Article
Nanoscience & Nanotechnology
Jiaqi Yu, Anna F. Kolln, Dapeng Jing, Jinsu Oh, Hengzhou Liu, Zhiyuan Qi, Lin Zhou, Wenzhen Li, Wenyu Huang
Summary: A one-pot, two-step hot injection method was developed to prepare Cu6Sn5-Sn hybrid intermetallic-metal nanoparticles with an anisotropic structure, which showed high activity in electrocatalytic nitrate reduction reaction, selectively producing nitrite within a wide reduction potential window.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Food Science & Technology
Marzieh Sepahvand, Forough Ghasemi, Hossein Mir Seyed Hosseini
Summary: This paper discusses the serious threat of irregular and unknowing use of chemical compounds to the environment, human health, and living organisms, emphasizing the importance of monitoring nitrite and nitrate. It comprehensively discusses the application and advantages of nanoplasmonic colorimetric sensors in the measurement of nitrite and nitrate.
FOOD AND CHEMICAL TOXICOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Yunlong Zhou, Yu Zou, Jiang Jiang
Summary: In this study, a chiral cysteine-directed seeded-growth approach was used to synthesize chorogi-like Au nanoparticles. The obtained nanoparticles exhibit distinct chiral plasmonic response and excellent catalytic activity, offering new opportunities for broadening optical and catalytic applications of Au nanoparticles.
Article
Chemistry, Multidisciplinary
Areum Yu, Myung Hwa Kim, Chongmok Lee, Youngmi Lee
Summary: A variety of binary Ru-Co mixed oxide nanotubes were successfully synthesized via electrospinning, showing excellent oxygen evolution reaction (OER) activity and improved stability, making them a promising and cost-effective OER catalyst.
Article
Chemistry, Physical
Ali Saad, Dongqing Liu, Yuchen Wu, Zhaoqi Song, Ying Li, Tayyaba Najam, Kai Zong, Panagiotis Tsiakaras, Xingke Cai
Summary: The study introduces borophene decorated with Ag nanoparticles (Ag@B) as a support for Co3O4 catalysts, significantly enhancing the oxygen-evolution-reaction (OER) performance. The improved OER activity of Co3O4-Ag@B is attributed to the increased catalytic sites on Co3O4 facilitated by conductive Ag nanoparticles and the reduced energy barrier for OER rate-determining step due to strong interaction of B atoms with Co and O atoms on Co3O4 nanoplates.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Yan-Fang Xue, Heng Li, Qingmei Ge, Mao Liu, Zhu Tao, Hang Cong
Summary: A supramolecular chiral electrode was constructed by layer-by-layer assembly of gold nanoparticles and S-chiral multifarene on a glassy carbon electrode surface for the electroreduction of acetophenone. The optimized electrolysis process showed high yield and enantioselectivity. The experiment demonstrated the stability and recyclability of the novel chiral electrode.
JOURNAL OF CATALYSIS
(2021)
Article
Environmental Sciences
Humayra Begum, Md Nurnobi Islam, Sami Ben Aoun, Jamil A. Safwan, Syed Shaheen Shah, Md Abdul Aziz, Mohammad A. Hasnat
Summary: This study explores the effect of three coinage metals (Cu, Ag, and Au) on Pt electrode for the electrochemical reduction of nitrate in neutral solution. Among the three electrodes, Pt-Cu exhibits the best catalytic activity, while Pt-Au electrode shows no reactivity. Nitrate reduction at Pt-Cu electrode yields ammonia via both direct and indirect reaction pathways. The cathodic transfer coefficients and standard rate constants for nitrate reduction were calculated for Pt-Cu and Pt-Ag electrodes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Analytical
Nobuhle Ndebele, Sithi Mgidlana, Tebello Nyokong
Summary: This paper explores the synthesis and characterization of an asymmetrical Co phthalocyanine (CoPc), its covalent linking to two tungsten nanoparticles, and their electrocatalytic properties in the detection of nitrite. The conjugates of Bi2WO6 and NiWO4 showed different sensitivities and limits of detection, with Bi2WO6 exhibiting better performance.
