The copper-rich zone plays a key role in understanding the deterioration process of 2024 aluminium alloy. The intermetallic on the surfaces makes this alloy susceptible to both local corrosion and microbial colonization. The adhesion of bacteria on the surface could deteriorate the metallic substrate in a phenomenon known as microbiologically influenced corrosion (MIC). The triggering mechanism of MIC in 2024-T3 is unclear. An electrochemical study was conducted to determine the influence of the second phase (Al2Cu) on the corrosion of the 2024-T3 aluminium alloy exposed to bacteria. The 2024-T3 alloy was thermally treated to increase the amount of Al2Cu by nearly 67 % on the surface. The bacterium under study was collected from the corrosion products of a Chilean Air Force aircraft. The isolated bacterium was identified by 16S RNA sequencing as Bacillus mojavensis (99.99 %). Results obtained by electrochemical impedance spectroscopy showed a decreased impedance of 2024-T3 and an increased impedance of heat-treated, both samples exposed to bacteria. The increased impedance could be associated with the antibacterial effect due to the high ion release of copper on the surface, which can inhibit biofilm formation and biocorrosion.
{"title":"Electrochemical behaviour of thermally treated aluminium 2024 alloy exposed to B. mojavensis","authors":"N. Vejar, Joseph Rozas, R. Solís","doi":"10.5599/jese.2139","DOIUrl":"https://doi.org/10.5599/jese.2139","url":null,"abstract":"The copper-rich zone plays a key role in understanding the deterioration process of 2024 aluminium alloy. The intermetallic on the surfaces makes this alloy susceptible to both local corrosion and microbial colonization. The adhesion of bacteria on the surface could deteriorate the metallic substrate in a phenomenon known as microbiologically influenced corrosion (MIC). The triggering mechanism of MIC in 2024-T3 is unclear. An electrochemical study was conducted to determine the influence of the second phase (Al2Cu) on the corrosion of the 2024-T3 aluminium alloy exposed to bacteria. The 2024-T3 alloy was thermally treated to increase the amount of Al2Cu by nearly 67 % on the surface. The bacterium under study was collected from the corrosion products of a Chilean Air Force aircraft. The isolated bacterium was identified by 16S RNA sequencing as Bacillus mojavensis (99.99 %). Results obtained by electrochemical impedance spectroscopy showed a decreased impedance of 2024-T3 and an increased impedance of heat-treated, both samples exposed to bacteria. The increased impedance could be associated with the antibacterial effect due to the high ion release of copper on the surface, which can inhibit biofilm formation and biocorrosion.","PeriodicalId":14819,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"423 2‐3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140246950","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}
The yttria-stabilized zirconia (YSZ) - Inconel 625 (IN625) composite cladding was deposited on a stainless steel substrate using a tungsten inert gas welding manipulator to protect it from solid particle erosion. Erosion wear tests were carried out at room temperature according to the ASTM G76-18 procedure. The surface of the tested material was exposed to a jet of alumina erodent particles at impact angles of 30 and 90°, respectively. Scanning electron microscopy images were utilized to examine the morphologies of the eroded surface and the microstructure of cladding. The erosive performance of YSZ - IN625 composite cladding was 3.5 and 2.4 times compared to the substrate at different impact angles. Improved microhardness and fracture toughness resulting from the favourable interaction between the hard ceramic YSZ particles and the IN625 matrix led to the enhanced erosion performance of composite cladding. Micro-cutting and ploughing were the predominant wear mechanisms in the substrate during the solid particle erosion test at a 30° impact angle, whereas the indentation-induced plastic deformation was dominant at a 90° impact angle. The results also revealed that the micro-cutting, detached splats and fissures were responsible for the wear in composite cladding at 30 and 90° impact angles.
