International Journal of Electrochemical Science最新文献

{"title":"Enhancing corrosion resistance of Q355B steel in marine environments using graphene doped inorganic zinc-rich coatings","authors":"Junhua Liu ,&nbsp;Ying Wu ,&nbsp;Fengwei Yan ,&nbsp;Yu Yan ,&nbsp;Fei Wang ,&nbsp;Guangchao Zhang ,&nbsp;Ling Zeng ,&nbsp;Yin Ma ,&nbsp;Jiahao Guo ,&nbsp;Yuchun Li","doi":"10.1016/j.ijoes.2024.100872","DOIUrl":"10.1016/j.ijoes.2024.100872","url":null,"abstract":"<div><div>Prolonged exposure of Q355B steel to the marine environment renders it susceptible to corrosion from seawater salt spray. In this study, inorganic zinc-rich coatings incorporating different components of graphene and calcium carbonate as anti-corrosion strategy were designed and aimed to improving their corrosion resistance. The anti-corrosion performance of these coating on Q355B was evaluated using scanning electron microscopy (SEM), X-ray diffraction (XRD), Potentiodynamic polarization tests and electrochemical impedance spectroscopy. Results indicated that the coating of 2G-1.5CaCO₃-ZRC exhibited a corrosion current density of 1.565 × 10⁻⁵A cm⁻² and an impedance value of 734.6 Ω after immersion in simulated seawater solution for seven days. Compared with the untreated coating, this formulation demonstrated reduced corrosion current density and increased impedance values, indicating that the incorporation of graphene and calcium carbonate effectively mitigated corrosion rates while prolonging the materials protection duration. This work delivers the potential application in the field of protection for metal structures in seaport areas.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 12","pages":"Article 100872"},"PeriodicalIF":1.3,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of electrochemical fingerprints for Buzhong Yiqi Tang extract granules using diamond-graphene composite electrode","authors":"Ying Wang,&nbsp;Wei He","doi":"10.1016/j.ijoes.2024.100849","DOIUrl":"10.1016/j.ijoes.2024.100849","url":null,"abstract":"<div><div>This study presents a novel electrochemical fingerprinting method for Buzhong Yiqi Tang extract granules using a diamond-graphene composite electrode. The electrode was fabricated through chemical vapor deposition of graphene on high-pressure high-temperature synthetic diamond, resulting in a few-layer graphene coating as confirmed by Raman spectroscopy (I₂_D/I_G ratio ≈ 1.2) and XPS analysis (78 % sp² C-C signal). Cyclic voltammetry revealed four anodic and three cathodic peaks, while differential pulse voltammetry provided enhanced resolution with eight distinct oxidation peaks. The method demonstrated high sensitivity (LODs 0.08–0.15 mg/mL) and good linearity (R² &gt; 0.995) over a concentration range of 0.5–10 mg/mL. Comparison of fingerprints from individual herb extracts (Astragalus membranaceus, Panax ginseng, and Glycyrrhiza uralensis) elucidated the origins of major peaks in the Buzhong Yiqi Tang profile. Principal component analysis of fingerprints successfully differentiated between samples from three manufacturers, accounting for 87.3 % of total variance. Strong correlations (r &gt; 0.92) were observed between key DPV peak intensities and HPLC-determined concentrations of traditional chemical markers. The rapid analysis time, minimal sample preparation, and holistic representation of multiple electroactive components make this approach a promising complement to existing chromatographic methods for quality assessment of traditional Chinese medicine formulations.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 12","pages":"Article 100849"},"PeriodicalIF":1.3,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic inhibition effect of thioureido imidazoline and cationic surfactants with different alkyl chain lengths on X80 carbon steel in CO2-saturated NaCl solutions","authors":"Guobin Yang ,&nbsp;Huaiyan Qi ,&nbsp;Xueying Wu ,&nbsp;An Liu ,&nbsp;Shaohua Zhang ,&nbsp;Jintao Zhang","doi":"10.1016/j.ijoes.2024.100869","DOIUrl":"10.1016/j.ijoes.2024.100869","url":null,"abstract":"<div><div>The corrosion inhibition performance of the thioureido imidazoline (TU-IM) corrosion inhibitor, along with three surfactants, was assessed for X80 carbon steels in