Article
Green & Sustainable Science & Technology
Jahan Zeb Hassan, Ayesha Zaheer, Ali Raza, Gao Li
Summary: In recent years, innovative green technologies such as electrocatalysis and photocatalysis have been rapidly developed to address energy and environmental concerns. Traditional semiconductors used in photocatalysis have poor performance due to their limited absorption of visible light. Plasmonic gold nanoparticles (Au NPs) offer superior absorption characteristics for visible light and greatly enhance the photocatalytic activity in various applications. In electrocatalytic energy conversion, nanogold electrocatalysts have shown exceptional performance in reactions such as the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reaction (HER), nitrogen reduction reaction (NRR), and CO2 reduction reaction (CO2RR). This review summarizes the progress and discusses size-dependent activity, metal structures, molecular activation, and catalytic mechanisms. Future efforts are needed to develop promising catalysts for industrial and practical applications.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Chemistry, Applied
Atieh Aghajani, Marie-Pierre Santoni, Peyman Mirzaei, Ahmed A. Mohamed, Mohamed M. Chehimi, Mohamed Jouini
Summary: Alcohol oxidation is an important reaction in the food industry and pharmaceuticals. This study focuses on the use of gold nanoparticles as catalysts for alcohol oxidation. By modifying the nanoparticles with specific diazonium salts, the electrocatalytic performance of the nanoparticles in the oxidation of ethanol was enhanced. The results show that single-salt arylation leads to better catalytic performance compared to double-salt arylation, which is attributed to the hinderance of ethanol access caused by the hydrophobic effect of the diazonium salts.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Analytical
Svetlana Dorovskikh, Darya D. Klyamer, Anastasiya D. Fedorenko, Natalia B. Morozova, Tamara Basova
Summary: This paper describes the electrochemical behavior of a modified glass carbon electrode (GCE) coated with Fe(II) tetra-tert-butyl phthalocyanine film (FePc(tBu)(4)/GCE) and decorated with gold nanoparticles (Au/FePc(tBu)(4)/GCE) for the detection and control of nitrate content in food products. The modified electrode exhibited high sensitivity, low limit of detection, good repeatability, and stability. It showed selective response to nitrite ions in the presence of interfering anions, and successfully detected nitrite ions in real meat product samples.
Article
Chemistry, Multidisciplinary
Ming Chen, Zheng-Jian Wu, Jinshuai Song, Hai-Chao Xu
Summary: In this study, an electrocatalytic allylic C-H alkylation reaction with carbon nucleophiles was achieved using a readily available cobalt-salen complex as the catalyst. The mild conditions and unique electrocatalytic radical process allowed for excellent functional group tolerance and substrate compatibility.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Li-Wei Chen, Yu-Chen Hao, Jiani Li, Linyu Hu, Yu Guo, Shuai Li, Di Liu, Zhejiaji Zhu, Si-Qian Wu, Hui-Zi Huang, An-Xiang Yin, Bo Wang, Ya-Wen Zhang
Summary: In this study, we modified the surface structures of gold nanoparticles using a solution synthesis method with H2O2, creating tensile surface steps. The modified gold nanoparticles showed significantly enhanced CO2RR activity and selectivity, with higher CO-production current density and Faradaic efficiency at lower overpotentials.
SCIENCE CHINA-CHEMISTRY
(2022)
Article
Electrochemistry
Giulia Moggia, Saskia Hoekx, Nick Daems, Sara Bals, Tom Breugelmans
Summary: A facile and one-pot chemical synthesis method was used to produce gold nanoparticles evenly dispersed on porous activated carbon. The pH of the synthesis bath played a crucial role in determining the optimal gold-carbon interaction and achieving a high metal utilization of 93%. The obtained AuNP/C nanocomposite had a large electroactive surface area and showed potential as an anode catalyst for fuel cells and for electrochemical reactions involving small molecules with high diffusivity (e.g. CO2, CH4, N2).
Article
Biochemistry & Molecular Biology
Kamila Malecka, Balwinder Kaur, D. Andrea Cristaldi, Clarissa S. Chay, Iwona Mames, Hanna Radecka, Jerzy Radecki, Eugen Stulz
Summary: A cobalt-porphyrin modified DNA was used as an electrochemical marker to detect specific DNA sequences, comparing the performance of gold and silver nanoparticles in oligonucleotide sensors. Surprisingly, both types of sensors showed similar overall performance, with direct electron transfer between the porphyrin and the electrode. The silver system displayed better DNA economy and cost-effectiveness compared to gold, making it more suitable for mass production of highly sensitive DNA sensors.
BIOELECTROCHEMISTRY
(2021)
Article
Chemistry, Analytical
Mbulelo Jokazi, Lekhetho S. Mpeta, Tebello Nyokong
Summary: Manganese and cobalt metalated porphyrins attached to graphene quantum dots showed improved electrocatalytic activity for the oxidation of hydrazine, with CoTA(3)CPP-GQDs exhibiting the best catalytic rate constants and lowest limits of detection.
