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Ultra‑Efficient and Cost‑Effective Platinum Nanomembrane Electrocatalyst for sustainable Hydrogen Production

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Nano-Micro Letters 2024年第6期16卷 95-110页

作者： Xiang Gao shicheng dai Yun teng Qing Wang Zhibo Zhang Ziyin Yang Minhyuk Park Hang Wang Zhe Jia Yunjiang Wang Yong Yang Department of Mechanical Engineering College of EngineeringCity University of Hong KongTat Chee AvenueKowloon TongKowloonHong KongPeople’s Republic of China state Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijingPeople’s Republic of China school of Engineering science University of Chinese Academy of SciencesBeijingPeople’s Republic of China Laboratory for Microstructures Institute of MaterialsShanghai UniversityShanghaiPeople’s Republic of China school of Materials science and Engineering Jiangsu Key Laboratory for Advanced Metallic MaterialsSoutheast UniversityNanjingPeople’s Republic of China Department of Materials science and Engineering College of EngineeringCity University of Hong KongTat Chee AvenueKowloon TongKowloonHong KongPeople’s Republic of China

Hydrogen production through hydrogen evolution reaction(HER)offers a promising solution to combat climate change by replacing fossil fuels with clean energy ***,the widespread adoption of efficient electrocatalysts,such as platinum(Pt),has been hindered by their high *** this study,we developed an easy-to-implement method to create ultrathin Pt nanomembranes,which catalyze HER at a cost significantly lower than commercial Pt/C and comparable to non-noble metal *** Pt nanomembranes consist of highly distorted Pt nanocrystals and exhibit a heterogeneous elastic strain field,a characteristic rarely seen in conventional *** unique feature results in significantly higher electrocatalytic efficiency than various forms of Pt electrocatalysts,including Pt/C,Pt foils,and numerous Pt singleatom or single-cluster *** research offers a promising approach to develop highly efficient and cost-effective low-dimensional electrocatalysts for sustainable hydrogen production,potentially addressing the challenges posed by the climate crisis.

关键词： Platinum Hydrogen evolution reaction Lattice distortion Heterogeneous strain

trunk‑Inspired sWCNt‑Based Wrinkled Films for Highly‑stretchable Electromagnetic Interference shielding and Wearable thermotherapy

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Nano-Micro Letters 2024年第11期16卷 429-444页

作者： Xiaofeng Gong tianjiao Hu You Zhang Yanan Zeng Ye Zhang Zhenhua Jiang Yinlong tan Yanhong Zou Jing Wang Jiayu dai Zengyong Chu College of science National University of Defense TechnologyChangsha 410073People’s Republic of China Beijing Interdisciplinary Research Center National University of Defense TechnologyChangsha 410073People’s Republic of China school of Physics and Electronics Hunan UniversityChangsha 410082People’s Republic of China

Nowadays.the increasing electromagnetic waves generated by wearable devices are becoming an emerging issue for human health,so stretchable electromagnetic interference(EMI)shielding materials are highly *** trunks are capable of grabbing fragile vegetation and tearing trees.thanks not only to their muscles but also to their folded *** by the wrinkled skin of the elephant trunks,herein,we propose a winkled conductive film based on single-walled carbon nanotubes(sWCNts)for multifunctional EMI *** conductive film has a sandwich structure,which was prepared by coating sWCNts on both sides of the stretched elastic latex cylindrical *** shrinking-induced winkled conductive network could withstand up to 200%tensile ***,when the stretching direction is parallel to the polarization direction of the electric field,the total EMI shielding effectiveness could surprisingly increase from 38.4 to 52.7 dB at 200%tensile *** is mainly contributed by the increased connection of the *** addition,the film also has good Joule heating performance at several voltages,capable of releasing pains in injured *** unique property makes it possible for strain-adjustable multifunctional EMI shielding and wearable thermotherapy applications.

