Article
Chemistry, Physical
Tian-Wen Jiang, Xianxian Qin, Ke Ye, Wei-Yi Zhang, Hong Li, Wenhui Liu, Shengjuan Huo, Xia-Guang Zhang, Kun Jiang, Wen-Bin Cai
Summary: This work addresses the key challenges in the electrochemical reduction of CO2 to formate (CO2RRTF) on Pd-based surfaces, including the identification of a high-performance catalyst and the validation of the reaction pathway. By studying the catalyst and mechanism interactively, a Bi-modified Pd/C catalyst is found to exhibit significantly improved activity, selectivity, durability, and extended working potentials for CO2RRTF. The mechanism of CO2 chemical hydrogenation on Pd surfaces is clarified, with monodentate formate identified as the key intermediate, through isotope labeled ATR-SEIRAS measurement, kinetic analysis, and DFT calculations.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Analytical
Osai J. R. Clarke, Annabel Rowley, Robert V. Fox, Abderrahman Atifi, Ian J. Burgess
Summary: This study reports on a method for performing ATR-SEIRAS studies at very negative potentials by using boron-doped diamond film as a substrate and depositing gold nanoparticles for electrocatalysis. This method allows for the observation of the formation of hydrazine and ammonia under these conditions.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Zhiming Wei, Yuhang Liu, Jie Ding, Qinye He, Qiao Zhang, Yueming Zhai
Summary: Sulfur-doped cobalt-nitrogen-carbon single-atom catalyst (Co1-SNC) exhibits superior performance in the electrocatalytic CO2 reduction reaction (CO2RR) compared to the sulfur-free counterpart (Co1-NC). In situ attenuated total reflectance surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS), kinetic isotope effect (KIE), and theoretical calculation demonstrate that sulfur doping can promote water activation, elevate the d-band center of Co active site, and reduce the free energy of *COOH intermediate formation. This work deepens the understanding of heteroatom-doped single-atom catalysts in designing efficient CO2RR processes.
CHINESE JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Rui-Lin Wei, Ming-Yao Miao, Yue Liu, Xiao-Le Jiang, Yao-Yue Yang
Summary: Experimental results show that linearly adsorbed CO species are detected on the Ir surface, and continuous dosing of CO leads to a decrease in open-circuit potential of the Ir electrode, indicating displacement or consumption of surface OH species.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Yan Wei, Zijie Mao, Xian-Yin Ma, Chao Zhan, Wen-Bin Cai
Summary: This study explores the use of localized surface plasmon resonance (LSPR) effect to enhance the electrocatalytic ethanol oxidation reaction under visible light in alkaline media. The Au@Pt nanoparticles with plasmonic core and active shell exhibit higher activity and selectivity under illumination. In situ surface IR spectroscopy provides molecular level insights into the reaction mechanism. This research expands the application of plasmonic electrocatalysis and in situ surface IR spectroscopy, and offers a promising approach for tuning complex reaction pathways.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Minmin Wang, Kaian Sun, Wanliang Mi, Chao Feng, Zekun Guan, Yunqi Liu, Yuan Pan
Summary: This research proposes an efficient doping-adsorption-pyrolysis strategy to construct a robust coupling catalyst composed of single-atom Co-N-3 sites and Co nanocrystals, which activates the interfacial water to accelerate electrocatalytic hydrogen evolution reaction (HER). The Co-N-3 sites inhibit the transport of H2O*/OH*, while the Co NCs increase the available H2O*, accelerating the HER process.