{"title":"The solid particle erosion performance of tungsten inert gas yttria-stabilized zirconia - Inconel 625 composite cladding","authors":"N. Kamboj, Lalit Thakur Thakur, Manpreet K. Arora","doi":"10.5599/jese.2140","DOIUrl":"https://doi.org/10.5599/jese.2140","url":null,"abstract":"The yttria-stabilized zirconia (YSZ) - Inconel 625 (IN625) composite cladding was deposited on a stainless steel substrate using a tungsten inert gas welding manipulator to protect it from solid particle erosion. Erosion wear tests were carried out at room temperature according to the ASTM G76-18 procedure. The surface of the tested material was exposed to a jet of alumina erodent particles at impact angles of 30 and 90°, respectively. Scanning electron microscopy images were utilized to examine the morphologies of the eroded surface and the microstructure of cladding. The erosive performance of YSZ - IN625 composite cladding was 3.5 and 2.4 times compared to the substrate at different impact angles. Improved microhardness and fracture toughness resulting from the favourable interaction between the hard ceramic YSZ particles and the IN625 matrix led to the enhanced erosion performance of composite cladding. Micro-cutting and ploughing were the predominant wear mechanisms in the substrate during the solid particle erosion test at a 30° impact angle, whereas the indentation-induced plastic deformation was dominant at a 90° impact angle. The results also revealed that the micro-cutting, detached splats and fissures were responsible for the wear in composite cladding at 30 and 90° impact angles.","PeriodicalId":14819,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"141 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140265406","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}
In this investigation, the powder metallurgy process was used to fabricate porous structures of Ti6Al4V alloy by adding space holder powder particles. The samples were fabricated with varying levels of compaction pressure and other process parameters were kept unchanged in order to investigate the variation in electrochemical behaviour. It was observed that a lower level of compaction pressure resulted in an increase in corrosion current density and rate and a decrease in polarisation resistance. The sample's inability to achieve passivity against electrochemical corrosion, when fabricated using a lower level of compaction pressure, was linked to a higher number of interconnecting micropores. The results of the microstructure analysis confirmed the significant densification of the powder particles when higher compaction pressure was used. The study recommends that a compaction pressure of 300 MPa or higher may be used for fabricating porous structures for biomedical applications.
{"title":"Electrochemical behaviour of Ti6Al4V porous structures fabricated by powder metallurgy route","authors":"Maninder Singh, Amoljit Singh Gill, P. K. Deol","doi":"10.5599/jese.2135","DOIUrl":"https://doi.org/10.5599/jese.2135","url":null,"abstract":"In this investigation, the powder metallurgy process was used to fabricate porous structures of Ti6Al4V alloy by adding space holder powder particles. The samples were fabricated with varying levels of compaction pressure and other process parameters were kept unchanged in order to investigate the variation in electrochemical behaviour. It was observed that a lower level of compaction pressure resulted in an increase in corrosion current density and rate and a decrease in polarisation resistance. The sample's inability to achieve passivity against electrochemical corrosion, when fabricated using a lower level of compaction pressure, was linked to a higher number of interconnecting micropores. The results of the microstructure analysis confirmed the significant densification of the powder particles when higher compaction pressure was used. The study recommends that a compaction pressure of 300 MPa or higher may be used for fabricating porous structures for biomedical applications.","PeriodicalId":14819,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"98 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140445415","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}
Arafat Toghan, Hanen Alhussain, Azza Attia, O.K. Alduaij, A. Fawzy, A. M. Eldesoky, Ahmed A Farag
In this report, N-benzylhydrazinecarbothioamide (BHCTA) was investigated as an organic inhibitor for the corrosion of copper substrate in 3.5 wt.% sodium chloride electrolyte at 298 K. The inhibition efficiency of BHCTA was examined using electrochemical, chemical and theoretical tools. The gained outcomes indicated a supreme inhibition efficiency of BHCTA which exceeded 95 % upon addition of 1.00 mM of BHCTA. Such supreme efficiency was discussed on the basis of decisive adsorption of BHCTA molecules on the copper substrate that hinders concurrently the anodic oxidation and cathodic reduction reactions progressions. The adsorption of BHCTA on the copper surface was discovered to obey Langmuir isotherm. The resulting value of DGads0 = −35.7 kJ mol−1 indicates that BHCTA molecules adsorb on the copper surface through a spontaneous mix of physisorption and chemisorption processes. A scanning electron microscope was used to examine the effect of BHCTA adsorption on the morphology of the copper surface. Theoretical calculations showed that BHCTA has good adsorption properties on Cu substrate. There is a good consistency between the applied experimental and theoretical tools, confirming the validity of the gained outcomes.
