Pub Date : 2024-05-15DOI: 10.1007/s40243-024-00262-x
Michael Lubwama, Agatha Birungi, Andrew Nuwamanya, Vianney Andrew Yiga
{"title":"Characteristics of rice husk biochar briquettes with municipal solid waste cassava, sweet potato and matooke peelings as binders","authors":"Michael Lubwama, Agatha Birungi, Andrew Nuwamanya, Vianney Andrew Yiga","doi":"10.1007/s40243-024-00262-x","DOIUrl":"https://doi.org/10.1007/s40243-024-00262-x","url":null,"abstract":"","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140973285","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}
Pub Date : 2024-05-14DOI: 10.1007/s40243-024-00258-7
Charles Lois I. Flores, Gaurav Gupta, Mohamed Mamlouk, Mary Donnabelle L. Balela
Hierarchical hollow urchin-like nickel cobaltite (NiCo2O4) was synthesized using a two-step hydrothermal method. The effects of metal composition and surfactant addition on the morphology, structure, and electrochemical performance toward oxygen evolution reaction (OER) were investigated. The addition of cetyltrimethylammonium bromide (CTAB) reduced particle aggregation, resulting in a higher electrochemical active surface area and electrical conductivity. Lowering the Ni content from 1.0 to 0.25 did not alter the morphology and structure of the product to any extent. However, the crystallite size slightly increased. Among the spinels with different Ni and Co compositions, NiCo2O4 exhibited a superior OER electrocatalytic activity, achieving a 380 mV overpotential at 10 mA/cm2 current density. It also delivered a good performance in an anion exchange membrane water electrolyzer (AEMWE) using 1 M NaOH at 60 °C, reaching a current density of about 420 mA/cm2 at a cell voltage of 1.95 V.
采用两步水热法合成了分层空心海胆状钴酸镍(NiCo2O4)。研究了金属成分和表面活性剂的添加对其形貌、结构和氧进化反应(OER)电化学性能的影响。十六烷基三甲基溴化铵(CTAB)的加入减少了颗粒的聚集,从而提高了电化学活性表面积和电导率。将镍含量从 1.0 降低到 0.25 并没有在任何程度上改变产品的形态和结构。不过,结晶尺寸略有增加。在不同镍和钴成分的尖晶石中,NiCo2O4 表现出更高的 OER 电催化活性,在 10 mA/cm2 电流密度下,过电位达到 380 mV。它还在使用 1 M NaOH、温度为 60 °C 的阴离子交换膜水电解槽(AEMWE)中表现出良好的性能,在电池电压为 1.95 V 时,电流密度达到约 420 mA/cm2。
{"title":"Enhancing the physicochemical properties of nickel cobaltite catalyst for oxygen evolution reaction in anion exchange membrane water electrolyzers","authors":"Charles Lois I. Flores, Gaurav Gupta, Mohamed Mamlouk, Mary Donnabelle L. Balela","doi":"10.1007/s40243-024-00258-7","DOIUrl":"https://doi.org/10.1007/s40243-024-00258-7","url":null,"abstract":"<p>Hierarchical hollow urchin-like nickel cobaltite (NiCo<sub>2</sub>O<sub>4</sub>) was synthesized using a two-step hydrothermal method. The effects of metal composition and surfactant addition on the morphology, structure, and electrochemical performance toward oxygen evolution reaction (OER) were investigated. The addition of cetyltrimethylammonium bromide (CTAB) reduced particle aggregation, resulting in a higher electrochemical active surface area and electrical conductivity. Lowering the Ni content from 1.0 to 0.25 did not alter the morphology and structure of the product to any extent. However, the crystallite size slightly increased. Among the spinels with different Ni and Co compositions, NiCo<sub>2</sub>O<sub>4</sub> exhibited a superior OER electrocatalytic activity, achieving a 380 mV overpotential at 10 mA/cm<sup>2</sup> current density. It also delivered a good performance in an anion exchange membrane water electrolyzer (AEMWE) using 1 M NaOH at 60 °C, reaching a current density of about 420 mA/cm<sup>2</sup> at a cell voltage of 1.95 V.</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930310","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}
Pub Date : 2024-05-14DOI: 10.1007/s40243-024-00261-y
Abbas Fadhil Khalaf, Farhan Lafta Rashid, Mudhar A. Al-Obaidi, Arman Ameen, Hayder I. Mohammed
Designing more effective thermal energy storage devices can result from understanding how air layers impact the melting process. The total efficiency of these systems can be improved by optimizing the melting process of the phase change materials (PCMs), which are utilised to store and release thermal energy. The current study utilises an analysis to evaluate how an air layer would affect melting of the PCM. The enthalpy-porosity combination based ANSYS/FLUENT 16 software is specifically used to accomplish this study, considering the paraffin wax (RT42) as the PCM. The study reveal that the presence of an air layer would impact the dissolution process. This result