Portugaliae Electrochimica Acta最新文献_第6页

Efficiency of the Galvanostatic Formation of Anodic Antimony Oxide in Oxalic Acid Solutions 草酸溶液中阳极氧化锑的恒流形成效率

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2022-01-01 DOI: 10.4152/pea.2022400203

C. Girginov, E. Lilov, S. Kozhukharov, V. Lilova

引用次数: 2

Low Cost Electrochemical Sensor for Simultaneous Detection and Estimation of Dihydroxybenzene Isomers 低成本电化学传感器用于同时检测和估计二羟基苯异构体

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2022-01-01 DOI: 10.4152/pea.2022400105

N. T. Tonu, M. A. Yousuf

{"title":"Low Cost Electrochemical Sensor for Simultaneous Detection and Estimation of Dihydroxybenzene Isomers","authors":"N. T. Tonu, M. A. Yousuf","doi":"10.4152/pea.2022400105","DOIUrl":"https://doi.org/10.4152/pea.2022400105","url":null,"abstract":"An ionic liquid (IL) based pencil graphite electrode (PGE) sensor was electrochemically fabricated for hydroquinone (HQ), catechol (CC) and resorcinol (RS) simultaneous detection and estimation in aqueous media. PGE surface was modified by 1-hexylpyridinium hexafluorophosphate (HPHP) using cyclic voltammetry (CV). The modified surface was characterized by scanning electron microscope (SEM) and energy dispersive X-ray microanalysis (EDX). The modified electrode showed an excellent electro-analytical activity towards simultaneously HQ, CC and RS, at pH 6.8 in aqueous media. The scan rate effect was diffusion controlled and the concentration effect was linear with current. The limit of detection (LOD) for HQ, CC and RS was found to be 6.38 μmol L¹, 4.56 μmol L¹ and 19.6 μmol L¹, respectively. The sensitivity for HQ, CC and RS was found to be 448.49 μAmM -1 cm -2 , 627.35 μAmM -1 cm -2 and 146.10 μAmM −1 cm −2 , respectively, in a ternary mixture of dihydroxybenzene isomers (DHBIs). The cost of using PGE was lower than that of the conventional electrodes. isomers, ionic liquid, pencil graphite electrode and differential pulse voltammetry.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70920080","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

Screening of Two Sulphur-Containing Schiff’s Bases Corrosion Inhibition Properties on CS: Gravimetric, Electrochemical and Quantum Chemical Studies CS上两种含硫希夫碱缓蚀性能的筛选:重量、电化学和量子化学研究

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2022-01-01 DOI: 10.4152/pea.2022400401

J. Reeja, K. Thomas, K. Ragi, M. P. Binsi

{"title":"Screening of Two Sulphur-Containing Schiff’s Bases Corrosion Inhibition Properties on CS: Gravimetric, Electrochemical and Quantum Chemical Studies","authors":"J. Reeja, K. Thomas, K. Ragi, M. P. Binsi","doi":"10.4152/pea.2022400401","DOIUrl":"https://doi.org/10.4152/pea.2022400401","url":null,"abstract":"Novel sulphur (S)-containing Schiff’s bases, N-((1H-indol-3-yl)methylene)thiazol-2-amine (I3A2AT) and(13E)-N1,N2-bis((thiophene-2-yl)methylene) cyclohexane-1,2-diamine (T2CDACH), were synthesized. The structures were deep-rooted by mass, UV-visible, Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) analyses. The ligands inhibition efficiency (  w%) on carbon steel (CS) corrosion in 1 M hydrochloric acid ( HCl) was studied using gravimetric analysis, electrochemical impedance spectroscopy (EIS), potentiodynamic polarisation (PDP), electrochemical noise (ECN), quantum chemical and surface studies. Both Schiff’s bases acted as excellent inhibitors on CS corrosion in 1 M HCl. The excellent inhibitors performance was confirmed by the formation of protective adsorption films onto the CS surface. The inhibitors adsorption onto the CS surface followed Langmuir’s adsorption isotherm. Energies of the highest and lowest occupied molecular orbitals (E HOMO and E LUMO) , number of electrons transferred (∆N), electronegativity, chemical hardness, and so forth, were evaluated by quantum chemical studies. An acceptable correlation was observed between the results of quantum chemical calculations and other corrosion monitoring techniques. corrosion inhibitors.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70920627","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