{"title":"Corrosion inhibition performance of copper using N-benzylhy-drazinecarbothioamide in a 3.5 % NaCl solution","authors":"Arafat Toghan, Hanen Alhussain, Azza Attia, O.K. Alduaij, A. Fawzy, A. M. Eldesoky, Ahmed A Farag","doi":"10.5599/jese.2181","DOIUrl":"https://doi.org/10.5599/jese.2181","url":null,"abstract":"In this report, N-benzylhydrazinecarbothioamide (BHCTA) was investigated as an organic inhibitor for the corrosion of copper substrate in 3.5 wt.% sodium chloride electrolyte at 298 K. The inhibition efficiency of BHCTA was examined using electrochemical, chemical and theoretical tools. The gained outcomes indicated a supreme inhibition efficiency of BHCTA which exceeded 95 % upon addition of 1.00 mM of BHCTA. Such supreme efficiency was discussed on the basis of decisive adsorption of BHCTA molecules on the copper substrate that hinders concurrently the anodic oxidation and cathodic reduction reactions progressions. The adsorption of BHCTA on the copper surface was discovered to obey Langmuir isotherm. The resulting value of DGads0 = −35.7 kJ mol−1 indicates that BHCTA molecules adsorb on the copper surface through a spontaneous mix of physisorption and chemisorption processes. A scanning electron microscope was used to examine the effect of BHCTA adsorption on the morphology of the copper surface. Theoretical calculations showed that BHCTA has good adsorption properties on Cu substrate. There is a good consistency between the applied experimental and theoretical tools, confirming the validity of the gained outcomes.","PeriodicalId":14819,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140451940","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}
Modelling of proton exchange membrane fuel cell (PEMFC) is important for better understanding, simulation, and design of high-efficiency fuel cell systems. PEMFC models are often multivariate with several nonlinear elements. Metaheuristic algorithms that are successful in solving nonlinear optimization problems are good candidates for this purpose. This study proposes a new metaheuristic algorithm called MFORS that uses the advantages of the moth-flame optimization algorithm in global search and the non-deterministic properties of the random search algorithm to identify the optimal parameters of the PEMFC model. The sum of squared errors between the estimated and measured voltage is a quality of fit criterion. To show the effectiveness of the proposed algorithm, two case studies of zero-dimensional models of SR-12 Modular PEM Generator and Ballard Mark V fuel cell are considered. The sum of squared errors for the parameter estimated of electrical PEMFCs by the proposed MFORS algorithm is compared with recent works. The results showed that by the MFORS algorithm, the minimum sum of absolute errors of the actual stack voltage and the simulated stack voltage in the two PEMFC are 0.095037 and 0.018019, compared with the second-best algorithm results giving 0.09681 and 0.8092, respectively.
