Article
Biochemistry & Molecular Biology
Huitian Yang, Hao Wu, Lei Yao, Siyan Liu, Lu Yang, Jieling Lu, Hongliang Peng, Xiangcheng Lin, Ping Cai, Huanzhi Zhang, Fen Xu, Kexiang Zhang, Lixian Sun
Summary: In this study, a non-precious-metal tris (Fe/N/F)-doped particulate porous carbon material was synthesized by a one-step process and showed good oxygen reduction reaction performance in an alkaline medium. The synthesized catalyst exhibited better stability and methanol resistance compared to commercial Pt/C.
Review
Chemistry, Inorganic & Nuclear
Maryam Kiani, Xiao Qing Tian, Wenxing Zhang
Summary: The development of non-precious nanomaterial-based electrocatalysts for polymer electrolyte membrane fuel cells is crucial for enhancing oxygen reduction reaction efficiency, stability, and cost-effectiveness. The use of fuel cells is favored due to their higher efficiency, cleanliness, and cost-effective power supply. Addressing the challenges in improving non-precious metal catalysts is essential for the future advancement of renewable energy technologies.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Physical
R. Sivaraman, Maria Jade Catalan Opulencia, Ali Majdi, Indrajit Patra, Mohammed Kadhem Abid, Ali Thaeer Hammid, Maryam Derakhshandeh
Summary: Quantum-chemical computations were used to calculate the thermodynamic variations of the potential reaction steps in the oxygen reduction reaction (ORR) of NiN3-Gr catalyst's active center. The consistency of adsorption energies for O-containing intermediates was observed. The advantageousness of following a 4-electron pathway compared to a 2-electron one was demonstrated by the great thermodynamic driving forces for reducing OOH. The results provide guidance for synthesis and selection of NiN3-Gr combinations for fuel cell applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Steffen Haller, Vladislav Gridin, Kathrin Hofmann, Robert W. Stark, Barbara Albert, Ulrike Kramm
Summary: Zinc-air batteries have advantages over lithium-ion technology in terms of utilizing earth-abundant elements, low cost, lightweight construction, and improved safety. Non-precious metal catalysts, including metal-nitrogen-carbon (MNC) for ORR and metal oxyhydroxides for OER, show promising results in improving the efficiency of these reactions in half-cell measurements. X-ray diffraction and Raman spectroscopy were utilized to characterize the catalysts, revealing their phase composition and performance in a zinc-air cell, demonstrating peak power density and charge-discharge gap after cycling.
Review
Chemistry, Physical
Qixing Du, Yanmei Gong, Muhammad Arif Khan, Daixin Ye, Jianhui Fang, Hongbin Zhao, Jiujun Zhang
Summary: This paper discusses the research progress in transition metal nitrides as electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in zinc-air batteries (ZABs). The surface/interface nanoengineering strategies and physical/chemical properties of TMNs-based electrocatalysts are emphasized. The challenges of TMNs-based materials as bifunctional air-cathode electrocatalysts in practical application are evaluated, and research guidelines are proposed.
GREEN ENERGY & ENVIRONMENT
(2022)
Article
Chemistry, Physical
Lin Li, Shuiyun Shen, Guanghua Wei, Junliang Zhang
Summary: In recent years, there have been increasing efforts to develop non-precious metal (NPM) catalysts with high activity and stability for the oxygen reduction reaction (ORR) to reduce costs. The hollow NPM electrocatalyst (Hemin-HD) fabricated using hemin as the precursor and NaCl as the template showed improved ORR activity in alkali solution compared to Hemin-D, and its performance was comparable to commercial Pt/C catalysts. The hollow structure of Hemin-HD allows for the dispersion of more active sites, enhancing the ORR activity.