Garlic Extract as an Environmentally Corrosion Inhibitor of API X60 Carbon Steel and 316L Stainless Steel in Sulphuric Acid 大蒜提取物作为API X60碳钢和316L不锈钢在硫酸中的环境缓蚀剂

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2022-01-01 DOI: 10.4152/pea.2022400403

S. Belkaid, S. Hamdani, D. Mansour

引用次数: 2

The Role of Computational Chemistry in Corrosion Inhibition: a Review 计算化学在缓蚀中的作用综述

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2022-01-01 DOI: 10.4152/pea.2022400402

F. Abeng, B. Nyong, M. E. Ikpi, M. E. Obeten

{"title":"The Role of Computational Chemistry in Corrosion Inhibition: a Review","authors":"F. Abeng, B. Nyong, M. E. Ikpi, M. E. Obeten","doi":"10.4152/pea.2022400402","DOIUrl":"https://doi.org/10.4152/pea.2022400402","url":null,"abstract":"Metals and alloys corrosion is one of the most challenging and damaging occurrence that is linked with enormous economic and safety losses, and it becomes more severe during some manufacturing processes by which metallic surfaces are treated for other industrial application processes. The use of corrosion inhibitors is one of the best way to protect metals and alloys against damage. The problem of the environmental toxicity of some of the employed inhibitors and the high cost involved in controlling and preventing corrosion have prompted this review. Computational chemistry methods are mostly significant in reducing the cost of protecting metals and alloys against corrosion. This review article begins with the summary of the most used computational methods, parameters and, finally, summarizes the results of some studies made by different authors in the field of corrosion science and engineering. 5-sulfamethoxazoleazo-3-phenyl-2-thioxo-4-thiazolidinone), as corrosion inhibitors for MS in an acidic medium, using DFT at the B3LYP/6-31G (d, p) and B3LYP/6-311G (d, p) basis set levels. Ab initio calculations using the HF/6-31G (d, p) and HF/6-311G (d, p) methods for quantum chemical parameters/descriptors, namely, E HOMO , E LUMO , ΔE, μ, A, I, X, η,  , polarizability (α), Mulliken charges and fraction of electrons transferred (ΔN) from the inhibitors to Fe, were calculated and correlated with the experimental IE%. Quantitative structure activity relationship (QSAR) approach and a composite index of some quantum chemical parameters/descriptors were also considered to characterize the studied molecules IE. The results showed that the IE% of the studied rhodanine azosulfa drugs was closely related to their theoretical IE%, but with varying degrees of the correlation coefficient (R 2 ). The IE% also increased in E HOMO and decreased in E HOMO -E LUMO , and the areas containing N and S atoms were the most possible sites for bonding to the Fe surface, by donating the lone pair electrons to its empty d-orbital.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70920686","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: 5

Electrochemical Degradation of Ethyleneamines Contained in Galvanic Baths on a BDD Electrode 电镀液中乙胺在BDD电极上的电化学降解

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2022-01-01 DOI: 10.4152/pea.2022400303

M. Socha, J. Rynkowski

{"title":"Electrochemical Degradation of Ethyleneamines Contained in Galvanic Baths on a BDD Electrode","authors":"M. Socha, J. Rynkowski","doi":"10.4152/pea.2022400303","DOIUrl":"https://doi.org/10.4152/pea.2022400303","url":null,"abstract":"Ethylenediamine (EDA), diethylenetriamine (DETA) and N,N,N',N'-tetrakis (2-hydroxypropyl) ethylenediamine (THPrED) are used relatively often in galvanic processes. Tetra-substituted derivatives, such as N, N, N ', N'-tetrakis (2-hydroxyethyl) ethylenediamine, (THEtED) are quite biologically stable and hardly degradable. In recent years, much attention has been devoted to electrochemical oxidation, using anodes with a high over-potential of O2 evolution, such as the boron-doped diamond (BDD). DETA and THPrED electrochemical treatment using a BDD anode was herein studied. The degradation efficiency of the amines was evaluated under different current intensities and reaction times. To determine the products formed in the oxidation process, ion chromatography (IC) was used. A high decrease in the current between the first and the second CV scan indicated the polymer film formation on the BDD electrode surface. Hydroxyl radicals formed at a potential of about 2 V and higher caused further oxidation of the electrode reaction products. It was found that NH4, CH3-COOH, N2, EDA, CO2 and NO3were formed in a short reaction time, and at low current intensity. The mineralization occurred during substrates electrolysis, due to rapid DETA and THPrED decomposition. After 180 min of reaction, αTOC and αN values for DETA were 94% and 18%, respectively. For THPrED, αTOC was 98.6% and αN was 43.6%. Therefore, the electrochemical approach was considered a very promising method in practical application for the treatment of wastewater containing amines.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70920827","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