{"title":"Moth flame-random search optimization of a zero-dimensional model of a proton exchange membrane fuel cell","authors":"Ali Maroosi, Amir Mohammadbeigi","doi":"10.5599/jese.1991","DOIUrl":"https://doi.org/10.5599/jese.1991","url":null,"abstract":"Modelling of proton exchange membrane fuel cell (PEMFC) is important for better understanding, simulation, and design of high-efficiency fuel cell systems. PEMFC models are often multivariate with several nonlinear elements. Metaheuristic algorithms that are successful in solving nonlinear optimization problems are good candidates for this purpose. This study proposes a new metaheuristic algorithm called MFORS that uses the advantages of the moth-flame optimization algorithm in global search and the non-deterministic properties of the random search algorithm to identify the optimal parameters of the PEMFC model. The sum of squared errors between the estimated and measured voltage is a quality of fit criterion. To show the effectiveness of the proposed algorithm, two case studies of zero-dimensional models of SR-12 Modular PEM Generator and Ballard Mark V fuel cell are considered. The sum of squared errors for the parameter estimated of electrical PEMFCs by the proposed MFORS algorithm is compared with recent works. The results showed that by the MFORS algorithm, the minimum sum of absolute errors of the actual stack voltage and the simulated stack voltage in the two PEMFC are 0.095037 and 0.018019, compared with the second-best algorithm results giving 0.09681 and 0.8092, respectively.","PeriodicalId":14819,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"47 51","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139961257","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}
Helena Otmačić Ćurković, Angela Kapitanović, Martina Filipović, Petra Gorišek
Waterborne coatings present a green alternative to solvent-borne coatings as only a small amount of organic solvent is released into the environment during drying. However, for waterborne coatings, the drying process is much more challenging due to the slow evaporation of water. In this work, the influence of drying temperature on the protective properties of a waterborne acrylic coating was studied. Its performance in corrosion protection of bronze substrates, representing the bronzes used for the sculptures placed outdoors, was examined. Corrosion properties were evaluated by linear polarization measurements and electrochemical impedance spectroscopy during three-week exposure to artificial acid rain solution. It was found that drying at ambient temperature resulted in modest corrosion protection, while drying at 55 °C ensured greater initial corrosion resistance, which gradually degraded during exposure to acid rain solution accompanied by the coating blistering. Drying of one-layer coating at 40 °C resulted in the formation of clearly visible corrosion products. If the coating was applied in three layers, the drying process was more efficient, leading to slightly higher polarization resistance values without visible corrosion at the bronze surface. Furthermore, the studied waterborne acrylic coating provided good corrosion protection of patinated bronze surfaces. Additionally, it was found that for efficient corrosion protection, it is preferable that the coating contains a corrosion inhibitor in order to avoid substrate corrosion during coating drying. When applied properly, studied coating does not alter the state of surfaces, both bare and patinated, which is important for its application in bronze cultural heritage protection.
水性涂料是溶剂型涂料的绿色替代品，因为在干燥过程中只有少量有机溶剂释放到环境中。然而，由于水的蒸发速度较慢，水性涂料的干燥过程更具挑战性。在这项工作中，研究了干燥温度对水性丙烯酸涂料保护性能的影响。研究考察了水性丙烯酸涂层在青铜基底（代表用于室外雕塑的青铜）腐蚀保护方面的性能。在人工酸雨溶液中暴露三周后，通过线性极化测量和电化学阻抗光谱法对腐蚀特性进行了评估。结果发现，在环境温度下干燥能提供适度的腐蚀保护，而在 55 °C 下干燥能确保更高的初始耐腐蚀性，但在暴露于酸雨溶液期间，耐腐蚀性会逐渐降低，同时涂层会起泡。单层涂层在 40 °C 下干燥会形成明显可见的腐蚀产物。如果涂层分为三层，干燥过程会更有效，从而使青铜表面的极化电阻值略有提高，但不会出现明显的腐蚀。此外，所研究的水性丙烯酸涂层还能为青铜表面提供良好的腐蚀保护。此外，研究还发现，为了提供有效的防腐保护，涂料中最好含有缓蚀剂，以避免涂层干燥过程中基材受到腐蚀。如果使用得当，所研究的涂层不会改变表面的状态，无论是裸露的还是斑驳的，这对其在青铜文化遗产保护中的应用非常重要。
