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Recent advances in synthesis strategies and solar-to-hydrogen evolution of 1T phase MS_(2.(M=W,Mo)co-catalysts

Journal of materials science & Technology 2022年第6期101卷 242-263页

作者： Shuo li Jinyan Xiong Xueteng zhu Weijie li Rong Chen Gang cheng school of Chemistry and Environmental Engineering Wuhan Institute of TechnologyDonghu New&High Technology Development ZoneWuhan 430205China College of Chemistry and Chemical Engineering Hubei Key Laboratory of Biomass Fibers and Ecodyeing&FinishingWuhan Textile UniversityWuhan 430200China school of materials {2. and Hydrogen Energy Foshan UniversityFoshan 528000China Institute for Superconducting and Electronic materials Innovation CampusSquires WayUniversity of WollongongNorth WollongongNSW 2500Australia Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450002China

Photocatalytic water splitting is a promising strategy to produce hydrogen as a sustainable and clean energy carrier,based on abundant solar energy and semiconductor photocatalysts,and it has received extensive research and discussion over the past several *** is challenging,however,to achieve an efficient solar-to-hydrogen evolution process with a single particulate photocatalyst due to the weak solar spectrum harvest and the rapid recombination of photogenerated electron-hole pairs during the photocatalysis *** semiconductors to create different co-catalysts presents a viable solution to the above ***,semiconductor photocatalysts modified by different transition metal sulfidebased co-catalysts with designed functions,especially in light absorption enhancement and chargecarrier-separation efficiency promotion,have attracted much *** continued breakthroughs have been made in the preparation,modification,and solar-to-hydrogen evolution application of the 1T phase MS_(2.(M=W,Mo)co-catalyst-based photocatalysis system in recent years,we believe that a comprehensive review of this kind of co-catalyst would further promote its research and development to address the energy and environmental challenges that we are currently ***,recent studies and progress are summarized on the fabrication of 1T phase MS_(2.(M=W,Mo)-based co-catalyst materials,as well as their roles and functional mechanisms for photocatalytic H;***,concluding perspectives on the opportunities in and challenges for the further exploration of the 1T-MS_(2.(M=W,Mo)-based solar-tohydrogen evolution system are presented.

关键词： Solar-to-hydrogen evolution Co-catalysts 1T-MS_(2.(M=W Mo) Water splitting Synthesis strategies Photocatalysis

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Hot-top direct chill casting assisted by a twin-cooling field:Improving the ingot quality of a large-size 2.2. Al alloy

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Journal of materials science & Technology 2022年第17期112卷 114-122页

作者： cheng zhu Zhihao Zhao Qingfeng zhu Gaosong Wang Yubo Zuo Qiangqiang li Gaowu Qin Research Center for Metallic Wires School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China Key Laboratory of Electromagnetic Processing of materials Ministry of EducationNortheastern UniversityShenyang 110819China Key Laboratory of Anisotropy and Texture of materials Ministry of EducationNortheastern UniversityShenyang 110819China

Microstructure inhomogeneity and negative segregation have long been challenges for large-size alloy ingots,directly affecting the downstream processing and final performance of ***,we used2.2. aluminum alloy as a model alloy to propose a technique,named double-cooling field casting,i.e.,one 2.2. Al alloy rod(Φ2. mm)at room temperature was introduced into the melt along the central axis of the hot-top with the protection of a thermal-insulation tube during the direct chill(DC)casting process of aΦ300 mm 2.2. Al alloy *** results show that the introduction of the same alloy solid insert has a remarkable influence on refining grains in the center region of the ingot,reducing negative centerline segregation and decreasing the depth of the center part of the *** the application of the 2.2. Al insert,the mean size of equiaxed grains at the center part of the ingot decreased from12.4±132.m to 72.±69μ*** relative deviation of the Cu and Mg main solutes reduced from-0.062.and-0.054 to-0.03 and-0.02.,respectively,and the sump depth decreased from 2.0 mm to2.2.***,the shape of the solidification front was changed from‘V’-shaped to‘W’-*** ingot quality was thus improved,mainly arising from the dissolution of the cold 2.2. Al insert at a proper position of the hot-top counteracting some latent heat of solidification of the ingot,dissipating the heat of the central part of the hot-top by conducting the 2.2. Al insert to the outside,and providing extra-nuclei from the unmoltenα-Al particles of the insert.

