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Selective CO_(2)Electroreduction to Multi-Carbon Products on Organic-Functionalized CuO Nanoparticles by Local Micro-Environment Modulation

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Nano-Micro Letters 2024年第12期16卷 120-132页

作者： Shan Ren Xi Cao Qikui Fan zhimao yang Fei Wang Xin Wang Licheng Bai Jian yang Materials Interfaces Center Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongPeople’s Republic of China Key Laboratory of Functional Molecular Solids Ministry of EducationCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002AnhuiPeople’s Republic of China School of Physics Xi’an Jiaotong UniversityXi’an 710049ShaanxiPeople’s Republic of China College of Materials Science and Engineering Shenzhen UniversityShenzhen 518071GuangdongPeople’s Republic of China

Surface functionalization of Cu-based catalysts has demonstrated promising potential for enhancing the electrochemical CO_(2)reduction reaction(CO_(2)RR)toward multi-carbon(C2+)products,primarily by suppressing the parasitic hydrogen evolution reaction and facilitating a localized CO_(2)/CO concentration at the *** upon this approach,we developed surface-functionalized catalysts with exceptional activity and selectivity for electrocatalytic CO_(2)RR to C_(2+)in a neutral *** CuO nanoparticles coated with hexaethynylbenzene organic molecules(HEB-CuO NPs),a remarkable C_(2+)Faradaic efficiency of nearly 90%was achieved at an unprecedented current density of 300 mA cm^(-2),and a high FE(>80%)was maintained at a wide range of current densities(100-600 mA cm^(-2))in neutral environments using a flow ***,in a membrane electrode assembly(MEA)electrolyzer,86.14%FEC2+was achieved at a partial current density of 387.6 mA cm^(-2)while maintaining continuous operation for over 50 h at a current density of 200 mA cm^(-2).In-situ spectroscopy studies and molecular dynamics simulations reveal that reducing the coverage of coordinated K⋅H2O water increased the probability of intermediate reactants(CO)interacting with the surface,thereby promoting efficient C-C coupling and enhancing the yield of C_(2+)*** advancement offers significant potential for optimizing local micro-environments for sustainable and highly efficient C_(2+)production.

关键词： CO_(2)electroreduction to C_(2+) Neutral electrolyte Organic-functionalized CuO nanoparticles Local micro-environment

Cathode Erosion of Graphite and Cu/C Materials in Airarcs

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Journal of Wuhan University of Technology(Materials Science) 2012年第1期27卷 18-20页

作者： Zhang Chengyu Qiao Shengru Liu Yiwen yang zhimao Wang Yaping Yong Guo Science and Technology on Thermostructural Composite Materials Laboratory Northwestern Polytechnical UniversityXi’an710072China School of Science Xi’an Jiaotong UniversityXi’an710049China Department of Chemistry Datong UniversityDatong037000China

Cathode erosion of graphite and Cu/C was studied in direct current arcs, which were ignited between two electrodes comprised of two kinds of carbon materials and a tungsten anode in air. The arced zones on the cathode surface were investigated by a scanning electron microscope. Also, the cathode erosion rates of the investigated materials were measured. The results show that two distinct zone can be seen on both cathodes. The eroded area was located at the zone just opposite to the anode and surrounded by a white zone. The arced surface on the Cu/C containing 9.3 % Cu is rougher than that of the pure graphite. Many particles with various sizes distributed on the Cu/C. The vaporization of Cu can lower the surface temperature and reduce the cathode erosion. Therefore, the cathode erosion rate of the Cu/C is lower than that of the pure graphite.

关键词： Cu/C composite graphite air arc cathode erosion

Yolk-Shell Cu_(2)O@CuO-decorated RGO for High-Performance Lithium-Ion Battery Anode

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Energy & Environmental Materials 2022年第1期5卷 253-260页

作者： Fangzhao Pu Yilu Bai Jian Lv Xintian Zhao Guanchen Wu Chuncai Kong Bosen Lei Xiaojing Zhang Hong Jin zhimao yang MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi’an Jiaotong UniversityShaanxi 710049China Xi’an Jiaotong University Suzhou Academy Suzhou 215123China