a CO₂-saturated NaCl solution using weight loss tests, electrochemical and microstructural characterization. Results demonstrate that the corrosion-inhibition efficiency of surfactants improves with increasing alkyl-chain length in the following order: cetyltrimethylammonium bromide (CTAB) &gt; tetradecyltrimethylammonium bromide (TTAB) &gt; dodecyltrimethylammonium bromide (DTAB). A synergistic corrosion inhibition effect between TU-IM and DTAB/TTAB was observed, with the best performance achieved using 10 mg/L TU-IM and 10 mg/L DTAB/TTAB (inhibition efficiency: 97.68 %), which is mainly attributed to the cooperative adsorption of both substances. By contrast, the synergistic inhibition capability of TU-IM with the surfactants decreased as the alkyl-chain length increased, and even an antagonistic effect was noted for the combination of TU-IM + CTAB owing to the competitive adsorption between the surfactant and the corrosion inhibitor.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 12","pages":"Article 100869"},"PeriodicalIF":1.3,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the influence characteristics of multi-working condition parameters on membrane electrode type CO2 electrolyzer","authors":"Xianwen Zhang ,&nbsp;Hao Peng ,&nbsp;Feiyue Cao ,&nbsp;Yaoyi Cao ,&nbsp;Qingxin Liu ,&nbsp;Chizhou Tang ,&nbsp;Taotao Zhou","doi":"10.1016/j.ijoes.2024.100870","DOIUrl":"10.1016/j.ijoes.2024.100870","url":null,"abstract":"<div><div>The electrochemical conversion of carbon dioxide (CO₂) into basic chemicals or carbon-based fuels is a promising new strategy for carbon resource utilization. Within this domain, solid-electrolyte CO₂ electrolyzer demonstrate significant potential for the continuous production of pure formic acid solutions. This study, leveraging a 4 cm² visualization electrolyzer, explores the impact of three working condition parameters on performance: working voltage, gas flow rate, and the intermediate chamber water flow rate. It compares the variations in current density, formic acid concentration, and the distribution of liquid water on the cathode side under different working conditions. The results indicate that the working voltage, current density, and formic acid yield are all positively correlated; overly low gas flow rates can lead to CO₂ deficiency and diminished electrolyzer performance; concentration control of the formic acid solution is effectively achieved by adjusting the intermediate chamber water flow rate; and during the electrolyzer reaction process, almost all of the liquid water is positioned at the bends downstream of the cathode flow channel.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 12","pages":"Article 100870"},"PeriodicalIF":1.3,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced mechanism of AO7 degradation by electrochemical activation of persulfate at carbon felt and electrogenerated H2O2 carbon black-modified cathodes in divided cell","authors":"Jingju Cai ,&nbsp;Qingrong Xie ,&nbsp;Ziyi Ding ,&nbsp;Jingxiao Cao ,&nbsp;Jiahao Liu ,&nbsp;Jing Xia ,&nbsp;Jixiang Yang","doi":"10.1016/j.ijoes.2024.100861","DOIUrl":"10.1016/j.ijoes.2024.100861","url":null,"abstract":"<div><div>Electrochemical activation of persulfate (EA-PS) is gradually drawing attention owing to its low energy consumption, environmental friendliness and good recycling performance. In this paper, carbon felt (CF) and carbon black modified carbon felt were (CB-CF) employed as cathodes in divided cell to degrade acid orange 7 (AO7), respectively. Different experimental parameters were discussed, including initial AO7 concentration, initial pH, current density and PS concentration. AO7 degradation in EA-PS process is followed the order of CB-CF&gt;CF, owing to the <em>in situ</em> H₂O₂ generation at CB-CF cathode. The AO7 degradation mechanism was explored in the presence of Cl^-, PO₄^3-, HCO₃^- and HA. Quenching experiment and EPR results revealed that AO7 degradation was the comprehensive effect of ^•OH, SO₄^•- and DET in CB-CF system, while in CF system it was the comprehensive effect of ^•OH, SO₄^•-, ¹O₂ and DET. This work provides a feasible strategy for EA-PS process that producing H₂O₂ <em>in suit</em> for organic contaminants degradation.