关键词： Aluminum alloy DC casting Solid insert Grain refinement Macrosegregation

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Woody plant cell walls:Fundamentals and utilization

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Molecular Plant 2024年第1期17卷 112-140页

作者： Wei li Ying-Chung Jimmy lin Ying-Lan Chen {2.uang Zhou Shuang li Nette De Ridder Dyoni M.Oliveira Lanjun Zhange Baocai Zhang Jack P.Wang Changzheng Xu Xiaokang Fu Keming Luo Ai-Min Wu Taku Demura Meng-zhu Lu Yihua Zhou Laigeng li Toshiaki Umezawa Wout Boerjan Vincent L.Chiang State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040China Department of life science National Taiwan UniversityTaipeiTaiwanChina Department of Biotechnology and Bioindustry sciences College of Bioscience and BiotechnologyNational Cheng Kung UniversityTainanTaiwanChina Department of Plant Biotechnology and Bioinformatics Ghent UniversityTechnologiepark 719052 GhentBelgium VIB Center for Plant Systems Biology Technologiepark 719052 GhentBelgium State Key Laboratory of Plant Genomics Insttute of Genetics and Developmental Biology Chinese Academy of SciencesBeijing 100101China university of Chinese Academy of sciences Beijing 100049China Forest Biotechnology Group Department of Forestry and Environmental ResourcesNorth Carolina State UniversityRaleighNC 27695USA Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation Integrative Science Center of Germplasm CreationSchool of Life SciencesSouthwest UniversityChongqing 400715China Guangdong Key Laboratory for Innovative Developmentand Utilization of Forest Plant Germplasm College of Forestry and Landscape ArchitecturesSouth China Agricultural UniversityGuangzhou510642China Center for Digital Green-innovation Nara Institute of Science and TechnologykomaNara 630-0192Japan State Key Laboratory of Subtropical Siviculture College of Forestry and BiotechnologyZhejang A&F UniversityHangzhou 311300China CAS Center for Excellence in Molecular Plant sciences Chinese Academy of Sciences300 Fenglin RoadShanghai 200032China Laboratoryof MetabolicscienceofForest Plants and Microorganisms Rsearch Institute for Sustainable HumanosphereKyoto UniversityUjiKyoto 611-0011 Japan

Cell walls in plants,particularly forest trees,are the major carbon sink of the terrestrial *** and biosynthetic features of plant cell walls were revealed early on,focusing mostly on herbaceous model *** developments in genomics,transcriptomics,epigenomics,transgenesis,and associated analytical techniques are enabling novel insights into formation of woody cell ***,we review multilevel regulation of cell wall biosynthesis in forest tree *** highlight current approaches to engineering cell walls as potential feedstock for {2. and energy and survey reported field tests of such engineered transgenic *** outline opportunities and challenges in future research to better understand cell type biogenesis for more efficient wood cell wall modification and utilization for bio{2. or for enhanced carbon capture and storage.

