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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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Effect of lime application on microbial community in acidic tea orchard soils in comparison with those in wasteland and forest soils

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Journal of Environmental Sciences 2010年第8期22卷 1253-1260页

作者： Dong xue Xiangdong huang Huaiying Yao Changyong huang Zhejiang Provincial Key Laboratory of Subtropic Soil and Plant Nutrition College of Environmental and Resource Sciences Zhejiang University (Huajiachi Campus) Hangzhou 310029 China Department of Environmental and Chemical Engineering Luoyang Institute of Science and Technology Luoyang 471023 China

Lime application is a conventional technology to control acidification in tea orchard soils. We investigated the effect of lime application on soil microbial community diversity in the soils of three tea orchards, wasteland and forest. The BIOLOG data showed that both the average well color development of all carbon sources and the functional diversity index increased with the liming rate in the tea orchards and the forest, but decreased in the wasteland. The phospholipid fatty acid （PLFA） analysis showed that the structural diversity index of soil microbial community increased with the liming rate in all the tea orchards, the wasteland and the forest. Lime application also increased the soil-bacterial PLFA content in all the soils. Soil fungal and actinomycete PLFAs in the tea orchards showed an increasing trend from 0 to 3.2 g CaCO 3 /kg application and then a decreasing trend from 3.2 to 6.4 g CaCO 3 /kg application. The principal component analysis of BIOLOG and PLFA data suggested that lime application had a significant effect on soil microbial community structure, and land use had a greater effect on soil microbial community structure compared to lime application.

关键词： microbial community diversity phospholipid fatty acid lime tea orchard soil

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Surface quality investigation in high-speed dry milling of Ti-6Al-4V by using 2D ultrasonic-vibration-assisted milling platform

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Advances in Manufacturing 2024年第2期12卷 349-364页

作者： Jin Zhang Li ling Qian-Yue Wang xue-Feng huang Xin-Zhen Kang Gui-Bao Tao Hua-Jun Cao College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing400044People’s Republic of China State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing400044People’s Republic of China Aerospace Research Institute of Materials and Processing Technology Beijing100076People’s Republic of China

Ultrasonic-vibration-assisted milling(UVAM)is an advanced method for the efficient and precise machining of difficult-to-machine materials in modern ***,the milling efficiency is limited because the ultrasonic vibration toolholder ER16 collet has a critical cutting ***,a 2D UVAM platform is built to ensure precision machining efficiency and improve the surface quality without changing the milling *** evaluate this 2D UVAM platform,ultrasonic-vibration-assisted high-speed dry milling(UVAHSDM)is performed to process a titanium alloy(Ti-6Al-4V)on the platform,and the milling temperature,surface roughness,and residual stresses are selected as the important indicators for performance *** results show that the intermittent cutting mechanism of UVAHSDM combined with the specific spindle speed,feed speed,and vibration amplitude can reduce the milling temperature and improve the texture of the machined *** with conventional milling,UVAHSDM reduces surface roughness and peak-groove surface profile values and extends the range of residual surface compressive stresses from−413.96 MPa to−600.18 *** excellent processing performance demonstrates the feasibility and validity of applying this 2D UVAM platform for investigating surface quality achieved under UVAHSDM.

关键词： 2D ultrasonic-vibration-assisted milling(UVAM)platform Ultrasonic-vibration-assisted high-speed dry milling(UVAHSDM) Milling temperature Surface roughness Residual stress

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Joint Reducing Subspaces of Multiplication Operators and Weight of Multi-variable Bergman Spaces

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Chinese Annals of Mathematics,Series B 2019年第2期40卷 187-198页

作者： Hansong huang Peng ling Department of Mathematics East China University of Science and Technology School of Mathematics Fudan University

This paper mainly concerns a tuple of multiplication operators defined on the weighted and unweighted multi-variable Bergman spaces, their joint reducing subspaces and the von Neumann algebra generated by the orthogonal projections onto these subspaces. It is found that the weights play an important role in the structures of lattices of joint reducing subspaces and of associated von Neumann algebras. Also, a class of special weights is taken into account. Under a mild condition it is proved that if those multiplication operators are defined by the same symbols, then the corresponding von Neumann algebras are *-isomorphic to the one defined on the unweighted Bergman space.

