Nitrogenases accomplish the energetically challenging reduction of nitrogen to produce ammonia under mild conditions. Co-immobilization of both components of the Mo-nitrogenase from Azotobacter vinelandii on porous low-density graphite electrodes has allowed studying the electroenzymatic ammonia production in absence of any redox mediator. The entrapment of both nitrogenase proteins in an electrode

The uniform thickening of high aspect ratio (AR) through-holes (HAR-TH, AR: 10∼12:1) by Cu electronic plating (Cu-EP) is essential in printed circuit boards fabrication, and is often accomplished with organic levelers and at low current densities (6∼15 mA/cm2). Nevertheless, the organic levelers are often unstable and the Cu-EP at low current densities presents low production efficiency. In this study

The development of materials to replace precious metal catalysts is key to achieving energy conversion at low cost. In this paper, a series of bifunctional catalysts based on 3d transition metal (TM) atoms and transition metal sulfide (TMD) heterojunctions with single-atom catalysts (SACs) based on density-functional theory (DFT) are reported. Oxygen electrocatalyst activity and stability were evaluated

Closed bipolar cells (cBPCs) play a crucial role in electrochemical applications by enabling redox reactions at both ends of a bipolar electrode (BPE) without requiring direct wiring to an external power source. This feature is particularly advantageous in electroanalytical systems utilizing electrochemiluminescence (ECL), allowing for the independent optimization of the electrolytes in the sample

The electron transfer reaction is pivotal in several branches of science, ranging from electrochemistry to catalysis. A suitable model system to inspect to the nature of reactants and products during a charge transfer reaction is made by a redox couple dissolved in a solvent. A typical example is made by [Fe(CN)6]3-/[Fe(CN)6]4- in water. Recently, it has been proposed that the charge transfer process

The cobalt (Co)-free and lithium (Li)-rich manganese (Mn)-based oxides, possessing a low manufacturing cost and a high energy density, have been regarded as competitive cathodes for high-performance lithium-ion batteries (LIBs), yet still confronted with ambiguous synthesis routes/conditions and fast capacity/voltage decays. Herein, the unique high-nickel (Ni) and Li-rich Mn-based oxides in the composition

Spinel structures are promising cathodes for Lithium-ion batteries due to good functional performance and sustainability. LiMn2O4 is the most investigated composition, despite some drawbacks: i) Jahn-Teller distortion involving Mn (III), and ii) partial dissolution of Mn (II) upon cycling. Here, we report on spinel compositions (LiMxMn1-xO4) where Mn is partially substituted by Fe (III) to decrease

O3-type NaNi1/3Fe1/3Mn1/3O2 is considered as one of the most promising cathode candidates for sodium-ion batteries due to its high specific density and low cost. However, rapid capacity degradation and sluggish diffusion kinetics, caused by structural distortions and irreversible phase transitions, present significant challenges to its commercial application. In this study, we design a series of O

The slow dynamics on the air cathode side of zinc-air batteries and the high overpotential severely hinder their commercial development. This urgently requires a significant improvement in the kinetics of the cathodic oxygen reduction reaction (ORR) and enhancement of the catalyst's ORR/OER catalytic performance. Here, a novel ORR/OER bifunctional catalyst, CoCu-NC with excellent hydrophobicity, is

Electrochemical technologies, specifically capacitive deionization, are a robust, emerging and energy-efficient wastewater treatment process for effectively eradicating heavy metals and desalting saline water streams. The performance of electrosorption-based ion removal explicitly depends on the nature of electrode materials. In this research, activated carbon (AC) derived from palm kernel shell (PKS)

This study fabricated an effective cathode (Fe/Zn/BSR@CF), using Fe/Zn co-doped biochar from waste soybean residue (WSR) as the cathodic reactive component. In the electro-Fenton system equipped with the fabricated cathode, the tetracycline (TC) removal efficiency reached 93.86% within 150 min, and total organic carbon (TOC) mineralization efficiency obtained 70.73% within 6 h. The excellent cathodic

Transition metal oxides with low cost and good redox properties are excellent candidates for supercapacitor electrode materials. Herein, we present the synthesis of MOF-derived dual transition metal oxide heterojunction nanostructures (NiO/V2O3/C) via hydrothermal and thermal processes. The influence of different ligands and thermal conditions on the electrochemical performance of the resulting materials

