Article
Chemistry, Multidisciplinary
Elias Abedelnour, Stephanie Ognier, Olivier Venier, Laurent Schio, Michael Tatoulian, Janine Cossy
Summary: This study presents the direct synthesis of trifluoromethyl N,N-aminals from nitrogen containing heterocycles using argon plasma in a continuous flow microreactor without any additives or metal catalysts. The transformation of these compounds to N-trifluoroethyl amines is also reported.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Organic
Lingling Shi, Lianyou Zheng, Shulin Ning, Qiansong Gao, Chengcheng Sun, Zhuoqi Zhang, Jinbao Xiang
Summary: An efficient electrooxidative dearomatization reaction of inactive biphenyls has been developed, providing a powerful tool for the rapid synthesis of cyclohexadienones. The method exhibits wide substrate scope and good functional group compatibility, even towards oxidation-sensitive motifs. It offers an environmentally friendly and direct approach for the construction of C-O bonds with high regioselectivity.
Article
Chemistry, Multidisciplinary
Igors Sokolovs, Nayereh Mohebbati, Robert Francke, Edgars Suna
Summary: In contrast to hypervalent iodine(III) compounds, little research has been done on isoelectronic bromine(III) compounds. A new method for preparing chelation-stabilized lambda(3)-bromanes was presented in this study, demonstrating their synthetic utility in oxidative reactions. The reactivity of stable bromine(III) species can be unlocked by the addition of a Lewis or a Bronsted acid, leading to the formation of C-C, C-N, and C-O bonds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Pitchiah E. Karthik, Vasanth Rajendiran Jothi, Sudhagar Pitchaimuthu, SungChul Yi, Sengeni Anantharaj
Summary: AC techniques are less commonly used in photoelectrocatalysis, but have great potential in further understanding interfaces and energy conversion reactions. Techniques like Mott-Schottky and intensity-modulated photocurrent spectroscopy can lead to advancements in the field.
Article
Biochemistry & Molecular Biology
Jinal B. Thakkar, Dimpal J. Aghera, Bhavana Trivedi, C. Ratna Prabha
Summary: High levels of triglycerides in blood can increase the risk of heart disease and strokes. A novel electro-chemical biosensor with lipase immobilized polymer film has been developed to estimate triglyceride content in various products. The portable biosensor can significantly reduce detection costs and has versatile applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Analytical
Shi-Hua Chen, Zong-Yin Song, Xiang-Yu Xiao, Hong-Qi Huang, Yuan-Fan Yang, Pei-Hua Li, Meng Yang, Xing-Jiu Huang
Summary: Vacancy and doping engineering were used to improve the electrocatalytic ability of nanomaterials for detecting heavy metal ions. The P-doped material showed enhanced sensitivity and selectivity towards As(III), and the vacancies provided abundant electrons to form active centers.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Huamin Wang, Meng He, Yongli Li, Heng Zhang, Dali Yang, Masanari Nagasaka, Zongchao Lv, Zhipeng Guan, Yangmin Cao, Fengping Gong, Zhilin Zhou, Jingyun Zhu, Supravat Samanta, Abhishek Dutta Chowdhury, Aiwen Lei
Summary: A highly selective, environmentally friendly, and scalable electrochemical protocol for constructing alpha-acyloxy sulfides has been developed, utilizing the synergistic effect of self-assembly-induced C(sp(3))-H/O-H cross-coupling. This protocol demonstrates broad substrate scope, high regioselectivity, gram-scale synthesis, construction of complex molecules, and applicability to various nucleophiles. The pivotal role of substrate self-assembly has been confirmed through soft X-ray absorption technique and control experiments, contributing to the excellent compatibility and precise regioselectivity control in the electrochemical protocol.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Qiucheng Xu, Sihang Liu, Francesco Longhin, Georg Kastlunger, Ib Chorkendorff, Brian Seger
Summary: The membrane-electrode assembly (MEA) approach is the most promising technique for high-rate CO2/CO electrolysis. However, there are challenges related to the crossover of ions and liquid products and the concomitant anodic oxidation reactions (AORs). This perspective investigates the impacts of anodic oxidation on performance evaluation by combining experimental and theoretical analyses and provides suggestions for rigorous performance evaluations in MEA-based setups.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Nils Kurig, Regina Palkovits
Summary: The growing awareness of the environmental impact caused by the chemical industry has led to considerations of a circular economy and the use of renewable electricity. This article reviews different strategies for electrochemical C-N functionalization using ammonia and atmospheric nitrogen as alternative nitrogen sources, aiming to achieve a more sustainable production. The potential of these strategies is evaluated, particularly for decentralized small-scale productions to bypass the Haber Bosch process.
