Article
Materials Science, Ceramics
Siqi Ma, Xuehui Liu, Shuai Fu, Shengjian Zhao, Peigang He, Xiaoming Duan, Zhihua Yang, Dechang Jia, Paolo Colombo, Yu Zhou
Summary: In this study, a novel strategy for direct ink writing of porous SiC parts using geopolymers (GP) as binders and sintering SiC/GP composites at high temperatures via carbothermal reduction was reported. The results showed that porous SiC carriers with high porosity and hierarchical porous structure could be obtained by adjusting the treatment temperatures, which could be used for the removal of hazardous materials from wastewater.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Engineering, Chemical
Guangzheng Yao, Yongli Li, Qiang Guo, Tao Qi, Zhancheng Guo
Summary: The Hoganas method is used to produce high-purity reduced iron powder by adding pyrite as an optimal additive, resulting in RIP with an iron grade of 99.65% under optimized conditions. This method facilitates the separation of metallic iron from oxide impurities by forming a molten iron sulfide phase.
Article
Chemistry, Multidisciplinary
Advaith Rau, Ken Knott, Kathy Lu
Summary: Bulk and porous SiOC materials were synthesized using a PDC method with Fe catalyst, showing enhanced beta-SiC content and phase separation of the amorphous SiOxCy phase. Fe-catalyzed samples at 1100 degrees C exhibited significant beta-SiC content and improved gas sorption capabilities. Gibbs free energy minimization method and vapor-liquid-solid (VLS), solid-liquid-solid (SLS), and classical nucleation theories were used to analyze the Fe effect on the phase content of the pyrolyzed samples.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Materials Science, Multidisciplinary
Meng Cao, Lei Li, Shu Ya Wu, Xiang Ming Chen
Summary: The effect of ceramic connectivity on the microwave dielectric properties of porous ceramics is investigated using CaTiO3 as the model material. It is found that increasing the sintering temperature significantly improves the ceramic connectivity and leads to a dramatic improvement in the microwave dielectric properties. Finite element analysis reveals that ceramic connectivity plays a dominant role in determining the electric field distribution and dielectric response.
Article
Nanoscience & Nanotechnology
Benito Roman-Manso, Joseph Muth, Lorna J. Gibson, Wolfgang Ruettinger, Jennifer A. Lewis
Summary: The hierarchical porous ceramics with controlled pore size, volume, and interconnectivity were successfully designed and assembled via direct foam writing. The sintered ceramic foams exhibited specific permeabilities and compressive strengths that varied with specific interfacial area, showing potential for various applications such as particulate filters, catalyst supports, and battery electrodes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Ruiqi Zeng, Nan Wang, Wei Li
Summary: In this study, the effect of MgO addition on the reduction of Hongge vanadium titanomagnetite pellet (HVTMP) was investigated. The results showed that the addition of MgO increased the porosity of HVTMP, leading to a higher initial reduction rate but a lower final reduction degree. X-ray diffraction analysis revealed the formation of MgFe2O4, which hindered the further reduction of Fe2TiO4 and the migration of metallic iron. The reduction swelling decreased and the compressive strength of the reduced HVTMP increased with increasing MgO addition, mainly due to the increased hardness. This study establishes a relationship between MgO and reduction, providing valuable insights for the effective utilization of HVTMP in shaft furnaces and the development of sustainable metallurgy.
Article
Materials Science, Ceramics
Xiaoqian Liu, Yang Zhou, Xufeng Liu, Runfeng Li, Shibo Li, Cuiwei Li
Summary: This study prepared porous ceramics with high silicon carbide content using iron tailings through carbothermal reduction sintering process and improved the thermal conductivity. The carbothermal reduction of SiO(2) occurs above 1300 degrees C, generating liquid phase to enhance porosity.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2021)
Article
Microbiology
Efrat Eliani-Russak, Zohar Tik, Shaked Uzi-Gavrilov, Michael M. M. Meijler, Orit Sivan
Summary: Microbial dissimilatory iron reduction is a fundamental respiratory process that occurs in diverse habitats, including aquatic sediments. This study demonstrates the capability of the methanogenic archaeon Methanosarcina barkeri to reduce naturally abundant iron oxides in methane production zones. The results also suggest a potential role of methanophenazines in electron transfer from the cell to minerals.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Materials Science, Multidisciplinary
John J. Bowen, Shahryar Mooraj, Jacob A. Goodman, Siyuan Peng, Dayton P. Street, Benito Roman-Manso, Emily C. Davidson, Kara L. Martin, Lisa M. Rueschhoff, Scott N. Schiffres, Wen Chen, Jennifer A. Lewis, Matthew B. Dickerson
Summary: This article presents a method that combines self-assembly and 3D printing to create hierarchically porous ceramic architectures. By utilizing additive manufacturing and nanoscale porosity generation, ceramic lattices with excellent mechanical energy absorption and low thermal conductivity can be produced.
