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Journal of Energy Chemistry 2025年第1期100卷 760-769页

作者： lin peng Yu Bai Hang li Meixiu Qu Zhenhua Wang Kening Sun Advanced Research institute of Mul.idisciplinary Science Beijing Institute of Technology Beijing Key laboratory of Chemical Power Source and Green Catalysis School of Chemistry and Chemical Engineering Beijing Institute of Technology

lithium-sulfur （li-S） batteries have gained great attention due to the high theoretical energy density and low cost,yet their further commercialization has been obstructed by the notorious shuttle effect and sluggish redox ***,we supply a strategy to optimize the electron structure of Ni2P by concurrently introducing B-doped atoms and P vacancies in Ni2P （Vp-B-Ni2P）,thereby enhancing the bidirectional sulfur *** study indicates that the simultaneous introduction of B-doped atoms and P vacancies in Ni2P causes the redistribution of electron around Ni atoms,bringing about the upward shift of d-band center of Ni atoms and effective d-p orbital hybridization between Ni atoms and sulfur species,thus strengthening the chemical anchoring for lithium polysul.ides （liPSs） as well as expediting the bidirectional conversion kinetics of sulfur ***,theoretical calculations reveal that the incorporation of B-doped atoms and P vacancies in Ni2P selectively promotes li2S dissolution and nucleation ***,the li-S batteries with Vp-B-Ni2P-separators present outstanding rate ability of 777 m A h g-1at 5 C and high areal capacity of 8.03 mA h cm-2under E/S of 5μl mg-1and sulfur loading of 7.20 mg *** work elucidates that introducing heteroatom and vacancy in metal phosphide collaboratively regulates the electron structure to accelerate bidirectional sulfur conversion.

关键词： lithium sulfur batteries

low-cost and fluoride-free synthesis of MFi zeolite nanosheets with enhanced stability for benzene alkylation with ethanol

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Journal of Energy Chemistry 2025年第1期100卷 458-468页

作者： peng Zhu Cun liu Yiren Yu Guoshu Gao Yumeng Zhao Xiongfu Zhang Guodong liu Guohui Yang State Key laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology State Key laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive structure-directing agents(SDAs), pricey raw materials, and eco-unfriendly fluorine-containing additives. Here, we contributed a cost-effective and fluoride-free synthesis method for synthesizing high-quality MFi zeolite nanosheets through a Silicalite-1(Sil-1) seed suspension and urea cooperative strategy, only with inexpensive coll.idal silica as the Si source. Our approach was effective for synthesizing both Sil-1 and aluminum-containing ZSM-5 nanosheets. By optimizing key synthesis parameters,including seed aging time, seed quantity, and urea concentration, we achieved precise control over the crystal face aspect ratio and b-axis thickness. We also revealed a non-classical oriented nanosheet growth mechanism, where Sil-1 seeds induced the formation of quasi-ordered precursor particles, and the(010)crystal planes of these particles facilitated urea adsorption, thereby promoting c-axis-oriented *** obtained ZSM-5 nanosheets exhibited exceptional catalytic performance in the benzene alkylation with ethanol, maintaining stability for over 500 h, which is 5 times longer than traditional ZSM-5 catalysts. Furthermore, large-scale production of ZSM-5 nanosheets was successfully carried out in a 3 l highpressure autoclave, yiel.ing samples consistent with those from laboratory-scale synthesis. This work marks a significant step forward in the sustainable and efficient production of MFi nanosheets using inexpensive and environmentally friendly raw materials, offering the broad applicability in catalysis.

