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Synergistic Ru/RuO_(2) heterojunctions stabilized by carbon coating as efficient and stable bifunctional electrocatalysts for acidic overall water splitting

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Nano Research 2024年第8期17卷 6931-6939页

作者： man wu Yuying Fan Yang Huang Dongxu Wang Ying Xie Aiping wu chungui Tian Key Laboratory of Functional Inorganic material chemistry Ministry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin 150080China

The development of highly active and stable acidic water oxidation electrocatalysts is of great significant for promoting the industrial application of proton exchange membrane ***-based catalysts have broad application prospects in acidic water oxidation,but their limitations in stability and activity hinder their further ***,a nitrogen-doped carbon(Nc)coated porous Ru/RuO_(2) heterojunctional hollow sphere(Ru/RuO_(2)/Nc)is designed as high-active and stable bifunctional electrocatalyst for acidic oxygen evolution reaction(OER)and hydrogen evolution reaction(HER).In synthesis,the key is to use mesoporous polydopamine spheres as a template for forming hollow spheres,a source of Nc coating and a reducing agent for forming Ru/RuO_(2) *** Ru/RuO_(2) heterojunction adjusts the electronic structure of Ru active sites,optimizing the adsorption of intermediate ***,the Nc coating and the interaction between Nc and Ru/RuO_(2) effectively prevent Ru from over-oxidation and *** porous hollow structure provides more exposed active sites and promotes mass ***,Ru/RuO_(2)/Nc exhibits outstanding OER and HER performance with low overpotentials of 211 and 32 mV at 10 mA·cm^(−2),respectively,and shows excellent *** acid water splitting electrolyzer,based on the bifunctional Ru/RuO_(2)/Nc,requires low cell voltages of 1.46 and 1.76 V at 10 and 100 mA·cm^(−2),respectively,with good stability for over 100 h operation,surpassing Pt/c||RuO_(2) and most of the reported catalysts.

关键词： hollow heterojunction bifunctional electrocatalysts oxygen evolution hydrogen evolution acidic water splitting

Integration of urchin-like mnco_(2)O_(4)@c core–shell nanowire arrays within porous copper current collector for superior performance Li-ion battery anodes

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Rare metals 2024年第2期43卷 599-611页

作者： Xue-Ru Zhang Qiong wu Yong Zhang Xi-Fei Li Ting Xie Yu-cheng wu Instrumental Analysis center Hefei University of TechnologyHefei230009China Key Laboratory of Advanced Functional materials and Devices of Anhui Province Hefei230009China School of materials Science and Engineering Hefei University of TechnologyHefei230009China Institute of Advanced Electrochemical Energy Xi’an University of TechnologyXi’an710048China

Spinel mnco_(2)O_(4) is a promising energy storage candidate as anode materials in lithium-ion batteries owing to synergistic effects of two intrinsic solid-state redox ***,low conductivity,poor rate capacity and rapid capacity fading have seriously impaired its practical *** overcome the inferiorities,urchin-like mnco_(2)O_(4)@c core–shell nanowire arrays have been fabricated directly within a porous copper current collector via a facile hydrothermal method followed by a chemical vapor deposition carbonization *** a typical nanowire,the core is composed of interconnected mnco_(2)O_(4)nanoparticles and the shell shows as a thin amorphous carbon *** integrated mnco_(2)O_(4)@c/cu structure could act as working anodes without using additives or polymer *** mnco_(2)O_(4)@c/cu possesses slightly longer Li-ion insertion/desertion pathway than that of mnco_(2)O_(4)/cu,the carbon shell could effectively prevent the pulverization of mnco_(2)O_(4) and lower down charge transfer resistance and actively participate in Li-ion *** rearrangement of carbon atoms during lithiation/delithiation cycling could inhibit the formation of passive solid electrolyte interphase *** a result,the mnco_(2)O_(4)@c/cu electrode presents superior rate capacity(600 mAh·g^(−1) at 1 A·g^(−1)) and better stability(797 mAh·g^(−1) after 200 cycles at 100 mA·g^(−1)).The excellent reversible Li ion storage capacity,cycling stability and rate capacity endow mnco_(2)O_(4)@c/cu great potential as stable and high output integrated anode materials in Li-ion batteries.