ACTA PHYSICO-CHIMICA SINICA
(2021)
Article
Chemistry, Applied
Yuhan Wu, Jianhui Sun, Shixue Dou, Jingyu Sun
Summary: This article provides an overview of the production and application of hydrogen peroxide. It introduces the advantages of electrochemical reduction in H2O2 production compared to traditional methods and emphasizes the importance of preparing highly selective catalysts and constructing electrolysis devices in the electrosynthesis process. Furthermore, it discusses the key factors of electrode structure and device design, as well as the potential co-production combination with energy systems.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Review
Chemistry, Physical
Hongda Yu, Luming Wu, Baoxia Ni, Tiehong Chen
Summary: The development of efficient, stable, and economic electrocatalysts is crucial for the large-scale application of electrochemical energy conversion. Porous carbon-based non-precious metal electrocatalysts are considered as the most promising materials to replace costly Pt-based catalysts. The porous carbon matrix, with its high specific surface area and controllable structure, facilitates the dispersion of active sites and mass transfer, showing great potential in electrocatalysis.
Article
Electrochemistry
Guogang Xue, Jianjun Tian, Jun Bao, Dan Hu
Summary: Polymerizable ionic liquid was used to prepare Fe-N/C non-precious metal catalyst for ORR, showing promising catalytic performance. The material has potential to be a precursor for ORR catalyst without noble metal.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Chemistry, Physical
Patrick Teppor, Rutha Jager, Maarja Paalo, Anu Adamson, Meelis Harmas, Olga Volobujeva, Jaan Aruvali, Rasmus Palm, Enn Lust
Summary: Natural well-decomposed peat was used as a precursor for synthesizing non-platinum group metal-type oxygen electrocatalysts, with high oxygen evolution activity achieved through minimal treatment of the catalyst. It was found that changing the parameters of the peat carbonization procedure significantly influenced the oxygen evolution and reduction activities of the catalysts, while peak power densities of the catalysts correlated with several physical parameters. The study demonstrates the potential of fabricating advanced functional carbon materials for oxygen electrocatalysis from peat.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
R. Rohib, Eunjik Lee, Changki Kim, Hyunjoon Lee, Gu-Gon Park
Summary: In this study, a simple and eco-friendly synthesis method of Nb-based electrocatalysts was demonstrated using pulsed laser ablation in liquid and ammonia nitriding. The synthesized electrocatalyst samples had a nanoparticle size with a core-shell structure, showing improved electrical conductivity. The Nb4N5@NbOx/C_5h sample, heat-treated at 900 degrees C for 5 h, exhibited moderate onset potential and catalytic activity, with no degradation in oxygen reduction reaction performance over 10,000 potential cycles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Electrochemistry
Xuefeng Ren, Bihe Liu, Xingyou Liang, Yiran Wang, Qianyuan Lv, Anmin Liu
Summary: With the consumption of fossil fuels, energy and environmental issues have become increasingly prominent. Fuel cells, as a new energy source, have advantages such as high efficiency and environmental friendliness, but slow cathode kinetics have hindered their development. Non-precious metal catalysts are widely recognized for their affordability and stability.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Ximing Qu, Yu Han, Youhu Chen, Jinxia Lin, Guang Li, Jian Yang, Yanxia Jiang, Shigang Sun
Summary: A rational stepwise pyrolysis strategy was proposed for stabilizing isolated Fe-N-X sites on highly graphitized N-doped carbon supports. The high graphitization degree of the NC support derived from a harsh thermal treatment at 1100 degrees Celsius significantly enhanced the stability of the Fe-N-X/C catalyst, enabling strong antioxidant ability in both ORR and fuel cell tests.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Nanoscience & Nanotechnology
Gui-Rong Zhang, Cong Yong, Liu-Liu Shen, Hui Yu, Kai Brunnengraeber, Timo Imhof, Donghai Mei, Bastian J. M. Etzold
Summary: Non-precious metal catalysts have potential to replace Pt-based catalysts for the oxygen reduction reaction (ORR), but their catalytic activity needs improvement. This study presents a simple method to enhance the performance of zeolitic imidazolate framework-derived carbon (ZDC) for ORR by incorporating a small amount of ionic liquid (IL). The IL fills the micropores of ZDC, improving the utilization of active sites that were initially inaccessible due to surface wetting limitations.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Weiwei Yang, Yu Bai, Lin Peng, Meixiu Qu, Kening Sun
Summary: Transition metal oxides have been extensively studied for oxygen evolution reaction (OER). This study proposes the strategy of dual-defect engineering to enhance the catalytic activity and stability of NiFe2O4 by filling the oxygen vacancies with phosphorus atoms. The filled P atoms improve conductivity, intrinsic activity, and cycling stability of the material. The derived NiFe2O4-Vo-P exhibits fascinating activity and good durability, shedding light on the design of high-performance transition metal oxide catalysts through defect regulation in the future.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yang Hu, Jens Oluf Jensen, Poul Norby, Lars Nilausen Cleemann, Feng Yang, Qingfeng Li
Summary: This study presents a comprehensive understanding of the synthesis mechanism of platinum-rare earth metal (Pt-RE) nanoalloys, achieved through systematic investigations of the chemical processes at different stages and the evolution of intermediate products. This paves the way for optimizing synthesis procedures and manipulating the method to synthesize Pt-RE alloy materials with desired structures and properties.
