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Promoting electrocatalytic nitrogen reduction to ammonia via dopant boron on two-dimensional materials

Rare Metals 2024年第10期43卷 5117-5125页

作者： Ya-Hui Cui Wen-Cheng Ouyang Ai-Jun Gao Chang-Yuan Yu Li-Peng Zhang State Key Laboratory of Organic-Inorganic Composites College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China College of Materials Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China College of Life Science and Technology Beijing University of Chemical TechnologyBeijing 100029China

Electrocatalytic nitrogen reduction reaction(NRR)is a key process for producing energy efficient and environment friendly ***-doped two-dimensional materials are highly promising as NRR ***,the interaction between doped boron and matrix materials on NRR catalytic performance is still unclear,which is limiting the development of catalysts containing boron for ***,NRR on different boron-doped twodimensional(2D)materials was explored by first principle *** is found that adsorption energy of intermediate*NNH(E*NNH)can be used as a descriptor to characterize the catalytic activity for ***-adsorbed black phosphorus(B-BP)is demonstrated showing excellent NRR catalytic activity and suppressing hydrogen evolution *** is disclosed that the excellent catalytic performance of boron-doped structures comes from a proper quantitatively electron transfer(0.8e)between nitrogen in*NNH and the active site boron *** work not only established a descriptor for NRR catalytic activity on B-doped 2D materials,but also screened out a potential NRR *** importantly,the intrinsic reason and mechanism of high catalytic activity of boron-doped structures were *** work provides a design principle for exploring high-performance NRR electrocatalysts containing boron.

关键词： Electrocatalytic nitrogen reduction reaction Boron-doped two-dimensional materials Descriptor Density functional theory

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Temperature-dependent self-trapped exciton emission in Cu(I) doped zinc-based metal halides from well-resolved excited state structures

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Nano Research 2024年第8期17卷 7768-7775页

作者： Yunlong Bai Shuai Zhang Nengneng Luo Bingsuo Zou Ruosheng Zeng State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures School of Physical Science and TechnologyGuangxi UniversityNanning 530004China

Zero-dimensional metal halides are of unique structures and tunable photoluminescence properties,showing great potential applications such as light-emitting diodes(LEDs)and ***,we successfully synthesized Cu^(+)doped(MA)_(2)ZnCl_(4)metal halides by a slow evaporation solvent *** introduction of Cu^(+)results in sky-blue self-trapped exciton emission in(MA)_(2)ZnCl_(4) at 486 nm at room temperature,and a photoluminescence quantum yield is as high as 54.9%.Interestingly,at low temperatures,Cu^(+)-doped(MA)_(2)ZnCl_(4) exhibits two emission peaks located at 482 and 605 nm,*** temperaturedependent dual emission indicates two excited state structures that exist on the triplet excited-state potential energy *** addition,the temperature sensor we fitted has good performance(Sr=1.65%·K^(−1)),which is the first attempt in Cu^(+) doped Znbased metal *** work enriches the family of sky-blue metal halides and provides a promising strategy for building skyblue LEDs.

关键词： sky-blue emission self-trapped exciton metal halides excited state structures temperature sensor

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Stable multi-electron reaction stimulated by W doping VS_(4)for enhancing magnesium storage performance

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Journal of Energy Chemistry 2024年第2期89卷 89-98,I0004页

作者： Yuxin Tian Jiankang Chen Guofeng Wang Bing Sun Alan Meng Lei Wang Guicun Li Jianfeng Huang Shiqi Ding Zhenjiang Li College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOEShandong Key Laboratory of Biochemical AnalysisCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina School of Material Science and Engineering International S&T Cooperation Foundation of Shaanxi ProvinceXi’an Key Laboratory of Green Manufacture of Ceramic MaterialsShaanxi University of Science and TechnologyXi’an 710021ShaanxiChina

Rechargeable magnesium batteries(RMBs)hold promise for offering higher volumetric energy density and safety features,attracting increasing research interest as the next post lithium-ion *** high performance cathode material by inducing multi-electron reaction process as well as maintaining structural stability is the key to the development and application of ***,multielectron reaction occurred in VS_(4)by simple W doping strategy.W doping induces valence of partial V as V^(2+)and V^(3+)in VS_(4)structure,and then stimulates electrochemical reaction involving multi-electrons in 0.5%*** flower-like microsphere morphology as well as rich S vacancies is also modulated by W doping to neutralize structure change in such multi-electron reaction *** fabricated 0.5%W-V-S delivers higher specific capacity(149.3 m A h g^(-1)at 50 m A g^(-1),which is 1.6 times higher than that of VS_(4)),superior rate capability(76 mA h g^(-1)at 1000 mA g^(-1)),and stable cycling performance(1500cycles with capacity retention ratio of 93.8%).Besides that,pesudocapaticance-like contribution analysis as well as galvanostatic intermittent titration technique(GITT)further confirms the enhanced Mg^(2+)storage kinetics during such multi-electron involved electrochemical reaction *** discovery provides new insights into the designing of multi-electron reaction process in cathode as well as neutralizing structural change during such reaction for realizing superior electrochemical performance in energy storage devices.

