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Nickel-copper alloying arrays realizing efficient co-electrosynthesis of adipic acid and hydrogen

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Journal of Energy Chemistry 2025年第02期101卷 7-15页

作者： Xuhui Ren Qianyu zhang Yun Tong Guorong Zhou cong lin Yanying Zhao Pengzuo Chen School of Chemistry and Chemical Engineering Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province Zhejiang Sci-Tech University

Constructing electrocatalytic overall reaction technology to couple the electrosynthesis of adipic acid with energy-saving hydrogen production is of significant for sustainable energy ***,the development of highly-active bifunctional electrocatalysts remains a ***,3D hierarchical nickel-copper alloying arrays with dendritic morphology are manufactured by a simple electrodeposition process,standing for the excellent bifunctional electrocatalyst towards the co-production of adipic acid and H2from cyclohexanone and *** membrane-free flow electrolyzer of Cu0.81Ni0.19/NF shows the superior electrooxidation performance of ketone-alcohol（KA） oil with high faradaic efficiencies of over 90% for adipic acid and H2,robust stability over 200 h as well as a high yield of 0.6 mmol h-1for adipic acid at 100 mA ***-situ spectroscopy indicates the Cu0.81Ni0.19alloy contributes to forming more active NiOOH species to involve in the conversion of cyclohexanone to adipic acid,while the proposed reaction pathway undergoes the 2-hydroxycyclohexanone and 2,7-oxepanedione ***,the theoretical calculations confirm that the optimal electronic interaction,boosted reaction kinetics as well as improved adsorption free energy of reaction intermediates,synergistically endows Cu0.81Ni0.19alloy with superior bifunctional performance.

关键词： Adipic acid Cu0.81Ni0.19 alloy Cyclohexanone oxidation reaction Hydrogen evolution reaction Hydrogen fuel

Effect of pouring time on microstructure and mechanical properties of centrifugal cast Ti-46Al alloy tubes

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China Foundry 2025年第1期22卷 65-74页

作者： Gang Huang Qian Dang cong-cong Su Jing Zhao Chi zhang Guo-huai Liu Zhao-dong Wang The State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China

The grain size of TiAl alloy castings prepared by traditional casting process is coarse,thus showing poor mechanical *** this study,a new type of high performance Ti-46Al alloy tube prepared by vacuum centrifugal casting technology was *** research comprehensively examined the influence of pouring time on the microstructure and mechanical performance of the castings,employing both experimental approaches and ProCast simulation *** findings indicate that prolonging the pouring time facilitates a microstructural evolution from coarse columnar grains to refined equiaxed *** the condition of pouring temperature of 1,600℃,rotation speed of 800 r·min^(-1) and pouring time of 6 s,the tensile strength of Ti-46Al alloy at room temperature reaches 650 MPa,and the tensile strength at 800℃ reaches 705 MPa,which is significantly higher than that of traditional as-cast Ti-Al alloy.

关键词： vacuum induction melting centrifugal casting Ti-46Al alloy pouring time Ti-Al alloy tubes

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Numerical Study of Flow and Heat Transfer Characteristics of Shell-and-Tube Molten Salt Electric Heater with Circularly Perforated Baffles

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Journal of Thermal Science 2025年第1期34卷 24-33页

作者： lin Yongjie zhang Cancan WU Yuting zhang Yi LU Yuanwei Key Laboratory of Heat Transfer and Energy Conversion National User-Side Energy Storage Innovation Research and Development CenterBeijing University of TechnologyBeijing 100124China

Numerical simulations of the flow and heat transfer characteristics of four shell-and-tube molten salt electric heaters with different perforation rates was ***-and-tube electric heaters have the same geometry and tube arrangement,and all of them use single segmental baffles,but there exist four different baffle openings(φ),i.e.,0%,2.52%,4.06%,and 6.31%.The results indicated that the reasonable baffle opening could significantly reduce the shell-side pressure drop,effectively decreasing the shell-side flow dead zone *** can eliminate the local high-temperature phenomenon on the surface of electric heating tubes,but the heat transfer coefficient is slightly *** perforated schemes significantly reduce shell-side pressure drop compared to the baseline solution without open *** particular,the φ=6.31% scheme exhibits the optimal performance among all the schemes,with a maximum reduction of up to 50.50% in shell-side pressure drop relative to the unopened holes *** heat transfer coefficient is the highest for φ=0%,exhibiting a range of5.26% to 5.73%,5.14% to 5.99%,and 7.31% to 8.54% higher than φ=2.52%,4.06%,and 6.31%,respectively,within the calculated *** composite index h/(Δp)^(1/3)was higher for all open-hole solutions than that for the unopened-hole *** best overall performance was for φ=6.31%,which improved the composite index by15.29%to 17.18%over the unopened-hole solution.

