Article
Chemistry, Physical
Jonas Mart Linge, Daniil Kozhemyakin, Heiki Erikson, Sergei Vlassov, Nadezda Kongi, Kaido Tammeveski
Summary: The study found that silver nanowires with a diameter of 35 nm exhibit high electrocatalytic activity in the oxygen reduction reaction (ORR) due to their elongated porous structure facilitating mass transport. Koutecky-Levich analysis confirmed that ORR proceeds via a 4-electron pathway.
Article
Chemistry, Multidisciplinary
Lele Cui, Bin Chen, Longshun Zhang, Chen He, Chen Shu, Hongyu Kang, Jian Qiu, Wenheng Jing, Kostya (Ken) Ostrikov, Zhenghua Zhang
Summary: This study demonstrates an anti-electrowetting carbon film electrode with self-sustained aeration, which is assembled using structurally discontinuously fractured conventional electrocatalyst films. It achieves highly selective and durable electrochemical two-electron oxygen reduction, providing a promising direction for developing cheap and scalable metal-free electrodes for industry-scale H2O2 electrosynthesis.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Zhiqin Deng, Chaoqun Ma, Shihai Yan, Jie Liang, Kai Dong, Tingshuai Li, Yan Wang, Luchao Yue, Yonglan Luo, Qian Liu, Yang Liu, Shuyan Gao, Juan Du, Xuping Sun
Summary: Mo doping is proposed to boost the 2e(-) ORR of TiO2 nanocrystallines, achieving a high Faradaic efficiency and large H2O2 yield. The catalytic mechanism is further revealed through density functional theory calculations.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Zhiqin Deng, Li Li, Yuchun Ren, Chaoqun Ma, Jie Liang, Kai Dong, Qian Liu, Yonglan Luo, Tingshuai Li, Bo Tang, Yang Liu, Shuyan Gao, Abdullah M. Asiri, Shihai Yan, Xuping Sun
Summary: In this study, Cu-doped TiO2 was reported as an efficient electrocatalyst for sustainable electrochemical synthesis of hydrogen peroxide. The Cu doping induced lattice distortion and the formation of oxygen vacancies and Ti3+ species, leading to improved selectivity and yield of hydrogen peroxide. Theoretical calculations revealed that Cu doping not only enhanced the electrical conductivity of TiO2, but also facilitated the oxygen reduction reaction process.
Article
Chemistry, Physical
Hongcen Yang, Fei Ma, Niandi Lu, Shuhao Tian, Guo Liu, Ying Wang, Zhixia Wang, Di Wang, Kun Tao, Hong Zhang, Shanglong Peng
Summary: By embedding transition metal single atoms (TM SAs) in g-C3N4 nanosheets (CNNS), the selectivity and activity for the 2e(-) ORR can be enhanced, leading to the production of H2O2. Ni0.10 SA/CNNS exhibits the best selectivity and highest yield among the TM SA/CNNS catalysts.
NANOSCALE HORIZONS
(2023)
Article
Nanoscience & Nanotechnology
Quanying Chen, Chaoqun Ma, Shihai Yan, Jie Liang, Kai Dong, Yonglan Luo, Qian Liu, Tingshuai Li, Yan Wang, Luchao Yue, Baozhan Zheng, Yang Liu, Shuyan Gao, Zhenju Jiang, Wei Li, Xuping Sun
Summary: In this study, Mn-doped TiO2 was used as an efficient electrocatalyst for highly selective H2O2 synthesis, showing low onset potential and high H2O2 selectivity. Density functional theory calculations revealed that Mn dopant improved the electrical conductivity and reduced the activation energy, leading to a highly efficient H2O2 production process. The significantly boosted catalytic performance can be attributed to the lattice distortion of Mn-doped TiO2 with a large amount of oxygen vacancies and Ti3+.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Shuhui Xu, Ruihu Lu, Kai Sun, Jialun Tang, Yaping Cen, Liang Luo, Ziyun Wang, Shubo Tian, Xiaoming Sun
Summary: In this study, a nitrogen and oxygen co-modified carbon nanotubes (N, O-CNTs) electrocatalyst with excellent H2O2 selectivity in a wide voltage range was successfully synthesized. It outperformed other carbon nanotube materials and the mechanism for its active sites and improvement of the 2-electron pathway was revealed through theoretical calculations.
