Electrochemistry - Science topic

In this article, the possibility for ibotenic acid and muscimol electrochemical determination on the electrode, modified by nano-CuS/conducting polymer composite, is theoretically described. The analytical signal is based on the reaction of the copper (III) sulfohydroxide with both of the analytes, and the reaction is realized by two parallel scena...

ATK was investigated to ascertain its IE(%) on ASTM A36 MS corrosion in a HCl medium. This was possible through the use of WL, Td, Tm, PDP, EIS and SEM techniques. It was seen from all experimental results that, through adsorption onto the MS surface, ATK mitigated active corrosion sites. CR was seen to decrease with higher inhibitor Ct from 197.6...

The effective inhibition of MS corrosion in H2SO4 by CP and CP + KI was assessed by EIS. SM of MS was studied using SEM and AFM. The rise in Rct and decrease in Cdl, with higher C of CP and CP + KI, confirmed MS CI. IE(%) increased with higher C of CP only and CP + KI (from 10-3 to 10-1 M). CP maximum IE(%) was 93.9%, at 10-1 M. CP + KI, due to I-i...

For the first time, sucralose cathodic electrochemical determination, assisted by the safranin-modified electrode in acidic solutions, has been theoretically described. The correspondent mathematical model analysis has shown that the steady-state stability range is wider than in most systems of electrochemical determination over the pyridinic nitro...

Nanoporous carbons have emerged as promising materials for a wide range of energy-oriented applications, particularly in the rapidly evolving and interconnected fields of hydrogen (H2) and electrochemical energy storage. This Special Issue brings together cutting-edge research on the design, synthesis, characterization and application of nanoporous...

The electrochemical determination of sotolone in basic media over an undoped conducting polymer has been described for the first time. The alkaline hydrolysis, breaking the furanonic ring, leads to the appearance of an acid ion, entering the polymer matrix as a dopant. The stability analysis of the system, made by the development and investigation...

The sluggish kinetics of sulfur conversions have long been hindering the implementation of fast and efficient sulfur electrochemistry in lithium–sulfur (Li–S) batteries. In this regard, herein the unique chromium boride (CrB) is developed via a well‐confined mild‐temperature thermal reaction to serve as an advanced sulfur electrocatalyst. Its inter...

Various strategies have been devised to enhance the specific capacity (over 372 mA h g−1) and the cycle life of pure carbon-based anode materials for lithium-ion batteries (LIBs). Herein, we have prepared carbon nanobeads (CNBs) with inner onion-like carbon layer structures using chemical vapor deposition. Additionally, mesophase-pitch-based graphi...

This study focuses on the computational characterization of electrochemical C-C bond formation through the CO and CHO coupling process utilizing a dioxo-coordinated Cu single atom site ([CuO2]*) supported on a Pd(111) surface. The stable intermediate, [CuO2]*(CO)2, was identified as a tetradentate-and-tetrahedral species formed upon exposure to CO...

This book thoroughly investigates the pivotal role of Energy Storage Systems (ESS) in contemporary energy management and sustainability efforts. Starting with the essential significance and historical background of ESS, it explores distinct categories of ESS and their wide-ranging uses. Chapters discuss Thermal, Mechanical, Chemical, Electrochemica...

Despite tremendous efforts that have been dedicated to high‐performance electrochemical energy storage devices (EESDs), traditional electrode fabrication processes still face the daunting challenge of limited energy/power density or compromised mechanical compliance. 3D thick electrodes can maximize the utilization of z‐axis space to enhance the en...

Chloroethenes are globally prevalent groundwater contaminants. Since 2014, TCE has been shown to be degradable in an aerobic metabolic process where it is used as sole energy source and growth substrate by a mixed bacteria culture (SF culture). In 2019, the SF culture was shown to be successfully used in bioaugmentation approaches under field-relev...