Article
Materials Science, Ceramics
Mitchell L. Sesso, Sonya Slater, John Thornton, George V. Franks
Summary: A method for producing hierarchical multi-scale porous ultra-high temperature ceramics (zirconium diboride, ZrB2) using 3D printing has been developed. The ceramics exhibit high strength to density ratio, making them potentially suitable for insulation near very high-temperature surfaces in aerospace applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Quyang Liu, Wei Zhai
Summary: In this study, hierarchical porous ceramic lattices were fabricated using direct ink writing (DIW) technique and emulsion processing methods, and it was discovered that different gelling additives led to distinctive microstructures. The 3D printed hierarchical porous ceramics exhibited high porosity and compressive strength, making them suitable for various applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Dan Wang, Hao Xu, Peixia Yang, Lihui Xiao, Lei Du, Xiangyu Lu, Ruopeng Li, Jinqiu Zhang, Maozhong An
Summary: A dual-template strategy has been proposed for constructing hierarchically porous Fe-N-C catalysts, leading to improved active site accessibility and mass transfer, thereby enhancing ORR activity in Zn-air batteries. The experimental results showed significant improvements in both active site accessibility and mass transfer, resulting in enhanced ORR activity in conventional three-electrode cells and a high performance in a real-world liquid Zn-air battery.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Green & Sustainable Science & Technology
Alberto Boretti
Summary: This work proposes the use of hydrogen for the direct reduction of iron. By increasing the share of hydrogen in the reducing gas, greenhouse gas emissions can be significantly reduced. The full potential of hydrogen DRI can be achieved with the complete adoption of green hydrogen for a zero-emission stable electric grid and non-electric energy uses. The market perspective for hydrogen DRI is promising, driven by decarbonization goals, policy support, investor interest, industry collaboration, technological advancements, sustainability, and brand value.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Congli Qin, Dongdong Yao, Cheng Cheng, Huijun Xie, Zhen Hu, Jian Zhang
Summary: Nitrate and sulfate are crucial factors causing eutrophication and black and odorous water, and constructed wetlands serve as the last ecological barrier for effluent treatment. This study explored the simultaneous removal of nitrate and sulfate using different combinations in constructed wetland microcosms. Results showed that zero-valent iron played a key role in the reduction of nitrate and sulfate, leading to efficient removal of these pollutants.
ENVIRONMENTAL RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Jinjin Cao, Wenfeng Li, Huishi Guo, Xin Feng, Baoliang Liu, Tianzi Shen, Yonggai Hou, Kai Shi, Jin Peng, Jingxuan Wang, Yi Xia
Summary: In this study, nano-CaCO3 and nano-iron phosphate were used to stabilize the crystal-to-crystal transformations of SiO2 and prepare SiO2 porous ceramics through a simple and environmental direct foaming method. The results showed that the addition of nano-CaCO3 and nano-iron phosphate promoted the formation of tridymite and densification of SiO2 porous ceramics, increasing their pore wall thickness and improving compressive strength. The compressive strength of SiO2 porous ceramics was proportional to their relative density, consistent with Ashby's theory. The study concluded that nano-CaCO3 was a better mineralizer than nano-iron phosphate in SiO2 porous ceramics. This research enriches the fabrication technology of energy-saving and environmentally friendly SiO2 porous ceramics, which is of great significance to practical production and application.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Daniela V. Lopes, Aleksey D. Lisenkov, Luis C. M. Ruivo, Aleksey A. Yaremchenko, Jorge R. Frade, Andrei V. Kovalevsky
Summary: The alkaline electrolytic production of iron is gaining interest for its potential to reduce CO2 emissions and energy consumption. This study explores the use of a new iron-bearing mineral, Fe2TiO5, as an alternative feedstock for electrochemical reduction. The results suggest that Fe2TiO5 alone is not a feasible material for electrolytic iron production, but it can be combined with other iron oxide materials and/or ores to promote electroreduction.
