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Identifying the dynamic behaviors in complete reconstruction of Co-based complex precatalysts during electrocatalytic oxygen evolution

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Journal of Energy Chemistry 2025年第1期100卷 226-233页

作者： Jingfang Zhang Danyang Wu Linke Cai Youluan Lu Fanpeng Cheng Lijuan Shi Qun Yi Yao Liu Yi Huang Key Laboratory of Green Chemical Engineering Process of ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology School of Chemical Engineering & Pharmacy Wuhan Institute of Technology Key Laboratory of Pesticide & Chemical Biology of ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of Education College of Chemistry Central China Normal University College of Materials Science and Engineering Fuzhou University

Transition metal-based nanomaterials have emerged as promising electrocatalysts for oxygen evolution reaction（OER）. Considerable research efforts have shown that self-reconstruction occurs on these nanomaterials under operating conditions of OER process. However, most of them undergo incomplete reconstruction with limited thickness of reconstruction layer, leading to low component utilization and arduous exploration of real catalytic mechanism. Herein, we identify the dynamic behaviors in complete reconstruction of Co-based complexes during OER. The hollow phytic acid（PA） cross-linked CoFe-based complex nanoboxes with porous nanowalls are designed because of their good electrolyte penetration and mass transport ability, in favor of the fast and complete reconstruction. A series of experiment characterizations demonstrate that the reconstruction process includes the fast substitution of PA by OH-to form Co（Fe）(OH)xand subsequent potential-driven oxidation to Co（Fe）OOH. The obtained CoFeOOH delivers a low overpotential of 290 mV at a current density of 10 mA cm-2and a long-term *** experiment results together with theory calculations reveal that the Fe incorporation can result in the electron rearrangement of reconstructed CoFeOOH and optimization of their electronic structure,accounting for the enhanced OER activity. The work provides new insights into complete reconstruction of metal-based complexes during OER and offers guidelines for rational design of high-performance electrocatalysts.

关键词： Complete reconstruction Co-based complex Precatalysts Oxygen evolution reaction

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Evaluating the impacts of converting grain to vegetable fields on nitrate transport in the deep vadose zone of the North China Plain

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Journal of Geographical Sciences 2025年第1期 189-212页

作者： LIU Meiying MIN Leilei WU Lin ZHANG Yucui QI Yongqing WANG Shiqin LIU Binbin GENG Di SHEN Yanjun Hebei Key Laboratory of water-Saving Agriculture Key Laboratory of Agricultural Water ResourcesCenter for Agricultural Resources ResearchInstitute of Genetics and Developmental BiologyCAS School of Advanced Agricultural Sciences University of Chinese Academy of Sciences

Nitrate （NO3-） accumulation and transport processes in the thick vadose zone affect the evolution of the groundwater NO3-content in intensive agricultural *** land-use change （ALUC）,typically accompanied by substantial alterations in nitrogen fertilizer application and irrigation practices,is an important influencing *** study evaluated the changes in NO3-accumulation and transport in the deep vadose zone （DVZ,below the root zone）,and the groundwater NO3-content associated with ALUC from grain to vegetable fields in the North China Plain （NCP）.The ALUC from grain to vegetable resulted in nitrate–nitrogen （NO3--N） accumulation in DVZ increased by 235.5 kg ha-1m-1（163.2%） in the piedmont plain and 224.9 kg ha-1m-1（102.7%） in the central plain,*** change accelerated downward transport velocity in the DVZ (from 0.81±0.47 to 0.89±0.55 m yr-1in the piedmont plain,and from 0.24±0.12 to 0.92±0.12 m yr-1in the central plain) and increased NO3-leaching *** transport velocity and leaching fluxes resulted in chemical N-fertilizer entering the aquifer in several areas in the piedmont *** impact of the agricultural activity intensity changes,accompanied by the ALUC,on groundwater quantity and quality should be considered in similar regions.