The effect of graphite powder on the machining characteristics in graphite-powder-mixed electrochemical discharge machining of microholes was still not clear. How the discharge mechanism changed with the addition of graphite powder into the electrolyte, which further led to changes in the morphology of the machined holes, remained to be revealed. I...

This study investigated the role of SiC as a reinforcement on microstructure, corrosion, and electrochemical properties of Cu/xSiC (x = 0, 5, 10, 15, 20, 25, and 30 vol% SiC) composites. The powder metallurgy route was used to fabricate Cu/SiC composite. The distribution of SiC reinforcing particles in the Cu matrix and their interfaces were invest...

The concomitant degradation of organic contaminants using green oxidants, NaClO and O3, exhibits great potential to mitigate the deleterious impact of organic pollutants. In this work, the electrochemical ozone production (EOP) and chlorine evolution reaction (CER) performed by highly active electrocatalysts composed of Ce‐Ni‐Sb‐SnO2 and Ru‐Ir‐Ce‐N...

Experimental determination of thermodynamic quantities can be very simple, but some suggested procedures can be complicated and cumbersome. They can be almost impossible in the student’s laboratory in chemistry education. Electrochemistry provides easy and simple access to those data for chemical reactions which can be executed in an electrochemica...

Metal–organic frameworks (MOFs) have important research value in the field of electrochemical CO2 reduction reaction because of their rational design. Here, a new MOF-CH3 was prepared via a simple solvothermal method by using Zn as the metal center and 1,2,4-triazole and 2-methyl-terephthalic acid as ligands for electrocatalytic CO2 reduction. The...

The effect of barley seed extracts on the corrosion of carbon steel in 1M hydrochloric acid at different temperatures was investigated from the perspective of their potential use as green inhibitors in the cleaning and descaling processes in heat exchangers. A 50% ethanol/water (vol) solution was used for extraction. Two extraction methods were use...

The electrocarboxylation of α,α-dichloroarylmethane derivatives in the presence of CO2 was achieved, providing several α-chloroarylacetic acid derivatives with modest yields but high selectivity (chlorinated vs. non-chlorinated or dicarboxylic acid products). The obtained products were then involved in several chemical transformations, underlining...

Electrochemistry is an essential context for understanding current energetic technological processes, especially those that use batteries. On the other hand, it is one of the most neglected subjects in the classroom for reasons of associated complexity. Because of this, we have sought new methodological strategies to overcome the difficulties encou...

The Li-excess disordered rock salt cathode material, Li1.2Ni0.2Ti0.6O2, was synthesized via the sol–gel method to investigate the impact of different sintering temperatures on its structure, morphology, and electrochemical performance. X-ray diffraction (XRD) analysis revealed a cubic rock salt structure for the material. Raman spectroscopy indicat...

Ammonia (NH3) plays a significant role in the manufacture of fertilizers, nitrogen-containing chemical production, and hydrogen storage. The electrochemical nitrogen reduction reaction (e-NRR) is an attractive prospect for achieving clean and sustainable NH3 production, under mild conditions driven by renewable energy. The sluggish cleavage of N≡N...

Electrochemical discharge machining (ECDM), as a new type of non-traditional machining method, is widely used in the machining of insulating hard and brittle materials such as glass and ceramics. However, there are some problems such as difficulty in circulating electrolyte, resulting in poor quality machining of deep and small holes. In this paper...

Tungsten carbide inserts (TCI) and polycrystalline diamond compact (PCD) cutters used in two types of drill bits for drilling oil and gas wells were evaluated by a pin-on-disc test. The morphology of the worn surface was characterized by scanning electron microscopy (SEM). The behavior of corrosion resistance was evaluated with the electrodynamic p...

The Li4Ti5−xAlxO12 samples with tremella-shape were synthesized via a hydrothermal method at 550 °C and used as anode material in lithium-ion batteries. The XRD results revealed all as-prepared Li4Ti5−xAlxO12 samples had the structure and chemical component of standard spinel Li4Ti5O12, and the tremella-shape morphology of the Li4Ti5−xAlxO12 sample...