关键词： Joint reducing subspaces Von Neumann algebras Weighted Bergman spaces

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PDR diagnostics study with CLOUDY

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Chinese Journal of Astronomy and Astrophysics 2009年第4期9卷 457-469页

作者： Rui xue Maohai huang National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China

A series of plane-parallel photodissociation region （PDR） models are calculated using the spectral synthesis code CLOUDY. These models span a wide range of physical conditions, with gas densities of n=10^2-10^6cm^-3 and incident far-ultraviolet （FUV） fields of Go=10^0-10^6 （where Go is the FUV flux in units of the local interstellar value）, which are comparable with various astrophysical environments from interstellar diffuse clouds to the dense neutral gas around galactic compact H Ⅱ regions. Based on the calculated results, we study the thermal balance of PDR gas and the emissions of [C Ⅱ], [C I] and [O I] fine-structure lines under different physical conditions. The intensities and strength ratios of the studied lines, which are frequently used as PDR diagnostics, are presented using contour diagrams as functions of n and Go. We compare the calculated PDR surface gas temperatures Ts with those from Kaufman et al. and find that Ts from our models are systematically higher over most of the adopted n-Go parameter space. The predicated line intensities and ratios from our work and those from Kaufman et al. can be different by a factor greater than 10, and such large differences usually occur near the border of our parameter space. The different methods of treating the dust grain physics, the change of H2 formation and dissociation rates, and the improvement in the radiation transfer of line emissions in our CLOUDY models are likely to be the major reasons for the divergences. Our models represent an up-to-date treatment of PDR diagnostic calculations and can be used to interpret observational data. Meanwhile, the uncertainties in the treatment of microphysics and chemical processes in PDR models have significant effects on PDR diagnostics.

关键词： infrared ISM-ISM clouds-ISM molecules-methods numerical

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High-temperature oxidation behavior of 9Cr‒5Si‒3Al ferritic heat-resistant steel

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International Journal of Minerals,Metallurgy and Materials 2020年第9期27卷 1244-1250页

作者： Jun-jun Yan xue-fei huang Wei-gang huang College of Materials Science and Engineering Sichuan UniversityChengdu 610065China

To improve the oxidation properties of ferritic heat-resistant steels,an Al-bearing 9Cr‒5Si‒3Al ferritic heat-resistant steel was *** then conducted cyclic oxidation tests to investigate the high-temperature oxidation behavior of 9Cr‒5Si and 9Cr‒5Si‒3Al ferritic heat-resistant steels at 900 and 1000℃.The characteristics of the oxide layer were analyzed by X-ray diffraction,scanning electron microscopy,and energy dispersive *** results show that the oxidation kinetics curves of the two tested steels follow the parabolic law,with the parabolic rate constant kp of 9Cr‒5Si‒3Al steel being much lower than that of 9Cr‒5Si steel at both 900 and 1000℃.The oxide film on the surface of the 9Cr‒5Si alloy exhibits Cr2MnO4 and Cr2O3 phases in the outer layer after oxidation at 900 and 1000℃.However,at oxidation temperatures of 900 and 1000℃,the oxide film of the 9Cr‒5Si‒3Al alloy consists only of Al2O3 and its oxide layer is thinner than that of the 9Cr‒5Si *** results indicate that the addition of Al to the 9Cr‒5Si steel can improve its high-temperature oxidation resistance,which can be attributed to the formation of a continuous and compact Al2O3 film on the surface of the steel.