关键词： molten salt electric heater perforated baffles heat transfer

Aerodynamic Optimization and Flow Mechanism for a Compressor Cascade at Low Reynolds Number

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Journal of Thermal Science 2025年第1期34卷 92-109页

作者： LI lin zhang Jianshe CHEN Caiyan TAN Wei zhang Yanfeng Key Laboratory of Light-Duty Gas-Turbine Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China National Key Laboratory of Science and Technology on Advanced Light-duty Gas-turbine Beijing 100190China

Low-Reynolds-number effect is an important factor affecting the performance of compressors and other main components of high-altitude long-endurance unmanned aerial *** improve the flow condition and reduce flow loss under the condition of high altitude and low Reynolds number(Re),this paper proposes an optimization process based on a surrogate model,which combines the class-shape transformation method(CST),the Latin hypercube sampling(LHS)method,the light gradient-boosting machine algorithm(LightGBM),and a genetic algorithm(GA)to optimize a high-subsonic compressor *** surrogate model is verified to be accurate and can be used in the optimization *** accuracy of the GA is higher than the other algorithms under common test *** optimization results are verified by numerical simulation,and the flow differences before and after optimization are compared,especially the flow within the boundary *** changing the blade shape,the optimization process adjusts the loading distribution to delay the transition of the optimized blade on the suction surface,which changes the turbulent reattachment in the laminar separation bubble(LSB)into laminar ***,the mixing loss induced by the turbulent reattachment of the LSB and the wake loss of turbulent separation at the trailing edge are significantly reduced,and the performance of the compressor profile is finally *** addition,turbulent separation of the optimized profile is delayed reducing the range of the wake region on the suction *** this optimization process,the reduction of total pressure loss coefficient at Re of 2.5×10^(5),3.5×10^(5),and 4.5×10^(5) are 16.32%,20.76%,and 22.16%,respectively.

关键词： low Reynolds numbers compressor optimization boundary layer transition

Breaking Solvation Dominance Effect Enabled by Ion-Dipole Interaction Toward Long-Spanlife Silicon Oxide Anodes in Lithium-Ion Batteries

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Nano-Micro Letters 2025年第4期17卷 367-380页

作者： Shengwei Dong lingfeng Shi Shenglu Geng Yanbin Ning cong Kang Yan zhang Ziwei Liu Jiaming Zhu Zhuomin Qiang lin Zhou Geping Yin Dalong Li Tiansheng Mu Shuaifeng Lou State Key Laboratory of Space Power-Sources School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China School of Marine Science and Technology Harbin Institute of Technology at WeihaiWeihai 264200People’s Republic of China Chongqing Research Institute of HIT Chongqing 401135People’s Republic of China

Micrometer-sized silicon oxide(SiO)anodes encounter challenges in large-scale applications due to significant volume expansion during the alloy/de-alloy ***,an innovative deep eutectic electrolyte derived from succinonitrile is introduced to enhance the cycling stability of SiO *** functional theory calculations validate a robust ion-dipole interaction between lithium ions(Li^(+))and succinonitrile(SN).The cosolvent fluoroethylene carbonate(FEC)optimizes the Li^(+)solvation structure in the SN-based electrolyte with its weakly solvating *** dynamics simulations investigate the regulating mechanism of ion-dipole and cation-anion *** unique Li^(+)solvation structure,enriched with FEC and TFSI^(-),facilitates the formation of an inorganic-organic composite solid electrolyte interphase on SiO ***-CT further detects the inhibiting effect on the SiO volume *** a result,the SiO|LiCoO_(2) full cells exhibit excellent electrochemical performance in deep eutectic-based *** work presents an effective strategy for extending the cycle life of SiO anodes by designing a new SN-based deep eutectic electrolyte.

关键词： Lithium-ion batteries Micrometer-sized silicon oxide Ion-dipole interaction Long-term cycling

Biomimetic nanoplatform integrates FRET-enhanced photodynamic therapy and chemotherapy for cascaded revitalization of the tumor immune microenvironment in OSCC

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Chinese Chemical Letters 2025年第1期36卷 392-396页

作者： Wenbin Zhou Yafei Gao Xinyu Feng Yanqing zhang cong Yang Lanxi He Fenghe zhang Xiaoguang Li Qing Li School and Hospital of Stomatology Cheeloo College of MedicineShandong UniversityJi’nan 250012China China&Shandong Key Laboratory of Oral Tissue Regeneration Ji’nan 250012China China&Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration Ji’nan 250012China Department of Stomatology Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJi’nan 250021China

Immunotherapy offers significant potential but is often hampered by the immunosuppressive environment in oral squamous cell carcinoma(OSCC).To address this,we propose an enhanced immunotherapeutic strategy that revitalizes the tumor immune microenvironment(TIME)in OSCC by integrating upconversion-based photodynamic therapy(PDT)with *** a red blood cell membraneinspired biomimetic nanoplatform,our approach concurrently delivers chlorin e6@upconversion nanoparticles(Ce6@UCNP)and doxorubicin(DOX).By leveraging fluorescence resonance energy transfer(FRET)for 980 nm to 660 nm upconversion excitation,we address challenges such as limited tissue penetration and tissue damage,as well as nanoplatform issues including immunogenicity and targeting inaccuracy Our integrated approach enhances PDT and chemotherapy with the goal of transforming immunologically“cold”tumors into“hot”ones through a cascaded therapy,thereby revitalizing the tumor immune microenvironment in OSCC.