Article
Chemistry, Multidisciplinary
Nils Kurig, Regina Palkovits
Summary: Growing awareness of the environmental impact has led to considerations of a circular economy and renewable energy in the chemical industry. This article discusses the potential of electrochemically generated hydrogen and all-electrochemical synthesis to achieve more sustainable ammonia production. It also evaluates different strategies for electrochemical C-N functionalization, particularly electrophilic nitration, and highlights the possibility of using ammonia and atmospheric nitrogen for electrochemical nitration. The importance of alternative nitrogen sources in fine chemical production is emphasized.
Article
Chemistry, Physical
Gibson P. Scisco, Mark E. Orazem, Kirk J. Ziegler, Kevin S. Jones
Summary: The capacitances of electrochemical systems determined from cyclic voltammetry (CV) are affected by the constant-phase element (CPE) behavior, which can be illustrated by simulated circuits. The capacitance extracted from CV follows a power law relationship with sweep rate, and a critical sweep rate can be defined by comparing CV-obtained capacitance with that from electrochemical impedance spectroscopy (EIS) data, allowing for an effective time constant formulation for the circuits. Sweep rates at least two orders of magnitude below the critical rate should be used in CV to mitigate the influence of the system's time constant on the measured capacitance. Reporting CPE parameters R, Q, and alpha is recommended for more accurate comparisons of supercapacitors rather than capacitance vs. sweep rate data from CV measurements.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Analytical
Marta Choinska, Vojtech Hrdlicka, Hana Dejmkova, Jan Fischer, Ludek Mika, Eva Vaneckova, Viliam Kolivoska, Tomas Navratil
Summary: This manuscript investigates the chemical and structural stability of 3D printing materials commonly used in electrochemistry, providing comprehensive information for the use of these materials in electrochemical platform manufacturing through the study of their properties changes after exposure to solvents and electrolytes.
Article
Chemistry, Physical
K. Silambarasan, S. Harish, K. Hara, J. Archana, M. Navaneethan
Summary: In this study, N-GQD@MoS2@rGO nanocomposite material was synthesized and its morphology, chemical composition, and electrochemical properties on dye-sensitized solar cells were investigated. The results from cyclic voltammetry analysis and photovoltaic power conversion efficiency measurement indicated that N-GQD@MoS2@rGO exhibited superior catalytic performance compared to other materials.
Article
Engineering, Environmental
Tuo Wang, Mei Chen, Jiaxuan Zhu, Nan Li, Xin Wang
Summary: Biological nitrogen removal in low C/N environment has long been a challenge in wastewater treatment. Autotrophic ammonium oxidation is a promising method that does not require carbon source addition, but alternative electron acceptors need further investigation. The use of microbial electrolysis cells (MECs) with a polarized inert electrode has been proven effective in ammonium oxidation. This review consolidates recent advances in anodic ammonium oxidation in MECs, covering various technologies, functional microbes, and influencing factors. It also discusses the challenges and prospects of anodic ammonium oxidation in ammonium-containing wastewater treatment, providing valuable insights and technological references for MECs.
Article
Chemistry, Analytical
Amivi Felicite Amoudji, Sylvie Arpigny, Philippe Moisy, Fethi Bedioui
Summary: The electrochemical behavior of the Ce(IV)/Ce(III) redox couple in pure N,N-dialkyl amides was investigated in this study. The results show that the functionalities of the extractants have the same relative effect on both oxidation states of the cerium cation. This research opens the door for further investigations in this field.
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)