关键词： ferritic heat-resistant steel high-temperature oxidation oxidation kinetics aluminum

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Preparation of FeCoNi medium entropy alloy from Fe^(3+)-Co^(2+)-Ni^(2+)solution system

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 92-101页

作者： Zongyou Cheng Qing Zhao Mengjie Tao Jijun Du Xingxi huang Chengjun Liu Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking(Ministry of Education) Shenyang 110819China

In recent years,medium entropy alloys have become a research hotspot due to their excellent physical and chemical *** controlling reasonable elemental composition and processing parameters,the medium entropy alloys can exhibit similar properties to high entropy alloys and have lower *** this paper,a FeCoNi medium entropy alloy precursor was prepared via sol-gel and coprecipitation methods,respectively,and FeCoNi medium entropy alloys were prepared by carbothermal and hydrogen *** phases and magnetic properties of FeCoNi medium entropy alloy were *** showed that FeCoNi medium entropy alloy was produced by carbothermal and hydrogen reduction at 1500℃.Some carbon was detected in the FeCoNi medium entropy alloy prepared by carbothermal *** alloy prepared by hydrogen reduction was uniform and showed a relatively high ***,the hydrogen reduction product exhibited better saturation magnetization and lower coercivity.

关键词： medium entropy alloy sol-gel co-precipitation carbothermal hydrogen reduction

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Application of the improved dung beetle optimizer,muti-head attention and hybrid deep learning algorithms to groundwater depth prediction in the Ningxia area,China

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 18-23页

作者： Jiarui Cai Bo Sun Huijun Wang Yi Zheng Siyu Zhou Huixin Li Yanyan huang Peishu Zong Collaborative Innovation Center on forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment ChangeNanjing University of Information Science and TechnologyNanjingChina Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiChina China Meteorological Administration Key Laboratory of Transportation MeteorologyNanjingChina Jiangsu Meteorological Observatory NanjingChina

Due to the lack of accurate data and complex parameterization,the prediction of groundwater depth is a chal-lenge for numerical *** learning can effectively solve this issue and has been proven useful in the prediction of groundwater depth in many *** this study,two new models are applied to the prediction of groundwater depth in the Ningxia area,*** two models combine the improved dung beetle optimizer(DBO)algorithm with two deep learning models:The Multi-head Attention-Convolution Neural Network-Long Short Term Memory networks(MH-CNN-LSTM)and the Multi-head Attention-Convolution Neural Network-Gated Recurrent Unit(MH-CNN-GRU).The models with DBO show better prediction performance,with larger R(correlation coefficient),RPD(residual prediction deviation),and lower RMSE(root-mean-square error).Com-pared with the models with the original DBO,the R and RPD of models with the improved DBO increase by over 1.5%,and the RMSE decreases by over 1.8%,indicating better prediction *** addition,compared with the multiple linear regression model,a traditional statistical model,deep learning models have better prediction performance.

关键词： Groundwater depth Multi-head attention Improved dung beetle optimizer CNN-LSTM CNN-GRU Ningxia

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Measurement of self-development capacity in the contiguous destitute mountainous areas, China

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Journal of Mountain Science 2021年第6期18卷 1646-1661页

作者： xue Yao-zu huang Lei School of Humanities and Social Sciences Xi'an Jiaotong UniversityXi'an 710049China Research Institute of Transition of Resource-based Economics Shanxi University of Finance&EconomicsTaiyuan 030006China

Affected by the mountainous location and ecological vulnerability, the incidence of poverty in contiguous destitute mountainous areas is higher than that in other regions of China. Regional selfdevelopment capacity is an internal driving force for poverty reduction in contiguous destitute mountainous areas. This study selects 17 indicators from the four dimensions: industrial capacity, market capacity, spatial capacity and soft power to measure the overall self-development capacity of 658 counties in 14 different mountain areas in China. The results show that self-development capacity is at a low level and the development of the different regions is unbalanced. The self-development capacity is low in the southwest and high in the east and "low in the middle, high around" in each study region. It has achieved a certain degree of improvement in 2011, 2013 and 2015. From the perspective of the four dimensions, industrial capacity is the constraint on the promotion of self-development capacity. Based on this, we should develop green industries in line with local realities and achieve industrial poverty eradication, but the expansion of space capacity should take into account the resources and environmental carrying capacity in these areas and should not be blindly expanded. Local leaders should be made to improve the local education level and public service level, improve social infrastructure, develop reserve strength for the future, and enhance future development potential.