关键词： regulation of cell wall formation biosynthesis of cell wall components lignin cellulose hemicellulose cell wall utilization

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Mg-8Zn-4Al-0.5Cu-0.5Mn-xli高模量铸造镁合金的组织和性能

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材料研究学报 2024年第3期38卷 187-196页

作者：刘晨野罗天骄李应举冯小辉黄秋燕郑策朱成杨院生中国科学院金属研究所沈阳110016 中国科学技术大学材料科学与工程学院沈阳110016

设计和制备Mg-8Zn-4Al-0.5Cu-0.5Mn-x li(x=0,3,5,7)(%,质量分数)系列高比模量的镁合金,研究了它的组织和性能。li含量为3.14%和5.37%的两种镁合金,其基体为单相α-Mg,在晶界析出骨骼状Mg_(32.(Al,Zn)49相,在晶粒内有颗粒状Mg_(5)Al_(2.Zn_(2.相和Al_(2.Mn相;li含量为7.57%的合金,其基体主要为双相组织α-Mg+β-li。添加li元素后在晶界附近生成的共晶组织由α-Mg相和层片状Alli相组成,并随着li含量的提高层片状Alli相的含量随之提高。随着li含量的提高,合金的屈服强度呈逐渐提高的趋势,而抗拉强度基本上不变,合金的弹性模量呈现先提高后降低的趋势。铸态合金ZA84-5li的弹性模量可达51.89 GPa,比纯Mg的弹性模量高7 GPa,但是其力学性能基本不变,屈服强度为141 MPa,抗拉强度为189 MPa,密度为1.71 g/cm^(3)。

关键词：金属材料镁合金第二相强化显微组织弹性模量

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Effect of surface modification on the radiation stability of diamond ohmic contacts

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Chinese Physics B 2024年第2期33卷 444-448页

作者：牟恋希赵上熳王鹏原晓芦刘金龙朱志甫陈良贤魏俊俊欧阳晓平李成明 Institute for Advanced materials and Technology University of Science and Technology BeijingBeijing 100083China school of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China school of Information Engineering Zhengzhou University of TechnologyZhengzhou 450044China State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear TechnologyXi’an 710024China

The ohmic contact interface between diamond and metal is essential for the application of diamond *** modification can significantly affect the contact performance and eliminate the interface polarization ***,the radiation stability of a diamond detector is also sensitive to surface *** this work,the influence of surface modification technology on a diamond ohmic contact under high-energy radiation was *** radiation,the specific contact resistivities(ρc)between Ti/Pt/Au-hydrogen-terminated diamond(H-diamond)and Ti/Pt/Au-oxygenterminated diamond(O-diamond)were 2.0×10^(-4)W·cm^(2. and 4.3×10^(-3)Wcm^(2.,*** 10 MeV electron radiation,the ρc of Ti/Pt/Au H-diamond and Ti/Pt/Au O-diamond were 5.3×10^(-3)W·cm^(2.and 9.1×10^(-3)W·cm^(2.,*** rates of change of ρc of H-diamond and O-diamond after radiation were 2.50%and 112.,*** electron radiation promotes bond reconstruction of the diamond surface,resulting in an increase in ρc.

关键词： single crystal diamond ohmic contact surface modification electron radiation

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Scalable solid-phase synthesis of defect-rich graphene for oxygen reduction electrocatalysis

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Green Energy & Environment 2023年第1期8卷 224-232页

作者： Chunxiao Dong li Yang cheng lian Xiaoling Yang Yihua zhu Hongliang Jiang Chunzhong li Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China Key Laboratory for Ultrafine materials of Ministry of Education School of Chemical EngineeringEast China University of Science and TechnologyShanghai200237China Institutes of Physical science and Information Technology Anhui UniversityHefeiAnhui230601China school of Chemistry and Molecular Engineering East China University of Science and TechnologyShanghai200237China

Defect-engineered carbon materials have been emerged as promising electrocatalysts for oxygen reduction reaction(ORR)in metal-air *** a facile strategy for the preparation of highly active nanocarbon electrocatalysts remains ***,a low-cost and simple route is developed to synthesize defective graphene by pyrolyzing the mixture of glucose and carbon *** dynamics simulations reveal that the graphene formation is ascribed to two-dimensional layered feature of carbon nitride,and high compatibility of carbon nitride/glucose *** measurements suggest that the graphene possesses rich edge and topological *** graphene catalyst exhibits higher power density than commercial Pt/C catalyst in a primary Zn-air *** experimental results and theoretical thermodynamic analysis,it is identified that graphitic nitrogen-modified topological defects at carbon framework edges are responsible for the decent ORR *** strategy presented in this work can be can be scaled up readily to fabricate defective carbon materials.

