101卷 685-691页

作者： Ming Xu Xuyang Wang Zhengqian Jin Xingxing Jiao Ya Gao Zhongxiao Song Xieyu Xu Kai Xi Yangyang Liu School of Chemistry Engineering Research Center of Energy Storage Materials and Devices Ministry of Education Xi'an Jiaotong University State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Research Institute of frontier Science Southwest Jiaotong University School of Instrument Science and Technology Xi'an Jiaotong University

Garnet lithium lanthanum zirconium oxide(Li7La3Zr2O12,LLZO) is a benchmark solid-state electrolyte（SSE） material receiving considerable attention owing to its high conductivity and chemical stability against Li *** its electro-chemo-mechanical failure mechanisms have been much investigated,the equivocal roles of grain boundary strength and grain size of LLZO remain under-explored,hindering further performance *** we decoupled the effects of grain size and grain boundary strength of polycrystalline LLZO via the combination of electrochemical kinetics and the cohesive zone *** discovered that the disintegration of LLZO is initiated by the accumulation of local displacements,which strongly relates to the changes in both grain size and grain boundary ***,variations in grain boundary strength affect the diffusion and propagation pathways of damage,while the failure of LLZO is determined by the grain *** LLZO grains facilitate transgranular damage under low grain boundary strength,which can alter local chemo-mechanics within the bulk of LLZO,leading to more extensive damage *** results showcase the structure optimization pathways by preferentially controlling the growth of lithium dendrites at grain boundaries and their penetration in garnet-type SSE.

关键词： Electro-chemo-mechanics Grain boundary Growth of lithium metal Solid-state electrolyte

Weak KAM theory for two classes of almost periodic Hamiltonian systems

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Science China Mathematics 2025年

作者： Xun Niu Kaizhi Wang Yong Li School of Mathematics and Statistics Center for Mathematics and Interdisciplinary SciencesNortheast Normal University School of Mathematical Sciences Shanghai Frontier Science Center of Modern Analysis (CMA-Shanghai)Shanghai Jiao Tong University Institute of Mathematics Jilin University

The purpose of this paper is to investigate the dynamics of Bohr almost periodic and Levitan almost periodic Hamiltonian systems via the weak KAM theory. We obtain minimal measures and weak KAM solutions in both cases. The weak KAM solution is a weak solution to the Hamilton-Jacobi equation, which formally transforms the original Hamiltonian systems into an integrable one. Consequently, we get the existence of an invariant torus in the aforementioned weak sense.

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Single-cell RNA sequencing reveals the heterogeneity and interactions of immune cells and Müller glia during zebrafish retina regeneration

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Neural Regeneration Research 2025年第12期20卷 3635-3648页

作者： Hui Xu Lining Cao Yuxi Chen Cuiping Zhou Jie Xu Zhuolin Zhang Xiangyu Li Lihua Liu Jianfeng Lu Shanghai YangZhi Rehabilitation Hospital(Shanghai Sunshine Rehabilitation center) Frontier Science Center for Stem Cell ResearchSchool of Life Sciences and TechnologyTongji UniversityShanghaiChina Key Lab of Neuroregeneration of Jiangsu and Ministry of Education Co-innovation Center of NeuroregenerationNMPA Key Laboratory for Research and Evaluation of Tissue Engineering Technology ProductsNantong UniversityNantongJiangsu ProvinceChina

Inflammation plays a crucial role in the regeneration of fish and avian ***,how inflammation regulates Müller glia(MG)reprogramming remains ***,we used single-cell RNA sequencing to investigate the cell heterogeneity and interactions of MG and immune cells in the regenerating zebrafish *** first showed that two types of quiescent MG(resting MG1 and MG2)reside in the uninjured *** retinal injury,resting MG1 transitioned into an activated state expressing known reprogramming genes,while resting MG2 gave rise to rod *** further showed that retinal microglia can be categorized into three subtypes(microglia-1,microglia-2,and proliferative)and pseudotime analysis demonstrated dynamic changes in microglial status following retinal *** of cell–cell interactions indicated extensive crosstalk between immune cells and MG,with many interactions shared among different immune cell ***,we showed that inflammation activated Jak1–Stat3 signaling in MG,promoting their transition from a resting to an activated *** study reveals the cell heterogeneity and crosstalk of immune cells and MG in zebrafish retinal repair,and may provide valuable insights into future mammalian retina regeneration.

关键词： immune cells inflammation Jak1-Stat3 signaling microglia Müller glia regeneration reprogramming retina single-cell RNAseq zebrafish

Spin-modulated near-infrared-Ⅰ emission in a xanthene-decorated Fe(Ⅱ) spin-crossover complex

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Science China Chemistry 2025年

作者： Cheng Yi Duyong Chen Shihui Zhang Rui Cai Chunying Duan Yinshan Meng Tao Liu State Key Laboratory of Fine Chemicals Frontier Science Center for Smart Materials and Chemical Engineering School of Chemical Engineering Dalian University of Technology Instrumental Analysis center Dalian University of Technology School of Chemistry Dalian University of Technology Liaoning Binhai Laboratory

Molecular materials showing synergetic coupling of near-infrared （NIR） fluorescence and spin-crossover （SCO） are promisingly applicable in in-vivo bioimaging,temperature sensing,and spintronic *** the related study faces formidable *** this work we graft the NIR fluorophore xanthene onto the dipyridyl substituted triazole ligand and construct a new Febased SCO material,{FeⅡ（ddxc-abpt）2[N（CN）2]2}(1,ddxc-abpt:（E）-4-(((3,5-di（pyridin-2-yl）-4H-1,2,4-triazol-4-yl)imino)methyl)-N,N-diethyl-2,3-dihydro-1H-xanthen-6-amine).Magnetic studies indicate that compound 1 exhibits thermally induced SCO property in both the solid and solution ***-temperature fluorescence emission spectra reveal a remarkable 7-fold increase in photoluminescence intensity upon the transition from the low-spin state at 110 K to the high-spin state at 280 K,which is the record of all reported coupled fluorescence-SCO ***-temperature ultraviolet-visible （UV-Vis）absorption spectra show a significant change in absorption intensity within the fluorescence emission window,consistent with the F?rster resonance energy transfer （FRET） ***-dependent density functional theory （TD-DFT） calculations demonstrate that the strong coupling is attributed to disrupted energy transfer between the xanthene fluorophore and high-spin *** work provides a feasible approach for expanding the synergetic SCO-fluorescence materials to the NIR-Iwavelength region,and hopefully contributes to the applications of tunable NIR-SCO molecule-based sensors and devices.

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