关键词： Regional self-development capacity Contiguous Destitute Mountainous Areas Industrial capacity Market capacity Soft power

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葛根汤干预脊髓型颈椎病模型大鼠神经炎症反应和凋亡的作用

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中国组织工程研究 2025年第20期29卷 4249-4257页

作者：吴迪友黄家俊陶广义赵宇黄俊卿杨彬薛云河南中医药大学河南省郑州市450000 河南省中医院/河南中医药大学第二附属医院河南省郑州市450000

背景:炎症和细胞凋亡在脊髓型颈椎病病理过程中起着关键作用。既往研究表明葛根汤对脊髓型颈椎病有着良好的治疗效果。目的:探讨葛根汤对脊髓型颈椎病大鼠神经炎症反应和细胞凋亡的影响及作用机制。方法:60只SD大鼠随机分为正常组、假... 详细信息

背景:炎症和细胞凋亡在脊髓型颈椎病病理过程中起着关键作用。既往研究表明葛根汤对脊髓型颈椎病有着良好的治疗效果。目的:探讨葛根汤对脊髓型颈椎病大鼠神经炎症反应和细胞凋亡的影响及作用机制。方法:60只SD大鼠随机分为正常组、假手术组、模型组、葛根汤低、中、高剂量组,采用吸水膨胀材料压迫脊髓的方法构建脊髓型颈椎病模型,术后2周给予4.86,9.72,19.44 g/kg葛根汤灌胃,其余组则灌胃生理盐水,每日1次,持续4周。在给药后第1,7,14,21,28天对大鼠进行运动功能评价(BBB评分);在给药4周后采用苏木精-伊红染色观察脊髓组织病理形态变化,免疫荧光双染检测脊髓组织小胶质细胞极化情况,荧光定量PCR检测脊髓组织中白细胞介素6和白细胞介素1β mRNA表达,Western blot法检测脊髓组织中p-NF-κB p65、NF-κB p65、NLRP3、ASC、Cleaved Caspase-1、Bax、Bcl-2、Cleaved Caspase-3、NOX4、p-Drp1、Drp1和Mfn2蛋白表达,TUNEL法检脊髓组织细胞凋亡情况,DHE染色检测脊髓组织中活性氧水平。结果与结论:(1)与正常组、假手术组比较,模型组大鼠BBB评分降低(P <0.05),脊髓神经元皱缩畸形,呈空泡样改变;与模型组比较,葛根汤低、中、高剂量组大鼠BBB评分升高(P <0.05),且脊髓神经元损伤明显改善;(2)与正常组、假手术组比较,模型组脊髓组织中Iba-1和诱导型一氧化氮合酶蛋白表达升高(P <0.05),白细胞介素6和白细胞介素1β mRNA表达升高(P <0.05);与模型组比较,葛根汤低、中、高剂量组脊髓组织中Iba-1、诱导型一氧化氮合酶、p-NF-κB、NLRP3、ASC和cleaved Caspase-1蛋白表达以及白细胞介素6和白细胞介素1βmRNA表达降低(P <0.05);(3)与正常组、假手术组比较,模型组脊髓组织中TUNEL阳性细胞率以及Bax、Cleaved Caspase-3蛋白表达升高(P <0.05),而Bcl-2蛋白表达降低(P <0.05);与模型组比较,葛根汤低、中、高剂量组上述指标显著改善;(4)与正常组、假手术组比较,模型组大鼠脊髓组织中活性氧水平以及NOX4和p-Drp1蛋白表达升高(P <0.05),Mfn2蛋白表达降低(P <0.05);与模型组比较,葛根汤低、中、高剂量组脊髓组织中活性氧水平以及NOX4和p-Drp1蛋白表达降低(P <0.05),Mfn2蛋白表达升高(P <0.05)。结果表明,葛根汤能抑制脊髓型颈椎病模型大鼠的神经炎症反应和神经元细胞凋亡,其作用机制可能与调节NOX4/活性氧/DRP1信号通路有关。

关键词：葛根汤脊髓型颈椎病脊髓组织小胶质细胞细胞凋亡炎症 NOX4 活性氧 Drp1 工程化组织构建

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