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Nanoparticle-Decorated Ultrathin La2O3 Nanosheets as an Effcient Electrocatalysis for Oxygen Evolution Reactions

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Nano-Micro Letters 2020年第4期12卷 41-52页

作者： Guangyuan yan Yizhan wang Ziyi Zhang Yutao Dong Jingyu wang Corey Carlos Pu Zhang Zhiqiang Cao yanchao Mao Xudong wang Department of Material Sciences and Engineering University of Wisconsin-MadisonMadisonWI 53706USA Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024People’s Republic of China MOE Key Laboratory of Materials Physics School of PhysicsZhengzhou UniversityZhengzhou 450001People’s Republic of China

Electrochemical catalysts for oxygen evolution reaction are a critical component for many renewable energy applications. To improve their catalytic kinetics and mass activity are essential for sustainable industrial applications. Here, we report a rare-earth metal-based oxide electrocatalyst comprised of ultrathin amorphous La2O3 nanosheets hybridized with uniform La2O3 nanoparticles(La2O3@NP-NS). Significantly improved OER performance is observed from the nanosheets with a nanometer-scale thickness. The as-synthesized 2.27-nm La2O3@NP-NS exhibits excellent catalytic kinetics with an overpotential of 310 mV at 10 m A cm^-2, a small Tafel slope of 43.1 mV dec^-1, and electrochemical impedance of 38 Ω. More importantly, due to the ultrasmall thickness, its mass activity, and turnover frequency reach as high as 6666.7 A g^-1 and 5.79 s^-1, respectively, at an overpotential of 310 mV. Such a high mass activity is more than three orders of magnitude higher than benchmark OER electrocatalysts, such as IrO2 and RuO2. This work presents a sustainable approach toward the development of highly e cient electrocatalysts with largely reduced mass loading of precious elements.

关键词： Oxygen evolution reaction Multiphase hybrid Two-dimensional nanomaterials Rare-earth oxides Ionic layer epitaxy

Research progresses of cathodic hydrogen evolution in advanced lead–acid batteries

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Science Bulletin 2016年第6期61卷 451-458页

作者： Feng wang Chen Hu Min Zhou Kangli wang Jiali Lian Jie yan shijie Cheng Kai Jiang State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074 China China Electric Power Research Institute Beijing 100192 China

Integrating high content carbon into the negative electrodes of advanced lead–acid batteries effectively eliminates the sulfation and improves the cycle life,but brings the problem of hydrogen evolution,which increases inner pressure and accelerates the water *** this review,the mechanism of hydrogen evolution reaction in advanced lead–acid batteries,including lead–carbon battery and ultrabattery,is briefly *** strategies on suppression hydrogen evolution via structure modifications of carbon materials and adding hydrogen evolution inhibitors are summarized as *** review points out effective ways to inhibit hydrogen evolution and prolong the cycling life of advanced lead–acid battery,especially in high-rate partial-state-of-charge applications.

关键词： Lead–carbon battery Ultrabattery Hydrogen evolution reaction Hydrogen inhibition

Heavy metal complex containing organic/polymer materials for bulk-heterojunction photovoltaic devices

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Chinese Chemical Letters 2016年第8期27卷 1250-1258,1467页

作者： Ya-Nan Liu shi-Fan wang You-Tian Tao Wei Huang Key Laboratory of Flexible Electronics & Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech University

The application of heavy-metal complexes in bulk-heterojunction（BHJ） solar cells is a promising new research field which has attracted increasing attention,due to their strong spin-orbit coupling for efficient singlet to triplet intersystem *** review article focuses on recent advances of heavy metal complex containing organic and polymer materials as photovoltaic donors in BHJ solar ***-acetylide containing oligomersor and polymers have been firstly illustrated due to the good solubility,square planar structure,as well as the fairly strong Pt-Pt *** the cyclometalated Pt or Ir complex containing conjugated oligomers and polymers are presented in which the triplet organometallic compounds are embedded into the organic/polymer backbone either through cyclometalated main ligand or the auxiliary *** triplet small molecular cyclometalated Ir complex are also briefly *** the chemical modification,physical doping of cyclometalated heavy metal complexes as additives into the photovoltaic active layers is finally demonstrated.

