Article
Chemistry, Physical
Iosif Mangoufis-Giasin, Lukas Fusek, Tian Yang, Peyman Khanipour, Olaf Brummel, Jorg Libuda, Karl J. J. Mayrhofer, Federico Calle-Vallejo, Ioannis Katsounaros
Summary: This study explores the oxidation of 2-propanol in alkaline solutions on different noble metal electrodes. It is found that the reaction is selective to acetone, and C-C bond breaking and the formation of adsorbed CO do not occur. The onset potential increases with Rh < Pt < Pd < Au, correlating with the adsorption energy of acetone. The rate of oxidation decays under potentiostatic conditions, and at high overpotentials, the reaction is limited by oxide formation. The research suggests a broader range of materials for efficient anodes in 2-propanol fuel cells, not limited to platinum-based electrodes.
Article
Chemistry, Multidisciplinary
Aigerim Galyamova, Richard M. Crooks
Summary: The model of nanoparticle-mediated electron transfer across insulating thin films proposed by Allongue and Chazalviel in 2011 and its breakdown under specific electrochemical conditions when the medium between conductors is an n-type semiconductor are summarized in the article. Experimental results showed a contradiction with the model as CO electrooxidation did not occur in the presence of n-type semiconductor medium, which was not explained within the context of the original model.
Article
Chemistry, Multidisciplinary
Evgeniia M. Khairullina, Ilya I. Tumkin, Daniil D. Stupin, Alexandra Smikhovskaia, Andrey S. Mereshchenko, Alexey Lihachev, Andrey V. Vasin, Mikhail N. Ryazantsev, Maxim S. Panov
Summary: The influence of Ni microstructure morphology modified with different metals on cell biocompatibility and non-enzymatic glucose detection was investigated. It was found that Ni-Pt electrodes showed better glucose detection performance, while Ni-Au electrodes were more favorable for cell adhesion.
Article
Engineering, Chemical
Jonathan M. Amezquita-Ortiz, Heriberto Alcocer-Garcia, Gabriel Contreras-Zarazua, Javier Fontalvo, Juan G. Segovia-Hernandez
Summary: The purification of acetone is a critical stage in its production process requiring a large amount of energy. Research suggests that in systems with interconnection flows, the magnitudes of these flows have a direct impact on energy consumption, with lower values leading to reductions while higher values have a negative impact. Intensified systems show improved control properties compared to conventional designs, with the thermally coupled system achieving the best results in terms of energy savings and CO2 emission reduction.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Rambabu Yalavarthi, Olivier Henrotte, Stepan Kment, Alberto Naldoni
Summary: The use of metal composites based on plasmonic nanostructures combined with catalytic counterparts has shown promise in plasmon-enhanced electrocatalysis. This study explores the effect of surface morphology, size, and anchored site of Pd catalysts on plasmonic metasurfaces for formic acid electro-oxidation reaction. The results demonstrate that site-selective deposition of Pd nanoparticles enhances catalytic activity and reduces CO poisoning on the Pd surface.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Analytical
Omer Faruk Er, Berdan Ulas, Omruye Ozok, Arif Kivrak, Hilal Kivrak
Summary: In this study, a highly active catalyst, 6B, was synthesized for hydrazine fuel cells. It exhibited superior performance in hydrazine electrooxidation reactions and was optimized for electrode preparation using response surface methodology. The modified electrode with 6B showed reduced charge transfer resistance, indicating its potential as a cost-effective alternative to Pt, Pd, and Au catalysts.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Huong Doan, Thiago Morais, Nino Borchtchoukova, Yair Wijsboom, Ronit Sharabi, Marian Chatenet, Gennadi Finkelshtain
Summary: The study indicates that monometallic catalysts are more susceptible to reversible poisoning and irreversible degradation at low potentials compared to bimetallic catalysts. Monometallic PGM/C experiences significant reversible poisoning and irreversible degradation, while bimetallic Pd-Ni/C exhibits minimal loss of ECSAPGM and HOR activity, making it less affected by carbon corrosion and CO-like species poisoning.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Review
Energy & Fuels
Matthew Brodt, Karsten Mueller, Jochen Kerres, Ioannis Katsounaros, Karl Mayrhofer, Patrick Preuster, Peter Wasserscheid, Simon Thiele
Summary: The 2-propanol fuel cell offers advantages over methanol fuel cells in terms of high voltage, reduced fuel crossover, and a benign toxicological fuel profile. Recent research has shown compatibility between 2-propanol fuel cells and LOHC systems, which can avoid high energy costs associated with dehydrogenation in hydrogen LOHC logistics.