{"title":"effect of coating drying conditions on bronze corrosion protection","authors":"Helena Otmačić Ćurković, Angela Kapitanović, Martina Filipović, Petra Gorišek","doi":"10.5599/jese.2228","DOIUrl":"https://doi.org/10.5599/jese.2228","url":null,"abstract":"Waterborne coatings present a green alternative to solvent-borne coatings as only a small amount of organic solvent is released into the environment during drying. However, for waterborne coatings, the drying process is much more challenging due to the slow evaporation of water. In this work, the influence of drying temperature on the protective properties of a waterborne acrylic coating was studied. Its performance in corrosion protection of bronze substrates, representing the bronzes used for the sculptures placed outdoors, was examined. Corrosion properties were evaluated by linear polarization measurements and electrochemical impedance spectroscopy during three-week exposure to artificial acid rain solution. It was found that drying at ambient temperature resulted in modest corrosion protection, while drying at 55 °C ensured greater initial corrosion resistance, which gradually degraded during exposure to acid rain solution accompanied by the coating blistering. Drying of one-layer coating at 40 °C resulted in the formation of clearly visible corrosion products. If the coating was applied in three layers, the drying process was more efficient, leading to slightly higher polarization resistance values without visible corrosion at the bronze surface. Furthermore, the studied waterborne acrylic coating provided good corrosion protection of patinated bronze surfaces. Additionally, it was found that for efficient corrosion protection, it is preferable that the coating contains a corrosion inhibitor in order to avoid substrate corrosion during coating drying. When applied properly, studied coating does not alter the state of surfaces, both bare and patinated, which is important for its application in bronze cultural heritage protection.","PeriodicalId":14819,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"59 45","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139844634","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}
Helena Otmačić Ćurković, Angela Kapitanović, Martina Filipović, Petra Gorišek
Waterborne coatings present a green alternative to solvent-borne coatings as only a small amount of organic solvent is released into the environment during drying. However, for waterborne coatings, the drying process is much more challenging due to the slow evaporation of water. In this work, the influence of drying temperature on the protective properties of a waterborne acrylic coating was studied. Its performance in corrosion protection of bronze substrates, representing the bronzes used for the sculptures placed outdoors, was examined. Corrosion properties were evaluated by linear polarization measurements and electrochemical impedance spectroscopy during three-week exposure to artificial acid rain solution. It was found that drying at ambient temperature resulted in modest corrosion protection, while drying at 55 °C ensured greater initial corrosion resistance, which gradually degraded during exposure to acid rain solution accompanied by the coating blistering. Drying of one-layer coating at 40 °C resulted in the formation of clearly visible corrosion products. If the coating was applied in three layers, the drying process was more efficient, leading to slightly higher polarization resistance values without visible corrosion at the bronze surface. Furthermore, the studied waterborne acrylic coating provided good corrosion protection of patinated bronze surfaces. Additionally, it was found that for efficient corrosion protection, it is preferable that the coating contains a corrosion inhibitor in order to avoid substrate corrosion during coating drying. When applied properly, studied coating does not alter the state of surfaces, both bare and patinated, which is important for its application in bronze cultural heritage protection.