关键词： Carbon materials Electrocatalysis Oxygen reduction reaction Solid-phase synthesis Zn-air battery

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单原子在铝合金中的扩散迁移行为:可解释机器学习加速第一原理计算方法

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science china {2. 2024年第4期67卷 1140-1149页

作者：黄敬涛薛景腾李明伟程源来忠红胡津周飞曲囡刘勇朱景川 school of materials {2. and Engineering Harbin Institute of TechnologyHarbin 150001China National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of TechnologyHarbin 150001China National Key Laboratory of science and Technology on Advanced Composites in SpecialEnvironments Harbin Institute of TechnologyHarbin 150001 China Center for Analysis Measurement and ComputingHarbin Institute of TechnologyHarbin 150001China State Key Laboratory for Environment-friendly Energy materials School of Materials Science and EngineringSouthwest University of Science and TechnologyMianyang 621010China

本文采用机器学习加速第一原理计算的方法,研究了铝基体中单原子的扩散迁移行为.建立铝基体中三十多种单原子扩散迁移行为的小样本数据集,以原子半径、离子半径和第一电离能等固有参数作为输入特征值,合金原子与空位之间的相互作用能以... 详细信息

本文采用机器学习加速第一原理计算的方法,研究了铝基体中单原子的扩散迁移行为.建立铝基体中三十多种单原子扩散迁移行为的小样本数据集,以原子半径、离子半径和第一电离能等固有参数作为输入特征值,合金原子与空位之间的相互作用能以及合金原子在铝基体中的扩散势垒作为输出参数.通过相关性分析初步确定描述符与预测目标之间的关系,并利用递归特征消除法确定不同目标的输入特征和描述符数量.通过交叉验证证明所选模型的先进性,并进行微调以优化其性能.为了验证其效率和准确性,CatBoost模型经过了传统算法的严格测试.利用训练有素的模型预测周期表中其他单原子在铝基体中的扩散迁移行为.机器学习加速第一原理计算的结果可为进一步开发新型铝合金提供理论依据.

关键词：机器学习扩散迁移交叉验证输出参数单原子第一原理计算原子半径小样本数据

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Single-atom Cu anchored on N-doped graphene/carbon nitride heterojunction for enhanced photocatalytic H_(2.O_(2. production

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Journal of materials science & Technology 2023年第30期161卷 192-200页

作者： Han li Bicheng {2. Bei cheng Guoqiang Luo Jingsan Xu Shaowen Cao State Key Laboratory of Advanced Technology for materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430078China school of Chemistry and Physics Queensland University of TechnologyBrisbaneQLD 4000Australia

Photocatalytic production of H_(2.O_(2. by polymeric carbon nitride has been regarded as a promising ap-proach for the conversion of solar energy into valuable ***,the efficiency of pristine car-bon nitride is limited by the rapid charge recombination and the lack of suitable active ***,we introduce single-atom Cu anchored on N-doped graphene(Cu-NG)as a cocatalyst coupled with carbon nitride via covalent bonding to enhance photocatalytic H_(2.O_(2. *** Cu-NG/carbon nitride could broaden the light absorption from UV to near-infrared region,contributing to the photocatalytic ***,NG containing electron-rich N atoms could serve as anchoring sites for stabilizing single-atom ***,the single-atom Cu acts not only as an electron sink to steer the interfacial charge sep-aration but also as an active site for molecular oxygen adsorption and *** the synergistic effect of the enhanced interfacial charge separation and suitable active sites,Cu-NG/carbon nitride ex-hibits improved photocatalytic performance with an H_(2.O_(2. generation rate of 2.56μmol g^(−1)h^(−1),which is 2.6 times that of pristine carbon *** work provides a protocol for high-performance photocat-alytic H_(2.O_(2. production using a single-atom cocatalyst.

