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Wet-chemical synthesis and applications of amorphous metalcontaining nanomaterials

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Nano Research 2023年第4期16卷 4289-4309页

作者： Jinzhe Liang Yiyao Ge Zhen He Qinbai Yun guigao liu Shiyao Lu Li Zhai Biao Huang Hua Zhang Department of Chemistry City University of Hong KongHong KongChina Hong Kong Branch of National Precious Metals Material Engineering Research Center(NPMM) City University of Hong KongHong KongChina Shenzhen Research Institute City University of Hong KongShenzhen 518057China National Special Superfine Powder Engineering Research Center School of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094China

In the past decades,metal-containing nanomaterials have attracted increasing interests owing to their intriguing physicochemical properties and various promising *** research has revealed that the phase of metal-containing nanomaterials could significantly affect their properties and *** particular,nanomaterials with amorphous phase,which possess long-range disordered atomic arrangements,and the amorphous/crystalline heterophase nanostructures comprised of both amorphous and crystalline phases,have exhibited superior performance in various applications,e.g.,catalysis and energy *** this review,a brief overview of the recent progress on the wet-chemical synthesis and applications of amorphous and amorphous/crystalline heterophase metal-containing nanomaterials has been ***,on the basis of different categories of metal-containing nanomaterials,including metals,metal alloys,and metal compounds,their synthetic routes and promising applications will be ***,current challenges and some personal perspectives in this emerging research field will be proposed.

关键词： wet-chemical synthesis metal-containing nanomaterials amorphous nanomaterials amorphous/crystalline heterophase catalysis

Synthesis of amorphous Pd-based nanocatalysts for efficient alcoholysis of styrene oxide and electrochemical hydrogen evolution

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Nano Research 2023年第4期16卷 4650-4655页

作者： Yiyao Ge Jingjie Ge Biao Huang Xixi Wang guigao liu Xiang-Huan Shan Lu Ma Bo Chen Guanghua liu Songmo Du An Zhang Hongfei Cheng Qingbo Wa Shiyao Lu Lujiang Li Qinbai Yun Kuo Yuan Qinxin Luo Zhichuan J.Xu Yonghua Du Hua Zhang Department of Chemistry City University of Hong KongHong KongChina Hong Kong Branch of National Precious Metals Material Engineering Research Center(NPMM) City University of Hong KongHong KongChina Shenzhen Research Institute City University of Hong KongShenzhen 518057China Department of Chemical and Biological Engineering HKUST Jockey Club Institute for Advanced Study&Energy InstituteThe Hong Kong University of Science and TechnologyHong KongChina School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Department of Chemistry University of Science and Technology of ChinaHefei 230026China National Synchrotron Light Source II Brookhaven National LaboratoryUptonNew York 11973USA State Key Laboratory of New Ceramics&Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Amorphous nanomaterials with long-range disordered structures could possess distinct properties and promising applications,especially in catalysis,as compared with their conventional crystalline *** is imperative to achieve the controlled preparation of amorphous noble metal-based nanomaterials for the exploration of their phase-dependent ***,we report a facile wet-chemical reduction strategy to synthesize various amorphous multimetallic Pd-based nanomaterials,including PdRu,PdRh,and *** phase-dependent catalytic performances of distinct Pd-based nanomaterials towards diverse catalytic applications have been ***,the usage of PdRu nanocatalysts with amorphous and crystalline face-centered cubic(fcc)phases can efficiently switch the ring-opening route of styrene oxide to obtain different products with high selectivity through alcoholysis reaction and hydrogenation reaction,***,when used as an electrocatalyst for hydrogen evolution reaction(HER),the synthesized amorphous PdRh nanocatalyst exhibits low overpotential and high turnover frequency values,outperforming its crystalline fcc counterpart and most of the reported Pd-based HER electrocatalysts.