关键词： Multi-electron reaction W doping Stable structure Cathode Rechargeable magnesium batteries

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SEOE:an option graph based semantically embedding method for prenatal depression detection

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Frontiers of Computer science 2024年第6期18卷 245-258页

作者： Xiaosong HAN Mengchen CAO Dong XU Xiaoyue FENG Yanchun LIANG Xiaoduo LANG Renchu GUAN College of Computer Science and Technology Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of EducationJilin UniversityChangchun 130012China Department of Electrical Engineering and Computer Science and Christopher S.Bond Life Sciences Center University of MissouriColumbiaMO 65211USA Department of Computer Science and Technology Zhuhai Laboratory of Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of EducationZhuhai College of Science and TechnologyZhuhai 519041China Jilin Provincial Institute of Population Science and Technology Changchun 130000China

Prenatal depression,which can affect pregnant women’s physical and psychological health and cause postpartum depression,is increasing ***,it is essential to detect prenatal depression early and conduct an attribution *** studies have used questionnaires to screen for prenatal depression,but the existing methods lack *** diagnose the early signs of prenatal depression and identify the key factors that may lead to prenatal depression from questionnaires,we present the semantically enhanced option embedding(SEOE)model to represent questionnaire *** can quantitatively determine the relationship and patterns between options and *** first quantifies options and resorts them,gathering options with little difference,since Word2Vec is highly dependent on *** resort task is transformed into an optimization problem involving the traveling salesman ***,all questionnaire samples are used to train the options’vector using ***,an LSTM and GRU fused model incorporating the cycle learning rate is constructed to detect whether a pregnant woman is suffering from *** verify the model,we compare it with other deep learning and traditional machine learning *** experiment results show that our proposed model can accurately identify pregnant women with depression and reach an F1 score of *** most relevant factors of depression found by SEOE are also verified in the *** addition,our model is of low computational complexity and strong generalization,which can be widely applied to other questionnaire analyses of psychiatric disorders.

关键词： questionnaire analyses text classification graph representation learning traveling salesman problem prenatal depression

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Solid-state atomic hydrogen as a broad-spectrum RONS scavenger for accelerated diabetic wound healing

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National science Review 2024年第2期11卷 196-206页

作者： Man Luo Qin Wang Gang Zhao Wei Jiang Cici Zeng Qingao Zhang Ruyu Yang Wang Dong Yunxi Zhao Guozhen Zhang Jun Jiang Yucai Wang Qing Zhu Key Laboratory of Precision and Intelligent Chemistry School of Chemistry and Materials Science University of Science and Technology of China Department of Radiology The First Affiliated Hospital of University of Science and Technology of China Division of Life Sciences and Medicine University of Science and Technology of China Shenzhen Senior High School Institute of Intelligent Innovation Henan Academy of Sciences

Hydrogen therapy shows great promise as a versatile treatment method for diseases associated with the overexpression of reactive oxygen and nitrogen species（RONS）. However, developing an advanced hydrogen therapy platform that integrates controllable hydrogen release, efficient RONS elimination, and biodegradability remains a giant technical challenge. In this study, we demonstrate for the first time that the tungsten bronze phase H0.53WO3（HWO） is an exceptionally ideal hydrogen carrier, with salient features including temperature-dependent highly-reductive atomic hydrogen release and broad-spectrum RONS scavenging capability distinct from that of molecular hydrogen. Moreover, its unique p H-responsive biodegradability ensures post-therapeutic clearance at pathological sites. Treatment with HWO of diabetic wounds in an animal model indicates that the solid-state atomic H promotes vascular formation by activating M2-type macrophage polarization and anti-inflammatory cytokine production, resulting in acceleration of chronic wound healing. Our findings significantly expand the basic categories of hydrogen therapeutic materials and pave the way for investigating more physical forms of hydrogen species as efficient RONS scavengers for clinical disease treatment.

