Electrochem最新文献_第9页

Chitosan/Gold Nanoparticles Nanocomposite Film for Bisphenol A Electrochemical Sensing 壳聚糖/金纳米复合膜用于双酚A电化学传感

Electrochem Pub Date : 2022-05-04 DOI: 10.3390/electrochem3020016

Leandro A. Almeida, Bruno V. M. Rodrigues, D. T. Balogh, R. C. Sanfelice, L. Mercante, A. F. Frade-Barros, A. Pavinatto

{"title":"Chitosan/Gold Nanoparticles Nanocomposite Film for Bisphenol A Electrochemical Sensing","authors":"Leandro A. Almeida, Bruno V. M. Rodrigues, D. T. Balogh, R. C. Sanfelice, L. Mercante, A. F. Frade-Barros, A. Pavinatto","doi":"10.3390/electrochem3020016","DOIUrl":"https://doi.org/10.3390/electrochem3020016","url":null,"abstract":"Bisphenol A (BPA) is considered an endocrine-disrupting compound and can cause toxicological effects, even at low doses. The development of sensitive and reliable sensors that would allow the detection of such contaminant is highly pursued. Herein, we report an electrochemical sensing strategy based on a simple and low-cost nanocomposite film sensor platform for BPA detection. The platform was developed by modifying a fluorine-doped tin oxide (FTO) electrode with layer-by-layer (LbL) films of chitosan (Chi) and gold nanoparticles functionalized with a polythiophene derivative (AuNPs:PTS). The growth of the Chi/AuNPs:PTS LbL films was monitored by UV–Vis spectroscopy. Electrochemical characterization revealed that the three-bilayer film exhibited the highest electrocatalytic performance and differential-pulse voltammetry (DPV) measurements demonstrated that the modified electrode was suitable for BPA detection through a quasi-reversible and adsorption-controlled electrochemical oxidation and reduction process. The developed sensor exhibited a linear response range from 0.4 to 20 μmol L−1, with a detection limit of 0.32 μmol L−1. The sensor showed good reproducibility with relative standard deviations of 2.12% and 3.73% to intra- and inter-electrode, respectively. Furthermore, the platform demonstrated to be suitable to detect BPA in real water samples, as well as selective for BPA detection in solutions with 100-fold excess of common interfering compounds.","PeriodicalId":11612,"journal":{"name":"Electrochem","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87851430","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: 4

N-Graphene Sheet Stacks/Cu Electrocatalyst for CO2 Reduction to Ethylene n -石墨烯片堆/Cu电催化剂用于二氧化碳还原成乙烯

Electrochem Pub Date : 2022-05-01 DOI: 10.3390/electrochem3020015

P. Lesnicenoks, A. Knoks, S. Piskunov, Laimonis Jēkabsons, J. Kleperis

{"title":"N-Graphene Sheet Stacks/Cu Electrocatalyst for CO2 Reduction to Ethylene","authors":"P. Lesnicenoks, A. Knoks, S. Piskunov, Laimonis Jēkabsons, J. Kleperis","doi":"10.3390/electrochem3020015","DOIUrl":"https://doi.org/10.3390/electrochem3020015","url":null,"abstract":"Renewable energy resources (wind, solar) are unpredictable, so it is wise to store the electricity they generate in an energy carrier X. Various PtX (power to useful energy-intensive raw material such as hydrogen, synthetic natural gas, fuel) applications have been proposed. At the heart of our work is widely used idea to convert residual CO2 from biogas plant into higher hydrocarbons using electricity from renewables (e.g., sun, wind, hydro). The specific goal is to produce ethylene-highly demanded hydrocarbon in plastics industry. The process itself is realised on electrocatalytic carbon/copper cathode which must be selective to reaction: 2CO2 + 12e− + 12H+→C2H4 + 4H2O. We propose a bottom-up approach to build catalyst from the smallest particles-graphene sheet stacks (GSS) coated with metallic copper nanocrystals. Composite GSS-Cu structure functions as a CO2 and proton absorber, facilitating hydrogenation and carbon–carbon coupling reactions on Cu-nanocluster/GSS for the formation of C2H4. In our design electrocatalytic electrode is made from nitrogen-doped graphene sheet stacks coated with copper nanostructures. The N-GSSitself can be drop-casted or electrophoretically incorporated onto the carbon paper and gas diffusion electrode. Electrochemical deposition method was recognized as successful and most promising to grow Cu nanocrystals on N-GSS incorporated in conducting carbon substrate. Gaseous products from CO2 electro-catalytic reformation on the cathode were investigated by mass-spectrometer but the electrode surface was analysed by SEM/EDS and XRD methods.","PeriodicalId":11612,"journal":{"name":"Electrochem","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74533236","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: 2

Advances in Electrochemical Energy Storage Systems 电化学储能系统研究进展

Electrochem Pub Date : 2022-04-21 DOI: 10.3390/electrochem3020014

Qi Zhang, Wenhui Pei, Xudong Liu

引用次数: 2

Alkaloid of Rhynchostylis retusa as Green Inhibitor for Mild Steel Corrosion in 1 M H2SO4 Solution 柳条草生物碱在1 M H2SO4溶液中对低碳钢的缓蚀作用

