Review
Chemistry, Physical
E. Santos
Summary: The article discusses the limitations and risks of using thermodynamic and electronic properties as descriptors to obtain simple correlations in electro-catalysis.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Ravishankar G. Kadam, Tao Zhang, Dagmar Zaoralova, Miroslav Medved, Aristides Bakandritsos, Ondrej Tomanec, Martin Petr, Johnny Zhu Chen, Jeffrey T. Miller, Michal Otyepka, Radek Zboril, Tewodros Asefa, Manoj B. Gawande
Summary: A single-atom catalyst material named G(CN)-Co has been developed on functionalized graphene, demonstrating excellent catalytic activity for electrocatalytic hydrazine oxidation reaction (HzOR) with low overpotential and high current density, while remaining stable over long reaction times. This material shows promising potential as an alternative to conventional noble metal-based catalysts in HzOR-based fuel cells.
Article
Chemistry, Physical
Rui-Qing Li, Suyuan Zeng, Bin Sang, Chaozhuang Xue, Konggang Qu, Yu Zhang, Wei Zhang, Guangyu Zhang, Xinghui Liu, Jie Deng, Olivier Fontaine, Yachao Zhu
Summary: This article introduces a novel porous Ce-doped Ni3N nanosheet array as a bifunctional catalyst for efficient hydrogen evolution reaction and hydrazine oxidation reaction. The system operates at low voltages and exhibits excellent diffusion kinetics and low charge-transfer resistance.
Article
Electrochemistry
Ruihong Guo, Yujuan Zhang, Xiutang Zhang, Mingming Ma, Tuoping Hu
Summary: In this study, Co-based nanoparticles anchored on nitrogen-doped carbon substrates were successfully synthesized for hydrazine oxidation reaction. The optimal CoO/Co3O4@N-C-600 composite showed excellent activity and durability, surpassing the performance of commercial Pt/C catalyst. The heterojunction structure and mesoporous feature of the composite facilitated the adsorption and dehydrogenation of N2H4 and improved electrolyte penetration. Moreover, the assembled electrolyzer utilizing CoO/Co3O4@N-C-600||Pt/C exhibited lower voltage requirements for hydrazine-assisted hydrogen production, indicating higher energy-saving efficiency.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Rui-Qing Li, Suyuan Zeng, Bin Sang, Chaozhuang Xue, Konggang Qu, Yu Zhang, Wei Zhang, Guangyu Zhang, Xinghui Liu, Jie Deng, Olivier Fontaine, Yachao Zhu
Summary: In this study, a novel porous Ce-doped Ni3N nanosheet arrays were designed as a bifunctional catalyst for both hydrogen evolution reaction and hydrazine oxidation reaction. The catalyst showed remarkable performance with low cell voltages and high stability, which could be attributed to the exposed active sites and improved diffusion kinetics of the porous nanosheet arrays, as well as the promoted catalytic activity by Ce doping.
Article
Chemistry, Physical
Ruihong Guo, Lingling Gao, Yujuan Zhang, Xiutang Zhang, Mingming Ma, Tuoping Hu
Summary: In this study, CoP-Co2P@CC-300 composites self-supported on carbon cloth were prepared and showed excellent catalytic activity in hydrazine-assisted hydrogen production. The required voltages for hydrogen evolution reaction (HER) and hydrazine oxidation reaction (HzOR) on CoP-Co2P@CC-300 were comparable or even higher than that reported at 10 mA cm-2, indicating its high performance. Furthermore, an overall hydrazine splitting (OHzS) electrolyzer was assembled using CoP-Co2P@CC-300 electrodes, and it achieved efficient hydrogen production with a low cell voltage of 37 mV at 10 mA cm-2.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Viplove Mishra, Athma E. Praveen, Ayan Mondal, Venkataramanan Mahalingam
Summary: This study presents the fabrication of a Co3O4/CoS2 heterostructure for overall hydrazine-assisted water splitting using a facile and low-temperature hydrothermal technique. The structural analyses confirm the coexistence of Co3O4 and CoS2 phases with a significant interfacial interaction. The developed heterostructure exhibits superior electrochemical HzOR performance compared to individual Co3O4 and CoS2 phases.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xiaoyang Fu, Dongfang Cheng, Chengzhang Wan, Simran Kumari, Hongtu Zhang, Ao Zhang, Huaixun Huyan, Jingxuan Zhou, Huaying Ren, Sibo Wang, Zipeng Zhao, Xun Zhao, Jun Chen, Xiaoqing Pan, Philippe Sautet, Yu Huang, Xiangfeng Duan
Summary: A new type of RhRu0.5 alloy wavy nanowires is designed and synthesized as bifunctional electrocatalysts for hydrazine oxidation reaction (HzOR) and hydrogen evolution reaction (HER) in low-voltage green hydrogen production. The RhRu0.5 alloy wavy nanowires exhibit complete electrooxidation of hydrazine with low overpotential and high mass activity, as well as improved performance for HER.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Rudy Crisafulli, Dryade Ferreira de Paula, Sabrina C. Zignani, Lorenzo Spadaro, Alessandra Palella, Simona Boninelli, Jose A. Dias, Jose J. Linares
Summary: Using liquid fuels in fuel cells has advantages in terms of easier and safer handling, transportation, and storage. This study investigates the influence of copper as an auxiliary metal on palladium in direct hydrazine fuel cells. The addition of copper reduces the adsorption energies of adsorbed species and contributes to the oxidation of hydrazine, resulting in improved electroactivity. However, copper also slightly promotes the non-faradaic decomposition of hydrazine, leading to a slight loss in faradaic efficiency.
