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Exploring the impact of Nafion modifier on electrocatalytic CO_(2) reduction over cu catalyst

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Journal of Energy Chemistry 2024年第1期88卷 543-551,I0012页

作者： Yingshi Su Yonghui Cheng Zhen Li Yanjia cui Caili Yang Ziyi Zhong Yibing Song Gongwei Wang Lin Zhuang College of Chemistry&Chemical Engineering and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityShantou 515063GuangdongChina College of Chemistry and Molecular Sciences Hubei Key Lab of Electrochemical Power SourcesWuhan UniversityWuhan 430072HubeiChina The Institute for Advanced Studies Wuhan UniversityWuhan 430072HubeiChina Department of Chemistry Engineering Guangdong Technion-Israel Institute of Technology(GTIIT)Shantou 515063GuangdongChina Technion-Israel Institute of Technology(IIT) Haifa 32000Israel

Nafion as a universal polymer ionomer was widely applied for nanocatalysts electrode preparation.However,the effect of Nafion on electrocatalytic performance was often overlooked,especially for CO_(2)electrolysis.Herein,the key roles of Nafion for CO_(2)RR were systematically studied on cu nanoparticles(NPs)electrocatalyst.We found that Nafion modifier not only inhibit hydrogen evolution reaction(HER)by decreasing the accessibility of H_(2)O from electrolyte to cu NPs,and increase the CO_(2)concentration at electrocatalyst interface for enhancing the CO_(2)mass transfer process,but also activate CO_(2)molecule by Lewis acid-base interaction between Nafion and CO_(2)to accelerate the formation of^(*)CO,which favor of C–C coupling for boosting C_(2)product generation.Owing to these features,the HER selectivity was suppressed from 40.6%to 16.8%on optimal cu@Nafion electrode at-1.2 V versus reversible hydrogen electrode(RHE),and as high as 73.5%faradaic efficiencies(FEs)of C_(2)products were achieved at the same applied potential,which was 2.6 times higher than that on bare cu electrode(~28.3%).In addition,Nafion also contributed to the long-term stability by hinder cu NPs morphology reconstruction.Thus,this work provides insights into the impact of Nafion on electrocatalytic CO_(2)RR performance.

关键词： Nafion modifier CO_(2)reduction cu nanoparticles In situ ATR-SEIRAS C_(2)product

Preparation and particle size characterization of cu nanoparticles prepared by anodic arc plasma

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Rare Metals 2006年第2期25卷 172-176页

作者： WEI Zhiqiang XIA Tiandong FENG Wangjun DAI Jianfeng WANG Qing LI Weixue YAN Pengxun School of Sciences Lanzhou University of Technology Lanzhou 730050 China College of Materials Science and Engineering Lanzhou University of Technology Lanzhou 730050 China Institute of Plasma and Metal Materials Lanzhou University Lanzhou 730000 China

Copper nanoparticles were successfully prepared in large scale by means of anodic arc discharging plasma method in inert atmosphere. The particle size, specific surface area, crystal structure, and morphology of the samples were characterized by X-ray diffraction （XRD）, BET equation, transmission electron microscopy （TEM）, and the corresponding selected area electron diffraction （SAED）. The experimental results indicate that the crystal structure of the samples is fcc structure the same as that of the bulk materials. The specific surface area is 11 m^2/g, the particle size distribution is 30 to 90 nm, and the average particle size is about 67 nm obtained from TEM and confirmed from XRD and BET results. The nanoparticles with uniform size, high purity, narrow size distribution and spherical shape can be prepared by this convenient and effective method.