关键词： Single-atom catalysis Interfacial charge separation Photocatalytic H_(2.O_(2.production

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Effect of Ni on the corrosion resistance of bridge steel in a simulated hot and humid coastal-industrial atmosphere

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International Journal of Minerals,Metallurgy and materials 2018年第3期25卷 325-338页

作者： Dong-liang li Gui-qin Fu Miao-yong {2. Qing li cheng-xiang Yin school of Metallurgy Northeastern University

The corrosion resistance of weathering bridge steels containing conventional contents of Ni(0.2. wt%, 0.42.wt%, 1.50 wt%) and a higher content of Ni(3.55 wt%) in a simulated hot and humid coastal-industrial atmosphere was investigated by corrosion depth loss, scanning electron microscopy–energy-dispersive X-ray spectroscopy, Raman spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and electrochemical methods. The results showed that, with increasing Ni content, the mechanical properties of the bridge steel were markedly improved, the welding parameters were satisfactory at room temperature, and the corrosion resistance was enhanced. When the Ni content was low(≤0.42.wt%), the crystallization process of the corrosion products was substantially promoted, enhancing the stability of the rust layer. When the Ni content was higher(~3.55 wt%), the corrosion reaction of the steel quickly reached a balance, because the initial rapid corrosion induced the formation of a protective rust layer in the early stage. Simultaneously, NiO and NiFe_2._4 were generated in large quantities; they not only formed a stable, compact, and continuous oxide protective layer, but also strongly inhibited the transformation process of the corrosion products. This inhibition reduced the structural changes in the rust layer, thereby enhancing the protection. However, when the Ni content ranged from 0.42.wt% to 1.50 wt%, the corrosion resistance of the bridge steel increased only slightly.

关键词： bridge steel atmospheric corrosion corrosion resistance nickel rust anti-corrosion mechanism

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退火温度对轧制Mo-Re合金管材显微组织及力学性能的影响

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金属热处理 2024年第6期49卷 123-129页

作者：陈成朱琦席莎曾学良张学苏金堆城钼业股份有限公司技术中心陕西西安710077 西安交通大学材料科学与工程学院陕西西安710049

针对薄壁钼管加工中由于大塑性变形而固有的严重各向异性问题,采用不同退火温度(900、1050、12.0℃)来调控Mo-Re合金薄壁管的微观组织和力学性能。结果表明,Mo-Re合金棒料中存在大量//TD的织构,呈现出明显的各向异性。锻造后经过1050℃... 详细信息

针对薄壁钼管加工中由于大塑性变形而固有的严重各向异性问题,采用不同退火温度(900、1050、12.0℃)来调控Mo-Re合金薄壁管的微观组织和力学性能。结果表明,Mo-Re合金棒料中存在大量//TD的织构,呈现出明显的各向异性。锻造后经过1050℃×1 h退火的Mo-Re合金坯料,可以有效实现薄壁钼管在各向异性和强韧性方面的同步改善,其室温拉伸强度达到838 MPa,1300℃高温拉伸强度达到198 MPa,且平均硬度为2.0.5 HV0.3。经过1050℃×1 h退火制备的Mo-Re合金薄壁管具有优良的强韧性,这主要与退火处理后Mo-Re合金棒料的晶粒尺寸分布有关。1050℃退火后Mo-Re合金棒料的平均晶粒尺寸为2..1μm,较12.0℃退火后Mo-Re合金棒料的更小,具有更高的强塑性;其晶粒尺寸集中度较900℃退火后Mo-Re合金棒料的更高,塑性变形过程中的变形协调性更好。

关键词： Mo-Re合金退火温度显微组织力学性能

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