关键词： atomic hydrogen RONS scavenger inflammatory regulation diabetic wound healing hydrogen therapy

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Perforated plate ventilation system and dynamics of infectious respiratory particle transmission

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International Journal of Mechanical System Dynamics 2024年第4期4卷 497-514页

作者： Caiyue Song Mengmeng Cheng Benben Kong Zhuo Zeng Nenglin Yuan Hong Shi College of Energy&Power Engineering Jiangsu University of Science and TechnologyZhenjiangChina Key Laboratory of Aircraft Environment Control and Life Support MIITNanjing University of Aeronautics&AstronauticsNanjingChina

With the removal of indoor pollutants and the assurance of air quality emerging as critical research topics,the optimization of the internal environment in offices,where people stay for extended periods,is essential for controlling the spread of infectious respiratory *** movements of personnel and the operation of doors and windows within offices significantly impact the mechanisms of droplet transmission,warranting further *** study employs computational fluid dynamics simulations to explore the droplet dispersion characteristics and pollutant removal efficiency of the simplified model of perforated plate ventilation system(PPVS)(the diameter of the air supply openings has been reasonably simplified and uniformly set to 0.02 m)in office settings,as well as the impact of dynamic door operation scenarios on droplet spread and concentrations in breathing *** optimize the ventilation system's pollutant removal efficiency,airflow velocities(2.86,3.18,and 5.00m/s)are varied,with simulations conducted at the optimal velocity of 3.18 m/*** effects of continuous door operations,door-opening directions(towards the office and towards the isolation room),and opening speeds(π/4,π/6,π/8,andπ/10 rad/s)are also examined,revealing significant impacts on droplet *** indicate that PPVS effectively reduces indoor pollutant concentrations at all tested airflow velocities,with the optimal speed identified as 3.18 m/***,door-opening direction and speed can significantly influence droplet *** doors towards isolation rooms at smaller angles(less than 30°)effectively reduces droplet concentrations in personnel breathing zones,thereby mitigating the risk of droplet *** door-opening speeds also contribute to lower droplet concentrations in these *** innovative study explores the impacts of PPVS and dynamic door operation dynamics on droplet transmission during respiratory disease outbreaks,providing

关键词： dynamic simulation indoor pollutant infectious respiratory particles perforated plate ventilation system

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Stereoscopic Imaging of Single Molecules at Plasma Membrane of Single Cell Using Photoreduction-Assisted Electrochemistry

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Research 2025年第1期7卷 975-983页

作者： Rong Jin Yu Li Yanyan Xu Lei Cheng Dechen Jiang State Key Laboratory of Analytical Chemistry for Life Science and School of Chemistry and Chemical Engineering Nanjing UniversityNanjingChina College of Engineering and Technology Southwest UniversityChongqingChina

Stereoscopic imaging of single molecules at the plasma membrane of single cell requires spatial resolutions in 3 dimensions(x-y-z)at 10-nm level,which is rarely achieved using most optical super-resolution ***,electrochemical stereoscopic microscopy with a detection limit down to a single molecule is achieved using a photoreduction-assisted cycle inside a 20-nm gel electrolyte nanoball at the tip of a *** the basis of the electrochemical oxidation of Ru(bpy)_(3)^(2+)into Ru(bpy)33+followed by the reduction of Ru(bpy)_(3)^(3+)into Ru(bpy)_(3)^(2+)by photogenerated isopropanol radicals,a charge of 1.5 fC is obtained from the cycling electron transfers involving one Ru(bpy)_(3)^(2+/3+)*** using the nanopipette to scan the cellular membrane modified with Ru(bpy)_(3)^(2+)-tagged antibody,the morphology of the cell membrane and the distribution of carcinoembryonic antigen(CEA)on the membrane are electrochemically visualized with a spatial resolution of 14 *** resultant stereoscopic image reveals more CEA on membrane protrusions,providing direct evidence to support easy access of membrane CEA to intravenous *** breakthrough in single-molecule electrochemistry at the cellular level leads to the establishment of high-resolution 3-dimensional single-cell electrochemical microscopy,offering an alternative strategy to remedy the imperfection of stereoscopic visualization in optical microscopes.

关键词： stereoscopic imaging electrochemical oxidation plasma membrane photoreduction assisted electrochemistry single molecules stereoscopic microscopy

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Tough Hydrogen Bonding Crosslinked Poly(3-fluorothiophene)Network via Electrosynthesis for High-performance Electrochromic Supercapacitors

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Chinese Journal of Polymer science 2024年第11期42卷 1749-1757,I0011页

作者： Chun-Hui Du Yu-Hua Xu Hui Li Zhi-Xin Wu Han-Jun Yang Xi-Mei Liu Bao-Yang Lu Guang-Ming Nie Ge Zhang Jiangxi Key Lab of Flexible Electronics Flexible Electronics Innovation InstituteJiangxi Science&Technology Normal UniversityNanchang330013China Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science MOEState Key Laboratory Base of Eco-chemical EngineeringCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042China

As a type of bi-functional device,electrochromic supercapacitors(EC-SCs)have attracted extensive attention in diverse applications such as flexible ***,despite recent encouraging progress,rational design and development of high-performance EC-SC materials with desirable stability remain challenging for practical ***,we propose a fluorination strategy to develop high-performance EC-SC materials with tough hydrogen bonding cross-linked intermolecular polymer network by one-step electrosynthesis of *** electrosynthesized free-standing poly(3-fluorothiophene)(PFT)films simultaneously achieve high electrochromic performance(optical contrast 42%at 560 nm with reversible color changes between purple and blue),and good capacitance property(290 F·g^(-1),1 A·g^(-1)),as well as outstanding cyclic stability(<2%reduction after 20000 cycles).We further demonstrate the fabrication of PFT-based flexible electrochromic supercapacitor devices(FESDs),and the resultant devices can be used to visually monitor the energy storage state in real-time and maintain outstanding stability under mechanical distortion like *** a tough fluorination hydrogen bonding cross-linking strategy may provide a new design concept for high-performance EC-SC materials and reliable FESDs toward practical applications.

