Article
Chemistry, Physical
Vanessa S. Antonin, Lanna E. B. Lucchetti, Felipe M. Souza, Victor S. Pinheiro, Joao C. Moura, Aline B. Trench, James M. de Almeida, Pedro A. S. Autreto, Marcos R. V. Lanza, Mauro C. Santos
Summary: The catalytic activity of NaNbO3 microcubes decorated with CeO2 nanorods on carbon for H2O2 electrogeneration was investigated. The electrochemical characterization results showed that NaNbO3@CeO2/C catalysts had a higher H2O2 electrogeneration rate compared to pure Vulcan XC72. The enhancement of oxygen-containing functional groups and the role of CeO2 in facilitating electron transfer were also demonstrated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Green & Sustainable Science & Technology
Kang Wang, Zhaolian Zhu, Dan Xu, Muyao Li, Shiyu Yuan, Hailing Wang
Summary: This study used cheap graphite powder and PTFE to fabricate a graphite/PTFE composite coating cathode for efficient electrochemical synthesis of H2O2. The influence of different factors, such as cathode thickness, area, pH, and current density, on H2O2 electrogeneration was examined. Optimizing cathode geometric parameters and operation conditions led to increased H2O2 accumulation and current efficiency.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2022)
Article
Chemistry, Multidisciplinary
Jadranka Milikic, Sara Knezevic, Stevan Stojadinovic, Mabkhoot Alsaiari, Farid A. Harraz, Diogo M. F. Santos, Biljana Sljukic
Summary: CuAg/rGO and CoAg/rGO nanoparticles exhibited good electrocatalytic performance for ORR and HPRR reactions in alkaline media. The CoAg/rGO electrocatalyst showed faster ORR kinetics, higher diffusion current density, and a greater number of electrons transferred compared to CuAg/rGO.
Article
Materials Science, Multidisciplinary
Zhixing Wu, Penghui Ding, Viktor Gueskine, Robert Boyd, Eric Daniel Glowacki, Magnus Oden, Xavier Crispin, Magnus Berggren, Emma M. Bjork, Mikhail Vagin
Summary: Electrocatalysis plays a crucial role in achieving sustainable chemical production using abundant resources and renewable energy. In this study, we developed an effective electrochemical method for producing hydrogen peroxide (H2O2) using only pure water and oxygen. Nickel (II) oxide (NiO) was used as the electrocatalyst for oxygen evolution reaction (OER) at the anode, while a conducting polymer poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS) drove the oxygen reduction reaction (ORR) at the cathode to generate H2O2. The conversion efficiency of the H2O2 electrochemical refinery was limited by unbalanced ionic transport in the solid electrolyte, but optimization of operation conditions achieved an efficiency of 80%.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Analytical
Aline B. Trench, Joao Paulo C. Moura, Vanessa S. Antonin, Tuani C. Gentil, Marcos R. V. Lanza, Mauro C. Santos
Summary: The production of H2O2 through oxygen reduction reaction (ORR) is an attractive alternative method, and this study proposes a modified electrocatalyst that enhances the selectivity and efficiency of H2O2 generation while reducing energy consumption. The changes on the proposed catalyst's surface are attributed to the insertion of 1% Nb2O5 nanorods.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Environmental
Hao Jiang, Yian Wang, Jue Hu, Xuxia Shai, Chengxu Zhang, Thiquynhxuan Le, Libo Zhang, Minhua Shao
Summary: In this study, highly selective and stable tungsten trioxide catalysts for H2O2 generation through 2e(-) oxygen reduction reaction (2e(-) ORR) were developed using a phase regulation strategy. The catalyst exhibited high selectivity and production rate, outperforming previous catalysts under the same conditions. It also showed excellent stability during continuous testing.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
L. C. Trevelin, R. B. Valim, J. C. Lourenco, A. De Siervo, R. S. Rocha, M. R. V. Lanza
Summary: This study demonstrates the effective enhancement of H2O2 generation by using modified PL6C catalysts. The electrochemical tests and characterization analyses reveal that 50/50 ZrNb/PL6C and 1% ZrMo/PL6C have higher H2O2 selectivity and lower energy consumption compared to unmodified PL6C.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Xiao Huang, Min Song, Jian Zhang, Jingjing Zhang, Wei Liu, Chang Zhang, Wang Zhang, Deli Wang
Summary: This study investigates the H2O2 electrosynthesis performance of three MXene materials and finds that MXenes exhibit excellent two-electron ORR catalytic activity and high stability. Among them, Nb2CTx catalyst shows the best performance with high H2O2 production and rapid organic dye decoloration ability.