Article
Chemistry, Multidisciplinary
Jimin Song, Xiaojuan Yu, Alexei Nefedov, Peter G. Weidler, Sylvian Grosjean, Stefan Braese, Yuemin Wang, Christof Woell
Summary: This study demonstrates a method to observe UV-induced photochemical reactions of aryl azides within a crystalline matrix in vacuum. By using metal-organic frameworks (MOFs) and surface-mounted MOFs (SURMOFs) as model systems, the azide-related chemical processes can be studied under ultrahigh vacuum (UHV) conditions, excluding solvent effects and in a wide temperature range. In situ infrared reflection absorption spectroscopy (IRRAS) was used to monitor the photoreaction of azide in SURMOFs, revealing the reaction mechanism.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Na Ye, Pengcheng Zhao, Xiaoying Qi, Riguang Zhang, Binhang Yan, Wenchao Sheng, Zhao Jiang, Tao Fang
Summary: This study fabricates a core-shell Pd3Ni1-TaN/C catalyst with highly dispersed Ni sites and nitrogen defects, which shows high efficiency for alkaline methanol oxidation. The introduction of TaN enhances the reaction via HCOOad pathway and enhanced OH adsorption. The CO tolerance is also improved by the addition of Ni species and nitrogen vacancies.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Physics, Multidisciplinary
Chen Liu, Yinong Zhou, Guanyong Wang, Yin Yin, Can Li, Haili Huang, Dandan Guan, Yaoyi Li, Shiyong Wang, Hao Zheng, Canhua Liu, Yong Han, James W. Evans, Feng Liu, Jinfeng Jia
Summary: After depositing Bi on InSb(111)B, a Sierpifiski-triangle (ST)-like structure is observed in Bi thin films, which turns off the intrinsic electronic topology. The formation of ST-like islands is driven by the relaxation of a large misfit strain between the Bi adlayer and substrate. Besides a sufficiently large tensile strain, forming ST-like structures also requires larger adlayer-substrate and intra-adlayer elastic stiffnesses, and weaker intra-adlayer interatomic interactions.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Arianna Rivalta, Cristiano Albonetti, Davide Biancone, Michele Della Ciana, Simone D'Agostino, Laure Biniek, Martin Brinkmann, Andrea Giunchi, Tommaso Salzillo, Aldo Brillante, Raffaele Guido Della Valle, Elisabetta Venuti
Summary: Thin films of natural semiconductor indigo were grown on Si/SiO2 substrates by physical vapor deposition under ultra-high vacuum conditions, with the deposition rate monitored to study its impact on structure, morphology, and thickness. Characterization using X-ray diffraction, atomic force microscopy, microRaman spectroscopy, and transmission electron microscopy revealed that the growth at the solid interface of polymorph B is governed by the formation of strong multiple hydrogen-bonds.
SURFACES AND INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Calley N. Eads, Tianhao Hu, Yi Tian, Kim Kisslinger, Samuel A. Tenney, Ashley R. Head
Summary: Metal-organic frameworks (MOFs) are versatile materials with intrinsic porosity, and can be used for gas adsorption, separation, and catalysis. In this study, we investigated the adsorption properties and reactivity of thin film derivatives of Zr-O based MOF powders, and explored their potential for different functionalities by incorporating different linker groups and embedded metal nanoparticles. Using transflectance IR spectroscopy, we characterized the active sites and performed metal-based catalysis with a Pt@UiO-66-NH2 film. Our findings demonstrate the utility of surface science techniques in studying the reactivity and chemical/electronic structure of MOFs.
Article
Chemistry, Multidisciplinary
Na Ye, Wenchao Sheng, Riguang Zhang, Binhang Yan, Zhao Jiang, Tao Fang
Summary: This study reveals that the interface interaction between PdSn and NbN enhances the catalytic performance of Pd1Sn3-NbN/C catalyst for the cleavage of C-C bonds in alkaline ethanol oxidation reaction. The optimal catalyst shows 43.5 times higher activity than commercial Pd/C and exhibits good durability. In situ ATR-SEIRAS and DFT calculations confirm that NbN facilitates the C-C bonds cleavage and subsequent oxidation of C1 intermediates.
