Article
Energy & Fuels
Ravi Nivetha, Jayasmita Jana, Santhosh Ravichandran, Huynh Ngoc Diem, Tran Van Phuc, Jin Suk Chung, Sung Gu Kang, Won Mook Choi, Seung Hyun Hur
Summary: 2D bimetallic MOFs (M-Ni, Zn, Co, and Cu) prepared by solvothermal and exfoliation condition exhibit excellent electrochemical performance, with high surface area and abundant active sites that can accelerate reaction kinetics. They have low overpotentials for hydrogen and oxygen evolution reactions and high specific capacitances when used as supercapacitor electrodes.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Xiaodong Chen, Shoufu Cao, Xiaojing Lin, Xiaofei Wei, Zhaojie Wang, Hongyu Chen, Chengcheng Hao, Siyuan Liu, Shuxian Wei, Daofeng Sun, Xiaoqing Lu
Summary: In this study, a one-dimensional electrocatalyst with excellent hydrogen evolution reaction (HER) activity in a wide pH range was designed through the modulation of electronic structure and geometric configuration. The catalyst, composed of molybdenum trioxide doped molybdenum nickel alloy supported by copper nanowires (MoO3-MoNi4@Cu NWs), showed enhanced H2O adsorption and dissociation due to the up shift of the d-band center in MoNi4 facilitated by electron transfer from Cu NWs. Additionally, the introduction of amorphous MoO3 created a unique geometric configuration on MoNi4 for accelerated H* transfer via hydrogen-bond and hydrogen spillover. This work provides a synergistic approach for constructing HER pathways and promotes further investigations in versatile electrocatalysis involving H2O or H*.
Article
Chemistry, Multidisciplinary
Yiming Jiang, Juncai Leng, Shiqi Zhang, Tingyi Zhou, Mingxuan Liu, Shuoming Liu, Yahui Gao, Jianwei Zhao, Lei Yang, Li Li, Wei Zhao
Summary: A novel Ir@Rhene heterojunction electrocatalyst is successfully synthesized by epitaxially confining ultrasmall and low-coordinate Ir nanoclusters on the ultrathin Rh metallene, resulting in the formation of Ir/IrO2 Janus nanoparticles. The heterojunctions exhibit excellent alkaline hydrogen evolution reaction (HER) activity, with an overpotential of only 17 mV at 10 mA cm(-2) and an ultralow Tafel slope of 14.7 mV dec(-1). Both structural characterizations and theoretical calculations reveal that the Ir@Rhene heterointerfaces induce charge density redistribution, leading to an increase in electron density around the O atoms in the IrO2 site and consequently lowering the water dissociation energy. Furthermore, the dual-site synergetic effects between IrO2 and Ir/Rh interface facilitate interfacial hydrogen spillover, effectively avoiding steric blocking and accelerating the alkaline HER kinetics.
Article
Nanoscience & Nanotechnology
Keying Chen, Debmalya Ray, Michael E. Ziebel, Carlo A. Gaggioli, Laura Gagliardi, Smaranda C. Marinescu
Summary: Metal-organic frameworks (MOFs) are being explored as electrocatalysts for small molecule activation, with two-dimensional dithiolene-based MOFs showing high activity in hydrogen evolution reaction (HER). A new three-dimensional dithiolene-based MOF exhibited good catalytic activity, and an activation process was found to enhance its catalytic performance in controlled potential electrolysis experiments.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Energy & Fuels
Ha Huu Do, Quyet Van Le, Tuan Van Nguyen, Kim Anh Huynh, Mahider Asmare Tekalgne, Vy Anh Tran, Tae Hyung Lee, Jin Hyuk Cho, Mohammadreza Shokouhimehr, Sang Hyun Ahn, Ho Won Jang, Soo Young Kim
Summary: A facile strategy was developed to fabricate efficient catalysts by incorporating amorphous molybdenum sulfide (MoSx) and Ni-metal-organic framework (MOF)-74 via a solvothermal process, resulting in excellent hydrogen generation performance in acidic media. The stability of the catalyst was maintained for over 2000 cycles with a slight shift in performance, indicating that the MoSx/Ni-MOF-74 composite is a promising candidate for non-expensive catalysts for hydrogen production using the electrochemical method.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Ha Huu Do, Quyet Van Le, Mahider Asmare Tekalgne, Anh Vy Tran, Tae Hyung Lee, Sung Hyun Hong, Sang Mok Han, Sang Hyun Ahn, Young Ju Kim, Ho Won Jang, Soo Young Kim
Summary: Metal-organic frameworks (MOFs) are crystalline porous materials used for energy-related applications, serving as efficient catalysts for hydrogen evolution reactions (HERs). The modification of Co-based MOFs into MoSx can significantly enhance their catalytic activity, offering hope for replacing noble metals with high-performance catalysts in the future.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Environmental Sciences
Sivalingam Gopi, Selvamani Vadivel, Leandro M. C. Pinto, Asad Syed, Murugavel Kathiresan, Kyusik Yun