Article
Chemistry, Physical
Xueqing Gao, Rongrong He, Juan Du, Daojin Zhou, Aibing Chen, Xiaoming Sun
Summary: In this study, hydrogen production is achieved by coupling the waste heat of a solar cell with hydrazine degradation. A high-chaos nickel molybdenum phosphorus sulfide oxide monolithic electrode is reported, which exhibits extremely low voltage and excellent stability for bifunctional hydrazine splitting.
Article
Electrochemistry
Ansai Zhang, Huiling Liu, Cheng Wang
Summary: A CoNi-bimetal phosphide nanoparticles embedded P doped carbon matrix structure was successfully constructed for efficient hydrazine-assisted water splitting, providing a new technological pathway for energy-saving hydrogen production.
ELECTROCHIMICA ACTA
(2022)
Article
Electrochemistry
Yair Shahaf, Atif Mahammed, Arik Raslin, Amit Kumar, Eliyahu M. Farber, Zeev Gross, David Eisenberg
Summary: We have designed efficient electrocatalysts for alkaline hydrazine oxidation reaction (HzOR) by controlling the active site and supporting scaffold. These catalysts exhibit excellent activity and hierarchical porous structure, showcasing the importance of metallocorroles in the nitrogen cycle.
Article
Energy & Fuels
Zhongbao Feng, Tongtong Shi, Wentao Liu, Wanting Zhang, Han Zhang
Summary: The bifunctional (Ni,Co)(0.85)Se/rGO catalyst fabricated via electrodeposition shows superior electrocatalytic activity and stability towards hydrazine electrooxidation and oxygen evolution reaction. Its advantages include high electrochemical surface area, high electrical conductivity, and rapid release of bubbles from electrode surface. This study presents a versatile, cost-effective, and industrial strategy for producing highly active catalysts.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Kawa Hama Sharif, Hilal Kivrak, Omruye Ozok-Arici, Aykut Caglar, Arif Kivrak
Summary: In this study, thymol based hybrid molecules were synthesized and used as anode catalysts in fuel cells. The performance of these hybrid molecules was tested and they showed potential as a new generation anode catalyst for fuel cells.
Article
Chemistry, Physical
Patrick Gono, Alfredo Pasquarello
Summary: The outstanding performance of NiOOH/FeOOH-based oxygen evolution reaction (OER) catalysts is rationalized by a bifunctional mechanism involving two distinct active sites, which can effectively overcome the limitations imposed by the linear scaling relationships and improve overall activity.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Multidisciplinary Sciences
Walter Orellana, Cesar Zuniga Loyola, Jose F. Marco, Federico Tasca
Summary: The performances of FeTPP and CoTPP as electrocatalysts for the oxygen reduction reaction (ORR) were studied. The results showed that FeTPP exhibited the best performance after pyrolysis, maintaining the integrity of the macrocyclic complex and enhancing the interaction with O-2 through the interaction with the Vulcan substrate.