水性涂料是溶剂型涂料的绿色替代品，因为在干燥过程中只有少量有机溶剂释放到环境中。然而，由于水的蒸发速度较慢，水性涂料的干燥过程更具挑战性。在这项工作中，研究了干燥温度对水性丙烯酸涂料保护性能的影响。研究考察了水性丙烯酸涂层在青铜基底（代表用于室外雕塑的青铜）腐蚀保护方面的性能。在人工酸雨溶液中暴露三周后，通过线性极化测量和电化学阻抗光谱法对腐蚀特性进行了评估。结果发现，在环境温度下干燥能提供适度的腐蚀保护，而在 55 °C 下干燥能确保更高的初始耐腐蚀性，但在暴露于酸雨溶液期间，耐腐蚀性会逐渐降低，同时涂层会起泡。单层涂层在 40 °C 下干燥会形成明显可见的腐蚀产物。如果涂层分为三层，干燥过程会更有效，从而使青铜表面的极化电阻值略有提高，但不会出现明显的腐蚀。此外，所研究的水性丙烯酸涂层还能为青铜表面提供良好的腐蚀保护。此外，研究还发现，为了提供有效的防腐保护，涂料中最好含有缓蚀剂，以避免涂层干燥过程中基材受到腐蚀。如果使用得当，所研究的涂层不会改变表面的状态，无论是裸露的还是斑驳的，这对其在青铜文化遗产保护中的应用非常重要。
{"title":"effect of coating drying conditions on bronze corrosion protection","authors":"Helena Otmačić Ćurković, Angela Kapitanović, Martina Filipović, Petra Gorišek","doi":"10.5599/jese.2228","DOIUrl":"https://doi.org/10.5599/jese.2228","url":null,"abstract":"Waterborne coatings present a green alternative to solvent-borne coatings as only a small amount of organic solvent is released into the environment during drying. However, for waterborne coatings, the drying process is much more challenging due to the slow evaporation of water. In this work, the influence of drying temperature on the protective properties of a waterborne acrylic coating was studied. Its performance in corrosion protection of bronze substrates, representing the bronzes used for the sculptures placed outdoors, was examined. Corrosion properties were evaluated by linear polarization measurements and electrochemical impedance spectroscopy during three-week exposure to artificial acid rain solution. It was found that drying at ambient temperature resulted in modest corrosion protection, while drying at 55 °C ensured greater initial corrosion resistance, which gradually degraded during exposure to acid rain solution accompanied by the coating blistering. Drying of one-layer coating at 40 °C resulted in the formation of clearly visible corrosion products. If the coating was applied in three layers, the drying process was more efficient, leading to slightly higher polarization resistance values without visible corrosion at the bronze surface. Furthermore, the studied waterborne acrylic coating provided good corrosion protection of patinated bronze surfaces. Additionally, it was found that for efficient corrosion protection, it is preferable that the coating contains a corrosion inhibitor in order to avoid substrate corrosion during coating drying. When applied properly, studied coating does not alter the state of surfaces, both bare and patinated, which is important for its application in bronze cultural heritage protection.","PeriodicalId":14819,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"80 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139784520","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}
In this study, two different metal-organic frameworks (MOFs) were synthesized using copper and cobalt metal ions with benzenedicarboxylic acid (bdc) as a common ligand. The prepared MOFs were characterized using X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy-energy dispersive spectroscopy. Also, the electrochemical characteristics were analyzed using cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy methods. Structural characterizations indicate that Co-bdc MOF is composed of three-dimensional non-uniform colloids and Cu-bdc MOF has a regular three-dimensional cuboidal structure, possessing good crystalline structure. The Cu-bdc MOF exhibited a maximum specific capacitance of 171 F/g, while Co-bdc MOF showed 368 F/g at the current density of 1 A/g. The solution resistance for the Co-bdc MOF was 0.09 Ω in comparison to 1.25 Ω for the Cu-bdc MOF. Also, the Co-bdc MOF demonstrated better cycling performance by retaining 85 % of its capacity after 2000 charge-discharge cycles. In contrast, the stability of the Cu-bdc MOF was lower, with only 78 % retention in capacity. Conclusively, the Co-bdc MOF demonstrated superior specific capacitance, lower resistance, and enhanced cyclic stability in 3 M KOH electrolyte system.