关键词： Electromagnetic interference shielding single-walled carbon nanotubes Wrinkles stretchable thermotherapy

Molecular Mechanisms of Intracellular Delivery of Nanoparticles Monitored by an Enzyme‑Induced Proximity Labeling

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Nano-Micro Letters 2024年第6期16卷 14-37页

作者： Junji Ren Zibin Zhang shuo Geng Yuxi Cheng Huize Han Zhipu Fan Wenbing dai Hua Zhang Xueqing Wang Qiang Zhang Bing He Department of Pharmaceutics school of Pharmaceutical sciences Peking University38 Xueyuan RdHaidian DistrictBeijing 100191People’s Republic of China

Achieving increasingly finely targeted drug delivery to organs.tissues,cells,and even to intracellular biomacromolecules is one of the core goals of *** the delivery destination is refined to cellular and subcellular targets,it is essential to explore the delivery of nanomedicines at the molecular ***,due to the lack of technical methods.the molecular mechanism of the intracellular delivery of nanomedicines remains unclear to ***,we develop an enzyme-induced proximity labeling technology in nanoparticles(nano-EPL)for the real-time monitoring of proteins.that interact with intracellular ***(lactic-co-glycolic acid)nanoparticles coupled with horseradish peroxidase(HRP)were fabricated as a model(HRP(+)-PNPs.to evaluate the molecular mechanism of nano delivery in *** adding the labeling probe biotin-phenol and the catalytic substrate H_(2)O_(2)at different time points in cellular delivery,nano-EPL technology was validated for the real-time in s.tu labeling of proteins interacting with ***-EPL achieves.the dynamic molecular profiling of 740 proteins.to map the intracellular delivery of HRP(+)-PNPs in macrophages over *** on dynamic clustering analysis of these proteins,we further discovered that different organelles,including endosomes,lysosomes.the endoplasmic reticulum,and the Golgi apparatus,are involved in delivery with distinct participation *** importantly,the engagement of these organelles differentially affects.the drug delivery efficiency,reflecting the spatial–temporal heterogeneity of nano delivery in *** summary,these findings highlight a significant methodological advance toward understanding the molecular mechanisms involved in the intracellular delivery of nanomedicines.

关键词： Enzyme-induced proximity labeling Intracellular delivery Nano-protein interaction Dynamic molecule profiling Macrophages

Microbial electricity-driven anaerobic phenol degradation in bioelectrochemical systems

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Environmental science and Ecotechnology 2024年第1期17卷 40-47页

作者： shixiang dai Falk Harnisch Micjel Chávez Morejòn Nina sophie Keller Benjamin Korth Carsten Vogt Department of Environmental Microbiology Helmholtz Centre for Environmental Research GmbH-UFZLeipzigGermany Department of Is.tope Biogeochemistry Helmholtz Centre for Environmental Research GmbH-UFZLeipzigGermany

Microbial electrochemical technologies have been extensively employed for phenol ***,previous research has yielded inconsistent results,leaving uncertainties regarding the feasibility of phenol degradation under strictly anaerobic conditions using anodes as sole terminal electron *** this study,we employed high-performance liquid chromatography and gas chromatography-mass spectrometry to investigate the anaerobic phenol degradation *** findings provide robust evidence for the purely anaerobic degradation of phenol,as we identified benzoic acid,4-hydroxybenzoic acid,glutaric acid,and other metabolites of this ***,no typical intermediates of the aerobic phenol degradation pathway were ***-chamber reactors.t0.4 V ***)exhibited a phenol removal rate of 3.5±0.2 mg L^(-1) d^(-1),while two-chamber reactors showed 3.6±0.1 and 2.6±0.9 mg L^(-1) d^(-1) at anode potentials of t0.4 and t 0.2 V,*** results also suggest that the reactor configuration certainly influenced the microbial community,presumably leading to different ratios of phenol consumers and microorganisms feeding on degradation products.

关键词： Microbial electroremediation Geobacter Extracellular electron transfer Anaerobic phenol degradation Microbial syntrophy

Highly stable side-chain-type cardo poly(aryl ether ketone)s membranes for vanadium flow battery

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Chinese Chemical Letters 2024年第3期35卷 167-170页

作者： Ziming Zhao Qing dai sihan Huang Wenjing Lu Yaohan Chen Jifu Zheng suobo Zhang shenghai Li Xianfeng Li Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China school of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China Division of Energy storage Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Vanadium flow batteries(VFBs)have drawn considerable attention as an emerging technology for largescale energy storage systems(Esss).One of the pivotal challenges is.the availability of eligible ion exchange membranes(ICMs.that provide high ion selectivity,proton conductivity,and stability under rigorous ***,a‘side-chain-type’strategy has been employed to fabricate highly stable phenolphthalein-based cardo poly(arylene ether ketone)s(PAEKs)membrane with low area resistance(0.058Ωcm^(2)),in which flexible alkyl spacers effectively alleviated inductive withdrawing effect from terminal ion exchange groups.thus enabling a stable *** assembled VFBs based on PAEKs bearing pendent alkyl chain terminated with quaternary ammonium(Q-PPhEK)demonstrated an energy efficiency above 80%over 700 cycles at 160 mA/cm^(2).such a remarkable results revealed that the side-chain-type strategy contributed to enhancing the ICMs stability in strong oxidizing environment,meanwhile,more interesting backbones would be woken with this design engaging in stable ICMs for VFBs.

