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Unraveling the role of iron on Ni-Fe alloy nanoparticles during the electrocatalytic ethanol-to-acetate process

nano Research 2024年第4期17卷 2328-2336页

作者： junshan li Luming li Xinyu ma jun Wang jun Zhao Yu Zhang Ren He Yaoyue yang Andreu Cabot Yongfa zhu Institute for Advanced Study Chengdu University610106 ChengduChina State Key Laboratory of Environmental-Friendly Energy materials Southwest University of Science and TechnologyMianyang 621010China College of Food and Biological Engineering Chengdu UniversityChengdu 610106China School of Chemistry and Environment Southwest Minzu UniversityChengdu 610041China Hebei Key Laboratory of Photoelectric Control on Surface and Interface College of ScienceHebei University of Science and TechnologyShijiazhuang 050018China Catalonia Institute for Energy Research-IREC Sant Adriàde BesòsBarcelona 08930CataloniaSpain ICREA Pg.Lluís Companys 23Barcelona 08010CataloniaSpain Department of Chemistry Tsinghua UniversityBeijing 100084China

The anodic electrooxidation of ethanol to value-added acetate is an excellent example of replacing the oxygen evolution reaction to promote the cathodic hydrogen evolution reaction and save ***,we present a colloidal strategy to produce Ni-Fe bimetallic alloy nanoparticles(NPs)as efficient electrocatalysts for the electrooxidation of ethanol in alkaline ***-Fe alloy NPs deliver a current density of 100 ma·cm^(-2) in a 1.0 M KOH solution containing 1.0 M ethanol merely at 1.5 V *** hydrogen electrode(RHE),well above the performance of other electrocatalysts in a similar *** continuous 10 h testing at this external potential,this electrode is able to produce an average of 0.49 mmol·cm^(-2)·h^(-1) of acetate with an ethanol-to-acetate Faradaic efficiency of 80%.A series of spectroscopy techniques are used to probe the electrocatalytic process and analyze the ***,density functional theory(DFT)calculations demonstrate that the iron in the alloy NPs significantly enhances the electroconductivity and electron transfer,shifts the rate-limiting step,and lowers the energy barrier during the ethanol-to-acetate reaction pathway.

关键词： electrocatalysis ethanol oxidation reaction alloy nanoparticle acetate biorefinery

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Hubble WFC3 Spectroscopy of the Terrestrial Planets L 98–59c and d:No Evidence for a Clear Hydrogen Dominated Primary Atmosphere

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Research in Astronomy and Astrophysics 2023年第2期23卷 140-162页

作者： li Zhou Bo ma Yong-Hao Wang Yi-nan zhu School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China CSST Science Center for the Guangdong-Hong Kong-macao Greater Bay Area Sun Yat-sen UniversityZhuhai 519082China School of Science Hainan UniversityHainan 570228China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

The nearby bright M-dwarf star L 98–59 has three terrestrial-sized *** challenge remaining in characterizing atmospheres around such planets is that it is not known a priori whether they possess any *** we report on study of the atmospheres of L 98–59 c and L 98–59 d using near-infrared spectral data from the G141 grism of Hubble Space Telescope(HST)/Wide Field Camera *** can reject the hypothesis of a clear atmosphere dominated by hydrogen and helium at a confidence level of ~3σ for both *** they could have a primary hydrogen-dominated atmosphere with an opaque cloud layer,or could have lost their primary hydrogen-dominated atmosphere and re-established a secondary thin atmosphere,or have no atmosphere at *** cannot distinguish between these scenarios for the two planets using the current HST *** observations with the James Webb Space Telescope would be capable of confirming the existence of atmospheres around L 98–59 c and d and determining their compositions.