Based on the great advantages of an inner hollow structure and excellent solid counterpart capacity,complex hierarchical structures have been widely used as electrodes for lithium-ion ***,hierarchical yolk-shell Cu_(2)O@Cu O-decorated RGO(YSRs)was designed and synthesized via a multistep ***-like Cu_(2)O-decorated RGO was firstly produced,in which GO was reduced slightly while cuprous oxide was ***,the controlled oxidation of Cu_(2)O@RGO led to the synthesis of special YSRs,which were composed of a solid Cu_(2)O core,spur-CuO,CuO shell,and RGO *** anode materials,YSRs could provide considerable capacity ***,the void existed between shells and solid active materials retaining the advantages of inner hollow *** a result,the unique architecture of the materials renders the composites with enhanced electronic and ionic diffusion kinetics,high specific capacity(~894 m Ah g^(-1),0.1 C),and an excellent rate capability.

关键词： copper oxide Cu_(2)O Li-ion battery nanocomposites yolk-shell

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河南省耕地生态环境承载力评价研究

中国农业资源与区划 2019年第10期40卷 195-200页

作者：杨枝茂许昌学院

[目的]通过选取相关的指标因子,针对耕地生态环境,从压力、状态、响应3个层面构建耕地生态环境承载力评价体系,并从数量、空间分布两方面对评价结果进行分析,以增强评价结果的应用性与针对性。[方法]从压力—状态—响应3个方面选取评价... 详细信息

[目的]通过选取相关的指标因子,针对耕地生态环境,从压力、状态、响应3个层面构建耕地生态环境承载力评价体系,并从数量、空间分布两方面对评价结果进行分析,以增强评价结果的应用性与针对性。[方法]从压力—状态—响应3个方面选取评价指标,选取14个指标因子,分析河南省不同区域耕地生态环境承载力的影响。[结果]从数量分布方面看,河南省耕地生态环境承载力以一般区为主,占比达到41.54%,承载力良好区最少,占比11.93%。空间分布上,河南省耕地生态环境承载力表现出明显的地域差异性,呈现出由周围地区向中部地区逐渐减弱的趋势。三门峡市、商丘市等处于耕地生态承载力的第I等级;郑州市、开封市等处于第Ⅳ等级。[结论]虽然文章针对耕地生态环境承载力研究还处于探索阶段,但结果可为河南省耕地生态环境的管理与监测提供依据,并服务于其资源利用与区域发展方针政策的制定。

关键词：耕地生态环境承载力评价河南省

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CuCr25W1Col合金的性能研究

稀有金属材料与工程 2000年第1期29卷 57-60页

作者：赵峰杨志懋丁秉钧西安交通大学西安710049

为节约Cr资源,提高CuCr触头材料的耐电击穿性能并满足其大规模生产的需要,根据W、Co的选择相强化作用,以纯Cu、Cr块为原料,采用Ar气保护熔炼法制备CuCr25W1Col触头合金,并对其性能进行研究。实验结果表明,该合金晶粒尺寸细小,含气量低,... 详细信息

为节约Cr资源,提高CuCr触头材料的耐电击穿性能并满足其大规模生产的需要,根据W、Co的选择相强化作用,以纯Cu、Cr块为原料,采用Ar气保护熔炼法制备CuCr25W1Col触头合金,并对其性能进行研究。实验结果表明,该合金晶粒尺寸细小,含气量低,耐电压强度已达到常规触头材料的水平。

关键词： CuCr 触头材料选择相强化耐电压强度

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纳米Cu阴极斑点短程有向运动分析

稀有金属材料与工程 2007年第1期36卷 68-70页

作者：苏亚凤杨志懋丁秉钧西安交通大学陕西西安710049

采用扫描电子显微镜(SEM)观察了纳米Cu阴极在峰值电流为10A的小击穿电流下首击穿后的阴极表面烧蚀形貌,发现纳米Cu的阴极斑点从产生到熄灭期间的运动(即短程运动)并不是随机的,而是有一定取向的;进一步通过和常规Cu首击穿烧蚀形貌对比,... 详细信息

采用扫描电子显微镜(SEM)观察了纳米Cu阴极在峰值电流为10A的小击穿电流下首击穿后的阴极表面烧蚀形貌,发现纳米Cu的阴极斑点从产生到熄灭期间的运动(即短程运动)并不是随机的,而是有一定取向的;进一步通过和常规Cu首击穿烧蚀形貌对比,分析了产生有向运动的原因。结果表明:纳米Cu阴极斑点的短程有向运动有利于电弧分散,细化晶粒是减轻烧蚀的一种途径。