Article
Chemistry, Applied
Yifan Zhao, Yoshifumi Kondo, Yasutaka Kuwahara, Kohsuke Mori, Hiromi Yamashita
Summary: Researchers have developed a hydrophobic TiO2 material that can catalytically synthesize H2O2 under visible light, which is economically advantageous. Separation of the generated H2O2 from the organic phase improves its stability, and the addition of 2,3-DN enhances visible light absorption and increases H2O2 production.
Article
Chemistry, Multidisciplinary
Tae Hwa Jeon, Bupmo Kim, Chuhyung Kim, Chuan Xia, Haotian Wang, Pedro J. J. Alvarez, Wonyong Choi
Summary: The study demonstrated the direct synthesis of an electrolyte-free aqueous solution of pure H2O2 using a photoelectrochemical system with solid polymer electrolyte and engineered electrodes, achieving continuous H2O2 synthesis over 100 hours. The system produced around 80 mM of H2O2 (electrolyte-free) with a faradaic efficiency of approximately 90%, setting a new record for pure H2O2 concentration obtained using PEC systems.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
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
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
Ao Yu, Guoming Ma, Longtao Zhu, Yajing Hu, Ruiling Zhang, Hsien-Yi Hsu, Ping Peng, Fang-Fang Li
Summary: Defects on carbon nanotubes can be used to promote catalytic reactions, and a method involving reduction of CO2 in Li2CO3-based molten salts has been developed to synthesize defect-rich CNTs in an eco-friendly and controllable manner. The degree of defects in CNTs can be adjusted by changing the applied electrolysis current, with lower current favoring the synthesis of CNTs with more defect sites. These defect-rich CNTs, particularly the ones synthesized under 300 mA cm(-2) electrolysis, exhibit superior performance in the oxygen reduction reaction compared to those synthesized under higher current densities.
Article
Chemistry, Multidisciplinary
Sang-Ho Chung, G. Hwan Park, Niels Schukkink, Hyoyoung Lee, N. Raveendran Shiju
Summary: The epoxidation of dicyclopentadiene (DCPD) was investigated on a series of TiO2 catalysts using hydrogen peroxide as an oxidant. DCPD derivatives find applications in various fields including polymers, pharmaceuticals, and pesticides. Ensuring selectivity for the desired product is crucial for these applications. Experimental and computational studies reveal the significant role of the crystalline phases of TiO2 on the formation of peroxo species and the selective epoxidation of the two different C=C double bonds in DCPD.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Sun Yun-Long, Huang Jun-Heng
Summary: Developing highly selective 2e(-) ORR catalysts has been challenging. In this study, we synthesized a graphene-supported titanium dioxide nanocomposite and achieved high selectivity (up to 90%) for converting oxygen into hydrogen peroxide.
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
(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
Chemistry, Multidisciplinary
Mohamed A. Ghanem, Ibrahim S. El-Hallag, Ahmed R. Tartour, Elsayed H. El-Mossalamy, Nouf H. Alotaibi
Summary: The electrochemistry of catechol in HClO4 was investigated using cyclic voltammetry, convolution-deconvolution voltammetry, and digital simulation methods. Two possible mechanisms for the electro-oxidation of catechol were proposed and evaluated.
