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The proximity between hydroxyl and single atom determines the catalytic reactivity of Rh1/CeO_(2) single-atom catalysts

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Nano Research 2024年第1期17卷 397-406页

作者： Danfeng Wu Shuyun Zhou Congcong Du Juan Li Jianyu Huang Hong-xia Shen abh.ya k.datye Shan Jiang Jeffrey T.Miller Sen Lin Haifeng Xiong State key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China State key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350002China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China College of Biology and Chemical Engineering Jiaxing UniversityJiaxing 314000China Department of Chemical&Biological Engineering University of New MexicoAlbuquerqueNM 8731-0001USA Davidson School of Chemical Engineering Purdue UniversityWest LafayetteIN 47907-2100USA Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IkkEM) Xiamen 361102China Fujian key Laboratory of Rare-earth Functional Materials Fujian Shanhai Collaborative Innovation Center of Rare-earth Functional MaterialsLongyan 366300China

The local structure of the metal single-atom site is closely related to the catalytic activity of metal single-atom catalysts(SACs).However,constructing SACs with homogeneous metal active sites is a challenge due to the surface heterogeneity of the conventional ***,we prepared two Rh1/CeO_(2)SACs(0.5Rh1/r-CeO_(2)and 0.5Rh1/c-CeO_(2),respectively)using two shaped CeO_(2)(rod and cube)exposing different facets,i.e.,CeO_(2)(111)and CeO_(2)(100).In CO oxidation reaction,the T100 of 0.5Rh1/r-CeO_(2)SACs is 120°C,while the T100 of 0.5Rh1/c-CeO_(2)SACs is as high as 200°*** in-situ CO diffuse reflectance infrared Fourier transform spectroscopy(CO-DRIFTS),we found that the proximity between OH group and Rh single atom on the plane surface plays an important role in the catalytic activity of Rh1/CeO_(2)SAC system in CO *** Rh single atom trapped at the CeO_(2)(111)crystal surface forms the Rh1(OH)adjacent species,which is not found on the CeO_(2)(100)crystal surface at room ***,during CO oxidation,the OH group far from Rh single atom on the 0.5Rh1/c-CeO_(2)disappears and forms Rh1(OH)adjacent species when the temperature is above 150°*** formation of Rh1(OH)adjacentCO intermediate in the reaction is pivotal for the excellent catalytic activity,which explains the difference in the catalytic activity of Rh single atoms on two different CeO_(2)*** formed Rh1(OH)adjacent-O-Ce structure exhibits good stability in the reducing atmosphere,maintaining the Rh atomic dispersion after CO oxidation even when pre-reduced at high temperature of 500°*** functional theory(DFT)calculations validate the unique activity and reaction path of the intermediate Rh1(OH)adjacentCO species *** work demonstrates that the proximity between metal single atom and hydroxyl can determine the formation of active intermediates to affect the catalytic performances in catalysis.

关键词： crystal plane Rh1/CeO_(2)single-atom catalyst proximity of Rh and hydroxyl coordination structure CO oxidation

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Atom trapping: a novel approach to generate thermally stable and regenerable single-atom catalysts

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National Science Review 2018年第5期5卷 630-632页

作者： abh.ya datye Yong Wang Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials University of New Mexico The Gene & Linda Voiland School of Chemical Engineering and Bioengineering Washington State University Institute for Integrated Catalysis Pacific Northwest National Laboratory

An important goal of heterogeneous catalyst synthesis is the dispersion of the active metal uniformly on a catalyst support, ideally achieving atomic *** single atoms dispersed on oxide supports provide efficient util... 详细信息

关键词： Pt Atom trapping a novel approach to generate thermally stable and regenerable single-atom catalysts

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Fatigue Crack Growth Behavior of Different Zones in an Annealed Automatic Gas Tungsten Arc Weld Joint of TA16 and TC4 Titanium Alloys

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Journal of Wuhan University of Technology(Materials Science) 2020年第6期35卷 1090-1097页

作者： SHAO Ling WU Sujun PENG Wenya datye Amit JU Hongbo LIU Ying Research Institute of Zhejiang University-Taizhou Zhejiang UniversityTaizhou 318000China School of Materials Science and Engineering Beihang UniversityBeijing 100191China AECC Hunan Aviation Powerplant Research Institute Zhuzhou 412000China Department of Mechanical Engineering&Materials Science Yale UniversityNew HavenCT 06511USA key Laboratory of Advanced Welding Technology of Jiangsu Province Jiangsu University of Science and TechnologyZhenjiang 212003China Institute of Technology of Aircraft Engine Beijing Research Institute of Aviation EngineeringBeijing 100024China

Based on the investigated microstructure of different zones in the annealed automatic gas tungsten arc weld joint of TA16 and TC4 titanium alloys,the mechanical property of them was assessed under fatigue crack growth rate *** evaluation of fatigue crack growth rate,three points bending specimens were *** correlation between the range of stress intensity factor and crack growth rate was determined in different zones of the annealed weld *** crack growth rates were obviously different in different zones of weld joint of dissimilar titanium alloys,due to their different *** electron microscope examinations were conducted on the fracture surface in order to determine the relevant fracture mechanisms and crack growth mechanisms with respect to the details of microstructure.