Electrochem Pub Date : 2022-04-18 DOI: 10.3390/electrochem3020013

A. Chapagain, Debendra Acharya, A. Das, Kisan Chhetri, H. Oli, A. Yadav

{"title":"Alkaloid of Rhynchostylis retusa as Green Inhibitor for Mild Steel Corrosion in 1 M H2SO4 Solution","authors":"A. Chapagain, Debendra Acharya, A. Das, Kisan Chhetri, H. Oli, A. Yadav","doi":"10.3390/electrochem3020013","DOIUrl":"https://doi.org/10.3390/electrochem3020013","url":null,"abstract":"Alkaloids are aromatic hydrocarbons with nitrogen as heteroelements in the ring structure that are responsible for bonding with the metal surface and help to reduce corrosion of metals such as mild steel (MS) in an acidic medium. In this study, the alkaloid of Rhynchostylis retusa (RR) was extracted by solvent extraction method and confirmed by chemical test as well as FTIR spectroscopic test. Extracted alkaloids were tested as green inhibitors for the MS corrosion in a 1.0 M H2SO4 solution. The inhibition efficiency (IE) of alkaloid extracts of RR was studied by the weight loss measurement method and electrochemical polarization method. Results showed that the maximum IE in the gravimetric method was 87.51% in 1000 ppm solution at 6 h immersion time. Open circuit potential (OCP) and potentiodynamic polarization results indicated that the extracted alkaloids acted as a mixed type of inhibitor. IE by polarization method was found to be 93.24% for the sample immersed for 6 h. The temperature effect study reveals that inhibitors can work only below 35 °C. Alkaloids of RR can be successfully extracted and used as corrosion inhibitors for MS in an acidic medium below 35 °C.","PeriodicalId":11612,"journal":{"name":"Electrochem","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87820660","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: 13

Electrodeposition and Micro-Mechanical Property Characterization of Nickel–Cobalt Alloys toward Design of MEMS Components 面向MEMS元件设计的镍钴合金电沉积及微力学性能表征

Electrochem Pub Date : 2022-04-13 DOI: 10.3390/electrochem3020012

Yiming Jiang, Chun-Yi Chen, Xun Luo, D. Yamane, Masanori Mizoguchi, Osamu Kudo, R. Maeda, M. Sone, T. Chang

引用次数: 2

Ferrocene-Based Porous Organic Polymer (FPOP): Synthesis, Characterization and an Electrochemical Study 二茂铁基多孔有机聚合物(FPOP):合成、表征及电化学研究

Electrochem Pub Date : 2022-02-27 DOI: 10.3390/electrochem3010011

Ž. Petrovski, Mateus P. Moreira, Andreia F. M. Santos, Sunny K. S. Freitas, N. Jordão, R. A. Maia, A. Nunes, L. Branco, Hugo Cruz, P. Esteves

{"title":"Ferrocene-Based Porous Organic Polymer (FPOP): Synthesis, Characterization and an Electrochemical Study","authors":"Ž. Petrovski, Mateus P. Moreira, Andreia F. M. Santos, Sunny K. S. Freitas, N. Jordão, R. A. Maia, A. Nunes, L. Branco, Hugo Cruz, P. Esteves","doi":"10.3390/electrochem3010011","DOIUrl":"https://doi.org/10.3390/electrochem3010011","url":null,"abstract":"Ferrocene-based porous organic polymers (FPOPs) were prepared from phenol-formaldehyde polymer (Bakelite) and phenol as starting materials; and two possible mechanisms for polymerization were discussed. Solid-state 13C CP-MAS NMR, FTIR, powder XRD, elemental analysis and ICP (Fe, Na, B) were performed to characterize the prepared materials. The two synthetic approaches produced polymers with different pore sizes: the FPOP synthesized through Bakelite presented a higher surface area (52 m2 g−1) when compared to the one obtained by the bottom-up polymerization from phenol (only 5 m2 g−1). Thermogravimetric analysis confirmed the thermal stability of the material, which decomposed at 350 °C. Furthermore, cyclic voltammetry (CV) of the new FPOP on modified electrodes, in ACN and 0.1 M TBAP as an electrolyte, showed fully reversible electron transfer, which is similar to that observed for the ferrocene probe dissolved in the same electrolyte. As a proof-of-concept for an electrochromic device, this novel material was also tested, with a color change detected between yellow/brownish coloration (reduced form) and green/blue coloration (oxidized form). The new hybrid FPOP seems very promising for material science, energy storage and electrochromic applications, as well as for plastic degradation.","PeriodicalId":11612,"journal":{"name":"Electrochem","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87918317","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