Article
Biochemistry & Molecular Biology
Pinar Sen, Azole Sindelo, Nnaemeka Nnaji, John Mack, Tebello Nyokong
Summary: Novel mono- and dipyridylvinyl boron dipyrromethene dyes were prepared and compared to the corresponding core dyes for their photodynamic antimicrobial chemotherapy (PACT) activities. Results showed that the spectral properties of the dyes and the generation of singlet oxygen could be controlled through pyridylvinyl substitution and iodine atom incorporation, but the pi-extended dyes had lower activities compared to the core dye.
PHOTOCHEMISTRY AND PHOTOBIOLOGY
(2023)
Article
Oncology
Yolande Ikala Openda, Tebello Nyokong
Summary: Photodynamic antimicrobial chemotherapy (PACT) combined with ciprofloxacin (CIP) effectively reduces the biofilm cell survival of antibiotic-resistant S. aureus and E. coli strains. PACT alone shows no significant activity, while CIP alone exhibits some inhibitory activity. The combination treatment completely eradicates mature biofilms.
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
(2023)
Article
Materials Science, Multidisciplinary
Lindokuhle Cindy Nene, Tebello Nyokong
Summary: This study presents the preparation of cationic thiazole phthalocyanines (Pcs) conjugates with nitrogen doped (NGQDs) and nitrogen/sulfur co-doped (NSGQDs) graphene quantum dots (GQDs). The photo-sonodynamic combinatorial therapy (PSDT) activities of the conjugates were tested in vitro with cancer cell lines. The conjugates exhibited the production of reactive oxygen species (ROS) through the treatment technique. The Pc-GQDs generated singlet oxygen and hydroxyl radicals when exposed to light and low frequency ultrasound in PSDT. Cancer eradication was observed in vitro for the PSDT treatment using the Pc-GQDs conjugates. The NGQDs conjugates performed better in terms of ROS generation and cell eradication compared to the NSGQDs conjugates. The PSDT treatments showed increased ROS generation and cancer eradication efficiencies compared to PDT and SDT monotreatments.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Nobuhle Ndebele, Tebello Nyokong
Summary: This study presents the non-covalent conjugation of carbon-based nanomaterial with tris(4-tert-butylphenoxy)-(5-phenoxylpicolinic acid) phthalocyanato cobalt (II) (CoPc). The hybrids of CoPc with graphene quantum dots (GQDs), nitrogen-doped quantum dots (NGQDs), and single-walled carbon nanotubes (SWCNTs) were successfully synthesized and characterized. The electrochemical analysis showed that the CoPc and its conjugates exhibited good nitrite detection capabilities, with sensitivities (3-28 mu A mu M-1), catalytic rate constants (1.8 x 102-5.42 x 104 M-1 s-1), and limits of detection (0.17-1.70 mu M) comparable to those in literature.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Lindokuhle Cindy Nene, Tebello Nyokong
Summary: This study investigates the effects of ultrasonic frequency and power on the stability, reactive oxygen species yields, and cytotoxicity activities of different substituted ionic phthalocyanines (Pcs) in sonodynamic therapy (SDT). The degradation of Pcs increases with increasing power at Par II. Two reactive oxygen species, singlet oxygen and hydroxyl radicals, were detected in ultrasound treated Pcs. Par I was chosen for SDT, photodynamic therapy (PDT), and photo-sonodynamic therapy (PSDT) due to minimal degradation of most Pcs. PSDT generally shows improved therapeutic efficacies compared to SDT and PDT mono treatments.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Nnamdi Nwahara, Garth Abrahams, John Mack, Earl Prinsloo, Tebello Nyokong
Summary: This study presents a liposome loaded-silicon (IV) phthalocyanine (SiPc) with naphthoquinone axial ligands as hypoxia-responsive prodrug-like moieties (Prodrug-SiPc). Computational methods were used to assess the photophysical, photochemical and electrochemical redox properties of Prodrug-SiPc, revealing the relationship between material structure and properties. The liposomal encapsulation of Prodrug-SiPc resulted in potential photodynamic therapy (PDT) drug candidates, which took advantage of the hypoxic microenvironment of tumors to enhance therapeutic efficacy compared to typical PDT.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2023)
Article
Chemistry, Physical
Lindokuhle Cindy Nene, Tebello Nyokong
Summary: This study explores the effects of gold and silver nanoparticles on the in vitro anticancer photo and sono-dynamic therapy and their combination therapy using cationic thiazole-phthalocyanines. The results show that conjugation to nanoparticles increases the generation of oxygen species and the combination therapy exhibits higher anticancer activity compared to monotherapies.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Gugu Kubheka, Nthabeleng Molupe, John Mack, Tebello Nyokong
Summary: The ease of functionalization of BODIPY dyes allows for the preparation of pH indicators by introducing suitable functional groups. In this study, two dimethylamino substituted BODIPY dyes were synthesized and characterized, and their photophysical properties and pH response were investigated.
