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Interfacial Ru nanoclusters in tandem with single atoms on oxygen-vacancy regulated CeO_(2)for anion exchange membrane seawater-splitting

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Journal of Energy Chemistry 2025年第3期102卷 618-627页

作者： Yue Wang Jing Li Pengfei Yang Hongdong Li Guangrui Xu Yunmei Du Caixia Li Wei Jin Tianyi Ma Zexing Wu Lei Wang Key Laboratory of Eco-chemical Engineering Ministry of EducationInternational Science and Technology Cooperation Base of Eco-chemical Engineering and Green ManufacturingCollege of Chemistry and Molecular EngineeringCollege of Chemical EngineeringQingdao University of Science&TechnologyQingdao 266042ShandongChina College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina College of Materials Science and Engineering Qingdao University of Science&TechnologyQingdao 266042ShandongChina College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009JiangsuChina School of Science STEM CollegeRMIT University 3083VictoriaAustralia

A hydrogen spillover-bridged water dissociation/hydrogen formation could concurrently promote Volmer/Tafel process and improve the efficiency of hydrogen evolution reaction(HER)under alkaline ***,it is still challenging to promote occurrence of hydrogen spillover for the large interfacial transport barriers of H_(2)O and hydrogen on active ***,the strategy of energy barrier gradient to induce hydrogen spillover was proposed by constructing Ru nanoclusters coupled with single atom onto oxygen vacancy cerium dioxide(Ru/CeO_(2)-Ov-2).Density functional theory(DFT)calculations uncover that the adsorption/desorption of H2O occurs at the Ru clusters sites and then the dissociated H*spontaneously overflows from Ru clusters with high binding energy into the adjacent Ru single atom sites with low binding energy,which facilitate the hydrogen ***,the synthesized Ru/CeO_(2)-Ov-2 exhibits a small overpotential of 41 mV at 10 mA cm^(-2)and good stability at 500 mA cm^(-2)for 100 h in alkaline seawater,which could be ascribed to the rapid hydrogen spillover and strong coupling interaction between Ru and CeO_(2)-O_(v).This work provides a novel insight that synthesizing cooperative sites with energy barrier gradient helps to promote hydrogen spillover and accelerate the Volmer/Tafel process of HER.

关键词： Electrocatalyst CeO_(2) Ru Oxygen vacancy Hydrogen evolution reaction

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Polyzwitterionic hydrogel using waste biomass as solar absorbent for efficient evaporation in high salinity brine

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Green Carbon 2025年第1期3卷 50-62页

作者： Liu, Wenzong Wang, Sihui Chen, Zhenglin Yang, Jiaqi Li, Zhiling Wang, Aijie School of Civil & Environmental Engineering Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China Zhejiang Engineering Research Center of Interventional Medicine Engineering and Biotechnology The Fifth Affiliated Hospital of Wenzhou Medical University Lishui 323000 China State Key Laboratory of Urban Water Resources and Environment School of Environment Harbin Institute of Technology Harbin 150090 China

Solar-driven interfacial vapor generation (SVG) is a promising strategy for brine purification. However, the effective combination of functional evaporator backbones and solar absorbers for SVG enhancement remains challenging in high-salinity brines (≥ 10 wt%). Herein, a biomass-based polyzwitterionic hydrogel (PZH) was developed to improve the SVG performances in 10 wt% brine. Zwitterions with specific anti-polyelectrolyte effects served as backbones for accelerating H₂O transportation, with fewer salt deposits and macropore channels. The biomass of straw prepared at a pyrolysis temperature at 600 ℃ was the most effective solar absorber. The synthesis of So600-PZH-8mm yielded the optimal solar evaporator with a low evaporation enthalpy of 877.79 J·g⁻¹, a remarkable solar-to-vapor energy efficiency of 87.1%, and a high evaporation rate of 3.57 kg·m⁻²·h⁻¹ under 1 sun irradiation and a relative humidity of 30%. Multi-cycle evaporation tests further verified the high quality of the steam water, high salt resistance, reliability, and durability of So600-PZH-8mm in practical applications. Furthermore, density functional theory (DFT) calculations of the binding energies of charged groups and ions verified the anti-polyelectrolyte effect and swelling behavior of the PZHs. Overall, this study demonstrated the effectiveness of waste biomass as solar absorber for high-efficiency solar adsorption and water activation, which opens a new perspective to inspire the up-conversion of waste biomass in more valuable and meaningful ways. © 2025 The Authors

