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Engineering the axial coordination of cobalt single atom catalysts for efficient photocatalytic hydrogen evolution

Nano Research 2024年第6期17卷 5114-5121页

作者： Ning Kang Lingwen Liao Xue Zhang Zhen He binlu yu Jiahong Wang Yongquan Qu Paul KChu Seeram Ramakrishna Xue-Feng yu Xin Wang Licheng Bai Materials Interfaces Center Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences(CAS)Shenzhen 518055China Key Laboratory of Materials Physics Anhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of SciencesHefei 230031China Department of Chemistry City University of Hong KongKowloonHong Kong 999077China Hong Kong Branch of National Precious Metals Material Engineering Research Center(NPMM) City University of Hong KongKowloonHong Kong 999077China Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Department of Physics and Department of Materials Science and Engineering City University of Hong KongKowloonHong Kong 999077China National University of Singapore(NUS)Centre for Nanofibers and Nanotechnology Department of Mechanical EngineeringNational University of SingaporeSingapore 117542Singapore

Improving the catalytic activity of non-noble metal single atom catalysts(SACs)has attracted considerable attention in materials *** optimizing the local electronic structure of single atom can greatly improve their catalytic activity,it often involves in-plane modulation and requires high ***,we report a novel strategy to manipulate the local electronic structure of SACs via the modulation of axial Co-S bond anchored onto graphitic carbon nitride(C_(3)N_(4))at room temperature(RT).Each Co atom is bonded to four N atoms and one S atom(Co-(N,S)/C_(3)N_(4)).Owing to the greater electronegativity of S in the Co-S bond,the local electronic structure of the Co atoms is available to be controlled at a relatively moderate ***,when employed for the photocatalytic hydrogen evolution reaction,the adsorption energy of intermediate hydrogen(H*)on the Co atoms is remarkably *** the presence of the Co-(N,S)/C_(3)N_(4)SACs,the hydrogen evolution rates reach up to 10 mmol/(g·h),which is nearly 10 and 2.5 times greater than the rates in the presence of previously reported transition metal/C_(3)N_(4)and noble platinum nanoparticles(PtNPs)/C_(3)N_(4)catalysts,*** to the tailorable axial Co-S bond in the SAC,the local electronic structure of the Co atoms can be further optimized for other photocatalytic *** axial coordination engineering strategy is universal in catalyst designing and can be used for a variety of photocatalytic applications.

关键词： transition metal single-atom local electronic structure photocatalytic hydrogen evolution graphitic carbon nitride axial coordination environment

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Understanding angle-resolved polarized Raman scattering from black phosphorus at normal and oblique laser incidences

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Science Bulletin 2020年第22期65卷 1894-1900,M0004页

作者： Miao-Ling Lin yu-Chen Leng Xin Cong Da Meng Jiahong Wang Xiao-Li Li binlu yu Xue-Lu Liu Xue-Feng yu Ping-Heng Tan State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering&CAS Center of Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100049China Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China College of Physics Science and Technology Hebei UniversityBaoding 071002China Beijing Academy of Quantum Information Science Beijing 100193China

The selection rule for angle-resolved polarized Raman(ARPR)intensity of phonons from standard grouptheoretical method in isotropic materials would break down in anisotropic layered materials(ALMs)due to birefringence and linear dichroism *** two effects result in depth-dependent polarization and intensity of incident laser and scattered signal inside ALMs and thus make a challenge to predict ARPR intensity at any laser incidence ***,taking in-plane anisotropic black phosphorus as a prototype,we developed a so-called birefringence-linear-dichroism(BLD)model to quantitatively understand its ARPR intensity at both normal and oblique laser incidences by the same set of real Raman tensors for certain laser *** fitting parameter is needed,once the birefringence and linear dichroism effects are considered with the complex refractive *** approach was proposed to experimentally determine real Raman tensor and complex refractive indexes,respectively,from the relative Raman intensity along its principle axes and incident-angle resolved reflectivity by Fresnel’s *** results suggest that the previously reported ARPR intensity of ultrathin ALM flakes deposited on a multilayered substrate at normal laser incidence can be also understood based on the BLD model by considering the depth-dependent polarization and intensity of incident laser and scattered Raman signal induced by both birefringence and linear dichroism effects within ALM flakes and the interference effects in the multilayered structures,which are dependent on the excitation wavelength,thickness of ALM flakes and dielectric layers of the *** work can be generally applicable to any opaque anisotropic crystals,offering a promising route to predict and manipulate the polarized behaviors of related phonons.

