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Electrochemical Deposition of Reduced Graphene Oxide Decorated with Silver and Nickel Oxide Nanoparticles for Quantification of Ascorbic Acid in Bottled Fruit Juice and Vitamin C Tablet 电化学沉积修饰氧化石墨烯纳米银和氧化镍定量瓶装果汁和维生素C片中的抗坏血酸
ECS Advances Pub Date : 2023-08-15 DOI: 10.1149/2754-2734/acf059
Tadele Hunde Wondimu, T. D. Desissa, Aleemayehu Dubale Duma, Fetene Fufa Bakare, D. Kabtamu, D. Andoshe, Osman Ahmed Zelekew, Bruk Sisay Woldeyohannis, A. W. Bayeh, Kena Dechasa Gemeda, Kenate Sambaba Bayana
{"title":"Electrochemical Deposition of Reduced Graphene Oxide Decorated with Silver and Nickel Oxide Nanoparticles for Quantification of Ascorbic Acid in Bottled Fruit Juice and Vitamin C Tablet","authors":"Tadele Hunde Wondimu, T. D. Desissa, Aleemayehu Dubale Duma, Fetene Fufa Bakare, D. Kabtamu, D. Andoshe, Osman Ahmed Zelekew, Bruk Sisay Woldeyohannis, A. W. Bayeh, Kena Dechasa Gemeda, Kenate Sambaba Bayana","doi":"10.1149/2754-2734/acf059","DOIUrl":"https://doi.org/10.1149/2754-2734/acf059","url":null,"abstract":"Because of its simplicity of evaluation, ability to detect the lowest quantities, and convenience of operation, electrochemical determination of ascorbic acid is gaining popularity. The high sensitivity, selectivity, and low cost, nanosensors have gained enourmous attention in recent years for the detection of active pharmacological compounds and food pollutants. Ni and Ni-containing compounds have a favorable affinity for a number of organic functional groups such as -thio, -hydroxyl, -carboxyl, and -amine. However, its poor conductivity hinders its electrochemical performance. Hence, the procedures for improving the conductivity of metal oxides that are incredibly good studies query to meet the desired level of detection. We devised a straightforward method for concurrently synthesizing silver and nickel oxide nanoparticles on reduced graphene oxide using electrochemical deposition method on a glassy carbon electrode (GCE). The electrodeposited materials were scratched from GCE and characterized for Raman, SEM/EDS, EIS, and XPS. The materials produced after deposition were examined also for Ascorbic Acid (AA) detection in bottled fruit juice and Vitamin C tablets yielded 0.457 μM limits of quantification and 100.61% and 99.40% average recoveries, respectively.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114417707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimization of Pore Formation Process of Lotus Aluminum by Phase Field Simulation 相场模拟优化莲花铝孔隙形成过程
ECS Advances Pub Date : 2023-08-08 DOI: 10.1149/2754-2734/acee15
Kei Takahashi, K. Yamaguchi, Y. Sasajima, T. Ikeda
{"title":"Optimization of Pore Formation Process of Lotus Aluminum by Phase Field Simulation","authors":"Kei Takahashi, K. Yamaguchi, Y. Sasajima, T. Ikeda","doi":"10.1149/2754-2734/acee15","DOIUrl":"https://doi.org/10.1149/2754-2734/acee15","url":null,"abstract":"We have used multi-phase field simulation to mimic the actual process of lotus aluminum production, i.e., unidirectional solidification of aluminum in a hydrogen atmosphere. We used PD control and PID control, conventional methods of feedback control, to control the pore width precisely in the simulation. The pore width was shown to decrease slowly in PID control due to the slow feedback of I-control, and PD control was shown to produce stable long pores, although the pore width became larger than the target pore width. The initial hydrogen concentration in the liquid, which was controlled by atmospheric hydrogen pressure, had a significant effect on the pore growth; the higher the hydrogen concentration, the thicker the pore width and vice versa. It was also clarified that the pore width and the elongation length of the pore took various values depending on the combination of PD parameters even if the same target value was set.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132735787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fabrication and Growth Mechanism of Nano-Octahedrons: A Study on Cu2O Core-Shell Structures for Oxygen Evolution Reaction 纳米八面体的制备及其生长机理——氧化二氧核壳结构析氧反应的研究
ECS Advances Pub Date : 2023-08-01 DOI: 10.1149/2754-2734/acec5d
A. Parkash