Article
Chemistry, Multidisciplinary
Ziliang Chen, Jie Wu, Zhengran Chen, Hongyuan Yang, Kai Zou, Xiangyong Zhao, Ruihong Liang, Xianlin Dong, Prashanth W. Menezes, Zhenhui Kang
Summary: This study employs an entropy-enhancement strategy to enable low-cost perovskite oxide to effectively catalyze the electrosynthesis of H2O2. The optimized Pb(NiWMnNbZrTi)(1/6)O-3 ceramic exhibits commendable ORR activity in alkaline media, displaying high selectivity for H2O2 and exceptional degradation property for organic dyes through the Fenton process.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Shumail Farhan, Munazza Mohsin, Asif Hassan Raza, Rimsha Anwar, Bilal Ahmad, Rizwan Raza
Summary: In this study, Fe-Mn co-doped ceria powders were synthesized by sol gel method and evaluated as cathode materials for intermediate temperature solid oxide fuel cell (IT-SOFC). The combination of Fe and Mn enhanced the ceria catalytic activity and oxygen kinetics. The effects of the co-doping mechanism on the phase composition, optical behavior, and electrochemical performance were investigated. The results showed that the inclusion of Fe and Mn into ceria can be used as an effective catalytic promoter, and the composition of FMDC4 resulted in the highest conductivity, stability, and power density.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Sooraj Mohan, P. Dinesha
Summary: The use of biodiesel in CI engines has the potential to reduce carbon and hydrocarbon emissions, but it also leads to increased NOx emissions. Recent research has shown that hydrogen peroxide and CeO2 nanoparticles can help reduce emissions in biodiesel blends. Increasing the concentration of hydrogen peroxide improves combustion and reduces CO, HC, and NOx emissions. The concentration of CeO2 nanoparticles also has a positive impact on emissions and brake thermal efficiency, although its effect is not as significant as hydrogen peroxide emulsification.
Article
Chemistry, Physical
Qingjia Sun, Guanxing Xu, Bingyan Xiong, Lisong Chen, Jianlin Shi
Summary: Electrocatalytic 2e(-) oxygen reduction reaction (2e(-) ORR) is a promising method for H2O2 production in acidic media. In this study, a novel and high-performance 2e(-) ORR electrocatalyst, NiSe2, was developed and the influence of different anion species on the catalyst performance was investigated. The synthesized NiSe2 exhibited outstanding 2e(-) ORR performance and long-term durability.
Article
Chemistry, Physical
Zekun Wu, Tianzuo Wang, Ji-Jun Zou, Yongdan Li, Cuijuan Zhang
Summary: In this study, a catalyst of amorphous nickel oxide supported on carbon nanosheets was prepared using the photochemical metal organic deposition method, and its activity in the oxygen reduction reaction was investigated. The results show that the amorphous NiOx exhibits high efficiency and selectivity, making it a promising catalyst for the synthesis of H2O2.
Article
Materials Science, Multidisciplinary
Hui Xu, Meng Jin, Jing Geng, Shengbo Zhang, Haimin Zhang
Summary: In this study, Ni nanoparticles anchored on carbon fibers were synthesized as efficient catalysts for the production of H2O2. The optimized catalyst showed high selectivity and efficiency in alkaline electrolyte.
SCIENCE CHINA-MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Yani Ding, Wei Zhou, Jihui Gao, Fei Sun, Guangbo Zhao
Summary: This review systematically classifies the preparation methods of N-doped carbon-based electrocatalysts with different nitrogen forms, discusses the mechanism of specific nitrogen morphology on two-electron ORR, especially the selectivity, and analyzes the factors affecting the ORR selectivity of N-doped electrocatalysts. The potential applications of N-doped electrocatalysts in oxygen reduction reaction are highlighted.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Chemistry, Physical
Sirlon F. Blaskievicz, Ivo Freitas Teixeira, Lucia Helena Mascaro, Juliana Ferreira de Brito
Summary: In this study, a new photoelectrochemical nitrogen reduction reaction using carbon nitride, poly(heptazine imide) (PHI), and Nb2O5 nanotubes was developed for ammonia synthesis under mild conditions. The presence of PHI in the photocathode not only improved stability compared to bare Nb2O5, but also increased the ammonia generation rate by about 10-fold. The results suggest that this photocathode has the potential to be a promising alternative to the conventional Haber-Bosch process.