关键词： metal materials cu nanoparticles anodic arc plasma particle size structure

Enhancement of Polar Kerr Effect by Forming cu nanoparticles on Ni Surface

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过程工程学报 2004年第Z1期4卷 32-32页

作者：任盛源江海邦陈冠章 Institute of Physics Academia Sinica Taipei 11529 China Institute of Optoelectronic Sciences NTOU Keelung 202 China

cu(x)/Ni(y)/glass bi-layer films, with x ranging from 10 to 310 A andy = 85 A, were made by the vapor evaporation method in a good vacuum. The surface morphology of each bi-layer was examined by an atomic force microscope (AFM). The results show that when x = 10 and 40 A, respectively, there are, in particular, a large number of cu nanoparticles (or nano-islands) forming on top of the Ni surface.As a result, we observed considerable enhancement of either the polar Kerr rotation (θk) or the extraordinary Hall coefficient (Rs) at these two thicknesses (e.g. checking the figure below). As well known, the penetration depth (δp), of the polarized electrons, crossing the cu/Ni interface from the Ni to the cu layer, is of the order of the electron mean free path, i.e. δp =(3/8)[cu≈90 A. in the cu layer. Therefore.the strong enhancement of θK is due to the enhanced surface plasma resonance effect on the polarized cu nanoparticles. Moreover. the formation of cu nanoparticles roughens the bi-layer's surface greatly.That means the enhancement of Rs is due to the increase of the surface resistivity ρs.

关键词： cu nanoparticles magneto-optical Kerr effect Hall effect

Copper-based metal-organic frameworks for electrochemical reduction of CO_(2)

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Chinese Chemical Letters 2023年第6期34卷 111-120页

作者： Xiaomin Kang Guodong Fu Xian-Zhu Fu Jing-Li Luo Shenzhen Key Laboratory of Polymer Science and Technology Guangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China School of Mechanical Engineering University of South ChinaHengyang 421001China

The electrochemical CO_(2)reduction reaction(CO_(2)ER)is an emerging process that involves utilizing CO_(2)to produce valuable chemicals and fuels by consuming excess electricity from renewable sources.Recently,cu and cu-based nanoparticles,as earth-abundant and economical metal sources,have been attracting significant interest.The chemical and physical properties of cu-based nanoparticles are modified by different strategies,and CO_(2)can be converted into multicarbon products.Among various cu-based nanoparticles,cu-based metal-organic frameworks(MOFs)are gaining increasing interest in the field of catalysis because of their textural,topological,and electrocatalytic properties.In this minireview,we summarized and highlighted the main achievements in the research on cu-based MOFs and their advantages in the CO_(2)ER as electrocatalysts,supports,or precursors.

关键词： CO_(2)electrochemical reduction cu nanoparticles cu-based MOFs Electrocatalysts Electrochemical reduction reaction

Enhancement of Polar Kerr Effect by Forming cu nanoparticles on Ni Surface

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Enhancement of Polar Kerr Effect by Forming Cu Nanoparticles...

Exploitation of a photoelectrochemical sensing platform for bisphenol A quantitative determination using cu/graphitic carbon nitride nanocomposites

中国颗粒学会2004年年会暨海峡两岸颗粒技术研讨会会议

作者：任盛源江海邦陈冠章 Institute of Physics Academia SinicaTaipei 11529China Institute of Optoelectronic Sciences NTOUKeelung 202China Institute of Physics Academia SinicaTaipei 11529China

＜正＞cu（x）/Ni（y）/glass bi-layer films, with x ranging from 10 to 310 A and y = 85 A, were made by the vapor evaporation method in a good vacuum. The surface morphology of each bi-layer was examined by an atomic force microscope （AFM）. The results show that when x = 10 and 40 A, respectively, there are, in particular, a large number of cu nanoparticles （or nano-islands） forming on top of the Ni surface. As a result, we observed considerable enhancement of either the polar Kerr rotation （θK） or theextraordinary Hall coefficient （RS） at these two thicknesses （e.g. checking the figure below）. As well known, the penetration depth （δp） of the polarized electrons, crossing the cu/Ni interface from the Ni to the cu layer. is of the order of the electron mean free path, i.e. δp =（3/8）[cu≈90 A. in the cu layer. Therefore. the strong enhancement of θK is due to the enhanced surface plasma resonance effect on the polarized cu nanoparticles. Moreover, the formation of cu nanoparticles roughens the bi-layer’s surface greatly. That means the enhancement of Rs is due to the increase of the surface resistivity ρs.