is assured an increase of melting time of PCM by 125% as a result to having an air layer of 5 cm thickness compared to a cell without an air layer. Furthermore, an increase of the layer thickness beyond 5 cm has a progressive effect on the melting time of PCM. One important component that affects the melting process is the existence of an air layer above the cell. Greater heat transfer resistance from thicker air layers prolongs the time needed to finish melting. The efficient heat transmission of PCM is shown to be reduced when there is an air layer above the cell. The melting process gradually slows down as the air layer thickness rises, which reflects the decreased heat transmission. These results highlight how crucial it is to take the environment into account while creating PCM-filled energy storage cells.
{"title":"Numerical investigation of the effect of an air layer on the melting process of phase change materials","authors":"Abbas Fadhil Khalaf, Farhan Lafta Rashid, Mudhar A. Al-Obaidi, Arman Ameen, Hayder I. Mohammed","doi":"10.1007/s40243-024-00261-y","DOIUrl":"https://doi.org/10.1007/s40243-024-00261-y","url":null,"abstract":"<p>Designing more effective thermal energy storage devices can result from understanding how air layers impact the melting process. The total efficiency of these systems can be improved by optimizing the melting process of the phase change materials (PCMs), which are utilised to store and release thermal energy. The current study utilises an analysis to evaluate how an air layer would affect melting of the PCM. The enthalpy-porosity combination based ANSYS/FLUENT 16 software is specifically used to accomplish this study, considering the paraffin wax (RT42) as the PCM. The study reveal that the presence of an air layer would impact the dissolution process. This result is assured an increase of melting time of PCM by 125% as a result to having an air layer of 5 cm thickness compared to a cell without an air layer. Furthermore, an increase of the layer thickness beyond 5 cm has a progressive effect on the melting time of PCM. One important component that affects the melting process is the existence of an air layer above the cell. Greater heat transfer resistance from thicker air layers prolongs the time needed to finish melting. The efficient heat transmission of PCM is shown to be reduced when there is an air layer above the cell. The melting process gradually slows down as the air layer thickness rises, which reflects the decreased heat transmission. These results highlight how crucial it is to take the environment into account while creating PCM-filled energy storage cells.</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930028","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}
Pub Date : 2024-05-14DOI: 10.1007/s40243-024-00263-w
Sabrina C. Zignani, Antonino S. Aricò
As a result of electrochemical conversion of carbon dioxide (CO2), value-added chemicals like as synthetic fuels and chemical feedstocks can be produced. In the current state of the art, copper-based materials are most widely used being the most effective catalysts for this reaction. It is still necessary to improve the reaction rate and product selectivity of CuOx for electrochemical CO2 reduction reaction (CO2RR). The main objective of this work was synthesized and evaluate the copper oxide electrocatalyst combined with silver (CuO 70% Ag 30%) for the conversion of carbon dioxide into synthetic fuels. The catalysts have been prepared by the oxalate method and assessed in a flow cell system. The results of electrochemical experiments were carried out at room temperature and at different potentials (-1.05 V–0.75 V vs. RHE in presence of 0.1 M KHCO3) and gas and liquid chromatographic analysis are summarized. The CuOx-based electrodes demonstrated the selective of ~ 25% at -0.55 V for formic acid (HCOOH) and over CuO -Ag and selective of ethylene at ~ 20% over CuOx at -1.05 V. Other products were formed as ethylene, ethanol, and propanol (C2H4, EtOH, PrOH) at more positive potentials. On the other hand, carbon monoxide, acetate, ethylene glycol, propinaldehyde, glycoaldehyde and glyoxal (CO, CH3COO, C2H6O2, C3H6O, C2H4O2, C2H2O2) have been formed and detected. Based on the results of these studies, it appears that the formation of synthetic fuels from CO2 at room temperature in alkaline environment can be very promising.