Article
Chemistry, Physical
Xiao-Di Tang, Yi-yang Wang, Chao-Yang Wang, Lei Yuan, Yong Yi
Summary: In this study, a platinum-bismuth alloy catalyst (PtBi@CA) was synthesized by a one-step reduction method without the use of structure directing agents and stabilizers. The PtBi@CA(50-50) catalyst exhibited the smallest crystallite size and achieved high peak current density and pseudo-steady current density of 64.336 mA/cm2 and 0.096 mA/cm2, respectively, which were 11.22 times and 1.85 times higher than those of the most advanced commercial carbon-supported platinum catalysts (Pt/C). This method offers a simple and feasible approach to significantly reduce the usage of precious metals and shows great potential in the synthesis of anode electrocatalysts for direct ethanol fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Xiaomin Meng, Tiantian Zeng, Siyuan Ma, Linwei Zheng, Haibo Chen, Weiyong Yuan, Lian Ying Zhang
Summary: In this study, surface nitrided PdCu nanosheets were synthesized and found to exhibit highly enhanced catalytic activity and stability for ethanol oxidation. The improved performance can be attributed to the combined effects of introduced Cu and surface nitridation, which facilitate charge transfer and suppress CO poisoning.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Physical
Sunjin Park, Diana Shorova, Hansung Kim
Summary: The mechanism of NaCl poisoning in PEMFCs depends on the operating cell voltage, with different poisoning mechanisms observed at 0.6V and 0.9V. At 0.6V, performance degradation is attributed to blockage of catalyst active sites by Cl-, while at 0.9V, Cl--induced dissolution of Pt catalyst prevents performance recovery.
JOURNAL OF POWER SOURCES
(2022)
Article
Engineering, Chemical
Jucai Wei, Juan Yi, Xu Wu
Summary: This paper presents the development of an (NH4)(2)SO3/air fuel cell for energy recovery and production of (NH4)(2)SO4 fertilizer from ammonium desulfurization solution. The fuel cell operates using the desulfurization solution as fuel and air as the electron acceptor. The electrooxidation mechanisms and dynamic parameters of sulfite and sulfate on a PtPd2.75/C catalyst are investigated, and a laboratory-scale fuel cell with three chambers is fabricated and simulated successfully. The fuel cell exhibits promising performance in terms of open cell voltage, discharge current density, and power density, making it a potential method for recycling energy and matter from environmental pollutants.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Andoni Ugartemendia, Kristien Peeters, Piero Ferrari, Abel de Cozar, Jose M. Mercero, Ewald Janssens, Elisa Jimenez-Izal
Summary: The study found that germanium doping can promote the resistance of platinum catalysts to CO poisoning, reduce deactivation, and weaken the binding strength between Pt and CO. This research provides a new direction for catalyst design in fuel cells.
Article
Chemistry, Physical
Athira Anil, Jai White, Egon Campos dos Santos, Irina Terekhina, Mats Johnsson, Lars G. M. Pettersson, Ann Cornell, German Salazar-Alvarez
Summary: In this study, three platinum systems with distinct pore mesostructures were developed, showing high electrochemically active surface area and efficient catalytic activity for the production of hydrogen and value-added products through the electrooxidation of glycerol.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Attila Kormanyos, Alan Savan, Alfred Ludwig, Florian D. Speck, Karl J. J. Mayrhofer, Serhiy Cherevko
Summary: This study investigates the composition-dependent activity and stability of PtxIr100-x alloy electrocatalysts for the electro-oxidation of isopropanol using a high-throughput electrochemical approach. Results show that samples with lower Ir content exhibit higher activity, with decreasing current densities as the amount of Ir increases. Additionally, the presence of isopropanol significantly increases the stability of PtxIr100-x alloys.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Hongyu Zhang, Dianxue Cao, Zhuwu Jiang, Hai Yu, Antong Shi, Xue Bai
Summary: By introducing mesoporous carbon and nickel dots, the special structure of OMC@NiO/Ni has been created, enhancing the active sites contacting with electrolyte and providing conductive scaffolds for electron transport. This structure exhibits high specific capacitance and excellent cycling life, offering potential application prospects for energy storage-conversion equipments.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Xue Bai, Dianxue Cao, Zhuwu Jiang, Hongyu Zhang