Article
Chemistry, Physical
Aigerim Galyamova, Hyunwoo Ha, Graeme Henkelman, Richard M. Crooks
Summary: In this article, a robust experimental model investigating strong metal-support interactions (SMSI) and their impact on electrocatalytic reactions is reported. The beneficial interactions between Ni0.9O thin film supports and PtNPs in the CO electrooxidation reaction are described. The results show negative shifts of the CO electrooxidation peak potential when Ni0.9O thin films are in contact with Pt55 NPs and Pt140 NPs, and the oxygen evolution reaction (OER) is suppressed only when PtNPs are in contact with Ni0.9O thin films. Density functional theory (DFT) calculations attribute the CO electrooxidation enhancement and OER suppression to changes in binding energies at the NiO(111)/Pt55 NP interface.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Akira Oda, Mizuki Horie, Naoya Murata, Kyoichi Sawabe, Atsushi Satsuma
Summary: The successful preparation of a highly-active Rh-containing zeolite catalyst capable of selectively oxidizing methane to acetic acid at low temperatures has been achieved.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Neslihan Torun, Ilker Torun, Menekse Sakir, Mustafa Kalay, M. Serdar Onses
Summary: There is a strong demand for encoded surfaces with multiple security layers that are prepared by stochastic processes and are adaptable to deterministic fabrication approaches. Dewetting instabilities in nanoscopic polymer films present a suitable platform for fabricating unclonable surfaces, with the thermal annealing-induced dewetting of P2VP enabling fabrication of randomly positioned functional features that are separated at a microscopic length scale. The patterning of P2VP films presents opportunities for fabricating hybrid security labels, which can be resolved through both stochastic and deterministic pathways, offering key opportunities in encoding applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
V Del Colle, P. B. Perroni, J. M. Feliu, G. Tremiliosi-Filho, H. Varela
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Chemistry, Analytical
Jose M. Gisbert-Gonzalez, William Cheuquepan, Adolfo Ferre-Vilaplana, Enrique Herrero, Juan M. Feliu
Summary: Adsorbed amino acids can modulate the behavior of metal nanoparticles in advanced applications through interactions with surfaces. The adsorption behavior of glutamate on Au(111) surface is influenced by solution pH and surface charge. Glutamate adsorption involves deprotonation of carboxylic groups and bonding in a bidentate configuration. The oxidation of glutamate only occurs on an oxidized surface, involving the transfer of an oxygen group while the main chain remains intact according to FTIR spectra.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Electrochemistry
Rodolfo M. Antoniassi, Heiki Erikson, Jose Solla-Gullon, Roberto M. Torresi, Juan M. Feliu
Summary: By controlling the shape, metal nanoparticles can be significantly improved for electrocatalysis, but overcoming limitations from large particle size is necessary for practical applications, where nanoparticles should be smaller than 5 nm. Researchers synthesized 3-5 nm cubic Pt nanoparticles with about 40% preferential {100} structure on the surface.
Article
Electrochemistry
Jose M. Gisbert-Gonzalez, Maria V. Oliver-Pardo, Valentin Briega-Martos, Juan M. Feliu, Enrique Herrero
Summary: The behavior of adsorbed CTAB on Au(111) electrodes was studied using electrochemical and FTIR experiments in different aqueous solutions. The results showed that the adsorbed layer was stable in acidic solutions. Changes in electrode charge led to changes in electrode capacitance, resulting in characteristic peaks.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Valentin Briega-Martos, William Cheuquepan, Juan M. Feliu
Summary: In this study, in situ external infrared reflection absorption spectroscopy (IRRAS) was used to detect intermediate species in the ORR mechanism on a flat and well-defined Pt surface. The main ORR-generated intermediate, O-2(-), was identified near the Pt surface in experimental conditions with limited reactivity, allowing for its detection without the use of additional signal enhancement methods.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Chemistry, Physical
Camilo A. Angelucci, Janaina Souza-Garcia, Juan M. Feliu
Summary: The use of single crystal electrodes as model catalysts is widely applied for studying reaction mechanisms. Changes in the surface structure and electronic properties affect adsorption energy, thus impacting catalytic activity. The influence of adsorbed species depends on surface structure, species nature, and the studied reaction.
CURRENT OPINION IN ELECTROCHEMISTRY
(2021)
Article
Electrochemistry
Jose M. Gisbert-Gonzalez, Maria Oliver-Pardo, Francisco J. Sarabia, Victor Climent, Juan M. Feliu, Enrique Herrero
Summary: This study investigated the adsorption behavior of CTAB and CTAOH on gold single crystal electrodes in solutions with different pH values. The stability and composition of the adsorbed adlayer were found to vary with changes in surface charge.