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Design of a cationic accelerator enabling ultrafast ion diffusion kinetics in aqueous zinc-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 377-384页

作者： Yawei Xiao Qianqian Gu Haoyu Li Mengyao Li Yude Wang National center for International Research on Photoelectric and Energy Materials School of Materials and Energy Yunnan University Key Laboratory of ministry of Education for Advanced Materials in Tropical Island resources School of Chemistry and Chemical Engineering Hainan University College of Chemical Engineering Fuzhou University Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies Yunnan University

Aqueous zinc-ion batteries are highly favored for grid-level energy storage owing to their low cost and high safety,but their practical application is limited by slow ion *** address this,a strategy has been developed to create a cation-accelerating electric field on the surface of the cathode to achieve ultrafast Zn2+diffusion *** employing electrodeposition to coat MoS2on the surface of BaV6O16·3H2O nanowires,the directional built-in electric field generated at the heterointerface acts as a cation accelerator,continuously accelerating Zn2+diffusion into the active *** optimized Zn2+diffusion coefficient in CC@BaV-6O16·3H2O@MoS2(7.5×10～8cm2s-1) surpasses that of most reported V-based ***,MoS2serving as a cathodic armor extends the cycling life of the Zn-CC@BaV6O16·3H2O@MoS2full batteries to over 10000 *** work provides valuable insights into optimizing ion diffusion kinetics for high-performance energy storage devices.

关键词： Internal electric field Cationic accelerator Ion diffusion kinetics Cathode modification strategy Aqueous zinc ion battery

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Theories and calculation methods for regional objective ET(evapotranspiration):Applications

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Science China(Technological Sciences) 2009年第5期52卷 1390-1396页

作者： LIU JiaHong QIN DaYong WANG MingNa LüJinYan SANG XueFeng ZHANG RuiMei China Institute of water resources and Hydropower Research Beijing 100044China Research center on water resources and Ecology of the ministry of water resources of China Beijing 100044China

The regional objective ET(evapotranspiration) is defined as the quantity of water that could be con-sumed in a particular *** varies with the water conditions and economic development stages in the *** is also constrained by the requirement of benign environment *** the same time,it must meet the demands of sustainable economic growth and the construction of harmony *** ET based water resources distribution will replace the conventional method,which empha-sizes the balance between the water demand and the water *** puts focus on the reasonable water consumption instead of the forecasted water demand,which is usually greater than the actual *** this paper,we calculated the objective ET of 2010 year level in Tianjin by an analysis-integra-tion-assessment *** ET can be classified into two parts:controllable ET and uncontrol-lable *** ET includes the ET from irrigation land and the ET from resident land,among which the former can be calculated with soil moisture model and evapotranspiration model,while the latter can be calculated by water use ration and water consumption *** uncontrollable ET can be calculated with the distributed hydrological model and the remote sensing monitoring *** two models can be mutually *** this paper,eight schemes are put forward based on different portfolios of water *** objective ET of each scheme was calculated and the results were assessed and ***,an optimal scheme was recommended.

关键词： objective ET(evapotranspiration) water resources management application Tianjin

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Flash flood hazard mapping: A pilot case study in Xiapu River Basin, China

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water Science and Engineering 2015年第3期8卷 195-204页

作者： Da-wei Zhang Jin Quan Hong-bin Zhang Fan Wang Hong Wang Xiao-yan He China Institute of water resources and Hydropower Research Research center on Flood and Drought Disaster Reduction Ministry of Water Resources

Flash flood hazard mapping is a supporting component of non-structural measures for flash flood prevention. Pilot case studies are necessary to develop more practicable methods for the technical support systems of flash flood hazard mapping. In this study, the headwater catchment of the Xiapu River Basin in central China was selected as a pilot study area for flash flood hazard mapping. A conceptual distributed hydrological model was developed for flood calculation based on the framework of the Xinanjiang model, which is widely used in humid and semi-humid regions in China. The developed model employs the geomorphological unit hydrograph method, which is extremely valuable when simulating the overland flow process in ungauged catchments, as compared with the original Xinanjiang model. The model was tested in the pilot study area, and the results agree with the measured data on the whole. After calibration and validation, the model is shown to be a useful tool for flash flood calculation. A practicable method for flash flood hazard mapping using the calculated peak discharge and digital elevation model data was presented, and three levels of flood hazards were classified. The resulting flash flood hazard maps indicate that the method successfully predicts the spatial distribution of flash flood hazards, and it can meet the current requirements in China.