Graphene: Chemistry and Applications for Lithium-Ion Batteries 石墨烯:锂离子电池的化学和应用

Electrochem Pub Date : 2022-02-25 DOI: 10.3390/electrochem3010010

Roshny Joy, Neethu T. M. Balakrishnan, A. Das, S. Shafeek, V. Thakur, K. Zaghib, Jabeen Fatima Manamkeri Jaffarali, M. V. Reddy, P. Raghavan

{"title":"Graphene: Chemistry and Applications for Lithium-Ion Batteries","authors":"Roshny Joy, Neethu T. M. Balakrishnan, A. Das, S. Shafeek, V. Thakur, K. Zaghib, Jabeen Fatima Manamkeri Jaffarali, M. V. Reddy, P. Raghavan","doi":"10.3390/electrochem3010010","DOIUrl":"https://doi.org/10.3390/electrochem3010010","url":null,"abstract":"In the present era, different allotropes of carbon have been discovered, and graphene is the one among them that has contributed to many breakthroughs in research. It has been considered a promising candidate in the research and academic fields, as well as in industries, over the last decade. It has many properties to be explored, such as an enhanced specific surface area and beneficial thermal and electrical conductivities. Graphene is arranged as a 2D structure by organizing sp2 hybridized C with alternative single and double bonds, providing an extended conjugation combining hexagonal ring structures to form a honeycomb structure. The precious structure and outstanding characteristics are the major reason that modern industry relies heavily on graphene, and it is predominantly applied in electronic devices. Nowadays, lithium-ion batteries (LIBs) foremostly utilize graphene as an anode or a cathode, and are combined with polymers to use them as polymer electrolytes. After three decades of commercialization of the lithium-ion battery, it still leads in consumer electronic society due to its higher energy density, wider operating voltages, low self-discharge, noble high-temperature performance, and fewer maintenance requirements. In this review, we aim to give a brief review of the domination of graphene and its applications in LIBs.","PeriodicalId":11612,"journal":{"name":"Electrochem","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89745484","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: 9

Hydrogen Bond Donors Influence on the Electrochemical Performance of Composite Graphene Electrodes/Deep Eutectic Solvents Interface 氢键供体对复合石墨烯电极/深共晶溶剂界面电化学性能的影响

Electrochem Pub Date : 2022-02-10 DOI: 10.3390/electrochem3010009

A. T. Brandão, Renata Costa, A. F. Silva, C. Pereira

{"title":"Hydrogen Bond Donors Influence on the Electrochemical Performance of Composite Graphene Electrodes/Deep Eutectic Solvents Interface","authors":"A. T. Brandão, Renata Costa, A. F. Silva, C. Pereira","doi":"10.3390/electrochem3010009","DOIUrl":"https://doi.org/10.3390/electrochem3010009","url":null,"abstract":"The development of energy storage devices with better performance relies on the use of innovative materials and electrolytes, aiming to reduce the carbon footprint through the screening of low toxicity electrolytes and solvent-free electrode design protocols. The application of nanostructured carbon materials with high specific surface area, to prepare composite electrodes, is being considered as a promising starting point towards improving the power and energy efficiency of energy storage devices. Non-aqueous electrolytes synthesized using greener approaches with lower environmental impact make deep eutectic solvents (DES) promising alternatives for electrochemical energy storage and conversion applications. Accordingly, this work proposes a systematic study on the effect of the composition of DES containing a diol and an amide as HBD (hydrogen bond donor: 1,2-propylene glycol and urea), on the electrochemical performance of graphene and graphite composite electrodes/DES electrolyte interface. Glassy carbon (GC) was selected as the bare electrode material substrate to prepare the composite formulations since it provides an electrochemically reproducible surface. Gravimetric capacitance was measured for commercial graphene and commercial graphite/GC composite electrodes in contact with choline chloride, complexed with 1,2-propylene glycol, and urea as the HBD in 1:2 molar ratio. The electrochemical stability was followed by assessing the charge/discharge curves at 1, 2, and 4 A g−1. For comparison purposes, a parallel study was performed using commercial graphite. A four-fold increase in gravimetric capacitance was obtained when replacing commercial graphite (1.70 F g−1) by commercial graphene (6.19 F g−1) in contact with 1,2-propylene glycol-based DES. When using urea based DES no significant change in gravimetric capacitance was observed when commercial graphite is replaced by commercial graphene.","PeriodicalId":11612,"journal":{"name":"Electrochem","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74625574","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: 2

Electrochemical and Mechanistic Study of Superoxide Scavenging by Pyrogallol in N,N-Dimethylformamide through Proton-Coupled Electron Transfer 邻苯三酚通过质子耦合电子转移清除N,N-二甲基甲酰胺中超氧化物的电化学和机理研究

Electrochem Pub Date : 2022-02-08 DOI: 10.3390/electrochem3010008

Tatsushi Nakayama, Ryo Honda, K. Kuwata, S. Usui, B. Uno

引用次数: 4

Acknowledgment to Reviewers of Electrochem in 2021 《电化学》2021年审稿人答谢

Electrochem Pub Date : 2022-02-08 DOI: 10.3390/electrochem3010007

引用次数: 0