关键词： MFi zeolite ZSM-5 Nanosheets Scale-up synthesis Aromatic alkylation

Deciphering the role of mtH2O2 in hepatic ischemia-reperfusion injury mechanisms with low-background super-resolution fluorogenic probe

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Science China Chemistry 2025年第01期 297-307页

作者： Bin Fang limin Wang Haoqin li Jiaxin Zhang Yang Ding Pan Pan li Bo peng Hua Bai lin li Frontiers Science Center for Flexible Electronics Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials &Engineering Northwestern Polytechnical University institute of Flexible Electronics (iFE Future Technologies) Xiamen University

Hepatic ischemia-reperfusion injury（HiRi） is characterized by mitochondrial dysfunction and oxidative stress. Monitoring mitochondrial hydrogen peroxide（mtH2O2） levels in real-time through super-resolution imaging is crucial for elucidating its distribution in live cells and its mechanism of action during HiRi. However, low-background fluorogenic probes have been overlooked in the context of super-resolution imaging. in this study, we developed a low-background fluorogenic probe（MitoWG） with the potential for super-resolution morphology-correlated mitochondrial.identification to track the fluctuates of mtH2O2in HiRi. Activation of the desirable fluorescence properties of the probe by mtH2O2was confirmed using structural.illumination microscopy（SiM）, enabling high-quality mitochondrial.imaging with exceptional specificity and *** in mtH2O2levels were successfully observed in both cellular and rat models of HiRi. Furthermore, we associated the decline in mitochondrial redox homeostasis with accelerated mtH2O2production during HiRi, which triggered mitophagy deficiency and led to cell death. in conclusion, Mito-WG possesses excellent photophysical and low-background properties for SiM imaging, making it a promising tool for mtH2O2tracking in HiRi research and clinical diagnosis.

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improved data gap-fil.ing schemes for estimation of net ecosystem exchange in typical East-Asian croplands

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Science China Earth Sciences 2016年第8期59卷 1652-1664页

作者： ZHAO peng Johannes lüERS Department of Micrometeorology University of Bayreuth institute of Ecology University of Innsbruck Member of Bayreuth Center of Ecology and Environmental Research (BayCEER) University of Bayreuth

The estimation of carbon exchange between ecosystems and the atmosphere suffers unavoidable data gaps in eddy-covariance technique, especially for short-living and fast-growing croplands. in this study we developed a modified gap-fil.ing scheme introducing a leaf area index factor as the vegetation status information based on the conventional light response function for two East-Asian cropland sites (rice and potatoes). This scheme’s performance is comparable to the conventional time window scheme, but has the advantage when the gaps are large compared to the total length of the time series. To investigate how the time binning approach performs for fast-growing croplands, we tested different widths of the time window, showing that a four-day window for the potato field and an eight-day time window for the rice field perform the best. The insufficiency of the conventional temperature binning approach was expl.ined as well as the influence of vapor pressure deficit. We found that vapor pressure deficit plays a minor role in both the potato and the rice fields under Asian monsoon weather conditions with the exception of the early pre-monsoon growing stage of the potatoes. Consequently, we recommend using the conventional time-window scheme together with our new leaf-light response function to fill data gaps of net ecosystem exchange in fast-growing croplands.

关键词： Eddy-covariance Gap-fil.ing Net ecosystem exchange l.i

Guaranteed Cost Attitude Tracking Control for Uncertain Quadrotor Unmanned Aerial Vehicle Under Safety Constraints

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iEEE/CAA Journal of Automatica Sinica 2024年第6期11卷 1447-1457页

作者： Qian Ma peng Jin Frank l.lewis School of Automation Nanjing University of Science and TechnologyNanjing 210094China UTA Research institute University of Texas at ArlingtonFort WorthTexas 76118 USA iEEE

in this paper,guaranteed cost attitude tracking con-trol for uncertain quadrotor unmanned aerial vehicle(QUAV)under safety constraints is ***,an augmented system is constructed by the tracking error system and reference *** transformation aims to convert the tracking control prob-lem into a stabilization control ***,control barrier function and disturbance attenuation function are designed to characterize the violations of safety constraints and tolerance of uncertain disturbances,and they are incorporated into the reward function as penalty *** on the modified reward function,the problem is simplified as the optimal regulation problem of the nominal augmented system,and a new Hamilton-Jacobi-Bellman equation is ***,critic-only rein-forcement learning algorithm with a concurrent learning tech-nique is employed to solve the Hamilton-Jacobi-Bellman equa-tion and obtain the optimal *** proposed algorithm can not only ensure the reward function within an upper bound in the presence of uncertain disturbances,but also enforce safety *** performance of the algorithm is evaluated by the numerical simulation.