关键词： Platinum complex Iridium complex Bulk-heterojunction Photovoltaic devices Organic/polymer solar cells Triplet

A new glucosyltransferase UGT78 from Iris sanguinea is a putative negative regulator in cadmium stress response

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Journal of Forestry Research 2024年第6期35卷 344-355页

作者： Gongfa shi Guiling Liu Huijun Liu Lei wang Aerdake Kuwantai Yu Du Ling wang Xiaolei Xi Rusong Chai College of Landscape Architecture Northeast Forestry UniversityHarbin 150040People’s Republic of China Taiyuan Botanical Garden Taiyuan 030025People’s Republic of China Heilongjiang Forest Botanical Garden Harbin 150040People’s Republic of China

Urbanization has resulted in a significant degra-dation of soil quality,subjecting plants to persistent abiotic stressors such as heavy metal pollution,salinization,and ***-glycosyltransferases(UGTs)participate in protein glycosylation,secondary metabolite synthesis,and detoxification of exogenous toxic *** sanguinea Donn ex Hornem exhibits a high degree of resistance to various abiotic *** enhance the plant’s response to adversity,a novel glycosyltransferase belonging to the UGT78 family,encoding flavonoid 3-O-glucosyltransferase(UF3GT),was cloned from the monocot species *** with the control group,overexpression of IsUGT78 enhanced sensitivity to cadmium stress,while showing no significant impact under NaCl and d-sorbitol *** cadmium treatment,arabidopsis exoge-nously transformed with the IsUGT78 gene possessed lower germination,fresh weight,root length,and chlorophyll con-tent and increased malondialdehyde content than the wild type *** addition,metabolomics in leaves led to the identification of 299 flavonoid metabolites,eight and 127 which were significantly up-and down-regulated,respec-tively,in the transgenic *** note,all eight upregulated flavonoid compounds were *** that arabi-dopsis,which exogenously expresses the IsUGT78 gene,has reduced resistance to cadmium,IsUGT78 may lead to a reduced ability to cope with cadmium stress.

关键词： Iris sanguinea IsUGT78 Stress resistance Cadmium Glucosyltransferase

Effects of natural forest conversion and plantation tree species composition on soil macrofauna communities in Northeast China mountains

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Journal of Forestry Research 2023年第5期34卷 1475-1489页

作者： Shuangjiao Ma Qingcheng wang Yong Zhang Limei yan Donghai Cui Liqing Xu Key Laboratory for Sustainable Forest Ecosystem Management−Ministry of Education School of ForestryNortheast Forestry UniversityHarbin 150040People’s Republic of China

As primary and secondary forests are being replaced by plantations across the globe,the soil macrofauna community structure is also affected,but little is known about the impact of mixed culture plantations compared with monocultures on the soil *** determine the impact of forest conversion on soil macrofauna,we surveyed the soil macrofauna in two broad-leaved and three coniferous monoculture stands and four coniferous-broadleaved mixed stands,and in adjacent reserved secondary stands as a *** macro fauna community composition was significant affected by forest type,season and their interaction(P<0.05).The abundance,taxa richness and diversity of soil macro fauna changed to different degrees depending on the plantation *** monoculture stands and secondary stands had similar macrofauna abundance and taxa richness,but values were lower in coniferous stands than in secondary *** Shannon index for macrofauna in coniferous stands was also the lowest,but the Pielou index did not differ between forest *** negative effects of the conifer monoculture on soil macro fauna were not present in the mixed stands with broad-leaved *** conversion impacted soil properties;soil moisture,NO_(3)^(-),and pH were significant drivers of soil macrofauna community *** impact of forest conversion on soil macrofauna was closely dependent on tree species composition and *** macro fauna community structure in the broadleaved and the mixed stands were relatively similar to that in the natural forest,and thus recommended for forest conversion in the study area.

关键词： Forest conversion Plantation forest Tree species composition Soil macrofauna Diversity Functional group

Solitonic Information Transmission in General Relativity

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Communications in Theoretical Physics 2007年第4期47卷 663-664页

作者： SHANG Yu wang Gui-Dong WU Xiao-Ning wang shi-Kun LAU Yun-Kau Institute of Applied Mathematics Academy of Mathematics and System Sciences the Chinese Academy of Sciences Beijing 100080 China School of Mathematics and Information Science Shandong University of Technology Zibo 255049 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China

An exact solution of the vacuum Einstein＇s field equations is presented, in which there exists a congruence of null geodesics whose shear behaves like a travelling wave of the KdV equation. On the basis of this exact solution, the feasibility of solitonic information transmission by exploiting the nonlinearity intrinsic to the Einstein field equations is discussed.