关键词： mnco_(2)O_(4)@c Urchin-like nanowire arrays core-shell Integrated anode materials Lithium-ion batteries

Precise construction of RuPt dual single-atomic sites to optimize oxygen electrocatalytic behaviors for high-performance Zn-air batteries

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Journal of Energy chemistry 2024年第10期97卷 520-528,I0011页

作者： Xiaolin Hu Zhenkun wu chaohe Xu School of Science Chongqing Key Laboratory of New Energy Storage Materials and DevicesChongqing University of TechnologyChongqing 400054China School of chemistry and Engineering Chongqing UniversityChongqing 400044China college of materials Science and Engineering Chongqing UniversityChongqing 400044China

The development of redox bifunctional electrocatalysts with high performance,low cost,and long lifetimes is essential for achieving clean energy *** study proposed an atom capture strategy for anchoring dual single atoms(DSAs)in a zinc-zeolitic imidazolate framework(Zn-ZIF),followed by calcination under an N_(2) atmosphere to synthesize ruthenium-platinum DSAs supported on a nitrogendoped carbon substrate(RuPt DSAs-Nc).Theoretical calculations showed that the degree of Ru 5dxz-~*O 2p_x orbital hybridization was high when^(*)O was adsorbed at the Ru site,indicating enhanced covalent hybridization of metal sites and oxygen ligands,which benefited the adsorption of intermediate *** presence of the RuPtN_6 active center optimized the absorption-desorption behavior of intermediates,improving the electrocatalytic performance of the oxygen reduction reaction(ORR)and the oxygen evolution reaction(DER),RuPt DSAs-Nc exhibited a 0.87 V high half-wave potential and a 268 mV low overpotential at 10 mA cm^(-2)in an alkaline ***,rechargeable zinc-air batteries(ZABs)achieved a peak power density of 171 mW cm^(-2).The RuPt DSAs-Nc demonstrated long-term cycling for up to 500 h with superior round-trip *** study provided an effective structural design strategy to construct DSAs active sites for enhanced electrocata lytic performance.

关键词： Dual single atoms catalysts Atom capture Oxygen reduction reaction Oxygen evolution reaction Rechargeable Zn-air batteries

Sensitivity analysis of modeling parameters to soot and PAHs prediction in ethylene inverse diffusion flame

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Science china(Technological Sciences) 2024年第2期67卷 486-498页

作者： wu BingKun LI TianJiao LIU Dong mIIT Key Laboratory of Thermal control of Electronic Equipment School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China Advanced combustion Laboratory School of Energy and Power EngineeringNanjing University of Science and Technology Nanjing 210094China

The soot formation model based on inverse ethylene diffusion flames was performed to study the sensitivity of the soot formation process to the prediction *** effects of efficiency parameters such as soot inception,surface growth and coagulation on the simulation results were studied by using the adjustable efficiency *** addition,the reversible soot model and conjugate heat transfer(cHT)model were also introduced to explore their *** indicated that,among adjustable efficiency parameters,the nucleation efficiency had the greatest influence on the predicted soot and PAHs distributions,while the Habstraction-c2H2-addition(HAcA)process and PAH adsorption surface growth efficiencies impacted *** adjustable efficiency parameters had a significant effect on the concentration of soot gaseous precursors and soot particles,but their effects on temperature,gas phase molecules,and intermediate species were not *** the nucleation efficiency increased from 2×10^(-6)to 1×10^(-4),the predicted value of the integrated soot was increased by nearly 50%,and the maximum primary particle number density and the number of aggregates were increased by an order of *** maximum concentration of BAPYR was ***,the peak temperature along the axial direction increased by only 3.5 *** the reversible soot model,the approximation results of the adjustable efficiency parameters could be modified,which showed the feasibility of the *** use of the cHT model promoted pyrolysis of the fuel below the outlet of the fuel tube,with high-temperature zones,soot zones,and PAHs zones moving towards higher flame ***,when using the reversible model and the cHT model,the maximum soot volume fraction decreased by 39%compared with the basic efficiency parameters,while the concentration of BAPYR increased by 162%,and the concentrations of gas phase species were decreased.