{"title":"Cobalt and copper-based metal-organic frameworks synthesis and their supercapacitor application","authors":"Sneha Tomar, Vinod Kumar Singh","doi":"10.5599/jese.2096","DOIUrl":"https://doi.org/10.5599/jese.2096","url":null,"abstract":"In this study, two different metal-organic frameworks (MOFs) were synthesized using copper and cobalt metal ions with benzenedicarboxylic acid (bdc) as a common ligand. The prepared MOFs were characterized using X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy-energy dispersive spectroscopy. Also, the electrochemical characteristics were analyzed using cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy methods. Structural characterizations indicate that Co-bdc MOF is composed of three-dimensional non-uniform colloids and Cu-bdc MOF has a regular three-dimensional cuboidal structure, possessing good crystalline structure. The Cu-bdc MOF exhibited a maximum specific capacitance of 171 F/g, while Co-bdc MOF showed 368 F/g at the current density of 1 A/g. The solution resistance for the Co-bdc MOF was 0.09 Ω in comparison to 1.25 Ω for the Cu-bdc MOF. Also, the Co-bdc MOF demonstrated better cycling performance by retaining 85 % of its capacity after 2000 charge-discharge cycles. In contrast, the stability of the Cu-bdc MOF was lower, with only 78 % retention in capacity. Conclusively, the Co-bdc MOF demonstrated superior specific capacitance, lower resistance, and enhanced cyclic stability in 3 M KOH electrolyte system.","PeriodicalId":14819,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"122 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139785682","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}
In this study, two different metal-organic frameworks (MOFs) were synthesized using copper and cobalt metal ions with benzenedicarboxylic acid (bdc) as a common ligand. The prepared MOFs were characterized using X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy-energy dispersive spectroscopy. Also, the electrochemical characteristics were analyzed using cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy methods. Structural characterizations indicate that Co-bdc MOF is composed of three-dimensional non-uniform colloids and Cu-bdc MOF has a regular three-dimensional cuboidal structure, possessing good crystalline structure. The Cu-bdc MOF exhibited a maximum specific capacitance of 171 F/g, while Co-bdc MOF showed 368 F/g at the current density of 1 A/g. The solution resistance for the Co-bdc MOF was 0.09 Ω in comparison to 1.25 Ω for the Cu-bdc MOF. Also, the Co-bdc MOF demonstrated better cycling performance by retaining 85 % of its capacity after 2000 charge-discharge cycles. In contrast, the stability of the Cu-bdc MOF was lower, with only 78 % retention in capacity. Conclusively, the Co-bdc MOF demonstrated superior specific capacitance, lower resistance, and enhanced cyclic stability in 3 M KOH electrolyte system.
{"title":"Cobalt and copper-based metal-organic frameworks synthesis and their supercapacitor application","authors":"Sneha Tomar, Vinod Kumar Singh","doi":"10.5599/jese.2096","DOIUrl":"https://doi.org/10.5599/jese.2096","url":null,"abstract":"In this study, two different metal-organic frameworks (MOFs) were synthesized using copper and cobalt metal ions with benzenedicarboxylic acid (bdc) as a common ligand. The prepared MOFs were characterized using X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy-energy dispersive spectroscopy. Also, the electrochemical characteristics were analyzed using cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy methods. Structural characterizations indicate that Co-bdc MOF is composed of three-dimensional non-uniform colloids and Cu-bdc MOF has a regular three-dimensional cuboidal structure, possessing good crystalline structure. The Cu-bdc MOF exhibited a maximum specific capacitance of 171 F/g, while Co-bdc MOF showed 368 F/g at the current density of 1 A/g. The solution resistance for the Co-bdc MOF was 0.09 Ω in comparison to 1.25 Ω for the Cu-bdc MOF. Also, the Co-bdc MOF demonstrated better cycling performance by retaining 85 % of its capacity after 2000 charge-discharge cycles. In contrast, the stability of the Cu-bdc MOF was lower, with only 78 % retention in capacity. Conclusively, the Co-bdc MOF demonstrated superior specific capacitance, lower resistance, and enhanced cyclic stability in 3 M KOH electrolyte system.","PeriodicalId":14819,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"103 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139845462","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}
In the rapidly evolving landscape of electroanalysis, the role of nanomaterials has emerged as a transformative force, propelling the field to the upper stages. This special issue delves into the groundbreaking contributions of nanomaterials, exploring their potential as catalysts and their impact on shaping the future of electroanalytical techniques.
{"title":"Nanomaterials as the powerful catalysts in electroanalysis","authors":"C. Karaman, Fatemeh Karimi, O. Karaman","doi":"10.5599/jese.2263","DOIUrl":"https://doi.org/10.5599/jese.2263","url":null,"abstract":"In the rapidly evolving landscape of electroanalysis, the role of nanomaterials has emerged as a transformative force, propelling the field to the upper stages. This special issue delves into the groundbreaking contributions of nanomaterials, exploring their potential as catalysts and their impact on shaping the future of electroanalytical techniques.","PeriodicalId":14819,"journal":{"name":"Journal of Electrochemical Science and Engineering","volume":"161 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139859355","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}
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