关键词： planets and satellites atmospheres-planets and satellites terrestrial planets-instrumentation spectrographs-planets and satellites individual(L 98-59 c,L 98-59 d)

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Properties of ten-year-aged argon oxygen decarburization stainless steel slag

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Journal of Iron and Steel Research International 2021年第10期28卷 1233-1242页

作者： Ya-jun Wang Ya-nan Zeng jun-guo li Yu-zhu Zhang Wei Wang College of Metallurgy and Energy North China University of Science and TechnologyTangshan063210HebeiChina School of Metallurgy Northeastern UniversityShenyang110819LiaoningChina

The characteristics of argon oxygen decarburization slag(AODS)for smelting stainless steel that has been aged for 10 years were *** types of AODSs distributed at three positions in a slag heap were sampled for comparison *** analysis,mineral phase identification,thermogravimetric analysis,and micromorphology analysis were used to study the element migration trends and carbonation behavior of AODS after long-term *** leaching tests were performed to study the chromium leachability of the aged *** results show that during the long-term aging process,the AODS heap had undergone oxidation and carbonation,accompanied by element migration and mineralogical *** surface slag had the highest degree of carbonation but the weakest chromium *** chemical composition of the middle slag was the closest to that of the original *** the bottom steel slag,in addition to magnesium,certain depositions of other elements were *** matrix phases in the aged slag were dicalcium silicate and merwinite,and the chromium was mainly wrapped in these matrix phases in the form of oxides,spinels,or *** the combined effects of carbonation and oxidation,the leaching characteristics of the chromium in the aged slag varied greatly depending on the *** bottom slag had the strongest chromium leachability,and the hexavalent chromium had long-term continuous leachability.

关键词： Argon oxygen decarburization slag Aging Chromium Leaching Mineral phase

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混合气液两相放电对水中有机物降解的机理研究

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环境科学 2007年第9期28卷 2014-2019页

作者：朱丽楠马军杨世东哈尔滨工业大学市政环境工程学院哈尔滨150090

采用混合气液两相放电的方法来处理水中的有机物.结果表明,这种新型的水处理方法对于苯酚具有较好地去除效果.随着电压的增加和空气的通入,苯酚的去除率都有所增加.对放电区域内产生的活性物种———过氧化氢和臭氧进行了定量的测定,并... 详细信息

采用混合气液两相放电的方法来处理水中的有机物.结果表明,这种新型的水处理方法对于苯酚具有较好地去除效果.随着电压的增加和空气的通入,苯酚的去除率都有所增加.对放电区域内产生的活性物种———过氧化氢和臭氧进行了定量的测定,并发现随着电压和空气的通入量的增加,这2种物质的量都有所增加.对于反应过程中的能耗进行分析得到随着电压的增加,能耗增加的幅度要大于苯酚降解率增加的幅度,能量效率增加较小.空气的通入增加了能耗,输入总能量中一部分能量使反应溶液温度升高,导致了能量的损耗.

关键词：混合气液两相放电活性氧化铝苯酚过氧化氢臭氧

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Current strategies and advances in wheat biology

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The Crop Journal 2020年第6期8卷 879-891页

作者： jun li Jing yang Yan li ligeng ma Beijing Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement College of Life SciencesCapital Normal UniversityBeijing 100048China State Key Laboratory of North China Crop Improvement and Regulation College of Life SciencesHebei Agricultural UniversityBaoding 071001HebeiChina

The characterization of agronomically important genes has great potential for the improvement of ***,progress in wheat genetics and functional genomics has been impeded by the high complexity and enormous size of the wheat *** advances in genome sequencing and sequence assembly have produced a high-quality genome sequence for ***,we suggest that the strategies used to characterize biological mechanisms in model species,including mutant preparation and characterization,gene cloning methods,and improved transgenic technology,can be applied to wheat *** strategies will accelerate progress in wheat biology and promote wheat breeding program *** also outline recent advances in wheat functional ***,we discuss the future of wheat functional genomics and the rational design-based molecular breeding of new wheat varieties to contribute to world food security.