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Etab M. Almutairi, Mohamed A. Ghanem, Abdulrahman Al-Warthan, Mufsir Kuniyil, Syed F. Adil
Summary: This study presents the synthesis of ultrathin copper oxide nanosheets (CuO-NS) using a versatile foam-surfactant dual template (FSDT) approach and demonstrates their electro-oxidation and sensing performance for hydrazine. The CuO-NS were prepared by chemical deposition of dissolved copper ions in a hexagonal surfactant template using hydrogen foam generated by a reducing agent. The CuO-NS exhibited superior oxidation performance compared to bare-CuO, with a high hydrazine sensitivity, low detection limit and a linear concentration range. Additionally, CuO-NS showed potential for practical hydrazine detection in water samples with good recovery, and the FSDT approach can be used to synthesize a wide range of nanomaterials for boosting electrochemical catalytic reactions.
Article
Chemistry, Analytical
Haotian Chen, Lina Wang, Frank Marken, Richard G. Compton
Summary: Current-time transients resulting from potential step measurements on electrodes covered with thin films are commonly used to differentiate between the diffusive transport mechanisms of the electroactive species, either through partitioning into membranes and subsequent transport or solely through pinholes. Machine learning (ML) is employed to perform user independent analysis on the transients to determine the most probable mechanism. The limitations and strengths of this approach are critically discussed.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Mabrook S. Amer, Prabhakarn Arunachalam, Mohamed A. Ghanem, Abdullah M. Al-Mayouf, Mark T. Weller
Summary: Photoelectrochemical (PEC) solar water splitting using semiconductor electrodes is a promising method for converting solar energy into hydrogen fuel. In this study, strontium titanium oxynitride (STON) with anion vacancies was prepared via solid phase synthesis and used as a photoelectrode for alkaline water oxidation. The PEC efficiency was improved by depositing a cobalt-phosphate (CoPi)-based co-catalyst on the surface of the STON electrode. The enhanced oxygen evolution kinetics and reduced surface recombination of photogenerated carriers contribute to the observed PEC enrichment. Additionally, the CoPi modification of perovskite-type oxynitrides presents a new avenue for developing efficient and stable photoanodes in solar-assisted water-splitting reactions.
Article
Nanoscience & Nanotechnology
Evaldo Batista Carneiro-Neto, Zhongkai Li, Ernesto Pereira, Klaus Mathwig, Philip J. J. Fletcher, Frank Marken
Summary: Ionic diode based devices or circuits, such as electroosmotic pumps or desalination processes, can be applied. By asymmetrically coating Aquivion ionomer over a Teflon film with a laser-drilled microhole, a cationic diode with a rectification ratio of 10-20 can be obtained. Experimental data is characterized using steady-state voltammetry, chronoamperometry, and electrochemical impedance spectroscopy, and computer simulation is used to reproduce and rationalize the diode switching process.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Zhongkai Li, John P. Lowe, Philip J. Fletcher, Mariolino Carta, Neil B. Mckeown, Frank Marken
Summary: This study investigates the tuning of electroosmotic water flow in molecularly rigid polymers with internal charges by adjusting the charge density. The results showed that the number of water molecules transported per anion increased with a lower degree of methylation. The study also demonstrated net water transport in a coupled anionic diode circuit.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Aya Fathy, Ashour M. Ahmed, Mohamed A. Ghanem, Hany Hamdy, Mohamed Shaban, Khaled M. H. Mohammed, Mohamed Rabia
Summary: Poly(m-toluidine) (PmT) is used as a high-performance electrode material in a supercapacitor with a PmT/(Co-Ni) core/shell composite as the electrode. The Co-Ni nanoneedles are prepared via a hydrothermal process and PmT nanoplatelets are grown on them through in-situ oxidation polymerization. The PmT/(Co-Ni) electrode exhibits a high specific capacitance of 308F/g at a current density of 0.6 A/g, as well as good stability with 98% retention of its initial capacitance after thousand cycles. The unique nanoplatelets/nanoneedles architecture and conductive PmT polymer contribute to the excellent electrochemical performance of the electrode.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Weaam A. Al-Sulmi, Mohamed A. Ghanem, Saba A. Aladeemy, Abdullah M. Al-Mayouf, Nouf H. Alotaibi
Summary: This study demonstrates a simple and novel approach to synthesize mesoporous nickel phosphate nanoparticles (meso-NiPO) via chemical deposition from a surfactant liquid crystal template. The meso-NiPO exhibits superior activity for urea oxidation reaction in alkaline solution, with high specific surface area and long-term stability. The method of chemical deposition from a surfactant liquid crystal template has the advantages of feasible synthesis of a wide range of nanomaterials for electrochemical energy production and storage systems.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Mohamed Zayed, Mohamed A. Ghanem, Mariam Taha, Hussein A. Elsayed, Ahmed Mehaney, Mohamed Shaban, Khaled M. H. Mohammed, Ashour M. Ahmed
Summary: This study investigates the performance of ZnO nanorods doped with Fe, Al, and Sn for hydrogen photo-production. The Fe-ZnO film exhibits the lowest energy band gap and the best photoelectrode performance.