关键词： Anti-polyelectrolyte Biomass Evaporation Hydrogel Polyzwitterions

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Diversification of flavonoid accumulation among ecotypes of Agriophyllum squarrosum(L.) Moq. in response to drought stress

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Journal of Arid Land 2025年第4期17卷 538-559页

作者： ZHAO Pengshu YAN Xia QIAN Chaoju MA Guorong FANG Tingzhou YIN Xiaoyue ZHOU Shanshan LIAO Yuqiu SHI Liang FAN Xingke Awuku IBRAHIM MA Xiaofei Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Inland River Ecohydrology Cold and Arid Regions Environmental and Engineering Research Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Gulang County Sand Prevention and Control Technology Promotion Center

Agriophyllum squarrosum(L.) Moq., commonly known as sandrice, is an annual medicinal plant prevalent in the dunes across China's deserts. A garden trial revealed that flavonoid content varies among sandrice ecotypes due to long-term local adaptation to water variability. To investigate how sandrice responds to drought stress through the molecular metabolic regulation of flavonoids, we employed transcriptomic and metabolomic analyses during a 9-d ambient drought stress, examining three ecotypes along a precipitation gradient. The three ecotypes located in Dengkou(DK) County, Dulan(DL) County, and Aerxiang(AEX) village of northern China, which had 137, 263, and 485 mm precipitation, respectively. Soil moisture content was 4.04% after drought stress, causing seedlings of the three sandrice ecotypes to display collapsed structures, yellowing leaves, wilting, and curling. Among these, DL exhibited superior drought tolerance, in which plant height increase(PHI) and leaf area(LA) were significantly higher than those of DK and AEX. Flavonoid-targeted metabolomics identified that rutin, isoquercitrin, and astragalin constituted over 95.00% of the 15 flavonoid metabolites detected. A total of 12 differentially accumulated flavonoids(DAFs) were found, with rutin being the most abundant(1231.57–2859.34 ng/100 mg fresh weight(FW)), showing a gradual increase along the precipitation gradient. Transcriptomic analysis revealed 14 common differentially expressed genes(DEGs) associated with flavonoid synthesis among the three ecotypes. Integrative analysis of DEGs and DAFs indicated that sandrice adapts to drought stress by activating different flavonoid synthesis pathways. In DK, the dihydrokaempferol-dihydroquercetin pathway, regulated by flavonoid 3'-monooxygenase(CYP75B1), likely enhances drought adaptation. In AEX, transcriptional repression by O-methylatransferase(OMT) shifts the metabolic flux from the quercetin-isorhamnetin pathway to the quercetin-isoquercetin-rutin pathway

关键词： drought tolerance ecotype flavonoid medicinal plant rutin

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Impact of aerosol-radiation interaction and heterogeneous chemistry on the winter decreasing PM_(2.5)and increasing O_(3)in Eastern China 2014–2020

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Journal of environmental Sciences 2025年第5期151卷 469-483页

作者： Yasong Li Tijian Wang Qin’geng Wang Mengmeng Li Yawei Qu Hao Wu Min Xie School of the Environment Nanjing UniversityNanjing 210023China School of Atmospheric Sciences Nanjing UniversityNanjing 210023China College of Intelligent Science and Control Engineering Jinling Institute of TechnologyNanjing 211169China Key Laboratory of Transportation Meteorology of China Meteorological Administration Nanjing Joint Institute for Atmospheric SciencesNanjing 210041China School of Environment Nanjing Normal UniversityNanjing 210023China