Summary: In this study, a hydrothermal method was used to prepare a porous organic polymer, which was subsequently derivatised with metal infusion under high temperature and calcination conditions to obtain pristine and metal-decorated porous carbons. These electrocatalysts showed significant activity in water splitting and excellent stability, with Ni-ANIPOP-700 exhibiting lower overpotential and Tafel slope, indicating lower energy requirements for overall water splitting. Gas chromatography was used to analyze the electrolyzed products.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Physical
Shumin Wang, Yi Zhang, Xiaoyang Deng, Zizai Ma, Hefeng Yuan, Jinping Li, Xiaoguang Wang
Summary: In this study, NiS2 nanoparticles with ellipse-like topography were fabricated via hydrothermal and sulfurization treatment. The unique loose stacking topographic architecture of the nanoparticles resulted in more exposed active sites, lower contact resistance, faster ion diffusion, and electron transfer. The NiS2-400 electrode exhibited excellent performance in the hydrogen evolution reaction (HER) with low overpotentials and good electrochemical stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Kai Wang, Jinhui Zhou, Mingzi Sun, Fangxu Lin, Bolong Huang, Fan Lv, Lingyou Zeng, Qinghua Zhang, Lin Gu, Mingchuan Luo, Shaojun Guo
Summary: We report a new design of Cu-doped Ru/RuSe2 heterogeneous nanosheets (NSs) with optimized H and H2O adsorption strength for highly efficient HER catalysis in alkaline media. The Cu-doped Ru/RuSe2 NSs exhibit a small overpotential, low Tafel slope, and high turnover frequency for HER, making them among the best catalysts in noble metal-based electrocatalysts toward HER. This work demonstrates that heterogeneous interface modulation opens up a new strategy for the designing of more efficient electrocatalysts.
ADVANCED MATERIALS
(2023)
Article
Electrochemistry
Wenhui Fang, Jing Wang, Ye Hu, Xiaoqing Cui, Ruifeng Zhu, Yuhua Zhang, Chaochao Yue, Jiaqi Dang, Wei Cui, Hong Zhao, Zengxi Li
Summary: This study presents a novel hybrid electrocatalyst with excellent performance for hydrogen evolution reactions (HER) and oxygen evolution reactions (OER) in alkaline solution, attributed to highly dispersed iron/cobalt species, sheet structure with high porosity, nitrogen-doped carbon and high conductivity of rGO. The improvement in activity is also linked to the balance of adsorption/desorption of intermediates and increased electronic states near the Fermi level.
ELECTROCHIMICA ACTA
(2021)
Review
Materials Science, Multidisciplinary
Xiao-Tong Wang, Xiao-Feng Lin, Ding-Shan Yu
Summary: Metal-containing covalent organic frameworks (MCOFs) with abundant single-atom metal sites can effectively respond to various vital reactions. The advent of MCOFs provides a platform for the establishment of model catalysts with highly repetitive structure and design flexibility to develop highly selective and active photo/electrocatalysts.
Article
Nanoscience & Nanotechnology
Jun Shen, Qin Li, Zhenyu Cai, Xiaolin Sun, Jingquan Liu
Summary: This study innovatively designs a general strategy to prepare controlled MOF-based three-dimensional nanoparticle-array-structured catalysts with self-support and well-orientation. The prepared catalyst exhibits excellent performance, including synergistic effect, high specific surface area, fast electron transport, more exposed active sites, and enhanced electrochemical stability, making it a potential industrial water-splitting catalyst for hydrogen production. This study presents a new line for the preparation of more nanoscale electrocatalysts based on MOF.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Man Zhang, Di Hu, Zhenhao Xu, Biying Liu, Mebrouka Boubeche, Zuo Chen, Yuchen Wang, Huixia Luo, Kai Yan
Summary: Conductive metal-organic frameworks (MOFs) are considered ideal electrocatalysts for the hydrogen evolution reaction (HER) due to their high metal atom utilization. In this study, three types of porous MOFs were synthesized with large specific surface areas by regulating the metal center, showing high performance in the HER process. The Ni-BTC material exhibited the best performance, surpassing previously reported MOFs catalysts in terms of overpotential, Tafel slope, charge transfer resistance, electrochemical active surface area, and turnover frequency.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Review
Chemistry, Physical
Haifang Shen, Hao Li, Zhensheng Yang, Chunli Li
Summary: The hydrogen spillover effect (HSPE) plays a significant role in heterogeneous catalysis and hydrogen storage, influencing the properties and performance of porous nanomaterials as well as multiphase catalytic reactions. Recent advancements in characterization techniques have provided valuable insights into understanding the HSPE.
