edgepedia

Physical world and mathematics

42,772 articles

Electro-oxidation

Electro-oxidation (EO) is an electrochemical method that applies a potential to an electrode to generate oxidizing species such as hydroxyl radical, used for organic electrosynthesis and degrading pollutants in water and wastewater.

Electro-swing adsorption

Electro-swing adsorption (ESA) is a carbon capture process in which electricity, rather than heat or pressure, drives the switch between adsorption and desorption of CO₂, covering Joule-heated sorbents and faradaic electrochemical cells.

Electro-swing carbon capture

Electro-swing carbon capture is a family of CO2 separation methods driven by electrochemical changes rather than heat or pressure, spanning faradaic reactive adsorption and electric swing adsorption.

Electro-swing CO2 capture

Electro-swing CO2 capture is a family of carbon capture methods in which a solid electrode adsorbs CO2 when negatively charged and releases it when the charge is reversed.

Electroanalytical methods

Electroanalytical methods, also called electroanalytical chemistry, are analytical techniques that measure potential, current, charge, or conductance in an electrochemical cell to determine a sample's composition.

Electrocaloric effect

The electrocaloric effect is the reversible heating and cooling of a ferroelectric material when an electric field is applied or removed, studied as the basis of solid-state refrigeration without conventional refrigerants.

Electrocarboxylation

Electrocarboxylation, also called electrochemical carboxylation, is an organic electrosynthesis method that electrochemically fixes carbon dioxide into organic substrates at a cathode, forming carbon–carbon bonds and yielding carboxylic acids.

Electrocatalysis

Electrocatalysis is the catalysis of electron-transfer reactions at electrode–electrolyte interfaces, including hydrogen evolution, oxygen evolution, and CO2 reduction, underpinning fuel cells, water electrolyzers, and electrosynthesis. Quantitative study began with Haber's 1898 book.

Electrocatalytic C–H activation

Electrocatalytic C–H activation is the conversion of inert carbon–hydrogen bonds in an electrochemical cell, where electrons from a circuit replace the stoichiometric oxidants conventional methods consume.

Electrocatalytic carbon dioxide reduction

Electrocatalytic carbon dioxide reduction (CO2RR) is an electrochemistry method that uses electric current and a catalyst to convert CO2 into chemicals such as ethylene and ethanol.

Electrocatalytic depolymerization

Electrocatalytic depolymerization is the breakdown of polymers like nylon, PET, and polystyrene into monomers or valuable chemicals using electrode potentials instead of heat or harsh reagents.

Electrocatalytic glycerol valorization

Electrocatalytic glycerol valorization is the electrochemical conversion of glycerol, the main biodiesel byproduct, into valuable chemicals like dihydroxyacetone, lactic acid, and formic acid, often paired with hydrogen production.

Electrocatalytic hydrodefluorination of PFAS

Electrocatalytic hydrodefluorination of PFAS is a water-treatment approach in which a cathode under negative potential replaces fluorine on PFAS with hydrogen, cleaving strong carbon–fluorine bonds reductively.

Electrocatalytic hydrogen evolution reaction

The electrocatalytic hydrogen evolution reaction (HER) is the cathodic half-reaction of water splitting, where catalysts at an electrode produce hydrogen gas and set the electrolyzer's efficiency.

Electrocatalytic nitrate-to-ammonia

Electrocatalytic nitrate-to-ammonia, abbreviated eNO₃RR or NO₃RR, is an electrochemical process that reduces nitrate ions in water to ammonia at a cathode under ambient temperature and pressure, cleaning polluted water while recovering ammonia for fertilizer.

Electrocatalytic nitrate-to-ammonia conversion

Electrocatalytic nitrate-to-ammonia conversion is an electrolytic process that reduces nitrate ions in water to ammonia at a catalyst electrode under ambient temperature and pressure, combining wastewater remediation with ammonia production using renewable electricity.

Electrocatalytic oxidation

Electrocatalytic oxidation is an electrochemical method that oxidizes substrates at a catalytic anode surface, serving chemical synthesis, wastewater remediation, and energy-saving electrolysis with hydrogen at the cathode.

Electrocatalytic oxygen evolution reaction

The electrocatalytic oxygen evolution reaction (OER) is the anodic oxidation of water releasing oxygen gas, the sluggish bottleneck of water electrolysis and its main energy loss.

Electrocatalytic oxygen reduction to hydrogen peroxide in flow reactors

Electrocatalytic oxygen reduction to hydrogen peroxide in flow reactors is the continuous on-site production of H2O2 by reducing oxygen at a cathode in an electrochemical flow cell.

Electrocatalytic urea synthesis from CO2 and nitrate

Electrocatalytic urea synthesis from CO2 and nitrate is an electrochemical route that co-reduces carbon dioxide and nitrate ions into urea at ambient temperature and pressure.

Electrocatalytic water oxidation

Electrocatalytic water oxidation, the oxygen evolution reaction (OER), is the anodic half-reaction of water splitting, in which an electrode catalyst oxidizes water to oxygen gas and limits electrolyzer efficiency.

Electrochemical amination

Electrochemical amination is the use of electricity at electrode surfaces to form carbon–nitrogen bonds, best known through the nickel-catalyzed e-amination reported by Phil Baran's group in 2017.

Electrochemical Birch reduction

The electrochemical Birch reduction is a cathodic method that dearomatizes arenes to 1,4-cyclohexadienes using electrode electrons instead of pyrophoric alkali metals in cryogenic liquid ammonia.

Electrochemical C–H amination

Electrochemical C–H amination is a class of organic electrosynthetic reactions that converts carbon–hydrogen bonds into carbon–nitrogen bonds using electrode-supplied electricity instead of stoichiometric chemical oxidants.

Electrochemical C–H functionalization

Electrochemical C–H functionalization is a set of organic synthesis methods that convert carbon–hydrogen bonds into new carbon–carbon or carbon–heteroatom bonds using electrons at electrodes in place of chemical oxidants.

Electrochemical C–H oxidation

Electrochemical C–H oxidation is a synthetic method in which carbon–hydrogen bonds are oxidized at an electrode, with electric current replacing stoichiometric chemical oxidants for sustainable bond formation.

Electrochemical C–N coupling

Electrochemical C–N coupling is the electrocatalytic formation of carbon–nitrogen bonds from small-molecule feedstocks like CO₂, N₂, and nitrate into value-added products such as urea and amines.

Electrochemical carbon capture

Electrochemical carbon capture is a family of methods in which electric current, rather than heat, drives the capture and release of CO2 from flue gas, air, or seawater.

Electrochemical carboxylation

Electrochemical carboxylation, also called electrocarboxylation, uses electrochemical reducing power, typically at a cathode, to install carbon dioxide as a carboxyl group onto organic substrates, giving carboxylic acids under mild conditions.

Electrochemical carboxylation using captured CO2

Electrochemical carboxylation using captured CO2, also called electrocarboxylation, is a synthesis method that fixes CO2 recovered from emissions into organic substrates, forming carbon-carbon bonds and yielding carboxylic acids.