关键词： amorphous nanomaterials Pd-based nanocatalysts phase engineering of nanomaterials ring-opening reaction of styrene oxide electrocatalytic hydrogen evolution

Crystal phase-controlled growth of PtCu and PtCo alloys on 4H Au nanoribbons for electrocatalytic ethanol oxidation reaction

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Nano Research 2020年第7期13卷 1970-1975页

作者： Jie Wang Jian Zhang guigao liu Chongyi Ling Bo Chen Jingtao Huang Xiaozhi liu Bing Li An-Liang Wang Zhaoning Hu Ming Zhou Ye Chen Hongfei Cheng Jiawei liu Zhanxi Fan Nailiang Yang Chaoliang Tan Lin Gu Jinlan Wang Hua Zhang Department of Chemistry City University of Hong KongHong KongChina Center for Programmable Materials School of Materials Science and EngineeringNanyang Technological University50 Nanyang AvenueSingapore 639798Singapore School of Physics Southeast UniversityNanjing 211189China Institute of Physics Beijing National Laboratory for Condensed Matter PhysicsChinese Academy of SciencesBeijing 100190China Institute of Materials Research and Engineering(IMRE) Agency for Science Technology and Research(A*STAR)Singapore 138634Singapore Hong Kong Branch of National Precious Metals Material Engineering Research Center(NPMM) City University of Hong KongHong KongChina

Crystal phase can greatly affect the physicochemical properties and applications of ***,it stil remains a great challenge to synthesize nanostructures with the same composition and morphology but different phases in order to explore the phase-dependent properties and ***,we report the crystal phase-controlled synthesis of PtCu alloy shells on 4H Au nanoribbons(NRBs),referred to as 4H-Au NRBs,to form the 4H-Au@PtCu core-shell *** tuning the thickness of PtCu,4H-PtCu and face-centered cubic(cc)phase PICu(cc-PtCu)alloy shells are successtully grown on the 4H-Au NRB *** thickness-dependent phase-controlled growth strategy can also be used to grow PtCo alloys with 4H or fcc phase on 4H-Au ***,when used as electrocatalysts for the ethanol oxidation reaction(EOR)in alkaline media,the 4H-Au@4H-PtCu NRBs show much better EOR performance than the 4H-Au@fcc-PtCu NRBs,and both of them possess superior performance compared to the commercial Pt *** study provides a strategy on phase-contolled synthesis of nanomaterials used for crystal phase-dependent applications.

关键词： crystal phase 4H hexagonal face-ce ntered cubic ethanol oxidation reaction phase engineering of nanomaterials

在4H晶相Au纳米带上外延生长非常规晶相4H-Pd基合金纳米结构用于高效甲醇电催化氧化

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物理化学学报 2023年第10期39卷 110-116页

作者：汪婕刘贵高韵勤柏周希琛刘效治陈也程洪飞葛一瑶黄京韬胡兆宁陈博范战西谷林张华西华大学材料科学与工程学院流体与动力机械教育部重点实验室成都610039 南洋理工大学材料科学与工程学院可编程材料中心新加坡新加坡639798 香港城市大学化学系中国香港香港城市大学国家贵金属材料工程研究中心香港分中心中国香港香港城市大学深圳研究院广东深圳518057 中国科学院物理研究所北京凝聚态物理国家实验室北京100190 南京理工大学化学化工学院国家特种超细粉体工程研究中心南京210094 香港中文大学化学系中国香港清华大学材料科学与工程系北京国家电子显微镜中心与先进材料实验室北京100084

Pd基合金纳米材料通常具有传统的面心立方(fcc)晶相。本文以密排六方4H相Au(4H-Au)纳米带为模板,外延生长非常规4H晶相的PdFe、PdIr和PdRu,形成4H-Au@PdM(M=Fe、Ir和Ru)核壳合金纳米带。合成的4H-Au@PdFe纳米带被用于碱性环境中甲醇电... 详细信息

Pd基合金纳米材料通常具有传统的面心立方(fcc)晶相。本文以密排六方4H相Au(4H-Au)纳米带为模板,外延生长非常规4H晶相的PdFe、PdIr和PdRu,形成4H-Au@PdM(M=Fe、Ir和Ru)核壳合金纳米带。合成的4H-Au@PdFe纳米带被用于碱性环境中甲醇电催化氧化反应(MOR)的催化剂,表现出优越的质量活性(3.69 A·mgPd^(−1)),分别为Pt/C和Pd黑催化剂质量活性的2.4和10.5倍,也跻身于最好的Pd基和Pt基MOR电催化剂之列。这一策略为合理设计和可控合成具有非常规晶相的多金属纳米结构提供了策略,从而为深入研究多金属纳米结构晶相依赖的性质和应用提供了可能。