Atmospheric Corrosion in the Tropics: The Costa Rican Central Valley Case 热带地区的大气腐蚀:哥斯达黎加中央山谷案例

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2022-01-01 DOI: 10.4152/pea.2022400602

J. Rodríguez-Yáñez, R. Brenes-Brenes, R. Jimenez-Salas, M. Abdalah-Hernández, J. Sanabria-Chinchilla

引用次数: 0

Electrochemical Behavior Study of Sodium Saccharin in an Aqueous Electrolyte Solution by a Nano-sensor, Using Cyclic Voltammetric Technique 基于循环伏安法的纳米传感器研究糖精钠在水溶液中的电化学行为

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2021-01-01 DOI: 10.4152/pea.202102071

M. Radhi, Y. K. A. Amir, A. Ibrahim

引用次数: 2

Thermal and Anti-Corrosive Properties of Titanium Dioxide/Epoxy Resin Composite Coating for Steel Preservation in a Marine-Environment 海洋环境下钢防腐用二氧化钛/环氧树脂复合涂层的耐热性和防腐性能

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2021-01-01 DOI: 10.4152/pea.2021390303

O. Dagdag, A. El-Harfi, A. EL-BACHIRI, S. Jodeh

引用次数: 2

A New Synthesized Schiff Base as Corrosion Inhibitor for Mild Steel in a HCl Medium: Experimental, Density Functional Theory and Molecular Dynamics Simulation Studies 一种新型合成希夫碱作为低碳钢在盐酸介质中的缓蚀剂:实验、密度泛函理论和分子动力学模拟研究

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2021-01-01 DOI: 10.4152/pea.2021390504

I. Kaabi, T. Douadi, D. Daoud, S. Amamra, S. Chafaa

{"title":"A New Synthesized Schiff Base as Corrosion Inhibitor for Mild Steel in a HCl Medium: Experimental, Density Functional Theory and Molecular Dynamics Simulation Studies","authors":"I. Kaabi, T. Douadi, D. Daoud, S. Amamra, S. Chafaa","doi":"10.4152/pea.2021390504","DOIUrl":"https://doi.org/10.4152/pea.2021390504","url":null,"abstract":"A new inhibitor Schiff base ether ligand, L, di[(4-phenylamino)2,4-dihydroxy salicylaldehyde], was synthesized and characterized using mass spectra, elemental analysis, IR spectra, UV-Vis spectra, H NMR spectroscopy and thermal analysis. Electrochemical properties were investigated using cyclic Voltammetry (CV). The corrosion inhibition effect of the new prepared Schiff base was examined on mild steel (X48) in a 1 M HCl solution, by using gravimetric and electrochemical measurements. The potentiodynamic polarization results showed that the investigated Schiff base acted as a mixed kind inhibitor (cathodic/anodic), with some cathodic predominance. The adsorption procedure on X48 surface obeyed Langmuir isotherm. The associated adsorption activation factors and thermodynamic parameters were evaluated and interpreted. The inhibitor layer formed on the metal surface was characterized by AFM and SEM. The solid-state molecular geometry has been studied with the theoretical data obtained by density functional theory (DFT). Furthermore, the interaction between the inhibitor and Fe (1 1 0) surface was achieved by molecular dynamics simulations.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70919182","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: 6