通过对二氧化碳(CO2)进行电化学转化,可以生产出高附加值的化学品,如合成燃料和化学原料。目前,铜基材料作为该反应最有效的催化剂得到了最广泛的应用。但仍有必要提高 CuOx 在电化学二氧化碳还原反应(CO2RR)中的反应速率和产物选择性。这项工作的主要目的是合成和评估氧化铜与银(CuO 70% Ag 30%)结合的电催化剂,用于将二氧化碳转化为合成燃料。催化剂采用草酸盐法制备,并在流动池系统中进行了评估。电化学实验在室温和不同电位(-1.05 V-0.75 V vs. RHE,存在 0.1 M KHCO3)下进行,并总结了气相和液相色谱分析结果。结果表明,在-0.55 V电压下,CuOx电极对甲酸(HCOOH)的选择性比 CuO -Ag 高约 25%;在-1.05 V电压下,CuOx电极对乙烯的选择性比 CuOx 高约 20%。在更高的正电位下,会形成乙烯、乙醇和丙醇(C2H4、EtOH、PrOH)等其他产物。另一方面,一氧化碳、醋酸、乙二醇、丙醛、甘醛和乙二醛(CO、CH3COO、C2H6O2、C3H6O、C2H4O2、C2H2O2)也已形成并被检测到。根据这些研究结果,在碱性环境中室温下利用二氧化碳形成合成燃料似乎很有前景。
{"title":"CO2 conversion to synthetic fuels using flow cell reactor over Cu and Ag based cathodes","authors":"Sabrina C. Zignani, Antonino S. Aricò","doi":"10.1007/s40243-024-00263-w","DOIUrl":"https://doi.org/10.1007/s40243-024-00263-w","url":null,"abstract":"<p>As a result of electrochemical conversion of carbon dioxide (CO<sub>2</sub>), value-added chemicals like as synthetic fuels and chemical feedstocks can be produced. In the current state of the art, copper-based materials are most widely used being the most effective catalysts for this reaction. It is still necessary to improve the reaction rate and product selectivity of CuOx for electrochemical CO<sub>2</sub> reduction reaction (CO<sub>2</sub>RR). The main objective of this work was synthesized and evaluate the copper oxide electrocatalyst combined with silver (CuO 70% Ag 30%) for the conversion of carbon dioxide into synthetic fuels. The catalysts have been prepared by the oxalate method and assessed in a flow cell system. The results of electrochemical experiments were carried out at room temperature and at different potentials (-1.05 V–0.75 V vs. RHE in presence of 0.1 M KHCO<sub>3</sub>) and gas and liquid chromatographic analysis are summarized. The CuOx-based electrodes demonstrated the selective of ~ 25% at -0.55 V for formic acid (HCOOH) and over CuO -Ag and selective of ethylene at ~ 20% over CuOx at -1.05 V. Other products were formed as ethylene, ethanol, and propanol (C<sub>2</sub>H<sub>4</sub>, EtOH, PrOH) at more positive potentials. On the other hand, carbon monoxide, acetate, ethylene glycol, propinaldehyde, glycoaldehyde and glyoxal (CO, CH<sub>3</sub>COO, C<sub>2</sub>H<sub>6</sub>O<sub>2</sub>, C<sub>3</sub>H<sub>6</sub>O, C<sub>2</sub>H<sub>4</sub>O<sub>2</sub>, C<sub>2</sub>H<sub>2</sub>O<sub>2</sub>) have been formed and detected. Based on the results of these studies, it appears that the formation of synthetic fuels from CO<sub>2</sub> at room temperature in alkaline environment can be very promising.</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930033","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}
Pub Date : 2024-05-09DOI: 10.1007/s40243-024-00259-6
Nour-eddine Lazar, Driss Mazkad, Hamza Kharti, Fatma Yalcinkaya, Andrea Pietrelli, Vincenzo Ferrara, Noureddine Touach, Abdellah Benzaouak, Mohammed El Mahi, El Mostapha Lotfi
Microbial fuel cells (MFCs) have attracted a great deal of attention as a promising technology for recovering electricity from organic substances by harnessing the metabolic activities of microorganisms. The objective of this study is to assess the efficacy of a LiTa0.5Nb0.5O3/g-C3N4 (LTN/g-C3N4) heterojunction as a photocathode catalyst within a single-chamber microbial fuel cell operating under both light irradiation and dark conditions. X-Ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and Energy dispersive X-Ray spectroscopy (EDS) were used to conduct a comprehensive analysis of the composite catalyst, revealing its exceptional purity and unique properties. After 120 h of exposure to visible light, the maximal power density of the MFC containing LTN/g-C3N4-modified carbon cloth was determined to be 667.7 mW/m3. The power density achieved with the presence of light was approximately three times greater than the power density obtained without light in the MFC (235.64 mW/m3). In addition, the study determined that the removal efficiencies of chemical oxygen demand (COD) were 88.4% and 66.5% when exposed to light and in the absence of light, respectively. These findings highlight the potential of the non-precious LTN/g-C3N4 photocatalyst as a viable alternative for effective wastewater treatment and power generation in microbial fuel cells with a single chamber configuration.