Article
Energy & Fuels
Luis C. M. Ruivo, Helena Gomes, Daniela V. Lopes, Aleksey A. Yaremchenko, Catarina Vilas-Boas, Luis A. C. Tarelho, Jorge R. Frade
Summary: In this study, catalytic gasification of biomass using a supported Fe2-xMnxO3 catalyst was investigated. The catalyst was found to have a significant impact on tar conversion and gasification parameters. Post-mortem analysis of the catalyst provided insights into redox changes and the presence of sulfur.
Article
Materials Science, Ceramics
Rui G. Pinto, Jorge R. Frade, Aleksey A. Yaremchenko
Summary: Single-phase cerium aluminate was successfully synthesized through controlled milling and firing in reducing or inert atmospheres. High-energy milling improved reactivity by promoting homogeneity and reducing Al oxidation, resulting in higher conversion rates. The choice of firing atmosphere also influenced the reaction outcome.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Daniela Lopes, Nuno F. Santos, Jorge P. Moura, Antonio J. S. Fernandes, Florinda M. Costa, Andrei Kovalevsky
Summary: Efficient energy storage from intermittent renewables can rely on alkaline electrolysis for converting temporary energy excess into oxygen and green hydrogen. Electrodes made of laser-induced graphene (LIG) materials are promising for water splitting but require proper design and processing optimization. This study focuses on the effects of laser processing on LIG electrode performance in alkaline media and provides guidelines for hydrogen production by selecting suitable laser processing conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
G. Marques, M. A. Valente, A. V. Kovalevsky, F. M. Costa, N. M. Ferreira
Summary: This study explores the application of an external magnetic field during the growth of CaMn0.9Gd0.1O3 to tune and enhance its magnetic properties. The results show that applying an external magnetic field can improve grain alignment and magnetization under certain conditions.
Article
Energy & Fuels
Jeffrey Capito, Jorge Martins, Seyedali Emami, Dzmitry Ivanou, Adelio Mendes
Summary: Dye-sensitized solar cells (DSSC) are a rapidly evolving indoor PV technology for providing long-term wireless power to IoT devices and wireless sensors. Encapsulating DSSCs with glass frits has proven to be the most durable method, and this study successfully achieved glass sealing of the electrolyte injection holes by structuring the glass into a capillary shape. The fully glass-sealed DSSCs demonstrated superior stability and performance compared to conventionally polymer-sealed and partially glass-sealed counterparts.
Article
Chemistry, Physical
Carolina Hora, Fatima Santos, Maria Goreti Ferreira Sales, Dzmitry Ivanou, Adelio Miguel Mendes
Summary: This study investigates the optimization of dye-sensitized solar cells (DSSCs) for indoor applications and explores the impact of various factors on charge transfer, recombination, and photovoltaic response. The optimized DSSCs demonstrate great potential as efficient indoor photovoltaics and back-illuminated devices.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Jorge Martins, Seyedali Emami, Dzmitry Ivanou, Adelio Mendes
Summary: A new low-temperature laser-assisted glass frit sealing process has been developed in this study, which is compatible with most heat-sensitive materials used in DSSCs and does not affect device performance. The sealing exhibits high hermeticity and durability, complying with relevant standards, and can be applied to various types of DSSC devices.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Ceramics
I. Antunes, L. C. M. Ruivo, L. A. C. Tarelho, A. A. Yaremchenko, A. V. Kovalevsky, J. R. Frade
Summary: The manganese ferrite was synthesized by milling reactive siderite and MnO2 powder mixtures, with and without subsequent heat treatment. The impact of milling conditions and calcination temperature on conversion of precursors was assessed, based on XRD peaks intensities and thermogravimetry. The best conditions for complete conversion were obtained by milling at 650 rpm for 6 h and calcination at 650 degrees C. The processing conditions affected the structural features of the spinel phase, and the conversion of FeCO3 occurred more readily than MnO2.
