Portugaliae Electrochimica Acta最新文献_第2页

A Novel Leaf Extract of Sorghum Vulgare as an Eco-friendly Corrosion Inhibitor for Mild Steel Corrosion in 0.5 M H2SO4 高粱叶提取物在0.5 M H2SO4中对低碳钢的环保型缓蚀剂研究

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2023-01-01 DOI: 10.4152/pea.2023410402

S. Sharma, M. Sharma, N. Dheer, al et

引用次数: 1

Corrosion Inhibitive Potentials of Some N-Alkyl Benzimidazoles and their Corresponding Ionic Liquids on a Mild Steel Surface: Experimental and Theoretical Approach 几种n -烷基苯并咪唑及其相应离子液体在低碳钢表面的缓蚀电位:实验与理论研究

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2023-01-01 DOI: 10.4152/pea.2023410504

U. B. Suleiman, U. Yunusa, A. Muhammad, al et

{"title":"Corrosion Inhibitive Potentials of Some N-Alkyl Benzimidazoles and their Corresponding Ionic Liquids on a Mild Steel Surface: Experimental and Theoretical Approach","authors":"U. B. Suleiman, U. Yunusa, A. Muhammad, al et","doi":"10.4152/pea.2023410504","DOIUrl":"https://doi.org/10.4152/pea.2023410504","url":null,"abstract":"U2 and U4 were successfully synthesized from C 7 H 6 N 2 N-alkylation (general and useful route to quaternary ammonium salts NH4Cl from tertiary amines) with alkyl bromides. The products were further alkylated to the corresponding ILs: U5 and U7. All the synthesized compounds were characterized by spectroscopic techniques, and their compositions were established through elemental analysis. The synthesized compounds were investigated as inhibitors for MS corrosion, using 1 M HCl as a model solution. WL experiments, surface analysis, quantum chemical calculations and MD simulation methods were used for evaluating the inhibitors anticorrosion properties. The results showed that ILs possessed remarkable inhibition properties under the studied conditions. U5 displayed the highest IE of 95.22%, at 200 ppm. ILs corrosion IE(%) was ascribed to their adsorption onto the MS surfaces, which followed the Langmuir’s isotherm. SEM revealed the formation of a barrier film by the inhibitors on the MS surface. Finally, the experimental results were corroborated by theoretical quantum chemical calculations and MD simulation studies. The studied inhibitor molecules interaction energies with the Fe surface followed the order U5 > U7 > U2 > U4, which is consistent with the experimental data.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70922533","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

Optimization and Performance Evaluation of Lemon Leaves Extract as Inhibitor for Mild Steel Corrosion in a 1.0 M HCl Solution 柠檬叶提取物在1.0 M HCl溶液中对低碳钢缓蚀剂的优化及性能评价

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2023-01-01 DOI: 10.4152/pea.2023410602

O. Oyewole, J. Adeoye, A. Tunbosun, al et

引用次数: 0

Anodic Treatment of Ni-Cu Alloy in a Deep Eutectic Solvent to Improve Electrocatalytic Activity in the Hydrogen Evolution Reaction Ni-Cu合金在深共晶溶剂中阳极处理以提高析氢反应的电催化活性

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2023-01-01 DOI: 10.4152/pea.2023400603

V. Protsenko, T. Butyrina, D. Makhota, Al Et

{"title":"Anodic Treatment of Ni-Cu Alloy in a Deep Eutectic Solvent to Improve Electrocatalytic Activity in the Hydrogen Evolution Reaction","authors":"V. Protsenko, T. Butyrina, D. Makhota, Al Et","doi":"10.4152/pea.2023400603","DOIUrl":"https://doi.org/10.4152/pea.2023400603","url":null,"abstract":"DESs, as new-generation room temperature ILs, are very promising to perform anodic processing of different metals and alloys. We report Ni-Cu alloy (45 wt.% Ni) anodic treatment in a DES, ethaline, for the first time. It is shown that the anodic dissolution originated the formation of sparingly soluble Ni and Cu chloride salts in the near-electrode layer. Ni-Cu alloy anodic treatment in ethaline resulted in changed patterns of the metallic surface morphology. Depending on the applied electrode E, star like crystallites, with sharply pointed shapes and thorns, may appear on the anodically etched surface, and surface morphology smoothing was observed, in some cases. The Ni-Cu alloy anodic processing in ethaline, which dramatically changed its surface morphology, contributed to a considerable increase in the electrocatalytic activity towards HER in an alkaline medium. Considering favorable environmental aspects of DES use and marked improvement in electrocatalytic properties, this treatment can be further used to develop high-efficient, eco-friendly and relatively inexpensive electrocatalysts methods for water electrolysis within H 2 energy concept.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70921200","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

Wastewater Electrolysis for Hydrogen Production 废水电解制氢

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2023-01-01 DOI: 10.4152/pea.2023410105

M. Cartaxo, J. Fernandes, M. Gomes, al et

引用次数: 0

Ziziphus Spina Christi Leaves Methanol Extract Evaluation as Antifungal, Antibacterial, Antioxidant and Green Inhibitor for Carbon Steel Alloy Corrosion in Hydrochloric Acid 酸枣叶甲醇提取物在盐酸中抗真菌、抗菌、抗氧化和碳钢合金缓蚀剂的评价