关键词： Biomimetic nanoplatform UCNP-PDT Chemotherapy TIME OSCC

Thermally triggered topological polymerization in diacetylene-functionalized covalent organic framework toward enhanced memristive properties

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Science China Chemistry 2025年

作者： Panke Zhou Yuxing Huang Ziyue Yu cong zhang Qian Chen Yiping Li Chao lin Xiong Chen State Key Laboratory of Photocatalysis on Energy and Environment Key Laboratory of Advanced Carbon-Based Functional MaterialsCollege of Chemistry Fuzhou University

The development of stimuli-responsive switching memory devices and the elucidation of their switching mechanisms in specific environments are crucial for advancing the field of molecular electronics. Herein, we propose two distinct two-dimensional covalent organic frameworks (COFs), namely Py-EDA and Py-BDA, incorporating acetylene (-C≡C-) or diacetylene(-C≡C-C≡C-) moieties, respectively, targeting fabricate memory devices exhibiting stimuli-responsive switching *** findings demonstrate that the incorporation of acetylene units effectively modulates the electronic band structure and enhances the degree ofπ-conjugation, resulting in devices that exhibit typical bipolar nonvolatile memory performance. Notably,upon thermal treatment, the memory behavior of the ITO/Py-BDA/Ag device transitions to a write-once-read-many-times(WORM) mode, displaying decreased SET voltage, increased ON/OFF current ratio, and remarkable retention reliability and cycle stability. This switching behavior is attributed to the occurrence of interlayer solid-state topological polymerization at 350℃, leading to the transformation of diacetylene columnar arrays into enyne chains within Py-BDA, thereby further promoting interlayer charge transfer and separation.

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Tensor Decomposition-assisted Multiview Subgroup Analysis

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Acta Mathematica Sinica,English Series 2025年第2期41卷 588-618页

作者： Xun Zhao ling Zhou Weijia zhang Huazhen lin Center of Statistical Research and School of Statistics New Cornerstone Science LaboratorySouthwestern University of Finance and EconomicsChengdu 610064P.R.China Department of Financial and Actuarial Mathematics Xi'an Jiaotong-Liverpool UniversitySuzhou 215123P.R.China

To learn the subgroup structure generated by multidimensional interaction, we propose a novel multiview subgroup integration technique based on tensor decomposition. Compared to the traditional subgroup analysis that can only handle single-view heterogeneity, our proposed method achieves a greater level of homogeneity within the subgroups, leading to enhanced interpretability and predictive power. For computational readiness of the proposed method, we build an algorithm that incorporates pairwise shrinkage-encouraging penalties and ADMM techniques. Theoretically, we establish the asymptotic consistency and normality of the proposed estimators. Extensive simulation studies and real data analysis demonstrate that our proposal outperforms other methods in terms of prediction accuracy and grouping consistency. In addition, the analysis based on the proposed method indicates that intergenerational care significantly increases the risk of chronic diseases associated with diet and fatigue in all provinces while only reducing the risk of emotion-related chronic diseases in the eastern coastal and central regions of China.

关键词： Multiview subgroup analysis tensor decomposition data integration ADMM algorithm

Bilayered Dion–Jacobson lead-iodine hybrid perovskite with aromatic spacer for broadband photodetection

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Chinese Chemical Letters 2025年第2期36卷 586-589页

作者： Dongying Fu lin Pan Yanli Ma Yue zhang Institute of Crystalline Materials Shanxi University State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi University

Dion-Jacobson （DJ） phase hybrid perovskites have been proven to improve the photovoltaic performance of the devices due to its unique *** present,some DJ hybrid perovskites have been reported and used for photodetection filed,but most of them are based on lead-bromide systems,which is not conducive to construct broadband photodetection devices due to the limitation of intrinsic ***,we constructed a bilayered DJ hybrid perovskite （3AMPY）(EA)Pb2I7(3AMPY2+is 3-（aminomethyl）pyridinium,EA+is ethylammonium) using an aromatic spacer,which exhibit large current on/off ratios of 10～4under 520 and 637 nm *** particular,the single crystal device based on （3AMPY）(EA)Pb2I7shows a distinguished detectivity of 7.4×1012Jones and a high responsivity of 0.89A/W under 637 nm *** finding not only enriches the quantities of DJ hybrid perovskites,but also provides useful assistance for constructing high-performance optoelectronic device in the future.

关键词： Aromatic spacer Broadband photodetection Dion–Jacobson Hybrid perovskite Two-dimensional