关键词： dissimilar titanium alloys joining weld joint microstructure fatigue crack growth rate fracture

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Revealing the relationships between alloy structure,composition and plastic deformation in a ternary alloy system by a combinatorial approach

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Journal of Materials Science & Technology 2021年第25期84卷 97-104页

作者： Jianping Lai Wen Hu Amit datye Jingbei Liu Jan Schroers Udo D.Schwarz Jiaxin Yu key Laboratory of Testing Technology for Manufacturing Process in Ministry of Education State Key Laboratory of Environment-friendly Energy MaterialsSouthwest University of Science and TechnologyMianyang 621010China Department of Mechanical Engineering and Materials Science Yale UniversityNew HavenCT 06511USA Department of Chemical and Environmental Engineering Yale UniversityNew HavenCT 06511USA

A high-throughput approach based on magnetron co-sputtering of alloy libraries is employed to investigate mechanical properties of crystalline and amorphous alloys in a ternary palladium(Pd)-tungsten(W)-silicon(Si)system with the aim to reveal the difference in plastic deformation response and extract the relevant structure-property relationships of the alloys in the *** was found that in contrast to crystalline alloys,the amorphous ones,i.e.,metallic glasses,exhibited a much smaller fluctuation range in the plasticity parameters(Er2/H and Wp/Wt),indicating a significant difference in the plastic deformation mechanism controlling the mechanical properties for the respective *** propose that the inhomogeneous deformation of amorphous alloys localized in thin shear bands is responsible for the weaker compositional dependence of both plasticity parameters,while dislocation gliding in crystalline materials is significantly more dependent on the exact structure,thus resulting in a larger scattering *** on the representative efficient cluster packing model,a set of composition-dependent atomic structural models is proposed to figure out the structure-property relationships of amorphous alloys in Pd-W-Si alloy system.

关键词： High-throughput Metallic glass Plastic deformation Magnetron co-sputtering Nanoindentation Mechanical properties

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聚丙烯腈纤维的差别化品种

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国外纺织技术（纺织针织服装化纤染整） 1998年第12期 29-35页

作者： k.V.datye 沈云

就采用的单体、用不同共聚单体制备共聚物的能力及其比例、能否给制得的聚合物提供离子基因、聚合介质及各种纺丝方法和后处理路线等而论,纤维用丙烯腈系和乙烯基聚合物及共聚物有许多不同的品种.所以在合成纤维中,这类纤维的改性品种... 详细信息

就采用的单体、用不同共聚单体制备共聚物的能力及其比例、能否给制得的聚合物提供离子基因、聚合介质及各种纺丝方法和后处理路线等而论,纤维用丙烯腈系和乙烯基聚合物及共聚物有许多不同的品种.所以在合成纤维中,这类纤维的改性品种数量最多:可任意改变其染色性,以得到不同的可染纤维;可改变纺丝溶液的添加剂,

关键词：腈纶差别化品种品种生产工艺

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聚丙烯腈纤维的差别化品种

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国外纺织技术 1998年第12期 29-35页

作者： k.V.datye 沈云

关键词：纤维收缩率相对分子质量原丝聚丙烯睛纺丝溶液

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混合染料中配伍性能的评价

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国外纺织技术 1984年第2期 45-46页

作者： k. V. datye 王汉曾

1.引言混合染料中评价染料配伍性能的常规方法是在有控制的试验室实验情况下评价染浴中或纤维上各染料的含量。这些方法既费时又麻烦,全靠评价染料的浓度,不是评价染色者所感兴趣的色光深度。各个染料的半染时间、分散系数及其他经验的... 详细信息

1.引言混合染料中评价染料配伍性能的常规方法是在有控制的试验室实验情况下评价染浴中或纤维上各染料的含量。这些方法既费时又麻烦,全靠评价染料的浓度,不是评价染色者所感兴趣的色光深度。各个染料的半染时间、分散系数及其他经验的动力因数在理论情况下测得的数据可能与在混合染料中或

关键词：混合染料染色情况配伍性能酸性红染色时间

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原子捕获法调控单原子结构制备高分散、强耐水性的铂-钯双金属簇（～1 nm）催化剂

原子捕获法调控单原子结构制备高分散、强耐水性的铂-钯双金属簇...

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中国化学会第十九届全国催化学术会议

作者：熊海峰李恒宇王勇 abh.ya k.datye 厦门大学化学化工学院 University of New Mexico Washington State University

原子捕获法是一种制备热稳定、高分散催化剂的新方法。采用原子捕获法制备的铂单原子与CeO形成共价键,在氧化条件下具有高的热稳定性(800摄氏度)。在该报告中,我们以预捕获的单原子作为核心位点制备双金属铂钯催化剂,探讨了铂的存在对... 详细信息

原子捕获法是一种制备热稳定、高分散催化剂的新方法。采用原子捕获法制备的铂单原子与CeO形成共价键,在氧化条件下具有高的热稳定性(800摄氏度)。在该报告中,我们以预捕获的单原子作为核心位点制备双金属铂钯催化剂,探讨了铂的存在对钯的成核影响(Pd-Pt@CeO催化剂),其催化性能与浸渍法制备的Pt-Pd/CeO催化剂进行了对比。

关键词：甲烷氧化铂钯双金属原子捕获耐水性

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