Summary: Aqueous batteries with low cost, high safety, and environmental friendliness utilize inorganic salt solutions as electrolytes. By exploring the use of hydrated lithium manganese oxide as cathode and VO2 nanosheet flower as anode in such batteries, researchers have achieved outstanding electrochemical performance and rate ability.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Energy & Fuels
Xianchao Wang, Weirong Li, Yanqin Xue, Junnan Liu, Yipeng Yue, Chunliang Zhou, Kai Zhu, Dianxue Cao, Ye Chen, Guiling Wang
Summary: CoS/NC composites were successfully prepared by applying chemical vapor deposition (CVD) treatment using ZIF-67 as precursor, with the optimal curing temperature being 700 degrees C. The CoS/NC-700 composites exhibit a hollow cage-like polyhedron structure composed of CoS nanosheets and nitrogen-doped carbon skeleton. These composites demonstrate a specific capacitance of 789 F g(-1) at 1 A g(-1) current density and a rate capacity of 80.2% at a current density of 20 A g(-1). Furthermore, the CoS/NC-700//AC capacitor shows the highest energy density of 32.8 Wh kg(-1) at a power density of 620.0 W kg(-1), while maintaining 89.2% of initial capacitance after 10,000 charge-discharge cycles at a current density of 5 A g(-1).
JOURNAL OF ENERGY STORAGE
(2022)
Article
Materials Science, Multidisciplinary
Shengnan Zhang, Chunlin Zhao, Kai Zhu, Jiaqi Zhao, Yinyi Gao, Ke Ye, Jun Yan, Guiling Wang, Dianxue Cao
Summary: Aqueous Mg ion batteries (AMIBs) have great potential for energy storage due to their high capacity, abundant resource, and environmental friendliness. However, the scarcity of suitable anode materials limits the development of AMIBs. In this study, a new polymer anode material with a flower-like nanosheet structure is synthesized for aqueous Mg-Na hybrid-ion battery. The polymer electrode material exhibits high discharge specific capacity and maintains its framework structure during the cycling process of the hybrid-ion battery.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Energy & Fuels
Hongyu Zhang, Hongcheng Di, Dianxue Cao, Zhuwu Jiang, Zhipeng Hu, Xue Bai
Summary: Doping Mn element into the host material improves the specific capacitance and cycling stability of supercapacitors. In this study, Co-Mn LDHs hollow polyhedron was fabricated through a template sacrifice method, and the effect of controllable Mn element doping on electrochemical performance was investigated. A negative electrode based on MXene/rGO/V10O24 was synthesized to achieve high energy and power output in a hybrid supercapacitor. The results showed that the asymmetric supercapacitor of CMLs-0.53//MXene/rGO/V10O24 had a high energy density of 44.4 Wh kg(-1), a maximum power density of 12 750 W kg(-1), and excellent cycling life. The construction of CMLs with a hollow structure offers new insight into the preparation procedure, and the device based on CMLs-0.53 and MXene/rGO/V10O24 is a promising candidate for future energy storage and conversion systems.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Xuan Zhang, Yanqin Xue, Xianzhi Yin, Lian Shen, Kai Zhu, Xiaomei Huang, Dianxue Cao, Jiaxin Yao, Guiling Wang, Qing Yan
Summary: This study successfully fabricated Mn oxides-Fe-Ni sulfide composite materials as HER electrodes in alkaline media using a two-step hydrothermal process. The electrode shows low working potential and good stability.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Shichao Ding, Jordan Alysia Barr, Qiurong Shi, Yachao Zeng, Peter Tieu, Zhaoyuan Lyu, Lingzhe Fang, Tao Li, Xiaoqing Pan, Scott P. Beckman, Dan Du, Hongfei Lin, Jin-Cheng Li, Gang Wu, Yuehe Lin
Summary: Fe-N-C single-atomic metal site catalysts (SACs) have attracted great interest as substitutes for Pt-based catalysts in the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells. Efforts have been made to modulate the electronic structure of metal single-atomic sites to enhance the catalytic activities. This study uses chlorine to adjust the active center via a near-range coordinated interaction, improving the intrinsic ORR activity.