关键词：纳米材料相工程晶相 4H相 Pd基合金甲醇氧化反应

A universal method for rapid and large‐scale growth of layered crystals

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SmartMat 2020年第1期1卷 77-84页

作者： Apoorva Chaturvedi Bo Chen Keke Zhang Qiyuan He Gwang‐Hyeon Nam Lu You Zhuangchai Lai Chaoliang Tan Thu Ha Tran guigao liu Jiadong Zhou Zheng liu Junling Wang Edwin H.T.Teo Hua Zhang Center for Programmable Materials School of Materials Science and EngineeringNanyang Technological UniversitySingaporeSingapore Department of Chemistry City University of Hong KongHong KongChina Department of Materials Science and Engineering City University of Hong KongHong KongChina Jiangsu Key Laboratory of Thin Films School of Physical Science and TechnologySoochow UniversitySuzhouChina Department of Electrical Engineering City University of Hong KongHong KongChina Department of Physics Southern University of Science and TechnologyShenzhenGuangdongChina School of Electric and Electronic Engineering Nanyang Technological UniversitySingaporeSingapore Hong Kong Branch of National Precious Metals Material Engineering Research Center(NPMM) City University of Hong KongHong KongChina

Layered van der Waals(vdW)materials,consisting of atomically thin layers,are of paramount importance in physics,chemistry,and materials science owing to their unique properties and various promising ***,their fast and large‐scale growth via a general approach is still a big challenge,severely limiting their practical ***,we report a universal method for rapid(~60 min)and large‐scale(gram scale)growth of phase‐pure,high‐crystalline layered vdW materials from their elementary powders via microwave plasma heating in sealed *** method can be used for growth of 30 compounds with different components(binary,ternary,and quaternary)and *** ferroelectric and transport properties of mechanically exfoliated flakes validate the high crystal quality of the grown *** study provides a general strategy for the fast and large‐scale growth of layered vdW materials with appealing physiochemical properties,which could be used for various promising applications.

关键词： 2D materials ferroelectric field‐effect transistors layered compounds universal method

含适配器的潜射导弹运载器跨介质发射分离建模与仿真

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兵工学报 2023年第5期44卷 1237-1250页

作者：刘冰程栋卢丙举陈霄瀚乐贵高南京理工大学机械工程学院江苏南京210094 中国船舶集团有限公司第七一三研究所河南郑州450015

以含弹性适配器导弹运载器的跨介质弹射分离问题为对象,基于分数容积障碍法,采用流体体积多相流理论和RNG k-ε湍流模式建立导弹运载器水面分离多物理场耦合模型。以圆柱体入水为仿真算例进行数值模拟,计算值与实验结果吻合良好,验证了... 详细信息

以含弹性适配器导弹运载器的跨介质弹射分离问题为对象,基于分数容积障碍法,采用流体体积多相流理论和RNG k-ε湍流模式建立导弹运载器水面分离多物理场耦合模型。以圆柱体入水为仿真算例进行数值模拟,计算值与实验结果吻合良好,验证了数值模型的精度和有效性。分别对导弹在波谷、波峰环境下的弹射出水,以及在不同初始俯仰角和出水初速度下的弹射分离过程进行数值模拟,得出初始俯仰角、出水速度、出水位置对运载器式导弹水面分离的影响。综合考虑波峰、波谷位置出水筒-弹分离时刻导弹的俯仰角并以波谷位置出水筒-弹分离时刻导弹俯仰角达到0°为准则,得到最佳初始俯仰角为3.24°。仿真方法和结果对工程应用具有重要参考价值。

关键词：潜射导弹运载器跨介质弹道特性

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含弹性适配器的运载器式潜射导弹分离研究

兵器装备工程学报 2022年第3期43卷 136-144页

作者：刘冰刘科薛瑞娟张凌雲乐贵高南京理工大学机械工程学院南京210094 中国船舶集团公司第七一三研究所郑州450000

针对运载器式潜射导弹水面弹射分离问题,采用RNG k-ε湍流模型和VOF模型,基于分数容积障碍网格法,建立含适配器的运载器式潜射导弹水面分离多物理场耦合模型。在数值模型与实验对比验证其精度和有效性基础上,对运载器出水过程中不同的... 详细信息