{"title":"Maximizing power generation in single-chamber microbial fuel cells: the role of LiTa0.5Nb0.5O3/g-C3N4 photocatalyst","authors":"Nour-eddine Lazar, Driss Mazkad, Hamza Kharti, Fatma Yalcinkaya, Andrea Pietrelli, Vincenzo Ferrara, Noureddine Touach, Abdellah Benzaouak, Mohammed El Mahi, El Mostapha Lotfi","doi":"10.1007/s40243-024-00259-6","DOIUrl":"https://doi.org/10.1007/s40243-024-00259-6","url":null,"abstract":"<p>Microbial fuel cells (MFCs) have attracted a great deal of attention as a promising technology for recovering electricity from organic substances by harnessing the metabolic activities of microorganisms. The objective of this study is to assess the efficacy of a LiTa<sub>0.5</sub>Nb<sub>0.5</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> (LTN/g-C<sub>3</sub>N<sub>4</sub>) heterojunction as a photocathode catalyst within a single-chamber microbial fuel cell operating under both light irradiation and dark conditions. X-Ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and Energy dispersive X-Ray spectroscopy (EDS) were used to conduct a comprehensive analysis of the composite catalyst, revealing its exceptional purity and unique properties. After 120 h of exposure to visible light, the maximal power density of the MFC containing LTN/g-C3N4-modified carbon cloth was determined to be 667.7 mW/m<sup>3</sup>. The power density achieved with the presence of light was approximately three times greater than the power density obtained without light in the MFC (235.64 mW/m<sup>3</sup>). In addition, the study determined that the removal efficiencies of chemical oxygen demand (COD) were 88.4% and 66.5% when exposed to light and in the absence of light, respectively. These findings highlight the potential of the non-precious LTN/g-C<sub>3</sub>N<sub>4</sub> photocatalyst as a viable alternative for effective wastewater treatment and power generation in microbial fuel cells with a single chamber configuration.</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930027","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}
Pub Date : 2024-04-25DOI: 10.1007/s40243-024-00260-z
A. Mortadi, E. El Hafidi, H. Nasrellah, M. Monkade, R. El moznine
{"title":"Analysis and optimization of lead-free perovskite solar cells: investigating performance and electrical characteristics","authors":"A. Mortadi, E. El Hafidi, H. Nasrellah, M. Monkade, R. El moznine","doi":"10.1007/s40243-024-00260-z","DOIUrl":"https://doi.org/10.1007/s40243-024-00260-z","url":null,"abstract":"","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140657248","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}
Pub Date : 2024-03-06DOI: 10.1007/s40243-023-00249-0
Abstract
Single lithium-ion conducting polymer electrolytes are promising candidates for next generation safer lithium batteries. In this work, Li+-conducting Nafion membranes have been synthesized by using a novel single-step procedure. The Li-Nafion membranes were characterized by means of small-wide angle X-ray scattering, infrared spectroscopy and thermal analysis, for validating the proposed lithiation method. The obtained membranes were swollen in different organic aprotic solvent mixtures and characterized in terms of ionic conductivity, electrochemical stability window, lithium stripping-deposition ability and their interface properties versus lithium metal. The membrane swollen in ethylene carbonate:propylene carbonate (EC:PC, 1:1 w/w) displays good temperature-activated ionic conductivities (σ ≈ 5.5 × 10–4 S cm−1 at 60 °C) and a more stable Li-electrolyte interface with respect to the other samples. This Li-Nafion membrane was tested in a lithium-metal cell adopting LiFePO4 as cathode material. A specific capacity of 140 mAhg−1, after 50 cycles, was achieved at 30 °C, demonstrating the feasibility of the proposed Li-Nafion membrane.