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 12","pages":"Article 100861"},"PeriodicalIF":1.3,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical interaction behaviors between adjacent zinc-rich coating defects on steel structures under immersion and wet–dry environments","authors":"Jian Tang ,&nbsp;Muye Yang ,&nbsp;Shigenobu Kainuma ,&nbsp;Ryo Inoue","doi":"10.1016/j.ijoes.2024.100860","DOIUrl":"10.1016/j.ijoes.2024.100860","url":null,"abstract":"<div><div>This study investigates the corrosion mechanism of carbon steel beneath zinc-rich coating (ZRC) defects to understand the mutual interference of carbon steel in atmospheric environments. First, electrochemical impedance spectroscopy (EIS) was conducted to determine the self-corrosion behavior of carbon steel under ZRC defects. Subsequently, a macrocell current tests were conducted under immersion and wet–dry environments to evaluate the electrochemical interaction effects at the location of coating defects. The results indicate that the electrochemical interactions between the ZRC defects are influenced by the sacrificial anode effect of Zn. Further, the interaction mechanisms between the steel substrates beneath the organic and inorganic ZRC defects were analyzed. The findings provide deeper insight into the behavior of steel structures in atmospheric environments, offering potential improvements in the design of protective coatings for infrastructure longevity.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 12","pages":"Article 100860"},"PeriodicalIF":1.3,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical and theoretical evaluation of loratadine as corrosion inhibitor for X65 steel in 1M HCl aqueous solution","authors":"J.A. Ramírez-Cano ,&nbsp;A. Espinoza-Vázquez ,&nbsp;A. Miralrio ,&nbsp;A. Carmona-Hernandez ,&nbsp;R. Galván-Martínez ,&nbsp;M. Castro ,&nbsp;R. Orozco-Cruz","doi":"10.1016/j.ijoes.2024.100843","DOIUrl":"10.1016/j.ijoes.2024.100843","url":null,"abstract":"<div><div>Currently oil industry infrastructure, mainly fabricated in carbon steel alloys, is exposed to aggressive environments due to the use of acid solutions during cleaning and maintenance operations, the search for eco friendly, economic and efficient protection alternatives is an active field of research in corrosion science. In this work the use of loratadine (<span><math><mrow><msub><mrow><mi>C</mi></mrow><mrow><mn>22</mn></mrow></msub><msub><mrow><mi>H</mi></mrow><mrow><mn>23</mn></mrow></msub><msub><mrow><mi>ClN</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>) as corrosion inhibitor for X65 steel in acidic media at room temperature is studied by means of electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP). Surface analysis was carried out using scanning electronic microscopy (SEM) and energy dispersive spectroscopy (EDS). Theoretical calculations (density functional theory, DFT) were used to elucidate the interaction between loratadine and an iron cluster model. Inhibitor efficiency increases with concentration reaching a maximum value of 93.69% according to PDP and 85.21% according to EIS. Thermodynamic analysis revealed that free energy of adsorption (<span><math><mrow><mi>Δ</mi><msub><mrow><mi>G</mi></mrow><mrow><mi>a</mi><mi>d</mi><mi>s</mi></mrow></msub><mo>=</mo><mo>−</mo><mn>39</mn><mo>.</mo><mn>41</mn></mrow></math></span> kJ/mol) corresponds to a mixed adsorption process. Furthermore, the seven membered ring, pyridine and chlorophenyl groups were determined as the preferential active sites. Additionally, electrostatic interactions due to the transference from metal atoms to the organic molecules explains the physical interaction.