{"title":"Fabrication and Growth Mechanism of Nano-Octahedrons: A Study on Cu2O Core-Shell Structures for Oxygen Evolution Reaction","authors":"A. Parkash","doi":"10.1149/2754-2734/acec5d","DOIUrl":"https://doi.org/10.1149/2754-2734/acec5d","url":null,"abstract":"This paper explores the process and growth mechanism involved in fabricating nano-octahedrons. Using two key components, CTAB and hydrazine hydrate, leads to the formation of octahedral shapes. A Cu2O octahedral core–shell structure was successfully created by employing a coating technique, and its performance in the oxygen evolution reaction (OER) was thoroughly evaluated. Due to its high dispersibility in ammonia solution, Cu2O serves as an excellent representative for other components. Additionally, this chapter provides a detailed account of the production of octahedral nanocages through the ammonia etching method. Notably, the Cu2O nano octahedra demonstrate superior OER performance compared to commercial RuO2, exhibiting a significantly low overpotential of only 370 mV at 10 mA cm−2. These findings bear important implications for designing stable core/shell nanostructures and hollow structures by implementing appropriate chemicals while also deepening our understanding of the formation of octahedral shapes.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132157565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrochemical Performance of a Spatially Distributed ECPrOx Reactor 空间分布ECPrOx反应器的电化学性能
ECS Advances Pub Date : 2023-07-31 DOI: 10.1149/2754-2734/acec00
Ivonne Karina Pena Arias, R. Hanke-Rauschenbach, K. Sundmacher
{"title":"Electrochemical Performance of a Spatially Distributed ECPrOx Reactor","authors":"Ivonne Karina Pena Arias, R. Hanke-Rauschenbach, K. Sundmacher","doi":"10.1149/2754-2734/acec00","DOIUrl":"https://doi.org/10.1149/2754-2734/acec00","url":null,"abstract":"In this contribution a spatially distributed Electrochemical Preferential Oxidation (ECPrOx) reactor is evaluated and the influence of the temperature, CO inlet concentration, feed flow rate and relative humidity on the polarization curve, the local current distribution and the CO outlet concentration, selectivity and conversion are investigated. For that, six different cases are studied under galvanostatic and potentiostatic operation. For Galvanostatic operation, it was observed that depending on the operation conditions, the bifurcation point as well as the frequency and amplitude of the oscillations can be modified. Additionally, several spatiotemporal profiles of the local current density were found. For potentiostatic operation, the spatiotemporal profiles are constant with time, however they are affected by the anode overvoltage. Finally, after the bifurcation point, the temporal averaged anode overvoltage and the CO outlet concentration is always lower for galvanostatic control.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129501883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Li-Ni Metal Oxides Processed with Rapid Atmospheric-Pressure-Plasma Jet for Flexible Gel-Electrolyte Li-Ion Hybrid Supercapacitors 柔性凝胶-电解质锂离子混合超级电容器用快速大气压等离子体射流处理Li-Ni金属氧化物
ECS Advances Pub Date : 2023-07-06 DOI: 10.1149/2754-2734/ace4dd
Chia-Ling Wu, I‐Chih Ni, Chih-I Wu, I. Cheng, Chien-Fu Chen, Jian-Zhang Chen
{"title":"Li-Ni Metal Oxides Processed with Rapid Atmospheric-Pressure-Plasma Jet for Flexible Gel-Electrolyte Li-Ion Hybrid Supercapacitors","authors":"Chia-Ling Wu, I‐Chih Ni, Chih-I Wu, I. Cheng, Chien-Fu Chen, Jian-Zhang Chen","doi":"10.1149/2754-2734/ace4dd","DOIUrl":"https://doi.org/10.1149/2754-2734/ace4dd","url":null,"abstract":"We use screen printing to deposit LiCl + Ni(NO3)2·6H2O pastes on a flexible carbon cloth substrate and then calcine it using a nitrogen atmospheric-pressure-plasma jet (APPJ). Through the high-temperature treatment by APPJ, pastes can be rapidly converted into Li-Ni oxides (LNOs). The LNOs on carbon cloth are then used as the electrodes of flexible gel-electrolyte Li-ion hybrid supercapacitors (Li-ion HSCs). The best areal capacity of 21.076 mC cm−2, as measured by cyclic voltammetry, is achieved by APPJ treatment at 620 °C for 480 s. To demonstrate the flexibility of the Li-ion HSCs, the Li-ion HSCs were bent at different curvatures to measure its performance. After bending test, the capacity remains >93% under bending with a curvature of up to 2 cm−1.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116741364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrochemical Energy Storage Properties of Sm2FeCuO6 Double Perovskite Synthesized via Sol-Gel Route 溶胶-凝胶法制备Sm2FeCuO6双钙钛矿的电化学储能性能