摘要 单一锂离子传导聚合物电解质是下一代更安全锂电池的理想候选材料。本研究采用新颖的单步法合成了锂离子传导 Nafion 膜。通过小广角 X 射线散射、红外光谱和热分析对锂-Nafion 膜进行了表征,以验证所提出的石化方法。将获得的膜在不同的有机烷基混合溶剂中溶胀,并从离子电导率、电化学稳定窗口、锂剥离沉积能力及其与锂金属的界面特性等方面对其进行表征。与其他样品相比,在碳酸乙烯酯:碳酸丙烯酯(EC:PC,1:1 w/w)中溶胀的膜显示出良好的温度激活离子电导率(σ ≈ 5.5 × 10-4 S cm-1,60 °C)和更稳定的锂电解质界面。在采用磷酸铁锂作为阴极材料的锂金属电池中测试了这种锂-负离子膜。在 30 °C 下循环 50 次后,比容量达到 140 mAhg-1,这证明了所建议的锂-萘非离子膜的可行性。
{"title":"Lithiated Nafion membrane as a single-ion conducting polymer electrolyte in lithium batteries","authors":"","doi":"10.1007/s40243-023-00249-0","DOIUrl":"https://doi.org/10.1007/s40243-023-00249-0","url":null,"abstract":"<h3>Abstract</h3> <p>Single lithium-ion conducting polymer electrolytes are promising candidates for next generation safer lithium batteries. In this work, Li<sup>+</sup>-conducting Nafion membranes have been synthesized by using a novel single-step procedure. The Li-Nafion membranes were characterized by means of small-wide angle X-ray scattering, infrared spectroscopy and thermal analysis, for validating the proposed lithiation method. The obtained membranes were swollen in different organic aprotic solvent mixtures and characterized in terms of ionic conductivity, electrochemical stability window, lithium stripping-deposition ability and their interface properties versus lithium metal. The membrane swollen in ethylene carbonate:propylene carbonate (EC:PC, 1:1 w/w) displays good temperature-activated ionic conductivities (<em>σ</em> ≈ 5.5 × 10<sup>–4</sup> S cm<sup>−1</sup> at 60 °C) and a more stable Li-electrolyte interface with respect to the other samples. This Li-Nafion membrane was tested in a lithium-metal cell adopting LiFePO<sub>4</sub> as cathode material. A specific capacity of 140 mAhg<sup>−1</sup>, after 50 cycles, was achieved at 30 °C, demonstrating the feasibility of the proposed Li-Nafion membrane.</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140044816","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}
Pub Date : 2024-03-01DOI: 10.1007/s40243-024-00256-9
khaled Charradi, Walid Mabrouk, Imen Ben Kacem, Nizar Bellakhal, Youssef O. Al-Ghamdi, Riadh Marzouki, Sherif M. A. S. Keshk
Low-sulfonation-level polyether sulfone octyl sulfonamide (LSPSO) was blended with a layered double hydroxides (LDHs, Mg2AlCl)/sepiolite nanostructure clay as a filler to create an electrolyte membrane for fuel cell applications. Comprehensive characterization of the composite membranes was conducted, encompassing Fourier-transform infrared spectroscopy, X-ray diffraction, mechanical stability assessment, thermal gravimetric analysis, ion exchange capability, swelling characteristics, water uptake performance, and electrochemical impedance spectroscopy analysis. In comparison to the pristine LSPSO membrane, the presence of LDHs/sepiolite nanoarchitecture material within LSPSO exhibited superior water retention and proton conductivity values, especially at elevated temperatures. The proton conductivity of the composite membranes reached approximately 250 mS/cm, while the unmodified LSPSO membrane only achieved 35 mS/cm at 100 °C. Moreover, LSPSO composite membranes demonstrated enhanced chemical and thermal stability along with higher proton conductivity when compared to pristine LSPSO membranes. These findings highlight the potential of developing tailored LSPSO composite membranes to advance the prospects of commercial applications in proton exchange membrane fuel cells.