Article
Chemistry, Physical
Isaac Sanchez-Montes, Jussara Carneiro Doerenkamp, Yeison Nunez-de la Rosa, Peter Hammer, Romeu C. Rocha-Filho, Jose M. Aquino
Summary: Proper treatment of water and wastewater is currently a major concern, and this study aims to synthesize, characterize, and use functionally modified graphitic carbon nitride to assess its performance in the oxidation of the herbicide tebuthiuron. The results show that complete oxidation of tebuthiuron is achieved under acidic conditions using hydrogen peroxide as the oxidant, producing carboxylic acids and nitrate ions as the main products.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Organic
Alejandro Suarez-Lustres, Nuria Martinez-Yanez, Alvaro Velasco-Rubio, Jesus A. Varela, Carlos Saa
Summary: The first Pd-catalyzed [5 + 2] rollover annulation of 1-benzylpyrazoles with alkynes has been developed to assemble 10H-benzo[e]pyrazolo-[1,5-a]azepines (tricyclic 2-benzazepines). The rollover annulation involves twofold C-H activation of aryl and heteroaryl C-sp(2)-H bonds (C-H/C-H) of 1-benzylpyrazoles (five-atom partners) and alkynes, resulting in [5 + 2] annulated compounds.
Article
Chemistry, Analytical
Andre Olean-Oliveira, Heitor F. Trevizan, Celso X. Cardoso, Marcos F. S. Teixeira
Summary: This paper presents a systematic study on the electrochemical impedance of various alcohols using a sensor based on nickel-salen metallopolymer. The application of principal component analysis (PCA) was used for the identification of contaminants in alcoholic beverages. The reactivity of alcohols on the device was found to be directly related to pKa values and polarity index through electrochemical impedance analysis. A system that differentiates different types of alcohols based on impedimetric variables was successfully established using multivariate analysis.
Editorial Material
Green & Sustainable Science & Technology
Alexsandro J. dos Santos, Haruna L. Barazorda-Ccahuana, Griselda Caballero-Manrique, Yvens Cheremond, Patricio J. Espinoza-Montero, J. Ricardo Gonzalez-Rodriguez, Ulises J. Jauregui-Haza, Marcos R. V. Lanza, Andrea Najera, Carla Oporto, Andres Perez Parada, Tzayam Perez, Valeria Delgado Quezada, Veronica Rojas, Velia Sosa, Abdoulaye Thiam, Ricardo A. Torres-Palma, Ronald Vargas, Sergi Garcia-Segura
NATURE SUSTAINABILITY
(2023)
Article
Chemistry, Inorganic & Nuclear
H. Moreno, G. L. Domingues, M. Assis, P. P. Ortega, V. R. . Mastelaro, M. A. . Ramirez, A. . Z. Simoes
Summary: This study investigates the morphology and photocatalytic properties of CeO2 nanocrystals synthesized using microwave-assisted solvothermal method with acetone and ethanol as solvents. The results show that CeO2 synthesized in acetone has more emission peaks in the blue region, possibly due to higher Ce3+ concentration, while CeO2 synthesized in ethanol exhibits a strong orange-red emission, suggesting the presence of oxygen vacancies. CeO2 synthesized in acetone demonstrates superior photocatalytic response compared to that synthesized in ethanol, possibly due to increased disorder in the CeO2 structure, leading to enhanced light absorption.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Chrystopher A. M. Pereira, Rafael A. C. Amoresi, Guilhermina F. Teixeira, Regiane C. Oliveira, Ubirajara Coleto Jr, Angelica R. da Luz, Priscila B. de Almeida, Alexandre Z. Simoes, Elias S. Monteiro Filho, Elson Longo, Leinig A. Perazolli
Summary: This study evaluated the impact of sodium hydroxide concentration on the synthesis of titanate-based photocatalysts. The results showed that increasing the chemical potential of NaOH stabilized the H2Ti3O7 center dot H2O phase and induced the growth of nanoparticles with nanosheet-like morphology. The photocatalyst exhibited efficient discoloration of Rhodamine B and high adsorption capacity for Methylene Blue.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Ariadne C. Catto, Sandrine Bernardini, Khalifa Aguir, Elson Longo, Luis F. da Silva
Summary: The development of simple and reproducible synthesis techniques for obtaining one-dimensional semi-conducting nanostructures is crucial for gas sensor devices. This study presents a facile and versatile approach for the in-situ growth of vertically oriented hematite nanorods as a resistive ozone gas sensor. The grown alpha-Fe2O3 nanorods exhibited good sensitivity to different ozone concentrations, fast response time, and repeatable response-recovery cycles. This research provides a promising way for designing high-performance gas sensors based on hematite nanorods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
X. Gratens, B. de Abreu Silva, M. I. B. Bernardi, H. B. de Carvalho, A. Franco Jr, V. A. Chitta
Summary: The magnetization of Zn1-xCoxO (0.0055 <= x <= 0.073) nanoparticles was measured as a function of temperature and magnetic field. The magnetic properties were found to be derived from the antiferromagnetic spin clustering of Co2+ nearest-neighbors. The magnetization curves showed a deviation from the expected behavior below 6 K, which was successfully explained by a model based on single-ion anisotropy and randomly oriented nanoparticles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Dentistry, Oral Surgery & Medicine
Kamila Rosamilia Kantovitz, Natalia Russo Carlos, Ivania Aparecida Pimenta Santos Silva, Caroline Braido, Bruna Carolina Costa, Igor Lebedenco Kitagawa, Francisco Humberto Nociti-Jr, Roberta Tarkany Basting, Francine Kuhl Panzarella de Figueiredo, Paulo Noronha Lisboa-Filho
Summary: This study characterized the ultrastructure and morphology of TiO2 nanotubes and investigated their physicochemical impact on high-viscosity conventional glass-ionomer cement (GIC). The results showed that TiO2 nanotubes were present in the GIC matrix, leading to changes in radiopacity, solubility, and color. However, the setting time of GIC was not affected by the presence of TiO2 nanotubes. These findings provide important information on the potential benefits of using TiO2 nanotubes in dental materials.