针对运载器式潜射导弹水面弹射分离问题,采用RNG k-ε湍流模型和VOF模型,基于分数容积障碍网格法,建立含适配器的运载器式潜射导弹水面分离多物理场耦合模型。在数值模型与实验对比验证其精度和有效性基础上,对运载器出水过程中不同的导弹弹射起始高度、初始姿态角对动平台分离特性影响进行了数值模拟,仿真结果表明:弹射过程中,弹射起始高度越大,运载器和导弹的位移与姿态角变化越大;运载器和导弹倾斜10°出水比倾斜5°出水,弹射过程中运载器和导弹的位移和姿态角变化更大,而且运载器和导弹的速度变化更慢。仿真方法和结果对工程应用具有参考价值。

关键词：潜射导弹弹射起始高度姿态角分离运动

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导流结构对火箭炮冲击载荷的影响

兵器装备工程学报 2022年第8期43卷 74-79,86页

作者：王惠方刘洋佐乐贵高任杰代波西北机电工程研究所陕西咸阳712099 南京理工大学南京210094

针对狭小空间中火箭炮发射遇到的燃气射流排导问题,提出了一种由栅格与楔形组合方式的新型导流结构。该结构主要是在方形发射箱的尾部设计栅格阵列导流片组成,并且可以随着发射箱一起做回转运动和俯仰运动。利用大型CFD计算软件中的高... 详细信息

针对狭小空间中火箭炮发射遇到的燃气射流排导问题,提出了一种由栅格与楔形组合方式的新型导流结构。该结构主要是在方形发射箱的尾部设计栅格阵列导流片组成,并且可以随着发射箱一起做回转运动和俯仰运动。利用大型CFD计算软件中的高速可压缩流动计算模块,构建火箭炮发射时的三维燃气流数值模型,对流项采用二阶Roe差分格式离散,时间积分采用四阶龙格库塔方法积分,以取得良好的物理解。对比分析了传统导流结构与新型导流结构对燃气流的导流性能,掌握了火箭炮发射过程中的冲击载荷变化规律。研究结果表明:与传统导流方式相比,新型导流结构导流效果较好,使用该结构时燃气射流对火箭炮的冲击力最大可降低57.14%。该研究对火箭炮的结构设计具有参考价值。

关键词：火箭炮燃气射流计算流体力学冲击载荷栅格导流

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燃气-蒸汽弹射气液两相流场流动耦合特性研究

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固体火箭技术 2023年第6期46卷 955-962页

作者：王凯苟金澜乐贵高李仁凤刘纪伟南京理工大学机械工程学院南京210094 武汉第二船舶设计研究所武汉430064 郑州航空工业管理学院航空工程学院郑州450046

为研究燃气-蒸汽弹射中气液两相流场的流动耦合特性,基于Mixture模型和RNG k-ε湍流模型并结合自定义汽化凝结程序,建立了考虑汽化效应、组分输运和动网格影响的数值模型,并通过模拟发动机尾焰注水试验验证了模型的有效性。在此基础上... 详细信息

为研究燃气-蒸汽弹射中气液两相流场的流动耦合特性,基于Mixture模型和RNG k-ε湍流模型并结合自定义汽化凝结程序,建立了考虑汽化效应、组分输运和动网格影响的数值模型,并通过模拟发动机尾焰注水试验验证了模型的有效性。在此基础上对复杂波系的形成和气液流动耦合特性进行了分析,并研究了喷水孔直径对气液两相流场的影响。研究表明:因管道结构和水射流约束而产生的系列膨胀波与压缩波会在管道内相交反射形成波系,波系通过影响两相流的属性将内流场划分为不同的区域。在弯管内因离心力作用而形成的迪恩涡能增强湍流强度,提高水汽转换传质传热的效率,同时水射流对燃气流有较强的阻滞与挤压作用,两者会因能量的差异而在喷水管处相互挤压。喷水孔总面积相同时,直径越小,质量流率越小,水汽转换效率越高;直径越大,温度和压强的波动越大,导弹的运动越不平稳。研究结果可为燃气-蒸汽弹射的流场分析和结构设计提供参考。

关键词：燃气蒸汽弹射动力弯管气液两相流流动耦合特性喷水孔直径

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