{"title":"Incorporation of multilayered double hydroxides/sepiolite augments proton conductivity performance in low sulfonated polyether sulfone octyl sulfonamide","authors":"khaled Charradi, Walid Mabrouk, Imen Ben Kacem, Nizar Bellakhal, Youssef O. Al-Ghamdi, Riadh Marzouki, Sherif M. A. S. Keshk","doi":"10.1007/s40243-024-00256-9","DOIUrl":"https://doi.org/10.1007/s40243-024-00256-9","url":null,"abstract":"<p>Low-sulfonation-level polyether sulfone octyl sulfonamide (LSPSO) was blended with a layered double hydroxides (LDHs, Mg<sub>2</sub>AlCl)/sepiolite nanostructure clay as a filler to create an electrolyte membrane for fuel cell applications. Comprehensive characterization of the composite membranes was conducted, encompassing Fourier-transform infrared spectroscopy, X-ray diffraction, mechanical stability assessment, thermal gravimetric analysis, ion exchange capability, swelling characteristics, water uptake performance, and electrochemical impedance spectroscopy analysis. In comparison to the pristine LSPSO membrane, the presence of LDHs/sepiolite nanoarchitecture material within LSPSO exhibited superior water retention and proton conductivity values, especially at elevated temperatures. The proton conductivity of the composite membranes reached approximately 250 mS/cm, while the unmodified LSPSO membrane only achieved 35 mS/cm at 100 °C. Moreover, LSPSO composite membranes demonstrated enhanced chemical and thermal stability along with higher proton conductivity when compared to pristine LSPSO membranes. These findings highlight the potential of developing tailored LSPSO composite membranes to advance the prospects of commercial applications in proton exchange membrane fuel cells.</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140001526","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}
Pub Date : 2024-03-01DOI: 10.1007/s40243-023-00252-5
Ryohei Mori
Climate change and global warming problem are becoming the serious issue and some action is necessary in order to mitigate the rising temperature. CO2 increase is one of the reason for temperature rise, and the technology to convert CO2 to beneficial energy or chemical substance could be one of the key solution (CO2 photocatalytic reduction). Metal–organic frameworks (MOFs) have gained much attention owing to their extremely large surface areas, tunable fine structures, and potential applications in many areas. Recently, MOFs have been demonstrated to be promising materials for CO2 photocatalytic reduction. This review summarized recent research progresses in photocatalytic reduction using MOFs. MOFs were classified mainly by the type of metal center, and the feature and tendency against their functions towards CO2 photocatalytic activity will be explained.