关键词： Flash flood hazard mapping Conceptual distributed hydrological model Xinanjiang model Geomorphological unit hydrograph Xiapu River Basin

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Coupling effect analysis of dam break flood spread and building collapse based on numerical simulation

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Science China(Technological Sciences) 2024年第11期67卷 3571-3584页

作者： SONG TianXu LIU JiaHong MEI Chao ZHANG MengXue WANG Hao NAZLI Sana State Key Laboratory of Simulation and Regulation of water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China Key Laboratory of River Basin Digital Twinning of ministry of water resources Beijing 100038China Engineering and Technology Research center for water resources and Hydrogeology of the ministry of water resources Beijing 100044China

Large-scale floods induced by dam failures could cause significant structural damage to buildings and massive loss of *** coupling effect of large-scale flood spread and building collapse has complex impacts on the entire flow field,affecting flood risk assessment and building vulnerability *** this paper,a dynamic elevation change model designed to seamlessly interface with a structural vulnerability assessment model to investigate the interaction effect between floods and buildings is *** efficiency of the framework was validated by reconstructing the Gleno Dam-Break flood in ***,a hydrodynamic model of the Jinsha-Yalong River that considers dynamic building collapse was *** proposed model was compared with two traditional building treatment approaches and one that ignored the *** results show that the interaction between the flood and buildings decreases the low-velocity area(below 1 m/s)by 7.44%-9.56%while increasing the high velocity area(above 4 m/s)by 10.71%-11.96%.Traditional and neglecting building treatments provide preliminary insights into densely built areas,and the latter could be an alternative for simplification because it can represent the worst-case *** collapse in response to large-scale floods typically occurs in four stages:flood spread,rapid expansion,gradual expansion,and flood *** analysis offers novel perspectives on flood prediction and simulations where the floodplain may contain *** method could be useful for assessing structural vulnerability associated with large building stocks and developing flood mitigation strategies in densely populated areas.

关键词： dam break flood risk structural vulnerability building collapse urban area

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Urban flood inundation and damage assessment based on numerical simulations of design rainstorms with different characteristics

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Science China(Technological Sciences) 2020年第11期63卷 2292-2304页

作者： MEI Chao LIU JiaHong WANG Hao LI ZeJin YANG ZhiYong SHAO WeiWei DING XiangYi WENG BaiSha YU YingDong YAN DianYi State Key Laboratory of Simulation and Regulation of water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China Engineering and Technology Research center for water resources and Hydroecology of the ministry of water resources Beijing 100044China

In the context of global climate change and urbanization,urban flooding is an important type of natural disaster that affects urban development,especially in China,which is experiencing rapid *** the past 10 years,urban flooding events have caused huge disaster losses in Chinese *** has resulted in significant negative effects on the urban infrastructure,socioeconomic systems,and urban residents,thus causing widespread *** have confirmed the change in extreme rainstorms is due to the changing environments in many cities *** studies on the impact of these rainstorms with different characteristics for urban flooding is valuable for coping with unfavorable *** addition,numerical simulations provide an economical and viable means to perform these *** paper presents a numerical model of Xiamen Island in *** were conducted for 12 design rainstorm events with different return periods,rain patterns,and *** results indicate that,in the case of an equal rainfall amount,the rainfall intensity is the key factor that affects the inundated area,depth,and ***,the rainfall intensity is not the only determining factor;the rainfall pattern also affects the *** regard to the rainfall pattern,a higher rainfall peak coefficient usually leads to severe urban inundation and *** a result,the lag time would be shorter,which may further exacerbate the impact of urban flood *** results of this study provide insights into managing flood risks,developing urban flood prevention strategies,and designing flood prevention measures.

关键词： urban flood flood damage assessment flood disaster management numerical simulations design rainstorms

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Dualistic water cycle pattern and its evolution in Haihe River basin

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Chinese Science Bulletin 2010年第16期55卷 1688-1697页

作者： LIU JiaHong QIN DaYong WANG Hao WANG MingNa YANG ZhiYong China Institute of water resources and Hydropower Research Beijing 100038 China Research center for water resources and Ecology of the ministry of water resources Beijing 100044 China