SCIENTIFIC REPORTS
(2022)
Review
Chemistry, Physical
Cesar Zuniga Loyola, Soledad Ureta-Zanartu, Jose H. Zagal, F. Tasca
Summary: Electrochemistry and electrochemical experiments are powerful tools for obtaining information about the thermodynamics and kinetics of electrochemical reactions. In this work, the study of the oxygen reduction reaction (ORR) is explored to clarify the significance and utility of obtaining volcano-type correlations to compare and identify the most active catalysts. This research is important for understanding the interactions between catalysts and reactants in energy conversion devices.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Review
Chemistry, Physical
Karina Munoz-Becerra, Jose H. Zagal, Ricardo Venegas, Francisco J. Recio
Summary: The oxygen reduction reaction (ORR) is crucial for energy conversion devices. However, the use of expensive and scarce noble metal catalysts is a limitation for mass production. Copper molecular catalysts that mimic metalloenzymes are being developed. This minireview presents strategies to increase the activity and stability of copper catalysts for ORR, including the use of flexible and active ligands, polymers as backbone, and synthesis of copper carbon-based catalysts.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
B. Valverde, M. Sancy, C. Martinez, E. Botello, E. Pio, C. Aguilar
Summary: In this study, Ti-13Ta-xSn samples with a porosity of approximately 35% were produced using the powder metallurgy technique. Microstructural analysis revealed that increasing the Sn content resulted in a decrease in the alpha-Ti and alpha'-Ti phases. Additionally, scanning electron microscopy and X-ray photoelectron spectroscopy demonstrated that the chemical composition of the passive oxide film was influenced by the Sn content. Furthermore, electrochemical analysis indicated that the protective properties of the oxide film were enhanced with the addition of Sn.
Article
Electrochemistry
Ricardo Venegas, Karina Munoz-Becerra, Sophie Juillard, Lin Zhang, Ruben Onate, Ingrid Ponce, Vincent Vivier, Francisco J. Recio, Carlos M. Sanchez-Sanchez
Summary: This study explores the catalytic activity and its evolution under operando conditions of two multicopper catalysts with different ligand flexibility. The results show that although both catalysts have similar instantaneous activity, the mechanism differs. It is demonstrated through experiments that the catalyst with higher flexibility exhibits a greater decrease in catalytic activity and higher production of byproducts, which correlates with the ligand structure.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Sergio Choque, Cesar Zuniga, Alberto Gonzalez, Alejandra Moenne, Riccarda Antiochia, Lo Gorton, Federico Tasca
Summary: Three different macroalgae, U. lactuca, U. linza, and U. compressa, were studied for biological photovoltaic energy system (BPVE) using edge plane pyrolytic graphite as the working electrode. The biophotoanodes were evaluated for direct and mediated electron transfer processes using different mediators. The results showed that using p-benzoquinone (BQ) as a mediator during the mediated electron transfer process significantly increased the electron transfer to the graphite electrode during light conditions.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Analytical
Cristina Tortolini, Valeria Gigli, Antonio Angeloni, Luciano Galantini, Federico Tasca, Riccarda Antiochia
Summary: In this work, a simple electrochemical immunosensor was developed for the detection of D-dimer protein in human plasma samples. The immunosensor was constructed by drop-casting chitosan nanoparticles (CSNPs) as a biocompatible support, Protein A (PrA) to facilitate antibody orientation, and D-dimer antibody onto a carboxyl functionalized multi-walled carbon nanotubes screen printed electrode (MWCNTs-SPE). The immunosensor showed promising performance in antibody immobilization and specific D-dimer detection, with a linear range from 2 to 500 μg L-1, LOD of 0.6 μg L-1, and sensitivity of 1.3 μA L μg(-1) cm(-2). The stability and fast response time (5 s) were also reported. Moreover, the immunosensor demonstrated satisfactory results in detecting D-dimer in human plasma samples.
Article
Chemistry, Physical
Cecilia Montero, Cristian Gino Ramirez, Lisa Munoz, Mamie Sancy, Manuel Azocar, Marcos Flores, Alfredo Artigas, Jose H. Zagal, Xiaorong Zhou, Alberto Monsalve, Maritza Paez
Summary: Climate change has driven the need to reduce carbon dioxide emissions, prompting the study of lighter alloys like magnesium for transport applications. However, magnesium alloys are prone to corrosion, leading to extensive research on surface treatments. This study investigates the impact of argon plasma pretreatment on the surface properties of an AZ31 magnesium alloy, specifically focusing on surface reactivity enhancement. The results show that the pretreatment increases surface energy, roughness, and oxygen species, thereby improving the protection capacity against corrosion.