关键词： Vanadium flow battery Energy storage technology Ion exchange membrane Ion transport mechanism Poly(arylene ether ketone)s(PAEKs)

A multi-objective optimization based on machine learning for dimension precision of wax pattern in turbine blade manufacturing

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Advances in Manufacturing 2024年第3期12卷 428-446页

作者： Jing dai song-Zhe Xu Chao-Yue Chen tao Hu san-san shuai Wei-Dong Xuan Jiang Wang Zhong-Ming Ren state Key Laboratory of Advanced special steels School of Materials Science and EngineeringShanghai UniversityShanghai200444People’s Republic of China

Wax pattern fabrication in the investment casting of hollow turbine blades directly determines.the dimension accuracy of subsequent casting,and therefore significantly affects.the quality of final *** this work,we develop a machine learning-based multi-objective optimization framework for improving dimension accuracy of wax pattern by optimizing its process *** consider two optimization objectives on the dimension of wax pattern,i.e.,the surface warpage and core *** active learning of Bayesian optimization is employed in data sampling to determine process parameters,and a validated numerical model of injection molding is used to compute objective results of dimension under varied process *** collected datas.t is.then leveraged to train different machine learning models,and it turns out that the Gaussian process regression model performs best in prediction accuracy,which is.then used as.the surrogate model in the optimization framework.A genetic algorithm is employed to produce a non-dominated Pareto front using the surrogate model in searching,followed by an entropy weight method to select the most optimal solution from the Pareto *** optimized s.t of process parameters is.then compared to empirical parameters obtained from previous.trial-and-error experiments,and it turns out that the maximum and average warpage results of the optimized solution decrease 26.0%and 20.2%,and the maximum and average errors of wall thickness compared to standard part decrease from 0.22 mm and 0.0517 mm using empirical parameters.to 0.10 mm and 0.0356 mm using optimized parameters,*** framework is demonstrated capable of addressing the challenge of dimension control arising in the wax pattern production,and it can be reliably deployed in varied types of turbine blades.to significantly reduce the manufacturing cost of turbine blades.

关键词： Hollow turbine blade Wax pattern fabrication Dimension control Multi-objective optimization Machine learning Numerical simulation

A real-time performance improvement method for compos.te time scale

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Chinese Physics B 2024年第9期33卷 350-357页

作者： Fangmin Wang Wenlin Li Hongfei dai Chunyi Li Jianhua Zhou shenhui Xue Bo Wang state Key Laboratory of Precision space–time Information sensing technology Department of Precision InstrumentTsinghua UniversityBeijing 100084China Key Laboratory of Photonic Control technology(tsinghua Univers.ty) Ministry of EducationBeijing 100084China Beijing s.tellite Navigation Center Beijing 100094China

the compos.te time scale(Cts)provides a stable,accurate,and reliable time scale for modern *** improvement of Cts’s real-time performance will improve its stability,which strengths related applications’*** at this goal,a method achieved by determining the optimal calculation interval and accelerating adjustment stage is proposed in this *** determinants of the Cts’s calculation interval(characteristics of the clock ensemble,the measurement noise,the time and frequency synchronization system’s noise and the auxiliary output generator noise floor)are studied and the optimal calculation interval is *** also investigate the effect of ensemble algorithm’s initial parameters on the Cts’s adjustment stage.A strategy to get the reasonable initial parameters of ensemble algorithm is *** results show that the adjustment stage can be finished rapidly or even can be shorten to zero with reasonable initial *** this basis,we experimentally generate a distributed Cts with a calculation interval of 500 s and its stability outperforms.those of the member clocks when the averaging time is longer than1700 *** experimental result proves.that the Cts’s real-time performance is significantly improved.