In the context of the prevalent winter air quality issues in China marked by declining PM_(2.5)and rising O_(3),this study employed amodified WRF-Chem model to examine the aerosol radiation interaction(ARI),heterogeneous chemistry(AHC),and their combined impact(ALL)on the variations in O_(3)and PM_(2.5)during the 2014–2020 in eastern *** analysis confirmed that ARI curtailed O_(3)while elevating PM_(2.5).AHC reduced O_(3)through heterogeneous absorption of NOx and hydroxideswhile notably fostering fine-grained sulfate,resulting in a PM_(2.5)*** reductions mitigated the inhibitory impact of ARI on meteorological fields and photolysis *** reduction individually without aerosol feedback led to a 5.43 ppb O_(3)increase and a 22.89μg/m^(3)PM_(2.5)*** and AHC amplified the emission-reduction-induced(ERI)O_(3)rise by 1.83 and 0.31 ppb,*** response of ARI to emission diminution brought about a modest PM_(2.5)increase of 0.31μg/m^(3).Conversely,AHC,acting as the primary contributor,caused a noteworthy PM_(2.5)decrease of 4.60μg/m^(3).As efforts concentrate on reducing PM_(2.5),the promotion of ARI on PM_(2.5)counterbalanced the efficacy of emission reduction and the AHC-induced strengthening of PM_(2.5)*** ALL magnified the ERI O_(3)increase by 38.9%and PM_(2.5)decrease by 18.7%.Sensitivity experiments with different degrees of emission reduction demonstrated a consistent linear relationship between the ALL-induced enhancement of O_(3)increase and PM_(2.5)decrease to the ERI PM_(2.5)*** investigation revealed the complex connection between emissions and aerosol feedback in influencing air quality.

关键词： Aerosol-radiation interaction Heterogeneous chemistry O_(3)increase PM_(2.5)decrease Emission reduction

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An SPH model reconstruction framework with fragment mapping method for multiplate structure hypervelocity impact simulation

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Advances in Space Research 2025年第11期75卷 8140-8157页

作者： Cao, Xu Zhou, Jianqiu Xu, Huadong Song, Di Miao, Changqing National Key Laboratory of Science and Technology on Advanced Composites in Special Environment Harbin Institute of Technology Harbin150001 China School of Basic Medical Sciences Harbin Medical University Harbin150001 China School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Sichuan Chengdu611731 China

Smoothed Particle Hydrodynamics (SPH) method is widely used in hypervelocity impact analysis, but it is computationally inefficient for common multiplate structures, such as multi-shock, mesh double-bumper, and stuffed shields. To improve the efficiency and accuracy of the SPH method, a reconstruction framework is proposed, including a fragment identification method, a fragment mapping method, and a sequential modeling and simulation approach. In the reconstruction framework, the total impact simulation of a multiplate structure consisting of n plates is decomposed into n individual impacts on each plate. To reduce the computation for each impact, a fragment identification method and a fragment mapping method are developed. Fragments generated from the impact with the i-th plate (i © 2025 COSPAR

关键词： 3D reconstruction

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Theoretical analyses of solute concentration-gradient driven water flow and solute concentration variation in solution-saturated semi-permeable materials

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Science China Technological Sciences 2025年第5期68卷 247-257页

作者： Yao LIU Chongbin ZHAO Bruce HOBBS Alison ORD Xiangtao ZHANG School of Tourism Data Guilin Tourism University Guangxi Key Laboratory of Culture and Tourism Smart Technology Guilin Tourism University Computational Geosciences Research Centre Central South University School of Earth and Environment the University of Western Australia Department of Hydraulic Engineering Tsinghua University