GREEN ENERGY & ENVIRONMENT
(2022)
Review
Chemistry, Physical
Haifang Shen, Hao Li, Zhensheng Yang, Chunli Li
Summary: The hydrogen spillover effect (HSPE) is an important interfacial phenomenon in heterogeneous catalysis and hydrogen storage, influencing the performance of porous nanomaterials. Advanced characterization techniques have improved our understanding of the HSPE, leading to insights into its impact on hydrogen storage performance and catalysis. This review discusses the potential, opportunities, and challenges in the research area of hydrogen spillover.
GREEN ENERGY & ENVIRONMENT
(2022)
Article
Chemistry, Analytical
Fang Li, Anqi Zhao, Zimu Li, Yachao Xi, Jianming Jiang, Jianbo He, Jue Wang, Hua Cui
Summary: In this study, multifunctional hydrogel beads with intense and multicolor chemiluminescence (CL) were successfully prepared and applied for label-free CL imaging immunoassays. Two different types of hydrogel beads were synthesized, both exhibiting high stability and easy operability. The hydrogel bead-based immunoassay method showed high sensitivity and specificity in the determination of acute myocardial infarction (AMI) biomarkers, with linear ranges and low detection limits. The results demonstrate the potential of these hydrogel beads as universal platforms for a wide range of CL immunoassays.
ANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Zhao-Bin Yan, Fei-Fei Huang, Jun-Qing Shi, Fang Li, Bing Li, Zhen-Guo Guo, Jian-Hui Xie, Jian-Bo He
Summary: This study demonstrates the successful application of bipolar electrochemistry to deposit lateral gradient polypyrrole films as a catalyst matrix for ethanol oxidation. The gradient film shows varying morphologies and a wettability gradient, with superabsorbent property in the middle portion. The excellent catalytic activity is attributed to the outstanding properties of a specific zone along the gradient film in both water absorption and electrical conductivity.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Jing Li, Zhi-Yang Wang, Ning Deng, Chao-Xiong Li, Zhen-Guo Guo, Jian-Bo He
Summary: This work presents a coupled procedure of direct electrodeposition and in situ chemical transformation for synthesizing a nickel-iron-sulfur (Ni-Fe-S) composite catalyst. The prepared catalyst exhibits high catalytic performance for both hydrogen and oxygen evolution reactions with good stability. It suggests that in situ chemical synthesis within a porous conductive polymer coating is a promising approach for preparing high efficiency electrocatalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Sheng-Ying Su, Er-Mei Li, Chao-Xiong Li, Bing Li, Fang Li, Jian-Bo He
Summary: This study demonstrates the self-driven droplet transport on a gradient surface formed by the bipolar electrochemical deposition of copper oxide. The modified microcolumns with a wettability gradient enable water droplets to move spontaneously towards the more hydrophilic direction.
Article
Green & Sustainable Science & Technology
Meng-Jie Zhao, Er-Mei Li, Ning Deng, Yingjie Hu, Chao-Xiong Li, Bing Li, Fang Li, Zhen-Guo Guo, Jian-Bo He
Summary: In this study, a coupled procedure of indirect electrodeposition and in situ electrochemical activation was used to synthesize a NiMo@Ni(OH)(2)MoOx composite coating. The resulting catalyst coating exhibited comparable or even superior hydrogen evolution reaction (HER) activity to Pt-based electrocatalysts in both acidic and alkaline solutions. This work provides a facile and unique method for preparing highly active and industrially attractive electrocatalysts.
Article
Chemistry, Analytical
Fang Li, Yachao Xi, Jianming Jiang, Hao Peng, Bing Li, Jianbo He, Jiangnan Shu, Hua Cui
Summary: Graphitic carbon nitride (g-CN) with wavelength-tunable electrochemiluminescence (ECL) emission is synthesized in this study through the condensation of melamine using o-fluorobenzoic acid as a regulation reagent. The porous structure and nitrogen defects of the synthesized g-CN enable wavelength-tunable multicolor ECL emissions. A multicolor ECL sensing array is proposed for the discrimination of polyphenols using g-CN and porous g-CN as sensing materials. The study provides a simple strategy to adjust the ECL wavelength of g-CN and presents a simple way to fabricate multicolor ECL sensing array, with great potential for multiplexed analysis and multicolor ECL imaging sensing.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Fang Li, Jianming Jiang, Hao Peng, Chaoxiong Li, Bing Li, Jianbo He
Summary: A simple nanozyme-based colorimetric sensor array was developed for the identification and detection of pesticides. The sensor array can distinguish different pesticides and obtain specific colorimetric responses and fingerprint-like patterns. This research has important application potential in food safety and environmental protection fields.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Organic
Xu Zhao, Chenrui Fan, Jianbo He, Yunfei Luo
Summary: Alkynyl chlorides were discovered to be novel electrophiles, capable of forming a single regioisomer of [3+2] annulation adducts with cyclic ketimines through rhodium catalysis. The alkenyl chloride moiety in the products offered a valuable functional handle for diverse transformations. Therefore, this research not only provided a synthetic protocol for obtaining unsymmetrically substituted indenyl amines but also presented a highly divergent solution for decorating the substituting group through postmanipulation of the chloride.