关键词： compos.te time scale real-time performance calculation interval adjustment stage

GPCR-Gs mediates.the protective effects of ginsenoside Rb1 against oxygen-glucose deprivation/re-oxygenation-induced astrocyte injury

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Journal of traditional Chinese Medical sciences 2024年第1期11卷 33-43页

作者： Xi Wang Ying Liu Juan Li Jiayu Xie Yi dai Minke tang school of Chinese Materia Medica Beijing University of Chinese MedicineBeijing 102488China taihe Hospital Hubei University of MedicineShiyan 442000China school of Medicine Hyogo Medical UniversityNishinomiya 663-8501Japan

Objectives.to investigate whether the protective actions of ginsenoside Rb1(Rb1)on astrocytes are mediated through the G_(s)-type G-protein-coupled receptor(GPCR-G_(s)).Methods:Primary astrocyte cultures derived from neonatal mouse brain were *** injury was induced via oxygen-glucose deprivation/re-oxygenation(OGD/R).Cell morphology,viability,lactate dehydrogenase(LDH)leakage,apoptosis,glutamate uptake,and brain-derived neurotrophic factor(BDNF)secretion were assessed to gauge cell survival and *** blot was used to investigate the cyclic adenosine monophosphate(cAMP)and protein kinase B(Akt)signaling ***-G_(s)-specific inhibitors and molecular docking were used to identify target ***:Rb1 at concentrations ranging from 0.8 to 5μM did not significantly affect the viability,glutamate uptake,or BDNF secretion in normal ***/R reduced astrocyte viability,increasing their LDH leakage and apoptosis *** also decreased glutamate uptake and BDNF secretion by these ***1 had protective effects of astrocytes challenged by OGD/R,by improving viability,reducing apoptosis,and enhancing glutamate uptake and BDNF ***,Rb1 activated the cAMP and Akt pathways in these *** the GPCR-G_(s) inhibitor NF449 was introduced,the protective effects of Rb1 completely disappeared,and its activation of cAMP and Akt signaling pathways was significantly ***:Rb1 protects against astrocytes from OGD/R-induced injury through GPCR-G_(s) mediation.

关键词： Ginseng Ginsenoside Rb1 Receptor GPCR Astrocytes Neuroprotective effects

Ultrahigh strength and uniform corrosion in Zn-Li alloys.through ultrahigh pressure supers.turated solid solution treatment for biodegradable orthopedic applications

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Rare Metals 2024年第10期43卷 5284-5304页

作者： Wan-Ying Li Yi-Long dai Wen-Hao Cai si-Han Lin Lin Guo De-Chuang Zhang Yuncang Li Cuie Wen school of Materials science and Engineering Xiangtan University Department of Prosthodontics Shanghai Ninth People′s HospitalShanghai Jiao Tong University Key Laboratory of Low Dimensional Materials&Application technology Ministry of EducationXiangtan University school of Engineering RMIT UniversityMelbourne

Zn-Li alloys are considered promising candidate materials for biodegradable orthopedic implant applications due to their high mechanical performance and good ***,the presence of a large number of second-phase particles in this class of Zn alloys can lead to severe localized degradation due to micro-galvanic corrosion,which is detrimental to the mechanical integrity of the alloys during tissue healing in the human *** this study we report ultrahigh strength,uniform corrosion,good cytocompatibility,and effective antibacterial ability in Zn-x Li（x=0.3,0.5,0.7;wt%） alloys achieved through supers.turated solid solution treatment （ss.t） at 375℃ under ultrahigh pressure of 3 GPa.A high concentration of β-LiZn4phases coexisted with the-Zn matrix in the as-cast Zn-x Li alloys,whereas almost all the Li dissolved into the-Zn matrix of ss.t *** yield strength was 437 MPa for ss.t Zn-0.3Li,592 MPa for ss.t Zn-0.5 Li and 686 MPa for ss.t *** ss.t Zn-Li alloys showed uniform degradation with remarkably reduced degradation rates compared to their as-cast *** 25% concentration extracts of the Zn-x Li alloys demonstrated no cytotoxicity toward MC3t3-E1 cells,and the alloys exhibited effective antibacterial ability agains methicillin-resistant staphylococcus aureus.

关键词： Corrosion behavior Mechanical property supers.turated solid solution treatment (ss.t) Ultrahigh pressure Zn-Li alloy