Based on the commonly-used definition of the semi-permeable material(SPM), in which the solvent(such as water)can pass through but the solute cannot move freely, a novel constitutive equation is presented, in this paper, to theoretically express the intrinsic constitutive relationship between the porosity variation rate with time and the solute concentration variation rate with time. From this theoretical finding, a mathematical model is established to describe the solute concentrationgradient driven water flow and solute concentration variation problem in solution-saturated semi-permeable materials(SSSPMs). In particular, the solute concentration variation in the considered problem can be mathematically described as a linear homogeneous second-order partial differential equation with a variable coefficient in the front of the time term. A special mathematical transform is presented and used to solve this equation, so that the analytical solution for the solute concentration variation in the considered problem has been derived in a purely mathematical manner. The derived analytical solution is then used to provide some theoretical understanding of solute concentration variations in the SSSPM layer.

关键词： water flow concentration gradient semi-permeable material theoretical analyses analytical solution mathematical proof

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Remarkable Enhancement of the Activity and Hydrothermal Stability of a CeO2-Based NH3-SCR Catalyst by Sn Modification

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engineering 2025年 48卷 141-150页

作者： Zhu, Ying Liu, Jingjing He, Guangzhi Xie, Shaohua Shan, Wenpo Lian, Zhihua Liu, Fudong He, Hong Center for Excellence in Regional Atmospheric Environment & Key Laboratory of Urban Pollutant Conversion Institute of Urban Environment Chinese Academy of Sciences Xiamen361021 China Zhejiang Key Laboratory of Pollution Control for Port-Petrochemical Industry Ningbo Urban Environment Observation and Research Station Institute of Urban Environment Chinese Academy of Sciences Ningbo315800 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China University of Chinese Academy of Sciences Beijing100049 China Department of Civil Environmental and Construction Engineering Catalysis Cluster for Renewable Energy and Chemical Transformations NanoScience Technology Center University of Central Florida OrlandoFL32816 United States

Catalytic activity and hydrothermal stability are both crucial for the application of the selective catalytic reduction of NOx with NH3 (NH3-SCR) catalyst in diesel vehicles. In this study, a tin (Sn)-modified Ce–Nb mixed-oxide catalyst was synthesized as an NH3-SCR catalyst for NOx emission control. After the introduction of Sn, both the NH3-SCR activity and the hydrothermal stability of the catalyst were remarkably promoted. Even after hydrothermal aging at 1000 °C, the developed Ce1Sn2Nb1Ox catalyst achieved more than 90% NOx conversion at 325–500 °C. Various methods, including N2-physisorption, X-ray diffraction, in-situ high-temperature X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray absorption fine-structure spectroscopy, temperature-programmed reduction of hydrogen, temperature-programmed desorption of ammonia, and density functional theory calculations were used to investigate the promotional effects induced by the Sn species. The characterization results showed that the addition of Sn not only promoted the formation of the Ce–Nb active phase but also improved its thermal stability, contributing to the excellent NH3-SCR performance and hydrothermal stability. This study provides an excellent sintering-resistance catalyst for the application of diesel engine NOx emission control. © 2025 THE AUTHORS

关键词： Temperature programmed desorption

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Research and application of a novel simulation method for evaluating the traversal chance of flying object through the propeller

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Hangkong Dongli Xuebao/Journal of Aerospace Power 2025年第4期40卷

作者： Zhu, Jiawei Yang, Xuehe Chen, Kenlun Lei, Baimao The Fifth Electronics Research Institute of Ministry of Industry and Information Technology Guangzhou511370 China Guangdong Provincial Key Laboratory of Electronic Information Products Reliability Technology The Fifth Electronics Research Institute of Ministry of Industry and Information Technology Guangzhou511370 China The Ministry of Industry and Information Technology Key Laboratory of Quality and Reliability Engineering Technology of Civil Aircraft and Aero-Engine The Fifth Electronics Research Institute of Ministry of Industry and Information Technology Guangzhou511370 China