Supercapacitors offer superior energy storage capabilities than traditional capacitors, making them useful for applications such as electric vehicles and rapid large‐scale energy storage. The energy storage performance of these devices relies on electrical double‐layer capacitance and/or pseudocapacitance from rapid reversible redox reactions. Meta...

The importance of biomarker quantification in technology cannot be overstated. It has numerous applications in medical diagnostics, drug delivery, and the timely implementation of prevention and control strategies for highly prevalent diseases worldwide. However, the discovery of new tools for detection has become increasingly necessary. One promis...

Landfill leachate is a complex mix of organics, inorganics and heavy metals produced from conventional and engineering landfilling practices. The adverse effects of landfill leachate on human and environmental health have forced the relevant authorities to stipulate stringent disposal requirements, producing the need for ground-breaking technologic...

Four different Mn and Re catalysts for electrochemical CO2 reduction have been studied by IR spectroelectrochemistry (SEC) in dry acetonitrile. In the case of Mn(apbpy)(CO)3Br (apbpy= 4(4-aminophenyl)-2,2’-bipyridine) SEC suggests that a very slow catalytic reduction of CO2 occurs in acetonitrile also in the absence of proton donors, but at rather...

This work introduces a comprehensive hydrogen electrolyzer (HE) load modelling framework suitable for general steady-state power system studies such as power flow and optimal power flow. The proposed model captures all relevant nonlinear physical features and operational constraints of the electrolysis stack and downstream hydrogen (H2) system. Mor...

In questo studio, viene presentato il primo monitoraggio su larga scala per verificare le differenze tra i più importanti prodotti carnei consumati in Italia, relativamente ai livelli di nitriti e nitrati presenti al momento della commercializzazione. Il monitoraggio ha considerato un totale di 300 campioni, suddivisi in 13 tipologie diverse di pro...

A direct electrochemical amidation of xanthene was readily achieved under direct anodic oxidation. The reactivity of benzamides was significantly enhanced by the virtue of solvent effect of hexafluoroisopropanol (HFIP). An obvious hydrogen bonding between HFIP and benzamide was detected, and the proton-coupled electron transfer (PCET) effect was pr...

Liquid phase deposition is a cost-effective and energy-efficient method for obtaining TiO2 films at low temperatures. This work demonstrates the use of a multifunctional template consisting of grafted gallic acid (GA) and hexamethylenediamine (HD) on a Ti substrate to regulate the deposition of TiO2 films. X-ray diffraction characterization shows t...

The urgent need for efficient energy storage devices (supercapacitors and batteries) has attracted ample interest from scientists and researchers in developing materials with excellent electrochemical properties. Electrode material based on carbon, transition metal oxides, and conducting polymers (CPs) has been used. Among these materials, carbon h...

This study reports the use of an inorganic corrosion inhibitor to mitigate dissolved CO2-induced corrosion. Using electrochemical techniques (polarization curves, open circuit potential, polarization resistance, and electrochemical impedance), the effect of adding Nd3+ ions on the corrosion resistance of X52 steel immersed in CO2-saturated brine at...

Nitinol shape memory alloy (SMA) is a difficult material to machine due to its toughness. The current research work demonstrates how two different electrolytes affect the electrochemical behavior in relation to electrochemical machining performance of nitinol. Potentiodynamic polarisation and electrochemical impedance spectroscopy tests have been c...

In this work, the experimental current collector based on a reticulated vitreous carbon (RVC®) matrix modified with copper and lead was obtained and examined for usage as the current collectors of lead-acid batteries. The collectors under investigation were obtained using galvanic methods. Electrochemical tests of the obtained collectors were carri...

During electrochemical discharge drilling (ECDD), tool electrode bending and debris accumulation easily lead to secondary discharges and instability, which will affect the removal of recast layers. To improve the stability and processing quality of the machining process, a novel vibration-assisted electrochemical discharge drilling (VAECDD) method...