关键词： cu nanoparticles magneto-optical Kerr effect Hall effect

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Chinese Chemical Letters 2018年第11期29卷 1629-1632页

作者： Sheng Feng Pengcheng Yan Li Xu Jiexiang Xia Huaming Li School of Environmental and Safety Engineering Changzhou University Institute for Energy Research School of Chemistry and Chemical EngineeringJiangsu University

A simple and effective photoelectrochemical sensor was fabricated by cu/graphitic carbon nitride （cu/g- CN） composites for detecting bisphenol A. The cu/g-CN composites were obtained via a solvothermal process in the presence of the copper-based ionic liquid. In view of localized surface plasmon resonance ofcu nanoparticles, cu nanoparticles can promote light absorbance and rapid electron transport ofg-CN. As a result, the cu/g-CN composites obtained greatly enhancement of photocurrent, when compared to the pure g-CN. In addition, the introduction of bisphenol A can hinder electron-hole recombination, resulting in sensitive photoelectrochemical monitoring of bisphenol A. The detection limit of the bisphenol A photoelectrochemical sensor was below 0.012 μmol/L. The bisphenol A photoelectrochemical sensor exhibited an excellent stability and acceptable anti-interference. The photoelectrochemical sensor provided the promising platform to monitor bisphenol A at low concentration in water environment.

关键词： Photoelectrochemical detection Graphitic carbon nitride cu nanoparticles Bisphenol A Localized surface plasmon resonance

Single Step Microwave Assisted Synthesis and Antimicrobial Activity of Silver, Copper and Silver-Copper nanoparticles

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Journal of Materials Science and Chemical Engineering 2020年第8期8卷 13-29页

作者： Myrna Reyes-Blas Nadja M. Maldonado-Luna Carla M. Rivera-Quiñones Ana L. Vega-Avila Felix R. Roman-Velázquez Oscar J. Perales-Perez Department of Chemistry University of Puerto Rico at Mayagüez Mayaguez USA Department of Mechanical Engineering University of Puerto Rico at Mayagüez Mayaguez USA Department of Chemical Engineering University of Puerto Rico at Mayagüez Mayaguez USA Department of Engineering Science & Materials University of Puerto Rico at Mayagüez Mayaguez USA

Copper and silver nanoparticles were synthesized and characterized in two minutes at 175°C in a one-step synthesis using a modified polyol (ethylene glycol) method and a microwave heating process. We successfully synthesized spherical Silver (Ag) and Copper nanoparticles (cuNP) with a crystallite size of less than 10 nm, as well as irregular silver-copper nanoparticles (AgcuNP) with a crystallite size of less than 15 nm, as confirmed by X-Ray Diffraction (XRD) and High-Resolution Transmission Electron Microscopy (HRTEM). The successful synthesis of AgcuNP with 1:1 molar ratio and constituted by 51.74% of copper and 48.26% of silver was corroborated using the Energy Dispersive X-ray (EDX) mapping technique. The AgNP and AgcuNP exhibited more stability in suspension, in comparison to cuNP, as observed by continuously monitoring the absorbance with UV-Vis spectroscopy for 12 days. Furthermore, the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of AgNP, cuNP, and AgcuNP were determined, against Gram-negative and Gram-positive bacteria, and yeast. The obtained MIC and MBC values indicate that Agcu nanoparticles exhibited bactericidal properties greater than its constituents. On the contrary, antifungal activity of AgcuNP against yeast was not observed.

关键词： Ag nanoparticles cu nanoparticles Microwave Synthesis Modified Polyol Method Antimicrobial Properties Agcu nanoparticles