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caH2-promoted activity of Ni-carbonate interface for cO2 methanation

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Journal of Energy chemistry 2025年第1期100卷 522-532页

作者： Jin-Peng Wang Guo-cui Mao Hui-Lin Jiang Bao-xia Dong Yun-Lei Teng School of chemistry and chemical Engineering Yangzhou University

Transition metal-carbonate interfaces often act as active sites in heterogeneous catalytic *** interface between transition metal and metal carbonate exhibits a dynamic equilibrium during the cO2hydrogenation reaction,involving surface carbonate hydrogenation and ***,there have been few reports on engineering the activity of the interface between transition metal and alkaline earth metal carbonate for catalytic *** work demonstrated that the incorporation of caH2in Ni/cacO3enhances the cO2methanation activity of the *** cO2conversion for Ni/caH2-cacO3reached 68.5%at 400°c,which was much higher than that of the Ni/cacO3（31.6%） and Ni/caH2-caO （42.4%） ***,the Ni/caH2-cacO3catalysts remained stable during the stability test for 24 h at 400°c and 8 *** research revealed that caH2played a crucial role in promoting the activity of the Ni-carbonate interface for ***2could modify the electronic structure of Ni and tune the structural properties of cacO3to generate medium basic sites （OH groups）,which are favorable for the activation of H2and ***-situ Fourier transform infrared spectroscopy （FTIR） analysis combined with density functional theory calculations demonstrated that cO2activation occurs at the hydroxyl group （OH） on the caH2-modified Ni-carbonate surface,leading to the formation of cO3H****,our study has confirmed that cO2methanation over the Ni/caH2-cacO3catalysts proceeds via the formate pathway.

关键词： cO 2 methanation Metal hydride Ni catalysts carbonate Metal-carbonate interface

Amperometric Glucose Sensor Based on Batch cuO-Modified Screen-Printed Silver-carbon Electrodes

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 35-41页

作者： xia Haiyan HUANG Yin YANG Hua WANG xintian SHI Jianping LIU Lixia FU Yacheng QUAN changyun LI Suyuan cofoe Medical Technology company Limited Changsha 410000China Institute of New Energy Hexi UniversityZhangye 734000China chemistry and chemical Engineering Central South UniversityChangsha 410000China

cuO nanoparticles were successfully synthesized via a two-jet electrospun method,and then screen-printed on silver-carbon electrodes,forming cuO-modified Ag-c(cuO/Ag-c)disposable strip *** natural environment condition for glucose detection,the obtained cuO/Ag-c electrodes show a high sensitivity of 540 nA·mM^(-1)·cm^(-2),and a low limit of detection(0.68 mM)in a wide linear response range of 0.68 mM and 3 mM(signal/noise=3),*** addition,the cuO/Ag-c electrodes also exhibit excellent anti-interference,air stability and *** a result,the fabrication of cuO nanoparticles via an electrospun process and the technique of screen-printed electrodes are of great significance for glucose detection.

关键词： electrochemical sensor cuO nanoparticles glucose detection screen-printing technique

3D Printing of Tough Hydrogel Scaffolds with Functional Surface Structures for Tissue Regeneration

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Nano-Micro Letters 2025年第2期17卷 18-45页

作者： Ke Yao Gaoying Hong ximin Yuan Weicheng Kong Pengcheng xia Yuanrong Li Yuewei chen Nian Liu Jing He Jue Shi Zihe Hu Yanyan Zhou Zhijian xie Yong He State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China Liangzhu Laboratory Zhejiang UniversityHangzhou 310027People’s Republic of China Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province College of Mechanical EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China Stomatology Hospital School of StomatologyZhejiang University School of MedicineHangzhou 310027People’s Republic of China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001People’s Republic of China Institute of Digital Medicine Nanjing First HospitalNanjing Medical UniversityNanjing 210006People’s Republic of China

Hydrogel scaffolds have numerous potential applications in the tissue engineering ***,tough hydrogel scaffolds implanted in vivo are seldom reported because it is difficult to balance biocompatibility and high mechanical *** by chinese ramen,we propose a universal fabricating method(printing-P,training-T,cross-linking-c,PTc&PcT)for tough hydrogel scaffolds to fill this ***,3D printing fabricates a hydrogel scaffold with desired structures(P).Then,the scaffold could have extraordinarily high mechanical properties and functional surface structure by cycle mechanical training with salting-out assistance(T).Finally,the training results are fixed by photo-cross-linking processing(c).The tough gelatin hydrogel scaffolds exhibit excellent tensile strength of 6.66 MPa(622-fold untreated)and have excellent ***,this scaffold possesses functional surface structures from nanometer to micron to millimeter,which can efficiently induce directional cell ***,this strategy can produce bionic human tissue with mechanical properties of 10 kPa-10 MPa by changing the type of salt,and many hydrogels,such as gelatin and silk,could be improved with PTc or PcT *** experiments show that this scaffold can effectively promote the new generation of muscle fibers,blood vessels,and nerves within 4 weeks,prompting the rapid regeneration of large-volume muscle loss injuries.