ECS Advances Pub Date : 2023-07-06 DOI: 10.1149/2754-2734/ace120
M. Devi, Irina Rogge, Jashandeep Singh, Amit L. Sharma, Ashavani Kumar, Ajay Kumar
{"title":"Electrochemical Energy Storage Properties of Sm2FeCuO6 Double Perovskite Synthesized via Sol-Gel Route","authors":"M. Devi, Irina Rogge, Jashandeep Singh, Amit L. Sharma, Ashavani Kumar, Ajay Kumar","doi":"10.1149/2754-2734/ace120","DOIUrl":"https://doi.org/10.1149/2754-2734/ace120","url":null,"abstract":"The rare Earth-based double perovskites have been widely studied due to their exceptional physical properties and wide range of technological applications. Despite the extensive investigation of copper-based rare Earth double perovskites and a limited study of samarium-based double perovskites, no reports on the synthesis and characterization of Sm2FeCuO6 have been found in the literature. This work presents the experimental investigation on the synthesis of Sm2FeCuO6 via a wet chemical sol-gel route and the characterization of its structural and electrochemical properties using various techniques. The results showed that Sm2FeCuO6 have good electrochemical properties, making it a promising candidate for use in electrochemical energy storage applications.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"154 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116385233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The Impact of Silicon Dioxide Nanoparticle Size on the Viscosity and Stability of Nanofluids: A Comprehensive Study 二氧化硅纳米颗粒尺寸对纳米流体粘度和稳定性影响的综合研究
ECS Advances Pub Date : 2023-07-03 DOI: 10.1149/2754-2734/ace121
A. N. Payzullaev, B. A. Allaev, S. Mirzaev, J. M. Abdiev, J. Urinov, A. Parkash
{"title":"The Impact of Silicon Dioxide Nanoparticle Size on the Viscosity and Stability of Nanofluids: A Comprehensive Study","authors":"A. N. Payzullaev, B. A. Allaev, S. Mirzaev, J. M. Abdiev, J. Urinov, A. Parkash","doi":"10.1149/2754-2734/ace121","DOIUrl":"https://doi.org/10.1149/2754-2734/ace121","url":null,"abstract":"This study investigated the impact of silicon dioxide nanoparticle size on the viscosity and stability of nanofluids. A comprehensive study was conducted, including the synthesis and characterization of silicon dioxide nanoparticles of varying sizes, as well as the preparation and testing of nanofluids with different nanoparticle concentrations. The results show that nanoparticle size has a significant effect on both the viscosity and stability of nanofluids, with smaller nanoparticles leading to higher viscosity and improved stability. Silicon dioxide nanoparticles were dispersed in deionized water at mass fractions of 0.5% and 3% and average particle diameters of 12 nm and 40 nm using an ultrasonic disperser. The rheological properties of the obtained nanofluids at 304 K were studied depending on the mass concentration and linear size of nanoparticles in the liquid. An analysis of the results showed that the viscosity of the nanofluids increased with decreasing linear size of the nanoparticles. These findings have important implications for the development and optimization of nanofluid-based applications in various industries, such as electronics, energy, and biomedical engineering.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"63 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120892992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reproducibly Defining Electrode Area of Carbon Paper Electrodes via Machine Cutting and High-Throughput Waxing 通过机器切割和高通量打蜡可重复定义碳纸电极的电极面积
ECS Advances Pub Date : 2023-06-27 DOI: 10.1149/2754-2734/ace203
Rokas Gerulskis, S. Minteer
{"title":"Reproducibly Defining Electrode Area of Carbon Paper Electrodes via Machine Cutting and High-Throughput Waxing","authors":"Rokas Gerulskis, S. Minteer","doi":"10.1149/2754-2734/ace203","DOIUrl":"https://doi.org/10.1149/2754-2734/ace203","url":null,"abstract":"Carbon paper is one of the most common carbon electrode materials employed in electrochemical research due to its low cost, disposability, and controllable dimensions and scaling. Carbon paper is usually hand cut and a variety of strategies are used to define electrode area. This procedure is tedious, imprecise, and inaccurate, yielding coefficients of variation in peak current output as high as 20%. Imprecision in hand-preparation translates directly to poor reproducibility in electrochemical data leading to challenges in directly comparing data across research groups and research fields. This work introduces an inexpensive and precise method to automatically cut and rapidly wax carbon paper electrodes, circumventing laborious traditional preparation and substantially improving precision in electrochemical data.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127696168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Effect of Reducing Agent for Synthesizing Palladium Nanoparticle on Carbon Nanotube Support and Its Superior Catalytic Activity towards Methanol Oxidation Reaction 还原剂对碳纳米管载体合成钯纳米颗粒的影响及其对甲醇氧化反应的优异催化活性