Article
Chemistry, Physical
Abdul Hanan, Dong Shu, Umair Aftab, Dianxue Cao, Abdul Jaleel Laghari, Muhammad Yameen Solangi, Muhammad Ishaque Abro, Ayman Nafady, Brigitte Vigolo, Aneela Tahira, Zafar Hussain Ibupoto
Summary: This study develops a composite system based on carbon materials and transition metal-based compounds, resulting in the synthesis of an optimized Co2FeO4@rGO composite. The composite exhibits outstanding multifunctional applications in the oxygen evolution reaction (OER) and hydrogen counterpart (HER) due to its high electrical conductivity, density of active sites, crystal defects, oxygen vacancies, and favorable electronic structure.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Xianzhi Yin, Kai Zhu, Ke Ye, Jun Yan, Dianxue Cao, Dongming Zhang, Jiaxin Yao, Guiling Wang
Summary: A bi-functional electrode material of self-supporting N-doped C foam grown Pd nanoparticles (Pd@N/C-8 foam) for NaBH4 electrooxidation and H2O2 reduction reaction is successfully prepared and exhibits extraordinary catalytic performance and kinetic parameters. Its application in a direct sodium borohydride-hydrogen peroxide fuel cell (DBHPFC) demonstrates excellent stability and maximum power density.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Ruibai Cang, Mingyi Zhang, Xuejiao Zhou, Kai Zhu, Xitian Zhang, Dianxue Cao
Summary: A new anode material, 3D-conjugate of 3,4,9,10-perylenetracarboxylic diimide-1,3,5-triazine-2,4,6-triamine (3D-P(PDI-T)), was designed and synthesized for aqueous Mg-ion batteries (MIBs). The increased aromatic structure improved its structural stability by reducing its solubility in aqueous electrolytes. The 3D-P(PDI-T) anode exhibited high rate capacity, reversible capacity, and long cycle life, making it a promising candidate for MIBs.
Article
Chemistry, Physical
Boya Liu, Kai Zhu, Ke Ye, Jun Yan, Guiling Wang, Dianxue Cao
Summary: By designing and constructing the PANI-PPI-9 composite, the electrochemical performance of PPI is improved, especially in terms of battery cycling life. The PANI shell acts as an electronic transport highway without obstructing the lithium storage of PPI.
JOURNAL OF POWER SOURCES
(2022)
Article
Green & Sustainable Science & Technology
Xianzhi Yin, Meiling Hou, Kai Zhu, Ke Ye, Jun Yan, Dianxue Cao, Dongming Zhang, Jiaxin Yao, Guiling Wang
Summary: A novel electrode of PdCu nanoparticles modified rGO framework was fabricated and exhibited excellent catalytic performance for DBHPFC. The superior performance of the optimized electrode can be attributed to its unique structure and the strong adsorption and bond-breaking ability of Pd nanoparticles.
Article
Chemistry, Multidisciplinary
Shengnan Zhang, Kai Zhu, Yinyi Gao, Tianzeng Bao, Hongbin Wu, Dianxue Cao
Summary: Polyimide, as a promising electrode material for lithium-ion batteries, has easy synthesis, customizable structure, and structural stability. The benzene ring structure of polyimide exhibits strong lithium storage capacity as a negative electrode material. We designed and synthesized a polyimide organic polymer (PBPAQ) with a unique spherical flower structure, which enhances the interaction between the electrode material and the electrolyte. The PBPAQ anode shows a specific discharge capacity of 738 mAh g(-1) after 100 cycles at 0.1 A g(-1), laying a foundation for future research on LIB anodes.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Yong-Zheng Fang, Sainan Liang, Xu Zhang, Junwu Sang, Shasha Gao, Zhang Zhang, Kai Zhu, Dianxue Cao, Zhen Zhou
Summary: A stable 3D matrix is designed by coating a carbon skeleton with MXene, which can effectively induce the evolution of advantageous Li(110) facets of Li metal anodes, resulting in a dendrite-free anode interface and stable plating-stripping behaviours.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Borong Lu, Dong Wang, Chunlin Zhao, Kai Zhu, Jun Yan, Guiling Wang, Dianxue Cao, Ke Ye
Summary: Combining urea oxidation reaction (UOR) and hydrogen evolution reaction (HER) using catalyst CNCP-350 shows highly efficient catalytic activity in both UOR and HER, achieving efficient hydrogen production.
MATERIALS CHEMISTRY FRONTIERS
(2022)
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)