ELECTROCHIMICA ACTA
(2021)
Article
Electrochemistry
R. Martinez-Hincapie, A. Rodes, V Climent, J. M. Feliu
Summary: This study investigates the in-situ spectro-electrochemical behavior of Pt(110) electrodes in contact with acid solutions saturated with CO2, finding potential-dependent signals associated with adsorbed bicarbonate and carbonate anions. The relative intensities of infrared bands at different pH and applied potential values can be used to determine the interfacial pK(a),(2) of CO2. The surface pK(a),(2) value for Pt(110) electrodes is lower than that of Pt(111) electrodes, attributed to differences in surface structure and reactivity.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Ruben Rizo, Juan M. Feliu, Enrique Herrero
Summary: The HPRR on Pt surfaces was studied at pH = 13, showing that Pt(1 1 1) is the most active surface, but its activity decreases with the introduction of steps. Inhibition of HPRR was observed at low potentials, with the onset potential controlled by OHads and the point of maximum entropy. Experiments with different rotation rates suggested the formation of an HPRR intermediate linked to the inhibition process.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Rodolfo M. Antoniassi, Heiki Erikson, Jose Solla-Gullon, Roberto M. Torresi, Juan M. Feliu
Summary: The study demonstrates that deposition of Pd on small supported Pt materials leads to enhanced electrocatalytic activity for formic acid electrooxidation, with lower overpotentials and higher oxidation current densities. The intrinsic activity after Pd decoration is significantly increased, while the oxidation overpotential is shifted to lower values by around 200 mV.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Andrea Auer, Francisco J. Sarabia, Daniel Winkler, Christoph Griesser, Victor Climent, Juan M. Feliu, Julia Kunze-Liebhaeuser
Summary: It was found that Cu(111) modified with 0.1 and 0.2 monolayers of Ni(OH)(2) exhibits a non-linear activity trend with increasing coverage. In situ structural investigations and studies on the interfacial water orientation revealed a correlation between a specific threshold of surface roughness and the decrease in the ordering of the water network.
Article
Electrochemistry
Madis Lusi, Heiki Erikson, Kaido Tammeveski, Alexey Treshchalov, Arvo Kikas, Helle-Mai Piirsoo, Vambola Kisand, Aile Tamm, Jaan Aruvali, Jose Solla-Gullon, Juan M. Feliu
Summary: The study evaluated three mesoporous nitrogen-doped carbon support materials for oxygen reduction reaction, compared to Vulcan carbon, in 0.1 M KOH and 0.5 M H2SO4 solutions. Palladium nanoparticles were synthesised using the citrate method and the average particle size was determined. The unique porosities of the ECS were evaluated using the BET method, showing similar microporosity but varying mesopore distribution.
ELECTROCHIMICA ACTA
(2021)
Article
Electrochemistry
Andrea Auer, Francisco J. Sarabia, Christoph Griesser, Victor Climent, Juan M. Feliu, Julia Kunze-Liebhaeuser
Summary: Modifying Cu(111) electrodes with different foreign metals or metal hydroxides can significantly influence the electrocatalytic activity for the hydrogen evolution reaction, with Ni(OH)2 and Co(OH)2 enhancements and Cd decreases observed.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Luis E. Botello, V. Climent, J. M. Feliu
Summary: This study focuses on the thermodynamic characteristics of the hydrogen underpotential deposition process on Pt(111) in alkaline media, with a specific emphasis on hydrogen adsorption and its impact on hydrogen evolution.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Ariadna Segundo-Aguilar, Linda V. Gonzalez-Gutierrez, Victor Climent Paya, Juan Feliu, German Buitron, Bibiana Cercado
Summary: The study conducted simultaneous dual production of gaseous biofuels in a two-chamber MEC fed with digester effluents, testing different combinations of biomass content and cell voltage to produce biogas and hydrogen simultaneously. The data generated showed the energy efficiency and economic benefits of this system.
SUSTAINABLE ENERGY & FUELS
(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)