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
(2023)
Article
Chemistry, Applied
Chenming Chan, Jia Li, Jianwei Wu, Youchun Zi, Zhaoli Xue, Mahlatse Ledwaba, John Mack, Tebello Nyokong
Summary: Due to the significant hazardous impact of Hg2+ on the environment and ecosystem, there is a need for highly sensitive and selective Hg2+ probes. A new imidazole-based Hg2+ probe has been synthesized and characterized, which can detect Hg2+ through an ion-specific co-ordination mechanism. The probe exhibits significant fluorescence enhancement in acetonitrile solutions containing Hg2+, with a limit of detection of 0.30 mu M. Additionally, it shows utility in detecting Hg2+ in biochemical systems and the environment based on paper test strip and HeLa cell experiments.
Article
Chemistry, Analytical
Lunathi Ncwane, Lekhetho S. Mpeta, Tebello Nyokong
Summary: This study investigates the effect of detonation nanodiamonds (DNDs) on the electrocatalytic properties of an asymmetrically substituted cobalt phthalocyanine (CoPc). The addition of DNDs enhances the electrochemical behavior of CoPc. Various modifications of glassy carbon electrode (GCE) were made using CoPc alone, CoPc-DNDs(pi pi) or CoPc@DNDs, and the sequential addition of CoPc and DNDs. Among these modifications, GCE/CoPc@DNDs showed the best electrocatalytic activity for the detection of hydrazine, with a catalytic rate of 9.3x10(4) M-1.s(-1) and a detection limit of 0.33 mu M.
Article
Oncology
Aviwe Magadla, Yolande Ikala Openda, Lekhetho S. Mpeta, Tebello Nyokong
Summary: In this study, we synthesized three phthalocyanine complexes and investigated their effects on photodynamic antimicrobial chemotherapy (PACT) against E.coli and S.aureus in both planktonic and biofilm forms. Complex 4, with 8 cationic charges, showed the highest activity against the biofilms. Surface stability of E.coli and S.aureus biofilms in the presence of complex 4 was analyzed using cyclic voltammetry, and conformational and biochemical changes within the biofilm were studied using scanning electron microscopy (SEM) and Raman spectra.
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
(2023)
Article
Oncology
Azole Sindelo, Pinar Sen, Tebello Nyokong
Summary: Antimicrobial photodynamic inactivation (aPDI) is an effective method for eradicating drug-resistant microorganisms due to its minimal possibility of microbial resistance. This study focuses on the preparation and characterization of novel neutral and cationic morpholine containing Schiff base phthalocyanines. The cationic complexes show promising photodynamic activity against various microorganisms, while the neutral complexes are not suitable for antimicrobial studies. The effectiveness of aPDI is dependent on the concentration and light dose.
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
(2023)
Article
Chemistry, Inorganic & Nuclear
Reitumetse Nkhahle, Nthabeleng Molupe, John Mack, Tebello Nyokong
Summary: This work provides a synthesis method for an unsymmetrically substituted cobalt phthalocyanine and its symmetric counterpart, and applies them in electrocatalysis. The results show that the unsymmetrically substituted cobalt phthalocyanine exhibits superior performance in electrocatalytic reactions. The reactivity of the complexes is further evaluated using theoretical calculations, which indicate that the unsymmetrically substituted compound has higher reactivity.
INORGANICA CHIMICA ACTA
(2023)
Review
Chemistry, Inorganic & Nuclear
Balaji Babu, John Mack, Tebello Nyokong
Summary: Photodynamic therapy is a cancer treatment that involves a nontoxic photosensitizer, a light source, and ground-state molecular oxygen. Activation of the photosensitizer by light generates reactive oxygen species, which destroy cancer cells.
DALTON TRANSACTIONS
(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)
