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| 1 | Self-supported high-entropy alloy electrocatalyst for highly efficient H_(2) evolution in acid condition显示文摘Developing non-precious catalysts as Pt substitutes for electrochemical hydrogen evolution reaction(HER)with superior stability in acidic electrolyte is of critical importance for large-scale,low-cost hydrogen production from water.Herein,we report a CoCrFeNiAl high-entropy alloy(HEA)electrocatalyst with self-supported structure synthesized by mechanical alloying and spark plasma sintering(SPS)consolidation.The HEA after HF treatment and in situ electrochemical activation for 4000 cycles of cyclic voltammetry(HF-HEAa2)presents favourable activity with overpotential of 73 mV to reach a current density of 10 mA cm^(2) and a Tafel slope of 39.7 mV dec1.The alloy effect of Al/Cr with Co/Fe/Ni at atomic level,high-temperature crystallization,as well as consolidation by SPS endow CoCrFeNiAl HEA with high stability in 0.5 M H2SO4 solution.The superior performance of HF-HEAa2 is related with the presence of metal hydroxides/oxides groups on HEA. | Peiyan Ma Mingming Zhao Long Zhang Heng Wang Junfeng Gu Yuchen Sun Wei Ji Zhengyi Fu | 2020 | Journal of Materiomics2020，6，4： | 8 |
| 2 | Molecular Dynamics Simulation on Mobility and Aggregation of Macromolecular Lubricant Oxidation Products and Their Influences on Base Stock显示文摘The mobility and aggregation behavior of macromolecular lubricant oxidation products and their influences on the performance of base stock were probed by molecular dynamics(MD)simulation.The mean square displacement(MSD)of molecules was calculated to explore the mobility of molecules.The distribution appearance of lubricant oxidation products in models was acquired to explore the aggregation of molecules.The results show that the mobility of macromolecular oxidation products is lower than that of base stock.The MSD of macromolecular oxidation products reduces with an increasing macromolecular weight.Macromolecular oxidation products can also decrease the mobility of base stock.The interaction energy between the macromolecules and the base stock soars with the increase of macromolecular weight.Macromolecules with a larger molecular weight can affect more base stock molecules with stronger restriction,which leads to lower mobility of base stock molecules.There are aggregates formed among macromolecular oxidation products,and the molecules in aggregates are connected by hydrogen bonds.The quantity of hydrogen bonds in aggregates is related to temperature. | Xia Lei Li Yan Zhang Hongmei Jiang Zhengyi Long Jun | 2020 | China Petroleum Processing & Petrochemical Technology2020，22，3： | 1 |
| 3 | Synthesis, characterization and luminescence properties of Y-doped and Tb-doped ZnO nanocrystals显示文摘 | Tiekun Jia Weimin Wang Fei Long Zhengyi Fu Hao Wang Qingjie Zhang | 2009 | Materials Science & Engineering B2009，，3： | 1 |
| 4 | Microst- ructural evolution and mechanical behaviors of graded cemented carbides显示文摘 | Liu Yong Wang Haibing Long Zhengyi | 2006 | Materials Science and Engineering A2006，426，： | 1 |
| 5 | High frequency AC electric glow discharge visualization technology and application in big diameter hypersonic low-density wind tunnel显示文摘In order to visualize the rarefied flow field in aΦ1m hypersonic low-density wind tunnel,an electric glow discharge technique based on high frequency excited power has been developed.Firstly,finite element simulation analysis has been carried out,and it is concluded that the breakdown voltage can be reduced by using high frequency power supply;then an electric glow discharge apparatus has been fabricated,and the discharge images were compared with simulations;besides,a clear flow field around HB-1 standard model has been observed using this technology;finally,the influence of glow discharge on the flow field,as well as the differences between direct current and high frequency electric glow discharges is discussed at the end of this paper. | Wanqiu Jiang Huacheng Qiu Yanguang Yang Yilei Shi Jie Wang Jie Li Zhengyi Long Chunman Mao | 2021 | Advances in Aerodynamics2021，3，1： | 1 |