CERAMICS INTERNATIONAL
(2023)
Article
Thermodynamics
Luis Ruivo, Tiago Silva, Daniel Neves, Luis Tarelho, Jorge Frade
Summary: The aim of this study was to develop a graphical approach to support the operation of iron-based catalysts under gasification conditions. Experimental data and thermodynamic modelling were used to understand the dependence of catalyst performance on the thermochemical conditions of producer gas. The results suggest that controlled process parameters can enhance the tolerance of iron-based materials to deactivation and stabilize relevant active phases.
Article
Materials Science, Multidisciplinary
N. M. Ferreira, F. Carreira, A. V. Kovalevsky, F. M. Costa, M. A. Valente
Summary: In this study, Ca1-xPrxMnO3 (x = 0.03, 0.06, 0.1) materials were prepared using the Laser Floating Zone (LFZ) technique under different pulling rates (25-100 mm/h) in air and argon atmospheres. The formation of secondary phases in (Ca,Pr)MnO3 fibers was promoted by the processing conditions, and the perovskite phase was observed at slower pulling rates. The effects of LFZ conditions on the phase composition, microstructural features, electric and magnetic properties of the fibers were analyzed and discussed. The results showed that LFZ processing conditions greatly influenced the electrical and magnetic properties of the prepared manganites. The formation of secondary phases increased with pulling rate, but additional heat treatment at high temperatures minimized their effects and improved the electrical conductivity and magnetization of the thermally-treated fibers.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Electrochemistry
Clara Boehme, Maksim Starykevich, Gabriel Constantinescu, Andrei V. Kovalevsky, Daniela V. Lopes
Summary: Iron ore can be used as a potential feedstock for the electrowinning of iron, but the presence of different iron oxide types poses difficulties and further studies are required to establish electrowinning as an alternative technology for iron production. Previous studies have shown adverse effects on the Faradaic efficiency when using magnetite as feedstock. This study demonstrates, for the first time, the possibility of obtaining relatively high Faradaic efficiencies (66%) with hematite-magnetite mixtures at low temperature (80 degrees C).
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Analytical
Carolina S. Hora, Ana P. M. Tavares, Liliana P. T. Carneiro, Dzmitry Ivanou, Adelio M. Mendes, Goreti F. Sales, M. Goreti F. Sales
Summary: This work proposes an integrated power solution, with an autonomous and self-signaling biosensing device, to detect sarcosine, a known biomarker for prostate cancer. The biosensor is assembled on the counter-electrode of a dye-sensitized solar cell (DSSC), using molecular imprinting to produce the biorecognition element. The device is completely equipment-free and suitable for point-of-care analysis.
Article
Chemistry, Physical
Kiryl Zakharchuk, Andrei Kovalevsky, Aleksey Yaremchenko
Summary: Ruddlesden-Popper La2-xBaxNiO4 +/-delta (x = 0-1.1) nickelates were synthesized and evaluated for electrocatalytic applications. The study included characterization of structural, microstructural, and dilatometric properties, determination of oxygen nonstoichiometry, measurement of electrical conductivity and oxygen permeability, and assessment of chemical compatibility. The formation of phase-pure solid solutions was limited to x = 0.5. The substitution of lanthanum by barium in La2-xBaxNiO4+delta resulted in a decrease in oxygen excess and the generation of electron-holes, leading to an increase in p-type electronic conductivity. The ceramics showed moderate thermal expansion coefficients and good chemical compatibility with BaZr0.85Y0.15O3-delta solid electrolyte.
Article
Chemistry, Physical
Denis Alikin, Kiryl Zakharchuk, Wenjie Xie, Konstantin Romanyuk, Maria J. Pereira, Blanca I. Arias-Serrano, Anke Weidenkaff, Andrei Kholkin, Andrei V. Kovalevsky, Alexander Tselev
Summary: Thermoelectric conversion could play a significant role in future energy technologies. Oxide-based thermoelectric composite ceramics have attracted attention as a promising approach to control electrical and thermal conductivity for improved thermoelectric performance. However, the variability of composite properties, even with identical preparation routes, requires detailed studies of thermal transport at the local scale in order to be understood.
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)