关键词： Flexible electrochromic-supercapacitors Conducting polymers Hydrogen bonding crosslinking Electrosynthesis Polythiophene

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Rich {1 0 0} faceted Pt Ir W nanocubes with high-filling bonding orbitals of NH2 dimerization for enhancing electrochemical ammonia oxidation

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Journal of Energy Chemistry 2025年第4期103卷 361-370页

作者： Xiaoting Huang Jiawang Li Huanzheng Yang Tao Zhou Yuanyan Luo Shui Yu Jia Liu Pei Kang Shen Luwei Chen Zhi Qun Tian Collaborative Innovation Center of Sustainable Energy Materials School of Physical Science and Technology Guangxi University Guangxi Key Laboratory of Electrochemical Energy Materials State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Institute of Sustainability for Chemicals Energy and Environment (ISCE2) Agency for Science Technology and Research (A*STAR)

Efficiently utilizing ammonia（carbon-free fuel） via low-temperature fuel cells is severely hindered by the sluggish kinetics of ammonia oxidation reaction（AOR）.Herein,platinum-iridium-tungsten nanocubes（PtIrW-NCBs） with exposed {100}-rich facets were synthesized by a glucose-assisted solvent-thermal method,in which alloying W not only can facilitate the formation of such specific nanostructures to expose more active sites for AOR,but also modulate the electronic structure of PtIr to promote the kinetics of *** PtIrW-NCBs featuring the small nanoparticle size of 5.05±0.07 nm exhibit superior AOR performance,wherein the onset potential is down to 0.319 V and the mass activity is 30.15 A g（PGM=Pt,Ir）-1at 0.50 V ***,significantly higher than those of reported majority of AOR catalysts and even commercial PtIr/***,in situ Fourier transform infrared spectroscopy measurement further reveals that AOR on PtIrW-NCBs dominantly undergoes the dimerization path of NHx（1≤x≤2）.In addition,the theoretical calculations also identify that alloying W into PtIr can contribute additional electrons to 5d orbitals of PtIr,enabling the d-band center approaching the Femi level,which in turn induces the high-filling of bonding orbitals of N-N bond in*N2H4,promoting the dimerization of*NH2to*N2H4and thus leading to high AOR activity of *** work provides new insights for designing efficient AOR electrocatalysts.

关键词： Ammonia oxidation reaction Fuel cell Nanocubes PtIrW

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Identification and functional analysis of CG3526 in spermatogenesis of Drosophila melanogaster

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Insect science 2024年第1期31卷 79-90页

作者： Qihao Hu Yanhong Xiao Runnan Wei Ting Tang Liang Wen Yuzhen Lu Xiao-Qiang Yu Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology Guangzhou Key Laboratory of Insect Development Regulation and Application ResearchInstitute of Insect Science and TechnologySchool of Life SciencesSouth China Normal UniversityGuangzhou510631 China

Spermatogenesis is a critical part of reproduction in insects;however,its molecular mechanism is still largely *** this study,we identified a testis-specific gene CG3526 in Drosophila *** analysis showed that CG3526 contains a zinc binding domain and 2 C2H2 type zinc fingers,and it is clustered to the vertebrate really interesting new gene(RING)family E3 ubiquitin-protein *** CG3526 was knocked down by RNA interference(RNAi),the testis became much smaller in size,and the apical tip exhibited a sharp and thin end instead of the blunt and round shape in the control *** importantly,compared to the control flies,only a few mature sperm were present in the seminal vesicle of C587-Gal4>CG3526 RNAi *** staining of the testis from CG3526 RNAi flies showed that the homeostasis of testis stem cell niche was disrupted,cell distribution in the apical tip was scattered,and the process of spermatogenesis was not ***,we found that the phenotype of CG3526 RNAi flies’testis was similar to that of testis of Stat92E RNAi flies,the expression level of CG3526 was significantly downregulated in the Stat92EF06346 mutant flies,and the promoter activity of CG3526 was upregulated by *** together,our results indicated that CG3526 is a downstream effector gene in the JAK-STAT signaling pathway that plays a key role in the spermatogenesis of Drosophila.

关键词： CG3526 JAK-STAT spermatogenesis STAT92E testis

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