关键词： Attitude tracking control quadrotor unmanned aerial vehicle(QUAV) reinforcement learning safety constraints uncertain disturbances.

Dynamic Characteristics of the Jet Force on the Flapper of the Pilot Stage in a Flapper Nozzle Servo Valve Under the Flow-Solid interaction

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Journal of Beijing institute of Technology 2020年第4期29卷 445-455页

作者： Xinbei lü Jinghui peng Songjing li Fl.id Control and Automation Systems Harbin Institute of TechnologyHarbin 150001China

Nowadays,more and more attention has been paid to improve the performance of the nozzle flapper servo *** a core part of nozzle flapper servo valve,the armature assembly is affected by electromagnetic force,jet force and feedback force at the same *** to the complex structure of the pilot stage flow field and the high jet pressure,the prediction of the jet force has always been difficult in modeling the transient motion of the servo ***,a numerical simulation method based on the flow-solid interaction(FSi)is applied to observe the variation of the jet force when the flapper is *** parameters are employed to seek a suitable numerical simulation model which can balance the accuracy and computational *** comparing with the experiment results,the effectiveness of numerical simulation method in predicting the variation of the jet force and cavitation is *** this numerical simulation model,the distribution of flow field and the force on the flapper predicted by the moving and fixed flapper are *** results show that more dynamic details are achieved by the transient *** analyzing the numerical simulation results of different inlet pressures and flapper vibration frequencies,the relationship between the movement of the flapper,the flow field distribution,the jet force and the inlet pressure is established,which provides a theoretical basis for the subsequent modeling of the armature assembly.

关键词： flapper nozzle servo valve numerical simulation force variation flow field

improved Reall-Santos method for AdS black holes in general 4-derivative gravities

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Science China(Physics,Mechanics & Astronomy) 2024年第8期67卷 74-86页

作者： peng-Ju Hu liang Ma Hong lü Yi Pang Center for Joint Quantum Studies and Department of Physics School of ScienceTianjin UniversityTianjin 300350China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China peng Huanwu Center for Fundamental Theory Hefei 230026China

For asymptotically flat black holes,Reall-Santos method is a convenient tool to compute leading higher derivative corrections to the thermodynamic quantities without actually sol.ing the modified field ***,there are subtleties in its generalization to asymptotically AdS black holes with general higher derivative *** of all.it is necessary to know all the higher derivative holographic counterterms and the surface terms implementing the variational principle and subtracting the *** then needs to solve for the modified AdS radius and rescale the time coordinate in an appropriate way such that the induced metric on the conformal boundary of AdS black hole is not *** observe that Reall-Santos method can be directly applied to a particular 4-derivative gravity model,known as the Einstein-Weyl gravity,which does not modify the AdS radius and requires only the Gibbons-Hawking-York term and holographic counterterms for the 2-derivative *** thus suggest that to compute the thermodynamic quantities of AdS black holes in general 4-derivative theories of gravity,one simply needs to transform it to a Einstein-Weyl gravity with identical thermodynamic variables by appropriate field *** explicitly verify this proposal with spherically-symmetric and static charged black holes in Einstein-Maxwell theory extended with generic 4-derivative interactions.

关键词： black holes thermodynamics higher-derivative corrections effective theories higher dimensional black holes quantum gravity

[2+2]Photocycloaddition Reaction Regulated the Stability and Morphology of Hydrogels

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Advanced Fiber Materials 2019年第3期1卷 241-247页

作者： Ting peng Auphedeous Yinme Dang-i Jinying liu Chuanliang Feng State Key lab of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong University800 Dongchuan RoadShanghai 200240China Key laboratory for Special Functional Materials of Ministry of Education School of Materials Science and EngineeringHenan UniversityKaifeng 475004China