CHEMISTRY OF MATERIALS
(2021)
Article
Engineering, Chemical
Ruihong Liu, Yu Dai, Jinyang Li, Xiong Chen, Chao Pan, Jingshuai Yang, Qingfeng Li
Summary: New high temperature proton exchange membranes based on PVC and APIm were fabricated by a solution casting method, showing excellent thermal stability, proton conductivity, and mechanical strength. These membranes demonstrate technical feasibility for high temperature proton exchange membrane fuel cells.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Ruiqing Wang, Xiaolan Cao, Sheng Sui, Bing Li, Qingfeng Li
Summary: In this study, the controlled growth of platinum nanowires in a carbon matrix has been achieved to reduce the Pt loading. The effects of formic acid concentration and reaction temperature on the morphology, size, and electrochemical performance of Pt nanowires were investigated. The optimized Pt nanowires electrode exhibited a 79% higher power density compared to conventional Pt/C electrodes, showing promising potential for novel nanostructures in catalyst applications.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2022)
Article
Electrochemistry
Yang Hu, Jens Oluf Jensen, Patrick Bretzler, Lars Nilausen Cleemann, Jianan Yu, Qingfeng Li
Summary: This work investigated the stability of the Pt/C reference catalyst for the oxygen reduction reaction, establishing a reliable benchmark under controlled conditions and identifying the influence of experimental errors on the test results. The proposed experimental procedure could serve as a general reference for determining the stability of electrocatalysts for different electrochemical systems.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Chenming Fan, Pukang Wen, Guoqing Li, Guomin Li, Jingjiu Gu, Qingfeng Li, Bing Li
Summary: This study introduces a novel and facile strategy for the chemical synthesis of Pt5La nanoalloys, which show significant improvement in ORR and MOR performances compared to the commercial JM-Pt/C catalyst.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Marijn A. Blommaert, David Aili, Ramato Ashu Tufa, Qingfeng Li, Wilson A. Smith, David A. Vermaas
Summary: Bipolar membranes (BPMs) are versatile in energy conversion technologies, but current commercial BPMs are not optimized for different applications. Future BPMs require highly conductive layers, fast water dissociation kinetics, long lifetime, and low ion crossover for practical applications.
ACS ENERGY LETTERS
(2021)
Article
Electrochemistry
Yaping Jin, Xuefu Che, Yixin Xu, Jianhao Dong, Chao Pan, David Aili, Qingfeng Li, Jingshuai Yang
Summary: Development of high temperature polymer electrolyte membranes is crucial for advanced energy conversion and storage technologies. In this study, a new imidazolium type ionic liquid was synthesized and used to modify a polymer membrane, resulting in improved solubility and proton conductivity. The modified membrane exhibited excellent performance at high temperature, achieving a high power density.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Review
Materials Science, Multidisciplinary
Xuan Liu, Gaoyang Liu, Jilai Xue, Xindong Wang, Qingfeng Li
Summary: This paper reviews the hydrogen technological chain in the framework of renewable energy, including water electrolysis, hydrogen storage, and fuel cell technologies. Fuel cell technologies are at the threshold of commercial markets with verified technical readiness, but still face limitations such as unavailable hydrogen infrastructure, durability, and competitive costs.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Chemistry, Physical
Yongfang Chen, Kobra Azizi, Wenjing Zhang, David Aili, Soren Primdahl, Lars N. Cleemann, Hans A. Hjuler, Qingfeng Li
Summary: The use of thin polybenzimidazole membranes in high-temperature polymer electrolyte membrane fuel cells is investigated. Thin membranes with a thickness of 10-40 μm are prepared and characterized. Acid doping improves the conductivity of the thin membranes and reduces ohmic resistance. However, the use of thin membranes results in slightly lower open-circuit voltages and poses challenges in acid inventory.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Hongying Tang, David Aili, Ramato Ashu Tufa, Mikkel Rykaer Kraglund, Qiqi Wu, Chao Pan, Lars N. Cleemann, Qingfeng Li
Summary: The study focuses on the anion conductivity of cation exchange membranes used for electrochemical reduction of CO2 in alkaline media, finding that the conductivity of hydroxide and bicarbonate ions is crucial for the process.