关键词： 3D printing Tough hydrogel scaffold Functional surface structure Tissue regeneration Biomaterials

Stable copper boron–imidazolate cage as cu-riched enzyme for highly efficient electrocatalytic cO2 reduction to ethylene

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Science china chemistry 2025年

作者： Jun-Qiang chen Qiao-Hong Li Qin-Long Hong Ping Shao Hai-xia Zhang Jian Zhang State Key Laboratory of Structural chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Single-atom catalyst has garnered widespread attention to mimic mature enzymes due to its well-defined atomic structure and coordination environments. However, since the carbon–carbon（c–c） coupling reactions require synergistic catalysis of multiple sites, single-atom catalysts suffer from insufficient active sites and unclear reaction mechanisms. controlling the reaction intermediates in a precisely targeted pocket through careful metal–organic cage design is therefore crucial. Here, we prepare a tetrahedral [cu6L4]-type boron–imidazolate cage integrating highly active cu sites and optimized cavity, which exhibits enzyme like specific catalytic performance in electrochemical cO2reduction reaction（cO2RR） to enhance the selectivity of *** analyses and computational calculations suggest that the single cu site together with neighboring boron–imidazolate ligands provides suitably synergistic effects that enable the energetically favorable formation of an *cOcHO intermediate, a key step determining selectivity. As a result, the [cu6L4]-type cage of BIc-145 achieves a Faradaic efficiency of 28% for c2H4maintaining an average current density of -3.54 mA cm-2over a 5-hour electrolysis period. This work represents the first example for studying single-metal site catalysts with ultra-low coordination numbers through the rational design of metal–organic cages.

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Advances and applications in single-cell and spatial genomics

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Science china Life Sciences 2025年

作者： Jingjing Wang Fang Ye Haoxi chai Yujia Jiang Teng Wang xia Ran Qimin xia Ziye xu Yuting Fu Guodong Zhang Hanyu Wu Guoji Guo Hongshan Guo Yijun Ruan Yongcheng Wang Dong xing xun xu Zemin Zhang Beijing Advanced Innovation center for Genomics (IcG) Peking University Guangdong Provincial Key Laboratory of Genome Read and Write BGI Research Bone Marrow Transplantation center of the First Affiliated Hospital & Liangzhu Laboratory Zhejiang University School of Medicine Life Sciences Institute and The Second Affiliated Hospital Zhejiang University BGI Research Biomedical Pioneering Innovation center (BIOPIc) and School of Life Sciences Peking University Academy for Advanced Interdisciplinary Studies Peking University Institute of Hematology Zhejiang University Department of Laboratory Medicine of The First Affiliated Hospital & Liangzhu Laboratory Zhejiang University School of Medicine center for Stem cell and Regenerative Medicine Zhejiang University School of Medicine Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine Dr.Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine

The applications of single-cell and spatial technologies in recent times have revolutionized the present understanding of cellular states and the cellular heterogeneity inherent in complex biological systems. These advancements offer unprecedented resolution in the examination of the functional genomics of individual cells and their spatial context within tissues. In this review, we have comprehensively discussed the historical development and recent progress in the field of single-cell and spatial genomics. We have reviewed the breakthroughs in single-cell multi-omics technologies, spatial genomics methods, and the computational strategies employed toward the analyses of singlecell atlas data. Furthermore, we have highlighted the advances made in constructing cellular atlases and their clinical applications,particularly in the context of disease. Finally, we have discussed the emerging trends, challenges, and opportunities in this rapidly evolving field.

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Palladium installed copper-organic framework for c–c coupling reactions

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Science china chemistry 2025年

作者： Yu-Mei Wang Mei-xia Tao Kai-Ming Mo xu chen Shu-Hua Zhong Elena S Shubina Guo-Hong Ning Dan Li college of chemistry and Materials Science Guangdong Provincial Key Laboratory of Supramolecular Coordination ChemistryJinan University A.N.Nesmeyanov Institute of Organoelement compounds Russian Academy of Sciences

The formation of c–c bonds is a crucial aspect of organic synthesis. Synthesists' long-term objective is to identify novel catalysts to optimize reaction systems based on traditional transition metal catalysis. This study explores the synthesis and catalytic potential of palladium-installed covalent metal-organic frameworks(cMOFs) based on copper cyclic trinuclear units(cu-cTUs). By incorporating palladium ions into the imine-based framework JNM-7 through a straightforward immersion method, we achieved a notable enhancement in catalytic activity for critical c–c coupling reactions, including c–H arylation and Sonogashira cross-coupling. The resulting JNM-7-Pd demonstrated remarkable stability and recyclability, maintaining its efficiency over at least three cycles without any decline in efficiency.