关键词： Newman-Penrose tetrad KdV wave solitonic information transformation

Synthesis of 8-(ω-Chloroalkyl)-dipyrrinones

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Chemical Research in Chinese Universities 2000年第3期16卷 266-270页

作者： TU Bin ZHANG Yi wang Chang qi MA Jin shi Center for Molecular Science Institute of ChemistryChinese Academy of SciencesBeijing 100080P.R.China Institute of Photographic Chemistry Chinese Academy of SciencesBeijing 100101P.R.China

Dipyrrinones, typically bright yellow compounds with a long axis-polarized π-π* excitation in the 14π-electron-conjugated chromophore, such as xanthobilirubic acid methyl ester (XBRMe), are useful building blocks for the synthesis of biologically important tetrapyrrole pigments such as bilirubin. They have been extensively used as model dipyrrole pigments for the spectroscopic and the photochemical studies of linear tetrapyrroles. They have also served as useful adjuncts in the studies of jaundies phototherapy and in bilirubin structure-biological function relationships. The synthesis and results of 8-(ω-chloroalkyl)-dipyrrinones were discussed.

关键词： Friedel Crafts acylation Reduction Dipyrrinone

Microstructure, Interface, and Properties of Multilayered CrN/Cr_2O_3 Coatings Prepared by Arc Ion Plating

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Journal of Materials Science & Technology 2014年第12期30卷 1193-1201页

作者： Chang-Ming shi Tie-Gang wang Zhi-Liang Pei Jun Gong Chao Sun State Key Laboratory for Corrosion and Protection (SKLCP) Institute of Metal Research Chinese Academy of Sciences

There has been much interest in developing multilayered or nanolayered physical vapor deposition（PVD） coatings identified as a group of promising protective coatings for their excellent mechanical properties and corrosion resistance. In this study, the multilayered Cr N/Cr2O3 coatings with different bilayer periods（L） were synthesized on the polished high speed steel substrates from a Cr target with the alternative atmosphere of pure nitrogen and pure oxygen by arc ion plating（AIP） technique. The results revealed that the microstructure,morphologies and properties of the multilayered coatings were strongly influenced by the bilayer period（L）.There were two kinds of interfaces in the multilayered Cr N/Cr2O3coatings： the sharp ones and the blurry ones. With reducing the value of L, the macro-particles densities decreased gradually, whereas the coating microhardness, adhesive strength and wear resistance first increased, and then decreased slightly or remained stable as the bilayer period L 〈 590 nm. The multilayered Cr N/Cr2O3 coating with the bilayer period L of 590 nm possessed the best comprehensive properties, namely the highest microhardness, the strongest adhesion, and the lowest wear rate.

关键词： Cr2O3/CrN Multilayered coating Arc ion plating Interface Mechanical properties Wear

Research on adaptive anti-rollover control of kiloton bridge transporting and laying vehicles

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High Technology Letters 2017年第2期23卷 203-211页

作者：郭锐 shi Yu wang Chao Tian Yaya Zhao Jingyi Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science ( Yanshan University) College of Mechanical Engineering Yanshan University Qinhuangdao 066004 P. R. China Lianyungang Tianming Equipment Co. Ltd Lianyungang 222000 P. R. China

The SPMT construction method is a new rapid construction technology of large urban overpass with unblocked traffic,and unstability of SPMT construction method equipment cannot be accurately described due to the concrete beam size,irregular shape and complex transport conditions,which is called kiloton bridge transporting and laying *** anti-rollover performance of SPMT suspension system is studied,and vehicle side slip angle and load transfer rate(LTR) are regarded as the evaluation *** active suspension adaptive anti-rollover control model of SPMT,in which roll stability affected by the structural parameters and control parameters,is built based on fuzzy PID,and the effectiveness of the control method is verified through real vehicle test.

关键词： kiloton bridge transporting and laying vehicle SPMT construction method active suspension adaptive anti-rollover control