Article
Chemistry, Physical
Camila Arcos, Carolina Guerra, Jorge A. Ramos-Grez, Mamie Sancy
Summary: Fuel cell technology has grown as a result of reduced reliance on fossil fuels and carbon emissions. This study investigates a nickel-aluminum bronze alloy used as an anode in fuel cells, exploring the impact of porous design and heat treatment on mechanical and chemical stability in molten carbonate. The results reveal the formation of molten salt deposits and corrosion products, as well as an increase in corrosion rate with the incorporation of porosity.
Article
Materials Science, Multidisciplinary
C. Aguilar, F. San Martin, C. Martinez, B. Camara, F. Claverias, A. Undabarrena, M. Sancy, V. Salinas, L. Munoz
Summary: This study investigates the potential of Ti-Ta-Sn alloys for biomedical applications due to their excellent mechanical properties and biocompatibility, with a particular focus on their use in trabecular bone replacement. The influence of Sn on the mechanical properties and antibacterial response of Ti-13Ta-xSn (x:3, 6, 9, and 12 at.%) alloy foams was analyzed. The Ti-based alloy foams showed no antibacterial activity nor bacterial adhesion, indicating that there is bacterial adhesion inhibition.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Environmental
S. Fernandez-Velayos, F. J. Recio, F. J. Palomares, N. Menendez, P. Herrasti, E. Mazario
Summary: Cu2O@CuxFeyO4 nanohybrids were synthesized as catalysts for tetracycline degradation. The nanohybrids showed a spherical morphology with an average diameter of 14(5) nm and high crystallinity. XPS results indicated a cuprite-enriched surface and a nonstoichiometric copper spinel structure in the inner layer. The electrochemical characterization demonstrated the synergistic effect of Fe3+/Fe2+ and Cu2+/Cu+ coupling in enhancing the activation of persulfate, resulting in higher degradation efficiency compared to other catalysts.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Review
Chemistry, Physical
Cesar Zuniga Loyola, Federico Tasca
Summary: Hydrogen fuel cells have the potential to store and convert chemical energy into electricity. The sluggish reaction occurring at the cathode, where molecular oxygen is reduced to water during the oxygen reduction reaction, is one of the major barriers to the mass diffusion of this technology. Recent advancements in efficient and durable nonprecious metal catalysts, particularly those based on penta-coordinated active sites derived from either molecular or pyrolyzed nature, have shown promise in improving the performance of fuel cell technology.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
Article
Electrochemistry
Laura Scarpetta-Pizo, Ricardo Venegas, Karina Munoz-Becerra, Lisa Munoz, Alejandro Toro-Labbe, Nadim Darwish, Ricardo Matute, Ruben Onate, Jose H. Zagal, Ingrid Ponce
Summary: Using reactivity predictors to enhance or control electrocatalytic activity is an interesting concept, especially for developing platinum metal group-free materials. In this study, FeN4 molecular catalysts were designed and synthesized to increase their catalytic performance for the ORR through the pull effect. Experimental findings revealed unexpected results, leading to a reconsideration of the interface effects on catalyst activity.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Laura Scarpetta-Pizo, Ricardo Venegas, Pablo Barrias, Karina Munoz-Becerra, Nayareth Vilches-Labbe, Francisco Mura, Ana Maria Mendez-Torres, Rodrigo Ramirez-Tagle, Alejandro Toro-Labbe, Samuel Hevia, Jose H. Zagal, Ruben Onate, Alexis Aspee, Ingrid Ponce
Summary: This study demonstrates that the chiral-induced spin selectivity effect can greatly enhance the electrocatalytic activity of iron phthalocyanine for the oxygen reduction reaction. By using chiral peptides to assemble FePc on a gold electrode surface, the handedness and length of the peptides can optimize the kinetics and thermodynamics of ORR. The D-enantiomer shows the highest electrocatalytic activity, shifting the onset potential close to the reversible potential of the O2/H2O couple.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Physical
Karina Munoz-Becerra, Francisco J. Recio, Ricardo Venegas, Jose H. Zagal
Summary: The electrocatalysis of the Hydrogen Evolution Reaction (HER) has been extensively studied on metal electrodes and alloys, particularly precious metals like Pt. However, recent research has focused on MN4-macrocyclic molecular HER catalysts to reduce the reliance on expensive Pt-based catalysts. These catalysts' activity can be modified by altering their molecular and electronic structures, and they can serve as models for the reaction. Many publications combine experiments and theory to analyze the influence of N4 ligands and the central metal on the electrocatalytic properties of these materials. The confinement of these catalysts on electrode surfaces is also discussed.
CURRENT OPINION IN ELECTROCHEMISTRY
(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)