The Haihe River basin is widely recognized as an area in China which is most severely affected by human *** water resources utilization and recycling in the basin is very complex, and the characteristic of the dualistic water cycle is becoming more and more *** ever-growing demand of water for modern industry and domestic life nearly dries up all the natu-ral ***, industrial, agricultural and domestic wastewater discharges cause severe deterioration in water ***, many of water courses are either dried out or being heavily *** water resources management can no longer rely on the "monitoring-rehabilitation" model which was originally developed based on the natural water *** paper analyzes the critical characteristics, water balance, and evolution of water flux process based on the theory of dualistic water *** to the water cycle in the Haihe River basin, a schematic diagram was drawn to describe the dualistic water cycle *** different parameters affecting mainly the evolution of water flux in the "dualistic water cycle" are closely examined using the newly-collected *** a result, this paper proposes several water management and control strategies to achieve healthy wa-ter status for the Haihe River basin.

关键词：水资源利用海河流域循环模式二元演化家庭生活现代工业水资源管理

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Effects of patchy distributed Artemisia capillaris on overland flow hydrodynamic characteristics

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International Soil and water Conservation Research 2019年第1期7卷 81-88页

作者： Guanhua Zhang Jiajun Hu Soil and water Conservation Department Changjiang River Scientific Research InstituteChina Research center on Mountain Torrent&Geologic Disaster Prevention of ministry of water resources China Changjiang water resources Commission of the ministry of water resources Wuhan 430010China

Laboratory-simulated rainfall experiments were conducted to quantify the effects of patchy distributed Artemisia capillaris on overland flow *** intensities of 60,90,120,and 150 mm h-1 were applied on a bare plot (CK) and four different patched patterns:a checkerboard pattern (CP),a banded pattern perpendicular to slope direction (BP),a single long strip parallel to slope direction (LP),and a pattern with small patches distributed like the letter'X'(XP).Each patterned plot underwent two sets of experiments,intact plant and root (the above-ground parts were removed),*** showed that flow velocity increased with rainfall intensity,and the lower slope velocity was higher than the upper *** removal of grass shoots significantly increased flow *** contributions of grass shoots and roots to the reductions in flow velocity under different rainfall intensities were *** shoots made greater contribution of 53-97% at 60 and 90 mm h-1,and the roots contributed more (51-81%) at 120 and 150 mm *** flow depth increased with rainfall intensity and it declined after the aboveground parts were *** numbers (Re) in this study were 25-80,indicating a laminar flow in the *** numbers (Fr) were ≥ 1 for CK and < 1 for patterned *** of the lower slope was higher than the upper ***-weisbach (f) and Manning (n) friction coefficient ranked in the order of CK < LP < BP/CP/XP with values of grass sections being higher than the bare sections and upper slope higher than the lower slope,and both decreased after removing the grass ***,CP,and XP performed more effectively than LP in retarding flow velocity and increasing hydraulic roughness.

关键词： Overland flow Vegetation pattern Hydrodynamics Soil erosion rate Simulated rainfall

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Theories and calculation methods for regional objective ET

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Chinese Science Bulletin 2009年第1期54卷 150-157页

作者： QIN DaYong LU JinYan LIU JiaHong WANG MingNa China Institute of water resources and Hydropower Research Beijing 100044 China Research center on water resources and Ecology of the ministry of water resources Beijing 100044 China

The regional objective ET (Evapotranspiration) is a new concept in water resources research,which refers to the total amount of water that could be exhausted from a region in the form of vapor per year. The objective-ET based water resources management allocates water to different regions in terms of ET. It controls the water exhausted from a region to meet the objective ET. The regional objective ET must be adapted to fit the region’s local available water resources. By improving the water utilization effi-ciency and reducing the unrecoverable water in the social water circle,it is saved so that water related production is maintained or even increased under the same water consumption conditions. Regional water balance is realized by rationally deploying the available water among different industries,adjusting industrial structures,and adopting new water-saving technologies,therefore to meeting the requirements for groundwater conservation,agricultural income stability,and avoiding environmental damages. Furthermore,water competition among various departments and industries (including envi-ronmental and ecological water use) may be avoided. This paper proposes an innovative definition of objective ET,and its principles,sub-index systems. Besides,a computational method for regional ob-jective ET is developed by combining the distributed hydrological model and the soil moisture model.

关键词：蒸发作用水资源管理分布式水文学模型土壤潮湿模型

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