Article
Oncology
Natalia Russo Carlos, Rosanna Tarkany Basting, Flavia Lucisano Botelho do Amaral, Fabiana Mantovani Gomes Franca, Cecilia Pedroso Turssi, Kamila Rosamilia Kantovitz, Erika Soares Bronze-Uhle, Paulo Noronha Lisboa Filho, Vanessa Cavalli, Roberta Tarkany Basting
Summary: The purpose of this study was to analyze the physical-chemical properties of hydrogen peroxide (HP) agents at different concentrations and the association with or without TiO2 nanotubes. The study also aimed to evaluate dental bleaching effectiveness by using the HP agents together with or without TiO2 nanotubes, and applied with or without violet LED (VL). The results showed that the incorporation of TiO2 to the bleaching gel showed good stability with minimal variations in physical-chemical properties. HP35 had a more effective color change compared to HP7, and VL boosted the bleaching effectiveness of HP7, whereas TiO2 did not increase bleaching effectiveness.
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
(2023)
Article
Chemistry, Multidisciplinary
Amanda F. Gouveia, Samantha C. S. Lemos, Edson R. R. Leite, Elson Longo, Juan Andres
Summary: In this article, a simple computational model was developed using density functional theory calculations of ZnO surface energies and the Wulff construction to predict available morphologies and guide the search for field-emission scanning electron microscopy images. This model allows for understanding the routes of morphological evolution and their correlation with material properties based on theoretical calculations. It provides insights into enhancing the efficiency of metal-oxide-based materials through matching.
Article
Engineering, Environmental
Jany H. F. de Jesus, Karla V. L. Lima, Peter Hammer, Raquel F. P. Nogueira
Summary: An environmentally friendly strategy for recycling sewage sludge is proposed using a magnetic material as a catalyst in the photo-Fenton process. The catalyst showed no apparent alteration of surface after the process and maintained catalytic activity for at least 4 cycles. Comparison of degradation of pollutants in sewage treatment plant effluents under artificial UV and solar irradiation showed promising results for the use of SLC-600 as a low-cost catalyst in the photo-Fenton process.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
Joao Paulo C. Moura, Vanessa S. Antonin, Aline B. Trench, Mauro C. Santos
Summary: In this study, the electrochemical performances of α-MnO2/Vulcan XC-72 and 8-MnO2/Vulcan XC-72 nanostructures in hydrogen peroxide (H2O2) electrosynthesis were compared. Both materials were synthesized through a simple hydrothermal route and their structures and morphologies were analyzed using various techniques. The results showed that the 1%α-MnO2/C and 3%8-MnO2/C catalysts exhibited better efficiency and selectivity in the ORR 2-electron pathway compared to pure Vulcan XC-72. Furthermore, the 1%α-MnO2/C catalyst displayed higher activity in H2O2 electrogeneration using GDE, resulting in a 48% increase in peroxide accumulation compared to pure Vulcan XC-72 GDE.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Bruno D. Q. Villardi, Nivaldo G. P. Filho, Paulo V. R. Gomes, Julio Nandenha, Camila M. Godoi, Thais Lie Tagomori, Nathalia Azeredo, Rodrigo F. B. de Souza, Almir O. Neto, Priscilla J. Zambiazi
Summary: Fuel cells can convert biomass into electricity, and platinum catalysts show higher activity in the oxidation of sugars.
REVISTA VIRTUAL DE QUIMICA
(2023)
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)