气候变化和全球变暖问题日益严重,有必要采取一些行动来减缓气温的上升。二氧化碳增加是气温上升的原因之一,而将二氧化碳转化为有益的能源或化学物质的技术可能是关键的解决方案之一(二氧化碳光催化还原)。金属有机框架(MOFs)因其超大的表面积、可调的精细结构以及在许多领域的潜在应用而备受关注。最近,MOFs 被证明是一种很有前途的二氧化碳光催化还原材料。本综述总结了利用 MOFs 进行光催化还原的最新研究进展。主要根据金属中心的类型对 MOFs 进行分类,并阐述其在 CO2 光催化活性方面的功能特点和发展趋势。
{"title":"CO2 photocatalytic reduction with robust and stable metal–organic framework: a review","authors":"Ryohei Mori","doi":"10.1007/s40243-023-00252-5","DOIUrl":"https://doi.org/10.1007/s40243-023-00252-5","url":null,"abstract":"<p>Climate change and global warming problem are becoming the serious issue and some action is necessary in order to mitigate the rising temperature. CO<sub>2</sub> increase is one of the reason for temperature rise, and the technology to convert CO<sub>2</sub> to beneficial energy or chemical substance could be one of the key solution (CO<sub>2</sub> photocatalytic reduction). Metal–organic frameworks (MOFs) have gained much attention owing to their extremely large surface areas, tunable fine structures, and potential applications in many areas. Recently, MOFs have been demonstrated to be promising materials for CO<sub>2</sub> photocatalytic reduction. This review summarized recent research progresses in photocatalytic reduction using MOFs. MOFs were classified mainly by the type of metal center, and the feature and tendency against their functions towards CO<sub>2</sub> photocatalytic activity will be explained.</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140001521","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}
Pub Date : 2024-02-16DOI: 10.1007/s40243-023-00251-6
Walid Mabrouk, Khaled Charradi, Imen Ben Kacem, Ridha Lafi, Nizar Bellakhal, Riadh Marzouki, Sherif M. A. S. Keshk
An innovative methodology was employed to fabricate ion exchange membranes tailored for fuel cell applications. This approach entailed blending low sulfonated polyether sulfone octyl sulfonamide (LSPSO) with Hectorite (Hect) clay at varying weight percentages (1 wt%, 3 wt%, and 6 wt%). The resultant composite membranes underwent comprehensive characterization via Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis, aiming to assess their surface morphology and thermal resilience. Remarkably, the thermal stability of the composite membrane exhibited a substantial enhancement in comparison to the pristine LSPSO membrane. Moreover, the incorporation of 6 wt% Hectorite into the composite membrane yielded a noteworthy amplification in proton conductivity, achieving a fourfold increase (141.66 mS/cm) as opposed to the LSPSO membrane in isolation (35.04 mS/cm). Consequently, the Hect/LSPSO composite membrane exhibits remarkable potential as an electrolyte membrane for fuel cells operating at temperatures surpassing 100 °C.
{"title":"Significant augmentation of proton conductivity in low sulfonated polyether sulfone octyl sulfonamide membranes through the incorporation of hectorite clay","authors":"Walid Mabrouk, Khaled Charradi, Imen Ben Kacem, Ridha Lafi, Nizar Bellakhal, Riadh Marzouki, Sherif M. A. S. Keshk","doi":"10.1007/s40243-023-00251-6","DOIUrl":"https://doi.org/10.1007/s40243-023-00251-6","url":null,"abstract":"<p>An innovative methodology was employed to fabricate ion exchange membranes tailored for fuel cell applications. This approach entailed blending low sulfonated polyether sulfone octyl sulfonamide (LSPSO) with Hectorite (Hect) clay at varying weight percentages (1 wt%, 3 wt%, and 6 wt%). The resultant composite membranes underwent comprehensive characterization via Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis, aiming to assess their surface morphology and thermal resilience. Remarkably, the thermal stability of the composite membrane exhibited a substantial enhancement in comparison to the pristine LSPSO membrane. Moreover, the incorporation of 6 wt% Hectorite into the composite membrane yielded a noteworthy amplification in proton conductivity, achieving a fourfold increase (141.66 mS/cm) as opposed to the LSPSO membrane in isolation (35.04 mS/cm). Consequently, the Hect/LSPSO composite membrane exhibits remarkable potential as an electrolyte membrane for fuel cells operating at temperatures surpassing 100 °C.</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139750646","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}