Article
Green & Sustainable Science & Technology
Meng-Jie Zhao, Qian He, Ting Xiang, Hua-Qin Ya, Hao Luo, Shanhong Wan, Jun Ding, Jian-Bo He
Summary: This study developed a decoupled alkaline water electrolysis system that does not require changing the structure of industrial electrolyzers. By using a wireless bipolar electrode to replace conventional ion membranes, the system achieved complete blocking of gas crossover and ion transfer between the hydrogen and oxygen chambers, enabling continuous electrolysis of high-purity hydrogen. This automatic bipolar decoupling scheme is an important step towards industrial implementation of decoupled water electrolysis technology.
Article
Electrochemistry
Er-Mei Li, Li Zhu, Chao-Xiong Li, Ling-Jun Shi, Bing Li, Fang Li, Ning Deng, Jian-Bo He
Summary: The function and mechanism of stannous sulfate as an additive in positive lead pastes of lead-acid batteries is unclear and requires further study. This research investigates the effects of tin additives on positive electrode performance under controlled experimental conditions. The results show that tin additives inhibit the transformation between PbSO4 and PbO2, leading to a decrease in charge/discharge capacities with increasing tin content. Therefore, the use of stannous sulfate in positive lead pastes of lead-acid batteries is not supported.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Chemistry, Physical
Zhenzhen Yang, Yuhan He, Pengfei Tang, Chenhui Xu, Genlei Zhang, Jianbo He
Summary: A 3D flower-like MoS2 microsphere incorporating oxygen is used as a bifunctional catalyst for the effective conversion of fructose to 2,5-diformylfuran (DFF), achieving high DFF yields. The catalyst exhibits both acidity and oxidability, promoting the dehydration of fructose to HMF and the aerobic oxidation of HMF to DFF, respectively. The MoS2 catalyst shows excellent stability, maintaining its activity after five consecutive reaction runs.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Jianhui Xie, Yijun Li, Denggen Nie, Leiyu Wang, Jing Chen, Bing Li, Jian-Bo He, Zhenguo Guo, Tai-Chu Lau
Summary: This study investigates the enhancement of semiconductor activity by anchoring CdS quantum dots on an N-doped carbon support with trace ruthenium dispersed as a cocatalyst. The experimental results demonstrate that the Ru/NC/CdS-5 catalyst with low ruthenium loading exhibits the highest photocatalytic activity and significantly improves hydrogen production rate.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Zhenzhen Yang, Yuhan He, Pengfei Tang, Bangchong Zhu, Genlei Zhang, Jianbo He
Summary: In this study, a carbon-supported molybdenum carbide catalyst was synthesized and found to be highly active for the conversion of 5-hydroxymethylfurfural and fructose to 2,5-diformylfuran. The catalyst exhibited high stability and could be reused without significant loss of activity.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Shan Wu, Di Wu, Dawei Zhang, Wenhong Liu, Hao Luo, Jianbo He, Qingchun Yang, Zhiwei Li, Ruiping Liu
Summary: The composite material with cobalt-nitrogen-doped carbon and molybdenum disulfide nanosheets as the host for the oxygen cathode improves the performance of lithium-oxygen batteries. The synergistic effect between the components promotes the formation and decomposition of Li2O2, enhances reaction kinetics, and extends battery life.
ENERGY & ENVIRONMENTAL MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Jianhui Xie, Bing Li, Huijing Liu, Yijun Li, Jian-Bo He, Yanzhen Zheng, Kai-Chung Lau, Tai-Chu Lau
Summary: The study investigated the kinetics and mechanisms of ferrate oxidation on 4-alkylbenzenesulfonates using UV/Vis spectrophotometry. The results indicated that [Fe(O)(3)(OH)](-) is two orders of magnitude more reactive than [FeO4](2-) and is the predominant oxidant in neutral and slightly alkaline solutions. Additionally, a hydrogen atom transfer (HAT) mechanism was proposed for the reactions between [Fe(O)(3)(OH)](-) and 4-alkylbenzenesulfonates.
DALTON TRANSACTIONS
(2021)
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)