关键词：纳米Cu 阴极斑点微蚀坑爆破性电子发射

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金属多孔材料应用及制备的研究进展

稀有金属材料与工程 2006年第A02期35卷 30-34页

作者：梁永仁杨志懋丁秉钧西安交通大学金属材料及强度国家重点实验室陕西西安710049

综述了金属多孔材料在作为结构材料和功能材料方面所表现出来的优异性能及其应用。并对固相法、液相法、电沉积法、气相沉积法等金属多孔材料的主要制备方法进行了总结,同时,指出当前金属多孔材料的研究热点和今后所需解决的问题。

关键词：金属多孔制备方法功能应用结构应用

Compressive strain in Cu catalysts:Enhancing generation of C_(2+) products in electrochemical CO_(2) reduction

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Science Bulletin 2024年第18期69卷 2881-2891页

作者： Qikui Fan Pengxu Yan Fuzhu Liu Zhongshuang Xu Pengfei Liang Xi Cao Chenliang Ye Moxuan Liu Lingyi Zhao Shan Ren Huanran Miao Xiai Zhang zhimao yang Xiangdong Ding Jian yang Chuncai Kong Yuen Wu MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter Key Laboratory for Advanced Materials and Mesoscopic Physics of Shaanxi ProvinceSchool of PhysicsXi’an Jiaotong UniversityXi’an 710049China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China College of Chemistry and Materials Science Anhui Normal UniversityWuhu 241002China Department of Power Engineering North China Electric Power UniversityBeijing 102206China College of Chemistry and Chemical Engineering Xi’an University of Science and TechnologyXi’an 710054China Center for Materials and Interfaces Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)School of Chemistry and Materials Scienceand National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei 230026China

Elastic strain in Cu catalysts enhances their selectivity for the electrochemical CO_(2)reduction reaction(eCO_(2)RR),particularly toward the formation of multicarbon(C_(2+))***,the reasons for this selectivity and the effect of catalyst precursors have not yet been ***,we employed a redox strategy to induce strain on the surface of Cu *** transformation was employed to convert Cu nanocrystals to CuxO nanocrystals;these were subsequently electrochemically reduced to form Cu catalysts,while maintaining their compressive *** a flow cell configuration,a current density of 1 A/cm^(2)and Faradaic efficiency exceeding 80%were realized for the C_(2+)*** selectivity ratio of C_(2+)/C1 was also remarkable at 9.9,surpassing that observed for the Cu catalyst under tensile strain by approximately 7.6 ***-situ Raman and infrared spectroscopy revealed a decrease in the coverage of K+ion-hydrated water(K·H_(2)O)on the compressively strained Cu catalysts,consistent with molecular dynamics simulations and density functional theory *** element method simulations confirmed that reducing the coverage of coordinated K·H_(2)O water increased the probability of intermediate reactants interacting with the surface,thereby promoting efficient C–C coupling and enhancing the yield of C_(2+)*** findings provide valuable insights into targeted design strategies for Cu catalysts used in the eCO_(2)RR.

关键词： Strain effect CO_(2)electroreduction to C_(2+) Catalytic selectivity Copper catalyst Water coverage

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银纳米粒子的形状控制合成与应用

稀有金属材料与工程 2007年第8期36卷 1495-1499页

作者：张太蔚张露杨生春杨志懋丁秉钧西安交通大学金属材料强度国家重点实验室陕西西安710049

纳米金属颗粒由于小尺寸效应、表面效应、量子尺寸效应显示出与块体材料不同的热、光、电、磁、催化等性能。纳米金属材料的性能不仅与粒子尺寸有关,而且还受到粒子形貌的影响。近年来,金属纳米粒子的形状控制合成受到了特别的关注。本... 详细信息

纳米金属颗粒由于小尺寸效应、表面效应、量子尺寸效应显示出与块体材料不同的热、光、电、磁、催化等性能。纳米金属材料的性能不仅与粒子尺寸有关,而且还受到粒子形貌的影响。近年来,金属纳米粒子的形状控制合成受到了特别的关注。本文着重评述近年来金属纳米粒子形状控制合成的方法并以银为例介绍了其形状控制合成的最新研究进展。

关键词：金属纳米粒子形状控制银纳米粒子