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Grain refinement in low SFE and particle-containing nickel aluminium bronze during severe plastic deformation at elevated temperatures

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Journal of Materials Science & Technology 2021年第23期82卷 57-68页

作者： c.J.Barr K.xia Department of Mechanical Engineering University of MelbourneVictoria3010Australia DMTc Ltd. 24 Wakefield St.HawthornVIC3122Australia

The influence of particle size and morphology on grain refinement in low stacking fault energy(SFE)alloys was studied by comparing the grain structures in single-and multi-phase Al-bronze(AB)alloys following equal channel angular pressing(EcAP)between 350 and 500℃.In particular,nickel aluminium bronze(NAB)was chosen as it contained both coarse and fine rounded particles,as well as a lamellar phase which evolved during *** refinement in the single-phase alloy was achieved through dynamic recrystallisation initiated at deformed twin *** contrast,different mechanisms were observed in the particle-containing *** around the coarseκⅡparticles(~5μm)was promoted through particle stimulated nucleation(PSN),whereas recrystallisation in the region of the fineκⅣ(~0.4μm)was delayed due to the activation of secondary *** refinement in areas of the lamellarκⅢshowed significant variation,depending on the lamellar orientation relative to the shear plane of *** the lamellae deformed,numerous high angle grain boundaries were generated between fragments and served as nucleation sites for recrystallisation,while PSN occurred around spheroidised *** spreading of theκⅢparticles by EcAP then enhanced the total area of recrystallised grains.

关键词： Equal channel angular pressing copper alloys Grain refinement Stacking fault energy Severe plastic deformation

Ballistic current induced effective force on magnetic domain wall

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Nano-Micro Letters 2009年第1期1卷 34-39页

作者： c.Wang K.xia Department of Physics Beijing Normal University

The collective dynamics of magnetic domain wall under electric current is studied in the form of spin transfer torque(STT). The out-of-plane STT induced effective force is obtained based on the Landau-Lifshitz-Gilbert(LLG) equation including microscopic STT terms. The relation between microscopic calculations and collective description of the domain wall motion is established. With our numerical calculations based on tight binding free electron model, we find that the non adiabatic out-of-plane torque components have considerable non-local properties. It turns out that the calculated effective forces decay significantly with increasing domain wall widths.

关键词： Magnetic domain Spin Transfer torque Spintronics First principle study

cOMPARISON OF SURFAcE PROPERTIES OF Ti-6Al-4V cOATED WITH TITANIUM NITRIDE, TiN+Tic+Ti(c,N)/DLc, TiN/DLc AND Tic/DLc FILMS BY PLASMA-BASED ION IMPLANTATION

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Acta Metallurgica Sinica(English Letters) 2000年第4期13卷 967-973页

作者： Ji, H.B. xia, L.F. Ma, x.x. Sun, Y. Sun, M.R. Harbin Inst of Technology Harbin China

The surface properties of Ti-6Al-4V alloy coated with titanium nitride, TiN+Tic+Ti(c,N)/DLc (diamond like carbon), TiN/DLc and Tic/DLc films by plasma-based ion implantation (PBII) with nitrogen, PBII with nitrogen then acetylene, PBII with nitrogen then glow discharge deposition with acetylene plus hydrogen and PBII with acetylene then glow discharge deposition with acetylene plus hydrogen respectively were studied. The corresponding films are found getting dimmer, showing light gold or gold, smoky color (uneven), light red in black (uneven), and graphite black separately. The corresponding film resistivities are given. Antioxidation ability of the titanium nitride film is poor, while the existence of carbon (or carbide) improves the antioxidation ability of the films. Having undergone excellent intermediate transitional region of nitrogen and carbon implantation, the top DLc layer of the TiN+Tic+Ti(c,N)/DLc multilayer are formed after the carbon implantation has the best adhesion with the substrate among all the multilayers. Although microhardness of the samples increases in the order of coatings of titanium nitride, TiN/DLc, TiN+Tic+Ti(c,N)/DLc and Tic/DLc, the TiN/DLc and Tic/DLc multilayers have greater brittleness as compared with other films.

关键词： Titanium alloys Titanium nitride Plasmas Ion implantation Microhardness Surface properties