JOURNAL OF SAUDI CHEMICAL SOCIETY
(2023)
Editorial Material
Chemistry, Physical
Frank Marken
Summary: The electrochemical conversion of carbon dioxide into high-value multicarbon products is desirable but complex in process design. Water activity may play a key role in tuning product yields in this reaction.
Article
Chemistry, Physical
Abdulrahman I. Alharthi, Maged N. Shaddad, Talal F. Qahtan, Mshari A. Alotaibi, Abdulaziz A. Alanazi, Prabhakarn Arunachalam
Summary: Photoelectrochemical water splitting using solar energy is an effective strategy for addressing fossil resource depletion and global warming. Researchers have discovered that the cooperative interaction between ZrO2 and Bi2S3 nanoparticles can significantly enhance the performance of nanostructured Bi2O3 electrodes, resulting in improved photocurrent density and applied bias photon-to-current efficiency. This finding opens up possibilities for the development of nanostructured electrode films with adjustable optical and electronic properties for various applications, such as solar cells, electrochemical energy storage, and PEC.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Thom R. Harris-Lee, Enrico Della Gaspera, Frank Marken, Jie Zhang, Cameron L. Bentley, Andrew L. Johnson
Summary: Aerosol-assisted chemical vapor deposition (AACVD) was used to fabricate highly nanostructured mixed anatase-rutile phase TiO2 using new and bespoke precursors. The precursor syntheses involved two steps and the suitability for AACVD was assessed using thermogravimetric analysis. The resulting TiO2 films showed exceptional OH- oxidation performance and promise for use in photoanodes for water splitting applications.
MATERIALS ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Saleh Omar ben Gubaer, Maged N. Shaddad, Prabhakarn Arunachalam, Mabrook S. Amer, Saba A. Aladeemy, Abdullah M. Al-Mayouf
Summary: The present work demonstrates the synergistic effect of Co-doping and vacuum-annealing on the electrochemical redox reactions of iron oxide films. Through a hydrothermal approach, a series of defect-rich iron oxy/hydroxide nanorod arrays were synthesized and cobalt doping was employed to enhance the electrocatalytic OER activity of the thin film catalysts. The results show that the as-deposited Co-doped FeOx NR catalyst exhibits significantly improved OER performance compared to the as-deposited Co-doped FeOOH NR catalysts, indicating the importance of Co doping and the defect-rich nature of FeOx nanorod catalysts in sustainable energy systems.
Article
Chemistry, Physical
Jose L. Bott-Neto, Thiago S. Martins, Osvaldo N. Oliveira, Frank Marken
Summary: This study presents a PEC platform based on TiO2 electrodeposition onto printed carbon electrodes, which eliminates the need for heat treatment. The resulting electrodes show higher photocurrents and improved sensitivity and selectivity for detecting ascorbic acid. The use of brookite TiO2 nanocrystals allows for the production of miniaturized devices for sensitive, selective PEC (bio)sensors.
APPLIED SURFACE 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)