The nickel-rich layered cathode material LiNi0.80Co0.15Al0.05O2 (NCA) is widely used in lithium-ion batteries because of its reversible capacity and high energy density. However, the interfacial reactions and structural phase transitions arising from its high voltage can limit the cycle life and need to be addressed. In this work, a series of V2O5 coated NCA materials is prepared, the introduction

Anion exchange membranes (AEMs) are promising materials for electrochemical systems due to their compatibility with alkaline environments, enabling cost-effective use of non-precious metal catalysts. However, alkaline stability of cationic functional groups remains a key challenge. In this study, polysulfone-based AEMs were synthesized with two ammonium functional groups: trimethylammonium (TMA) and

The complex perovskite type proton-conducting materials Ba3Ca1.18Nb1.82O9-δ (BCN18) and Ba3Ca1.18Nb1.72Y0.1O9-δ (BCNY) were fabricated via a solid-state synthesis route. Structural characterization of both compounds was performed through X-ray diffraction analysis (XRD). The microstructure of BCN18 and BCNY were carried out by scanning electron microscopy (SEM). The electrochemical properties were

Although there has been a lot of work towards the development of urea sensors, work towards the development of non-invasive or minimally invasive biosensors for personal healthcare remains scarce. Microneedle (MN)-based diagnostic presents a new avenue in personalized healthcare monitoring by utilizing interstitial fluid (ISF) as a biofluid and a viable alternative to conventional blood-based diagnostics

Electrodeposited nickel, cobalt, and their alloys are critical for applications including energy storage, electrocatalysis and magnetic devices. Traditional aqueous electrodeposition suffers from hydrogen evolution, causing embrittlement, while deep eutectic solvents (DES) offer a promising alternative owing to their low water activity. Here, amino acid-metal nitrate DES (Ni(NO3)2 and/or Co(NO3)2-L‑serine)

This review presents a comprehensive overview of the emerging field of ionic liquid/metal-organic framework (IL/MOF) composites, which synergistically combine the unique properties of two material families, ILs and MOFs, for adsorption- and membrane-based gas separation applications. ILs, with their low volatility and tunable chemical properties, enhance the functionality of MOFs, which are highly

Localised corrosion is the result of complex heterogeneous electrochemical processes occurring on metal surfaces. Localised corrosion control is one of the most difficult issues in corrosion science and engineering. This study reports a new approach to exploring effective and environmentally friendly localised corrosion inhibitors through local electrochemical measurements using multielectrode array

Thin and robust polybenzimidazole membranes are reinforced using polybenzimidazole fiber mats. The fiber mats are prepared by electrospinning followed by thermal curing to enhance their dimensional and structural stability in phosphoric acid. These properties are evaluated through solubility tests in dimethylacetamide and swelling tests by phosphoric acid doping. The fiber reinforced membranes are

Lithium iron phosphate batteries are considered one of the most popular power sources for electric vehicles and storage systems because of their excellent safety and cycle life. However, when degradation occurs, battery performance becomes unreliable. Thus, accurate identification of the battery performance during the long cycle is especially important. In this paper, the performance of LiFePO4/graphite

The primary limitation associated with oil extraction through pressing is the considerable amount of residual oil in the cake. Therefore, this study focused on employing ultrasound waves to decrease the oil content in camelina seeds. For this purpose, three ultrasound treatment durations (15 to 45 min) were applied, and oil was immediately extracted from the seeds using a screw press at varying speeds

This study presents an evaluation of the FCNTs@CoS2 composite for supercapacitor applications through a comprehensive analysis involving theoretical computations and electrochemical measurements (cycle voltammetry, or CV, and galvanostatic charge-discharge, or GSCD). The structural characteristics and morphology of the synthesized FCNTs@CoS2 composites were examined using X-ray diffraction (XRD), scanning

In this study, tin (Sn) nanoparticles are demonstrated to effectively catalyze the reduction of CO2 to formate in an alkaline medium. Catalytically active Sn-based nanoparticles, supported on carbon black (Sn/C) and highly conductive graphene nanosheets (Sn/GN), present a promising approach to mitigating atmospheric CO2 emissions when integrated with capture technologies. Cyclic voltammetry and electrochemical