SOLID STATE IONICS
(2022)
Article
Chemistry, Multidisciplinary
Zhe Li, Fangning Liu, Chuanxia Chen, Yuanyuan Jiang, Pengjuan Ni, Ningning Song, Yang Hu, Shibo Xi, Minmin Liang, Yizhong Lu
Summary: This study demonstrates that the oxidase-like activity of single-atom Co catalysts greatly depends on their local N coordination around the Co catalytic sites. We synthesized a series of Co single-atom catalysts with different nitrogen coordination numbers (Co-Nx(C), x = 2, 3, and 4) and demonstrated that the oxidase-like activity of single-atom Co catalysts could be effectively tailored by fine-tuning the N coordination. Among the studied single-atom Co catalysts, the Co-N3(C) with three-coordinate N atoms shows the optimum oxygen adsorption structure and robust reactive oxygen species (ROS) generation, thus presenting the preferable oxidase-like catalytic activity. This work facilitates the future development of rational nanozyme designs for targeting reactions at the atomic level.
Article
Multidisciplinary Sciences
Hongying Tang, Kang Geng, David Aili, Qing Ju, Ji Pan, Ge Chao, Xi Yin, Xiang Guo, Qingfeng Li, Nanwen Li
Summary: The use of catalyst binders based on polymers of intrinsic microporosity has addressed the challenges faced by phosphoric acid doped polybenzimidazole membranes fuel cells, achieving low Pt loading and high fuel cell performance.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Kun Wang, Haojie Liu, Luyao Zhang, Boyuan Yu, Yang Hu, Feng Yang
Summary: Studying the nucleation and dynamic evolution of nanocrystals is crucial for their use as catalytic materials. For intermetallic nanocrystals, their catalytic performance is closely related to their unique geometrical and electronic structures. However, there is currently a lack of understanding about how intermetallic nanocrystals nucleate and evolve under harsh synthesis conditions. In this study, by regulating the nucleation and growth processes, twinned Pt2Mo intermetallic nanocrystals were successfully prepared. The results showed that the heating rate and annealing time played key roles in the formation of twinned interfaces. Furthermore, the study also revealed the unfavorable effect of long-term annealing on twinned nanoparticles, as they transformed into untwinned Pt2Mo nanoparticles. These findings are important for designing catalyst interface structures at the atomic level.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Review
Chemistry, Multidisciplinary
Nedjeljko Seselj, David Aili, Sanser Celenk, Lars N. Cleemann, Hans Aage Hjuler, Jens Oluf Jensen, Kobra Azizi, Qingfeng Li
Summary: To address the challenges of climate change and increasing energy demand, hydrogen and fuel cell technologies, particularly the polymer electrolyte membrane type, are seen as potential solutions. Research on material degradation and mitigation is essential to improve the reliability and lifetime of this technology.
CHEMICAL SOCIETY REVIEWS
(2023)
Article
Chemistry, Physical
Shunfa Zhou, Guoli Zheng, Feng Ji, Jiatang Wang, Zhao Liu, Jiawei Shi, Jing Li, Yang Hu, Chengwei Deng, Liyuan Fan, Weiwei Cai
Summary: In this study, a Ni-based porous supramolecular framework was designed as a carbon precursor, and a Ni@NiNx-N-C catalyst with excellent bifunctional electrocatalytic activity was successfully synthesized. The unique hetero-porous structure, high graphitization degree, and large specific surface area of the catalyst contributed to its outstanding performance in zinc-air batteries, showing excellent power output and stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(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)