关键词： Wheat Functional genomics Gene cloning Agronomical trait Rational design-based molecular breeding

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GPa-level pressure-induced enhanced corrosion resistance in TiZrTaNbSn biomedical high-entropy alloy

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China Foundry 2024年第3期21卷 265-275页

作者： Xiao-hong Wang Yu-lei Deng Qiao-yu li Zhi-xin Xu Teng-fei ma Xing yang Duo dong dong-dong zhu Xiao-hong yang Key Laboratory of Air-driven Equipment Technology of Zhejiang Province Quzhou UniversityQuzhou 324000ZhejiangChina School of materials Science and Engineering Taizhou UniversityTaizhou 318000ZhejiangChina

TiZrTaNb-based high-entropy alloys(HEAs)are research frontier of biomedical materials due to their high hardness,good yield strength,excellent wear resistance and corrosion ***,as an essential trace element in the human body that plays a significant role in physiological *** has stable chemical properties and a low elastic *** this study,a new material,TiZrTaNbSn HEAs,was proposed as a potential biomedical *** Ti_(35)Zr_(25)Ta_(15)Nb_(15)Sn_(10)biomedical high-entropy alloys(BHEAs)were successfully prepared through an arc melting furnace and then remelted using a German high-temperature and high-pressure apparatus under GPa-level(4 GPa and 7 GPa).The precipitation behavior of the needle-like HCP-Zr_(5)Sn_(3)phase that precipitates discontinuously at the grain boundary was successfully *** phase constitution,microstructure,and corrosion resistance of the alloy were *** results show that the needle-like HCP-Zr_(5)Sn_(3)phase is eliminated and the(Zr,Sn)-rich nano-precipitated phase is precipitated in the microstructure under high pressure,which leads to the narrowing of grain boundaries and consequently improves the corrosion resistance of the *** addition,the formation mechanisms of(Zr,Sn)-rich nanoprecipitates in BHEAs were *** Zr and Sn dissolve in the matrix due to the effect of high pressure,during the cooling process,they precipitate to form a(Zr,Sn)-rich nano-precipitated phase.

关键词： biomedical HEAs precipitation grain boundary corrosion resistance TiZrTaNbSn

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Study on catalytic mechanisms of Fe_(3)O_(4)-rGO_(x) in three typical advanced oxidation processes for tetracycline hydrochloride degradation

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Chinese Chemical Letters 2023年第1期34卷 420-425页

作者： Heshan Zheng Yunying Hou Shuo li jun ma jun nan nannan Wang College of Chemistry and Chemical Engineering Qiqihar UniversityQiqihar 161006China Urban Water Resources Development and Northern National Engineering Research Center Harbin 150090China School of Environment Harbin Institute of TechnologyHarbin 150090China Department of Environmental Engineering Beijing Institute of Petrochemical TechnologyBeijing 102617China

This study explored the catalytic mechanism and performance impacted by the materials ratio of Fe_(3)O_(4)-GO_(x) composites in three typical advanced oxidation processes(AOPs)of O_(3),peroxodisulfate(PDS)and photo-Fenton processes for tetracycline hydrochloride(TCH)*** ratio of GO in the Fe_(3)O_(4)-GO_(x) composites exhibited different trends of degradation capacity in each AOPs based on different ***_(3)O_(4)-rGO_(20wt%) exhibited the optimum catalytic performance which enhanced the ozone decomposition efficiency from 33.48%(ozone alone)to 51.83%with the major reactive oxygen species(ROS)of O_(2)·-.In PDS and photo-Fenton processes,Fe_(3)O_(4)-rGO_(5wt%) had the highest catalytic performance in PDS and H_(2)O_(2) decomposition for SO_(4)·–,and·OH generation,*** with using PDS alone,PDS decomposition rate and TCH degradation rate could be increased by 5.97 and 1.73 times under Fe_(3)O_(4)-rGO_(5wt%) *** the photo-Fenton system,Fe_(3)O_(4)-rGO_(5wt%) with the best catalyst performance in H_(2)O_(2) decomposition,and TCH degradation rate increased by 2.02 times compared with blank ***,the catalytic mechanisms in those systems of that the ROS produced by conversion between Fe^(2+)/Fe^(3+)were also analyzed.