By utilizing hydrogen as an eco-friendly energy source, many metals are exposed to gaseous (pressurized) hydrogen. High-strength steels with an ultimate tensile strength of 800 MPa and above are especially susceptible to hydrogen-induced fracturing, also referred to as hydrogen embrittlement (HE). Both the microstructure and phase fractions within...

The aim of the present study was to prepare ZrFe2 and ZrFe1.8Ni0.2 intermetallic compounds by FFC Cambridge process. The intermetallic compounds were prepared directly from the mixed oxide precursors, namely ZrO2-Fe2O3 and ZrO2-Fe2O3-NiO, respectively. Electrochemical de-oxidation experiments were carried out with mixed oxide pellet cathode and HD...

Proton–electron transfer (PET) reactions are rather common in chemistry and crucial in energy storage applications. How electrons and protons are involved or which mechanism dominates is strongly molecule and pH dependent. Quantum chemical methods can be used to assess redox potential (Ered.) and acidity constant (pKa) values but the computations a...

Affinity-based organic electrochemical transistor (OECT) sensors offer an attractive approach to point-of-care diagnostics due to their extreme sensitivity and easy operation; however, their application in the real world is frequently challenged by the poor storage stability of antibody proteins and the interference from biofouling in complex biofl...

Electrochemical energy storage technology has attracted widespread attention due to its low cost and high energy efficiency in recent years. Among the electrochemical energy storage technologies, sodium ion batteries have been widely focused due to the advantages of abundant sodium resources, low price and similar properties to lithium. In the basi...

Supercapacitor with high energy density is highly desired for wearable and flexible smart electronics. For the development of polyaniline-based supercapacitors, it is crucial to improve the long-term stability and specific capacitance. Herein, carbon cloth is etched by metal (oxy)hydroxides to obtain the etched porous carbon cloth (EPCC) for the su...

This work demonstrates the successful additive manufacturing of an in situ-alloyed CoCrFeNi HEA with a single phase (FCC) structure via the laser metal deposition (LMD) technique. In this work, bulk specimens of the CoCrFeNi high entropy alloy (HEA) of size 15 mm × 15 mm × 45 mm were additive-manufactured (AMed). An H320-type additive-subtractive m...

Manganese-based layered oxides are prospective cathode materials for sodium-ion batteries (SIBs) due to their low cost and high theoretical capacities. The biphasic intergrowth structure of layered cathode materials is essential for improving the sodium storage performance, which is attributed to the synergistic effect between the two phases. Howev...

Electrochemical DNA-Aptasensors are gaining increasing popularity for the recognition of numerous analytes ranging from tiny molecules to entire microorganisms due to their multiple benefits over antibody-based biosensors. However, the reliable determination of aptamer probe density in DNA-Aptasensors is a potential barrier to ensuring their qualit...

A perspective on the teaching of electrochemistry for science and engineering students is discussed followed by the elements and components of a wide-ranging course that can be adapted to the needs of each science and/or engineering students and, indeed, the scientific community and society at large. For all, there is a pressing need to be able to...

Electrocatalytic reduction of CO2 to valuable chemicals can alleviate the energy crisis, and solve the greenhouse effect. The key is to develop non-noble metal electrocatalysts with high activity, selectivity, and stability. Herein, bimetallic metal organic frameworks (MOFs) materials (BiZn-MOF, BiSn-MOF, and BiIn-MOF) were constructed by coordinat...

LiNi0.6Co0.2Mn0.2O2 cathode material has been widely studied by researchers due to its high capacity, but its further development is restricted by low rate capacity, poor interface stability, and poor structural stability. Nb-Cl co-doped LiNi0.6Co0.2Mn0.2O2 cathode materials were prepared by solid-phase method. Structural analysis revealed that Nb...