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 12","pages":"Article 100843"},"PeriodicalIF":1.3,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chemical composition, biological activities, and anti-corrosion performance of Moroccan essential oil Thymus vulgaris from the Oued Amlil region, Taza","authors":"N. Chahboun ,&nbsp;A. Barrahi ,&nbsp;L. Koursaoui ,&nbsp;S. Mortada ,&nbsp;K. Fahsi ,&nbsp;R. Flouchi ,&nbsp;K. Karrouchi ,&nbsp;M.E.A. Faouzi ,&nbsp;M. El Faydy ,&nbsp;Hatem A. Abuelizz ,&nbsp;Abhinay Thakur ,&nbsp;K. Fikri-Benbrahim ,&nbsp;A. Zarrouk","doi":"10.1016/j.ijoes.2024.100859","DOIUrl":"10.1016/j.ijoes.2024.100859","url":null,"abstract":"<div><div>The study investigated the antibacterial, antioxidant, antidiabetic, ADMET (absorption-distribution-metabolism-excretion-toxicity) properties, and anticorrosion of essential oil extracted from <em>Thymus vulgaris collected</em> in the Oued Amlil region of Taza. The phytochemical profile of the <em>Thymus vulgaris</em> essential oil via gas chromatography-mass spectrometry (GC-MS) technique identified non-oxygenated monoterpenes (19.07 %), oxygenated monoterpenes (77.61 %), non-oxygenated sesquiterpenes (1.44 %), and oxygenated sesquiterpenes (1.88 %). The main constituents were carvacrol (59.70 %), thymol (16.5 %), and γ-terpinene (11.11 %). The in vitro microdilution antibacterial effect test showed significant activity against all tested bacteria, except for some Gram-negative bacteria (Pseudomonas, Pantoae spp.), which showed resistance. <em>Thymus vulgaris</em> oil also showed antioxidant activity, with IC₅₀ values of 5.94±0.22 µg/mL using 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging assay and 3.03±0.17 (µg/mL) using 2,2′-azino-bis-3-ethylbenzthiazoline-6-sulfonic acid (ABTS) assay. The tested oil revealed good inhibitory activity on α-amylase and α-glucosidase with IC₅₀ values of 0.92±0.02 mg/mL and 0.19±0.01 mg/mL, respectively. The ADME study of the identified phytoconstituents of <em>Thymus vulgaris</em> essential oil confirms their important pharmacokinetic and drug-like properties. Additionally, the inhibitory effect of <em>Thymus vulgaris</em> essential oil on carbon steel corrosion was evaluated using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques. The surface morphology of the uninhibited and inhibited carbon steel coupons was analyzed using scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS). Electrochemical studies showed that <em>Thymus vulgaris</em> oil acts as a good mixed corrosion inhibitor for carbon steel substrate in one molar of hydrochloric acid (1 M HCl) since an inhibition efficiency of 94.4 % was reached with 400 ppm at 303 K.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 12","pages":"Article 100859"},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Front Matter1:Full Title Page","authors":"","doi":"10.1016/S1452-3981(24)00406-1","DOIUrl":"10.1016/S1452-3981(24)00406-1","url":null,"abstract":"","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 11","pages":"Article 100864"},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance constraints of high temperature polymer electrolyte membrane fuel cells by varying the Pt/C ratio of the catalyst","authors":"Santiago Martin,&nbsp;Pedro L. Garcia-Ybarra,&nbsp;Jose L. Castillo","doi":"10.1016/j.ijoes.2024.100857","DOIUrl":"10.1016/j.ijoes.2024.100857","url":null,"abstract":"<div><div>Electrodes prepared from catalysts with Pt weight percentages on the carbon support (Pt/C nanoparticles) ranging from 10 up to 60 wt% are used as cathodes of membrane electrode assemblies (MEAs) and tested in high temperature polymer electrolyte membrane fuel cells (HT-PEMFCs). For each Pt/C percentage in the catalyst, the cathode Pt-loading (which become proportional to the thickness of the electrode formed by the catalyst nanoparticles) is stepwise scanned from low to high loadings. Results show that when the Pt load increases, the MEA performance (measured by its power density at 0.6 V) rises initially (due to the increase in the number of active sites in the cathode) up to a maximum value limited by the mass transport of oxygen, associated to an optimum Pt-loading (different for each Pt/C ratio). Noteworthy, the peak performance is significantly different depending on the catalyst used (60 &gt; 40 &gt;&gt; 20 &gt; 10 wt% Pt/C), a fact that restricts the catalyst choice according to the performance required by the application. Furthermore, higher amounts of Pt in the cathode lead to a large catalyst waste as the FC performance even decreases as the cathode thickness increases.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 12","pages":"Article 100857"},"PeriodicalIF":1.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}