关键词： Advanced oxidation progresses Fe_(3)O_(4) Graphene oxide Mechanism Reactive oxygen species

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Numerical simulation of aerodynamic interaction for a tilt rotor aircraft in helicopter mode

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Chinese Journal of Aeronautics 2016年第4期29卷 843-854页

作者： Ye liang Zhang Ying yang Shuo zhu Xinglin dong jun Aviation Key Laboratory of Science and Technology on Aerodynamics of High Speed and High Reynolds Number AVIC Aerodynamics Research Institute

A rotor CFD solver is developed for simulating the aerodynamic interaction phenomenon among rotor, wing and fuselage of a tilt rotor aircraft in its helicopter mode. The unsteady Navier-Stokes equations are discretized in inertial frame and embedded grid system is adopted for describing the relative motion among blades and nacelle/wing/fuselage. A combination of multi-layer embedded grid and 'extended hole fringe' technique is complemented in original grid system to tackle grid assembly difficulties arising from the narrow space among different aerodynamic components, and to improve the interpolation precision by decreasing the cell volume discrepancy among different grid blocks. An overall donor cell searching and automatic hole cutting technique is used for grid assembly, and the solution processes are speeded up by introduction of OpenMP parallel method. Based on this solver, flow fields and aerodynamics of a tilt rotor aircraft in hover are simulated with several rotor collective angles, and the corresponding states of an isolated rotor and rotor/wing/fuselage model are also computed to obtain reference solution. Aerodynamic interference influences among the rotor and wing/fuselage/nacelle are analyzed, and some meaningful conclusions are drawn. (C) 2016 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd.

关键词： Aerodynamic interaction Extended hole fringe Multi-layer embedded grid Navier-Stokes equations Tilt rotor

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Smart metasurface with self-adaptively reprogrammable functions

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light(Science & Applications) 2019年第1期8卷 266-277页

作者： Qian ma Guo dong Bai Hong Bo Jing Cheng yang lianlin li Tie jun Cui State Key Laboratory of Millimeter Wave Southeast University210096 NanjingChina Jiangsu Cyber-Space Science&Technology Co. Ltd.12 Mozhou East Road211111 NanjingChina State Key Laboratory of Advanced Optical Communication Systems and Networks Department of ElectronicsPeking University100871 BeijingChina

Intelligence at either the material or metamaterial level is a goal that researchers have been *** passive to active,metasurfaces have been developed to be programmable to dynamically and arbitrarily manipulate electromagnetic(EM)***,the programmable metasurfaces require manual control to switch among different ***,we put forth a smart metasurface that has self-adaptively reprogrammable functionalities without human *** smart metasurface is capable of sensing ambient environments by integrating an additional sensor(s)and can adaptively adjust its EM operational functionality through an unmanned sensing feedback *** an illustrative example,we experimentally develop a motion-sensitive smart metasurface integrated with a three-axis gyroscope,which can adjust self-adaptively the EM radiation beams via different rotations of the *** develop an online feedback algorithm as the control software to make the smart metasurface achieve single-beam and multibeam steering and other dynamic reactions *** proposed metasurface is extendable to other physical sensors to detect the humidity,temperature,illuminating light,and so *** strategy will open up a new avenue for future unmanned devices that are consistent with the ambient environment.

关键词： surface ambient adjust

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Oxidation performance of Fe-Al/WC composite coatings produced by high velocity arc sprayed at 800 ℃

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中国有色金属学会会刊:英文版 2004年第z1期14卷 425-428页

作者： MENG Fan-jun XU Bin-shi zhu Sheng ma shi-ning ZHANG Wei zhu Zi-xin National Key Laboratory for Remanufacturing Academy of Armored Forces Engineering Beijng 100072China

Fe-Al/WC intermetallic composite coatings were prepared by high velocity arc spraying (HVAS) technology on 20G steel and the oxidation performance of Fe-Al/WC composite coatings was studied. The results demonstrate that the kinetics curve of oxidation approximately follows the logarithmic law and the oxidation velocity of Fe-Al/WC composite coatings is less than that of 20G steel after 5 h. The composition of oxidized coating is mainly composed of Al2O3, Fe2O3, Fe3O4 and FeO. These phases distribute unevenly. The protective Al2O3 film firstly forms and preserves the coatings from further oxidation.

关键词： high temperature oxidation HVAS Fe-Al intermetallic composite coating

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