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2023-01-01 DOI: 10.4152/pea.2023410205

S. Z. Al-Ashoor, D. S. Ali, H. Al-Sawaad

{"title":"Ziziphus Spina Christi Leaves Methanol Extract Evaluation as Antifungal, Antibacterial, Antioxidant and Green Inhibitor for Carbon Steel Alloy Corrosion in Hydrochloric Acid","authors":"S. Z. Al-Ashoor, D. S. Ali, H. Al-Sawaad","doi":"10.4152/pea.2023410205","DOIUrl":"https://doi.org/10.4152/pea.2023410205","url":null,"abstract":"In this study, Zs-c leaves were extracted by a 70% CH 3 OH solvent. The extract was investigated as green corrosion inhibitor for CS C1010 alloy in 0.1 M HCl. The study was done with different inhibitor concentrations (1, 2, 8 and 9 ppm). The extract showed the highest IE of 96.06%, at 9 ppm. The inhibitor adsorption on the CS alloy surface was found to obey the Langmuir’s adsorption isotherm model. K ads , ΔH ads , ΔS ads and ΔG ads were also calculated. The temperature effect on Zs-c leaves extract IE%, with the optimal concentration of 9 ppm, was studied at 35,45 and 55 ºC. The results showed that IE% decreased with raising solution temperatures. In addition, 𝐸 (cid:3028)∗ , ΔH, ΔS and ΔG kinetic parameters were calculated. On the other hand, phytochemical tests and quantitative analysis, such as TPC and TFC, were also carried out. In addition, the anti-bacterial activity or growth inhibition of bacterial strains, such as Ec and Sa, were studied. Anti-fungal activity or growth inhibition studies of Ca and An species were also carried out, at a 100 mg/mL concentration. Anti-oxidant activity was also investigated by DPPH, at concentrations of 100, 250, 500, 750 and 1000 µg/mL, and good results were obtained.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70921941","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

Performance of Glasses Containing Titan as Potential Corrosion Inhibitors for Mild Steel in a 3% NaCl Solution 含泰坦玻璃在3% NaCl溶液中作为低碳钢潜在缓蚀剂的性能

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2023-01-01 DOI: 10.4152/pea.2023410503

A. Shaim, M. Galai, K. Ba, al et

引用次数: 0

Performance of Quinoxalinone Derivatives as a Potential Efficient Inhibitor of Ordinary Steel Corrosion in 1 M Hydrochloric Acid: DFT Calculations 喹啉酮衍生物在1 M盐酸中作为普通钢腐蚀的潜在高效缓蚀剂的性能:DFT计算

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2023-01-01 DOI: 10.4152/pea.2023410604

A. Benallal, M. Galai, F. Benhiba, al et

引用次数: 0

Investigation of Ziziphus Lotus Leaves Extract Corrosion Inhibitory Impact on Carbon Steel in a Molar Hydrochloric Acid Solution 酸枣荷叶提取物在盐酸溶液中对碳钢的缓蚀作用研究

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2023-01-01 DOI: 10.4152/pea.2023410203

S. Lahmady, O. Anor, I. Forsal, al et

引用次数: 0

Recovery of Strategic Metals from Tungsten Carbide-Cobalt Bonded Waste by Electrochemical Processing 电化学处理从碳化钨-钴结合废物中回收战略金属

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2023-01-01 DOI: 10.4152/pea.2023410202

P. Katiyar, N. Randhawa

{"title":"Recovery of Strategic Metals from Tungsten Carbide-Cobalt Bonded Waste by Electrochemical Processing","authors":"P. Katiyar, N. Randhawa","doi":"10.4152/pea.2023410202","DOIUrl":"https://doi.org/10.4152/pea.2023410202","url":null,"abstract":"Scraped or end-of-life WC-Co bonded makes it an attractive resource. The conventional technologies to recover these metals entail energy-intensive pre-treatment steps, followed by their dissolution in a high volume of concentrated acids/alkali reagents. Recently, much attention has been given to the development of energy-efficient and environmentally friendly routes based on WC-Co direct electrochemical dissolution as anodes. However, the metals have a retarded dissolution, in NaOH alkali media, due to the formation of passive oxide layers, in the acidic electrolytes, and of hydroxides, on the anodic surface. The present study investigated WC and Co dissolution fundamentals in aqueous NH 3 , in order to develop a greener process, by the suitable addition of (NH 4 ) 2 CO 3 , (NH 4 ) 2 SO 4 and NH 4 Cl Preliminary PDP studies revealed the necessary concentration of NH 3 and additives, and their effect on the metals passivation tendency, for obtaining the best anodic dissolution parameters. The electrodissolution experiments in a specially designed cell achieved the maximum values, by adjusting those parameters. The highest dissolution of W and Co occurred under optimum conditions (10 V, 150 g/L NH 3 and 15% w/v NH 4 Cl). Co was deposited at the cathode, while H 8 N 2 O 4 W remained in the electrolyte and was recovered as H 2 WO 4 or YTO . Topographical analysis of the polarized surface by AFM has confirmed the pitting corrosion mechanism responsible for W and Co dissolution. A process flow chart for the newly developed single-step direct recycling methods of WC scraps has also been proposed. This process has produced pure saleable WO 3 powder and Co.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70921447","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