关键词： Angle-resolved polarized Raman scattering Anisotropic layered material Birefringence Linear dichroism Real Raman tensor Complex refractive index

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二维黑磷的制备、表面功能化与光电催化

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无机盐工业 2021年第5期53卷 13-20页

作者：杨环环喻彬璐王佳宏喻学锋深圳二维原子晶体制备技术工程研究中心中国科学院深圳先进技术研究院广东深圳518055 中国科学院大学

黑磷作为一种新型的单元素直接带隙半导体,因其独特的二维结构展现出诸多优异特性,在光电、生物、传感、信息等领域具有很大的应用潜力。近年来,针对黑磷的制备和应用,发展出许多新方法和新技术,例如:通过液相超声/剪切、高能球磨、电... 详细信息

黑磷作为一种新型的单元素直接带隙半导体,因其独特的二维结构展现出诸多优异特性,在光电、生物、传感、信息等领域具有很大的应用潜力。近年来,针对黑磷的制备和应用,发展出许多新方法和新技术,例如:通过液相超声/剪切、高能球磨、电化学剥离和等离子体辅助剥离等技术实现了二维黑磷的高效制备;发展了系列物理、化学方法对二维黑磷进行表面修饰,抑制其与水、氧接触,提高了二维黑磷的稳定性并提升了光电等物理性能;借助构建异质结构、掺杂等方式改变黑磷表面电子态密度、增加活性位点,提高了二维黑磷材料的催化活性。从二维黑磷的制备、表面功能化与光电催化三方面出发,综述目前的研究现状和未来可能的发展方向。

关键词：黑磷二维材料剥离表面功能化光电催化

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铜尾矿资源的利用现状及展望

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现代矿业 2017年第1期33卷 127-131页

作者：张宏泉李琦缘文进沈海燕王振喻彬璐邱志勇武汉理工大学材料科学与工程学院硅酸盐建筑材料国家重点实验室

介绍了我国铜尾矿的利用现状和应用途径,并对铜尾矿在保温隔热材料中的应用进行了分析与展望。利用铜尾矿研制的多孔陶瓷保温隔热建筑材料不仅可减少大量排放铜尾矿带来的环境污染问题,还可以有效提高铜尾矿资源的利用率、降低生产成本... 详细信息

介绍了我国铜尾矿的利用现状和应用途径,并对铜尾矿在保温隔热材料中的应用进行了分析与展望。利用铜尾矿研制的多孔陶瓷保温隔热建筑材料不仅可减少大量排放铜尾矿带来的环境污染问题,还可以有效提高铜尾矿资源的利用率、降低生产成本,为我国大量铜尾矿废弃物的再利用提供新的发展模式,对发展地区经济和构建环境友好型和资源节约型社会具有重要的社会意义。

关键词：铜尾矿综合利用建筑材料

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种群动力学模型解的振动性和渐近性

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生物数学学报 1998年第1期13卷 26-31页

作者：冯滨鲁李光华俞元洪山东矿业学院基础部泰安271019 湖南财经学院数学系长沙410006 中国科学院应用数学研究所北京100080

本文考虑当环境的容纳量为单调或者振动时，单种群增长模型解的振动性和渐近性，所得定理推广了文献[5］中的结果．

关键词：种群动力学单种群模型容纳量振动性

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