关键词： inverse diffusion flames soot formation soot model ethylene

Paclitaxel-lipid prodrug liposomes for improved drug delivery and breast carcinoma therapy

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chinese chemical Letters 2024年第2期35卷 335-340页

作者： Xin wu Xinmei chen Xinyu Wang Haisheng He Jianming chen Wei wu Key Laboratory of Smart Drug Delivery of mOE School of PharmacyFudan UniversityShanghai 201203China Department of Pharmacy Fujian University of Traditional Chinese MedicineFuzhou 350122China Shanghai Wei Er Lab Shanghai 201707China Shanghai Skin Disease Hospital Tongji University School of MedicineShanghai 200443China

Paclitaxel(PTX)is widely applied for the treatment of unresectable and metastasis breast carcinoma as well as other cancers,whereas its efficacy is always impeded by poor *** are one kind of the most successful drug carriers which are capable of solubilizing PTX and improving patients’tolerance owing to excellent biocompatibility and ***,poor compatibility between PTX and liposomes compromises the stability,drug loading and anti-tumor capacity of liposomal *** address this issue,three lipids with various chain lengths,namely,myristic acid(mA,14c),palmitic acid(PA,16c)and stearic acid(SA,18c),were conjugated to PTX via ester bonds and the synthesized prodrugs with high lipophilicity were further formulated into liposomes,*** liposomes show high stability and drug loadings,as well as sustained drug *** chain lengths of lipids are negatively correlated with drug release and enzymatic conversion rates,which further impact the pharmacokinetics,tumor accumulation,and anti-tumor efficacy of liposomal *** rapid nor slow drug release facilitates high tumor accumulation as well as anti-tumor efficacy of *** all liposomes,PTX-PA-loaded liposomes show the longest circulation and highest tumor accumulation of PTX and exert the most potent anti-tumor capacities in vivo,owing to its moderate drug release and enzymatic conversion *** its superior safety,PTX-PA liposomes hold potential for further clinical translation.

关键词： Paclitaxel Lipids Prodrugs Liposomes Drug release chemotherapy

combining anodic alcohol oxidative coupling for c-c bond formation with cathodic ammonia production

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National Science Review 2024年第5期11卷 217-226页

作者： Leitao Xu Wei chen cairong Wang Wenjie wu Yelin Yao Zhifeng Huang Jingcheng wu ming Yang Yandong wu Dianke Xie Yuqin Zou Shuangyin Wang State Key Laboratory of chemo/Bio-Sensing and chemometrics College of Chemistry and Chemical EngineeringAdvanced Catalytic Engineering Research Center of the Ministry of Education Hunan University

Electrocatalytic oxidation of alcohols using heterogeneous catalysts is a promising aqueous, energy-efficient and environmentally friendly approach, especially for coupling different alcohols to prolong the carbon chain via co-oxidation. Precisely regulating critical steps to tailor electrode materials and electrolyte composition is key to selectively coupling alcohols for targeted synthesis. However, selectively coupling different alcohols remains challenging due to the lack of effective catalyst and electrolyte design promoting specific pathways. Herein, we demonstrate a paired electrolysis strategy for combining anodic oxidative coupling of ethanol（EtOH） and benzyl alcohol（PhcH2OH） to synthesize cinnamaldehyde（cAL） and cathodic ammonia production. The strategies involve:（i） utilizing the salt-out effect to balance selective oxidation and coupling rates;（ii） developing platinum-loaded nickel hydroxide electrocatalysts to accelerate intermediate coupling kinetics;（iii） introducing thermodynamically favorable nitrate reduction at the cathode to improve coupling selectivity by avoiding hydrogenation of products while generating valuable ammonia instead of hydrogen. We achieved 85% coupling selectivity and 278 μmol/h NH3productive rate at 100 m A/cm2with a low energy input（～1.63 V）. The membrane-free, low energy, scalable approach with a wide substrate scope highlights promising applications of this methodology. This work advances heterogeneous electrocatalytic synthesis through rational design principles that integrate anodic oxidative coupling with cathodic nitrate reduction reactions, having synergistic effects on efficiency and selectivity.

关键词： anodic alcohol oxidative coupling c–c bond formation cinnamaldehyde cathodic ammonia production

Two-Dimensional Perovskite Single crystals for High-Performance X-ray Imaging and Exploring meV X-ray Detection

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Energy & Environmental materials 2024年第1期7卷 139-146页

作者： Xieming Xu Yiheng wu Yi Zhang Xiaohui Li Fang Wang Xiaoming Jiang Shaofan wu Shuaihua Wang Key Laboratory of Optoelectronic materials chemistry and Physics Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of chinese Academy of Sciences Beijing 100049China Division of Nuclear Technology and Applications Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of china Fuzhou 350108China