| 6 | Synthesis, characterization and luminescence properties of Y-doped and Tb-doped ZnO nanocrystals 显示文摘 | Jia Tiekun Wang Weimin Long Fei Fu Zhengyi Wang Hao Zhang Qingjie | 2009 | Materials Science and Engineering B2009，162，： | 1 |
| 7 | Microstructural evolution and mechanical behaviors of graded cemented carbides显示文摘 | Liu Yong Wang Haibing Long Zhengyi | 2006 | Materials Science and Engineering:A2006，426，12： | 1 |
| 8 | The Myocardial Protection of HTK Cardioplegic Solution on the Long-Term Ischemic Period In Pediatric Heart Surgery显示文摘 | Jinping Liu Zhengyi Feng Ju Zhao Bo Li Cun Long | 2008 | ASAIO Journal2008，，5： | 1 |
| 9 | Formation mechanism of cobalt-gradient structure in WC-Co hard alloy显示文摘 | Yong Liu Haibing Wang Jiangao Yang Baiyun Huang Zhengyi Long | 2004 | Journal of Materials Science2004，，13： | 1 |
| 10 | Microstructuralevolutionand mechanical behaviors of graded cemented carbides显示文摘 | Yong Liu Haibing Wang Zhengyi Long | 2006 | Material Science and Engineering A2006，426，12： | 1 |
| 11 | Can the scaling of plant nitrogen to phosphorus be altered by global change? An empirical test显示文摘全球变化可能引起土壤中各种养分的供应失衡,进而导致陆地植物中氮(N)和磷(P)元素化学计量学的不平衡。前人的研究报道了全球变化因子对植物N、P含量和N:P的影响,但鲜有研究探讨全球变化因子是否影响以及如何影响这两种元素之间的异速关系。本研究利用改变降水(增雨和干旱)、增温和N添加处理的野外控制试验,结合异速函数N=βPα(或对数转换后的线性关系:Log N=Logβ+αLog P),检验了中国西北地区黄土高原半干旱草原植物N和P化学计量特征及N和P之间的异速关系对这些全球变化因子的响应。研究结果表明,干旱和增温均降低了植物P浓度,N添加增加了植物N浓度,这些都导致植物N:P增加。干旱、增温和N添加没有显著改变植物N和P浓度之间异速关系的斜率(即N和P浓度对数转换后的线性关系斜率α),但是显著增加了其截距(Logβ)。这些结果表明,全球变化因子可能不会影响植物N和P之间的协同变化关系,植物中N和P之间可能存在着紧密的耦合关系。这些结果将有助于我们更好地理解全球变化背景下的植物养分动态和元素平衡。 | Min Long Juanjuan Zhang Zhengyi Liu Luyao Zhou Fanglong Su Rui Xiao Yi Wang Hui Guo Shuijin Hu | 2020 | Journal of Plant Ecology2020，13，4： | 0 |
| 12 | Molecular Simulation of Chain Initiation Mechanism in Oxidation of Lubricant Base Stock显示文摘Chain initiation reactions in the oxidation process of lubricant base stock molecules were studied by molecular simulations.Two ways to initiate lubricant oxidation were investigated.They included the dissociation of chemical bonds in base stock molecules and the reaction between base stock molecules and oxygen(O_(2)),respectively.Reaction activation energy of above methods was calculated.The results show that C‒C bonds are more likely to break than C‒H bonds to generate free radicals by the pyrolysis of chemical bonds.The C‒C bonds with tertiary carbon atoms are preferential positions to crack.However,their bond dissociation energy is above 360 kJ/mol,which is difficult to occur under lubricant working conditions.The chain initiation is more likely to occur by the way that O_(2) attacks the two atoms in C‒H bonds at the same time,and is then embedded into the C‒H bond to produce hydrocarbon peroxides.And then,the O‒O bond is cracked to form hydroxyl radicals and alkoxy radicals.The C‒H bonds with tertiary carbon atoms are preferential reaction sites,the reaction activation energy of which is about 190.11 kJ/mol. | Xia Lei Li Yan Zhang Hongmei Jiang Zhengyi Long Jun | 2021 | China Petroleum Processing & Petrochemical Technology2021，23，4： | 0 |
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