Chance quantitative analysis of foreign object crossing through the propeller is difficult due to the complexity of propeller shape and foreign object flight attitude，and there is lack of effective technical means for it. A technical method to analyze the chance of cylindrical foreign object crossing the propeller under multiple engineering applications was presented， such as realistic three-dimensional propeller shape and adjustable foreign object flight attitude，etc. The accuracy of the technical method was verified by comparing the difference between the theoretical and simulated chance of foreign object crossing the rectangular blade propeller. Finally， a certain type propeller was selected to carry out the traversal chance simulation. The results showed that， the technical method presented herein had high analytical accuracy， the maximum absolute error and relative error between traversal chance results of simulation and theoretical calculation under ideal model were 0.92% and 1.10%. Respectively， the traversal chance variation trend of a certain type propeller was consistent with the rectangular blade propeller. Under the same impact conditions of foreign object，traversal chance decreased with the increase of aspect ratio and increased with the increase of impact attitude angle. © 2025 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

关键词： Monte Carlo methods

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Optimization on the Preparation Conditions of Fe-N/BC Catalyst and its Pollution Removal Efficiency 6

Optimization on the Preparation Conditions of Fe-N/BC Cataly...

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2024 6th International Conference on Advanced Materials and Ecological environment, AMEE 2024

作者： Zhou, Ting Yang, Yang Du, Tianxing Dong, Wenyi Wang, Hongjie School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen Guangdong Shenzhen518055 China Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control Guangdong Shenzhen518055 China State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Heilongjiang Harbin150090 China

This study was aimed to optimize the preparation conditions of Fe-N/BC catalyst. Citric acid iron and melamine was used to co-doped modified selected biomass, optimized factors included biomass type, acid washing time, iron-nitrogen doping amount and pyrolysis temperature, with nitrobenzene as the targeted degradation object. The optimal preparation conditions for Fe-N/BC iron-nitrogen co-doped biochar catalyst were determined. The results showed that using onion as the biomass, after 8 hours of acid washing, immersed in an ultrasonic solution of citric acid iron with a concentration of 8 g/L for 30 minutes, followed by adding melamine at a doping ratio of 5 g/g biomass and another 30 minutes of ultrasonication, centrifuged, water washed, and dried, then pyrolyzed at 900°C under N2 atmosphere for 1 hour. The obtained Fe-N/BC iron-nitrogen co-doped biochar catalyst exhibited the best removal efficiency for nitrobenzene in a catalytic reduction system, with a removal rate of 96.6% after 15 minutes of reaction. © Published under licence by IOP Publishing Ltd.

关键词： Semiconductor doping

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Study on the Morphological Structure Characteristics of the Modified Preparation Fe-N/BC Catalysts 6

Study on the Morphological Structure Characteristics of the ...

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2024 6th International Conference on Advanced Materials and Ecological environment, AMEE 2024

作者： Yang, Yang Zhou, Ting Du, Tianxing Dong, Wenyi Wang, Hongjie School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen Guangdong Shenzhen518055 China Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control Guangdong Shenzhen518055 China State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Heilongjiang Harbin150090 China

In this study, the citric acid iron and melamine was used to modify the selected biomass, preparing Fe-N/BC iron-nitrogen co-doped biochar catalyst. The BC, N/BC, and Fe-N/BC were characterized by SEM, XRD, FTIR, Raman, XPS, etc., to research the aspects of micromorphology, crystal structure, surface functional group types, and element composition. The results showed that Fe and N elements could be doped into the biochar successfully, making the particle size of Fe-N/BC smaller than that of BC, possessing a bigger surface area with a more abundant pore structure. Additionally, the graphitization degree of Fe-N/BC was enhanced, introducing active sites including pyridinic nitrogen, graphitic nitrogen, and Fe-Nx, enhancing the catalytic activity and electron transfer performance of the catalyst, enabling Fe-N/BC to simultaneously act on catalytic reduction and catalytic oxidation systems. © Published under licence by IOP Publishing Ltd.

关键词： Catalytic oxidation

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