Scintillation semiconductors play increasingly important medical diagnosis and industrial inspection ***,two-dimensional(2D)perovskites have been shown to be promising materials for medical X-ray imaging,but they are mostly used in low-energy(≤130 keV)*** detection of meV X-rays,which ensure thorough penetration of the thick shell walls of containers,trucks,and aircraft,is also highly desired in practical industrial ***,scintillation semiconductors for high-energy X-ray detection are currently ***,This paper reports a 2D(c_(4)H_(9)NH_(3))_(2)PbBr_(4)single crystal with outstanding sensitivity and stability toward X-ray radiation that provides an ultra-wide detectable X-ray range of between 8.20 nGy_(air)s^(-1)(50 keV)and 15.24 mGy_(air)s^(-1)(9 meV).The(c_(4)H_(9)NH_(3))_(2)PbBr_(4)single-crystal detector with a vertical structure is used for high-performance X-ray imaging,delivering a good spatial resolution of 4.3 Ip mm^(-1)in a plane-scan imaging *** ionic migration in the 2D perovskite enables the vertical device to be operated with hundreds of keV to meV X-ray radiation at high bias voltages,leading to a sensitivity of 46.90μc Gy_(air)-1 cm^(-2)(-1.16 Vμm^(-1))with 9 meV X-ray radiation,demonstrating that 2D perovskites have enormous potential for high-energy industrial applications.

关键词： meV X-ray detection single-crystal X-ray detectors two-dimensional perovskites X-ray imaging

cALTm:A context-Aware Long-Term Time-Series Forecasting model

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computer modeling in Engineering & Sciences 2024年第4期139卷 873-891页

作者： canghong Jin Jiapeng chen Shuyu wu Hao wu Shuoping Wang Jing Ying School of computer and computing Science Hangzhou City UniversityHangzhou310015China School of computer Science and Engineering Macao University of Science and TechnologyMacao999078China college of computer Science and Technology Zhejiang UniversityHangzhou310058China

Time series data plays a crucial role in intelligent transportation *** flow forecasting represents a precise estimation of future traffic flow within a specific region and time *** approaches,including sequence periodic,regression,and deep learning models,have shown promising results in short-term series ***,forecasting scenarios specifically focused on holiday traffic flow present unique challenges,such as distinct traffic patterns during vacations and the increased demand for long-term ***,the effectiveness of existing methods diminishes in such ***,we propose a novel longterm forecasting model based on scene matching and embedding fusion representation to forecast long-term holiday traffic *** model comprises three components:the similar scene matching module,responsible for extracting Similar Scene Features;the long-short term representation fusion module,which integrates scenario embeddings;and a simple fully connected layer at the head for making the final *** results on real datasets demonstrate that our model outperforms other methods,particularly in medium and long-term forecasting scenarios.

关键词： Traffic volume forecasting scene matching multi module fusion

Electric-field-controlled highly regioselective thiocyanation of N-containing heterocycles

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Science china chemistry 2024年第4期67卷 1263-1269页

作者： ming Gong Qian wu Jung Keun Kim mengmeng Huang Yabo Li Yangjie wu Jong Seung Kim Henan Key Laboratory of chemical Biology and Organic chemistry Key Laboratory of Applied Chemistry of Henan UniversitiesCollege of ChemistryZhengzhou UniversityZhengzhou 450052China Department of chemistry Korea UniversitySeoul 02841Korea

Achieving highly regioselective synthesis in organic chemistry is challenging due to the uncontrollable orientation between reacting *** electric fields(EEFs)can influence the reactivity and selectivity of the substrate by causing directional ***,scalable and efficient techniques for using EEFs as“smart catalysts”have been lacking,hindering their *** this study,we present a novel method for modifying the regioselectivity of quinoxaline-2(1H)-ones by functionalizing their c7-position using the electric double layer(EDL)*** approach led to moderate to good yields of the corresponding c7-thiocyanation *** calculations and control experiments demonstrated that EEFs could reverse the regioselectivity of quinoxaline-2(1H)-ones,allowing the c7-thiocyanation to proceed via a radical reaction ***,the resulting 7-thiocyano-1-methylquinoxaline-2(1H)-ones exhibited promising AIE *** work showcases a promising strategy for achieving highly regioselective functionalization by aligning the electric field with the desired reaction/bond axis.

关键词： electric fields reaction-axis rule electric double layer c7-thiocyanation c-S bond formation