Photoresponsive supramolecular gels as intel.igent non-invasive responsive materials can undergo changes in color,state,morphology and electronic properties upon photo irradiation,making them attractive for a variety of ***,a novel supramolecular hydrogelator DBE with 1,4-divinylbenzene as the central core,connected via amide linkage to l-phenylalanine and peripheral hydrophilic groups,was designed to evaluate the effect of[2+2]photocycloaddition reaction on supramolecular *** irradiation decreases the solubility of the hydrogelator DBE and hence,causes the destruction of the *** images clearly show that irradiation with UV light could induce disintegration of the right-handed helical nanofibers entangled network,which turns into nanoparticles and eventually massive *** dichroism and vibrational circular dichroism data also indicate the formation of right-handed helical nanofibers in DBE *** and MAl.i-TOF-MS spectrum confirm that the variation of stability and aggregated morphology of DBE gel after UV irradiation is attributed to[2+2]cycloaddition reaction of vinyl *** study presents a wonderful model for regulating the stability and aggregated morphology of supramolecular hydrogels via photo irradiation,as well as offers new ideas for designing novel photo responsive materials.

关键词： [2+2]Photocycloaddition reaction Supramolecular hydrogels Supramolecular chirality Vinyl units UV light

Verbascoside exerts an anti-atherosclerotic effect by regulating liver glycerophospholipid metabolism

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Food Science and Human Wellness 2023年第6期12卷 2314-2323页

作者： peng l.i Jialin lü Tie Yao peng Zhang Xin Chai Yuefei Wang Miaomiao Jiang State Key laboratory of Component-based Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjin 301617China Key laboratory of Pharmacology of Traditional Chinese Medicine Formulae Ministry of EducationTianjin University of Traditional Chinese MedicineTianjin 301617China

Verbascoside,abundant in olive mill wastewater,is a phenylethanolic glycoside with a wide range of pharmacological ***(AS)is a common metabolic disease and abnormal lipid metabolism in liver is inseparable from its formation and *** this study,the anti-atherosclerotic effect of verbascoside was evaluated by establishing an atherosclerosis model based on western diet feeding of apolipoprotein E-defi cient mice for 16 *** 12 weeks of administration during the feeding period,the levels of total cholesterol(TC),triglyceride(TG),low density lipoprotein cholesterol(lDl-C)in the plasma of mice were signifi cantly decreased,the formation of arterial plaques was delayed,and the levels of alanine aminotransferase(AlT),aspartate aminotransferase(AST)and lactate dehydrogenase(lDH)in plasma were alleviated,showing the hepatoprotective *** addition,based on untargeted lipidomic analysis,verbascoside stabilized glycerophospholipid metabolism,modulated lipid metabolism disorders and reduced lipid deposition in the liver to achieve the therapeutic effi cacy against atherosclerosis by regulating cardiolipin(Cl),ether-linked phosphatidylcholine(ether-PC),lysophophatidylcholine(lPC),phosphatidylcholine(PC),oxidized phosphatidylcholine(OxPC),oxidized phosphatidylethanolamine(OxPE),triacylglycerol(TG),sphingomyelin(SM)back to normal levels.

关键词： Atherosclerosis Verbascoside lipid deposition lipidomics Glycerophospholipid metabolism

EFFECT OF TESTiNG ENViRONMENT ON FRACTURiNG BEHAViOR OF Fe_3Si BASED AllOY

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Acta Metallurgica Sinica(English letters) 2003年第2期16卷 104-109页

作者： J.H.peng G.l.Chen National Key laboratory for Nuclear Fuel&Materials China Nuclear Power InstituteChengdu 610041ChinaState Key Laboratory for Advanced Metal MaterialsUniversity of Science&Technology BeijingBeijing 100083China

The mechanical behavior of Fes Si based alloy with B2 structure was studied by tension and fracture toughness test in various testing media. The fracture strength σb of Fe3Si alloy decreased in the following order: oxygen, air and hydrogen respectively. The fracture toughness in different testing environment showed that KiC in oxygen is 11.5±0.3MPa·m1/2, and is 8.6±0.4MPa·ml/2 in distilled water. The reduction of fracture toughness is contributed to the environmental reaction of Si with water. Addition of Al element in Fe3Si is not beneficial to improve the intrinsic ductility of Fe-14Si-3Al alloy. The scattering phenomenon of fracture strength was found, and expl.ined by fracture mechanics. it was found by means of SEM that the fracture mode changed from transgranular in oxygen to intergranular in hydrogen gas and distilled water.

关键词： Fe3Si intermetal.ic mechanical behavior environmental em- brittlement