ECS Advances Pub Date : 2023-06-01 DOI: 10.1149/2754-2734/acdb86
S. Yasmin, M. Kabir, Nipa Roy, S. Jeon
{"title":"The Effect of Reducing Agent for Synthesizing Palladium Nanoparticle on Carbon Nanotube Support and Its Superior Catalytic Activity towards Methanol Oxidation Reaction","authors":"S. Yasmin, M. Kabir, Nipa Roy, S. Jeon","doi":"10.1149/2754-2734/acdb86","DOIUrl":"https://doi.org/10.1149/2754-2734/acdb86","url":null,"abstract":"In this report, we have synthesized carbon nanotube supported palladium nanoparticles (CNT-Pd) by using different reducing agents such as sodium borohydride (SBH), hydrazine monohydrate (HY) and ascorbic acid (AA) for the methanol oxidation reaction (MOR) in alkaline media. The elemental and morphological properties of all catalysts are verified by HRTEM, XPS, and XRD. From the HRTEM images, it is found that CNT-Pd reduced by sodium borohydride CNT-Pd (SBH) exhibited a narrow size distribution of Pd nanoparticles (PdNPs) with an average size of 3.15 nm. The role of the reducing agents (SBH, HY, and AA) is investigated by applying them as anode catalysts for the methanol oxidation reaction (MOR) and it is found that the reducing agent remarkably affected the electrochemical activities. CNT-Pd (SBH) catalysts show the superior catalytic activity and durability towards MOR among all catalysts, which may be due to the Pd NPs in CNT-Pd (SBH) having a perfect crystal structure with a narrow size distribution.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"450 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132022697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Photocurrent Generation Properties of Half-Photocell Consisting of Electropolymerized Hierarchical Polythiophene Thin Films as Photoexciting Electron Donor and C60 as Electron Acceptor 电聚合多层聚噻吩薄膜为光激发电子给体、C60为电子受体的半光电池的光电流产生特性
ECS Advances Pub Date : 2023-06-01 DOI: 10.1149/2754-2734/acdf72
Kengo Kanbe, T. Akiyama, T. Oku
{"title":"Photocurrent Generation Properties of Half-Photocell Consisting of Electropolymerized Hierarchical Polythiophene Thin Films as Photoexciting Electron Donor and C60 as Electron Acceptor","authors":"Kengo Kanbe, T. Akiyama, T. Oku","doi":"10.1149/2754-2734/acdf72","DOIUrl":"https://doi.org/10.1149/2754-2734/acdf72","url":null,"abstract":"Polybithiophene/poly(3,4-ethylenedioxythiophene)/indium-tin-oxide coated transparent glass electrodes were prepared by sequential electrochemical polymerization with cyclic voltammetry. The thickness of polybithiophene films was varied by the scan rate of applied potentials during polymerization. Obtained hierarchical polythiophene films were characterized by absorption spectra, fluorescence spectra, scanning electron microscopy, laser microscopy, and atomic force microscopy. Half-photocell properties of the hierarchical polythiophene thin films were evaluated by a three-electrode electrochemical cell in CH2Cl2 solution of electrolyte and C60 as a sacrificial electron acceptor under irradiation of monochromatic light. The thickness and absorbance of hierarchical polythiophene thin films increased by decreasing of scan rate of applied potentials during the polymerization of polybithiophene. While, maximum peaks of fluorescence intensity and internal quantum yield of cathodic photocurrent were observed at 20 nm thickness of polythiophene film under irradiation from the glass side of the transparent electrode. Almost maximum external quantum efficiencies of cathodic photocurrent were observed from 20 nm to 1.5 μm thicknesses of polythiophene films. These tendencies suggest that CH2Cl2 solution of C60 and electrolyte penetrate into the polybithiophene layer up to 1.5 μm.","PeriodicalId":338397,"journal":{"name":"ECS Advances","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116662721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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