Recent advances in electrocatalysts for halogenated organic pollutant degradation

Abstract

Advanced electrocatalysts for halogenated organic pollutant degradation.

Insights into Electroreductive Dehalogenation Mechanisms of Chlorinated Environmental Pollutants

“…Besides, some other strategies like optimizing the operating parameters are also proved to useful in mitigating the HER process. More information can refer to the recent reviews …”

Metallic nanoparticles for electrocatalytic reduction of halogenated organic compounds: A review

“…Alternatives have been developed to tackle this issue, especially advanced oxidation processes (AOPs), which are based on the generation of highly reactive and unselective radicals, typically hydroxyl radicals (•OH). Among them, photocatalytic oxidation [3], Fenton oxidation [4], sonoelectrochemical treatments [5] and electrooxidation [6,7] have been throughly studied in the past, showing promising results for the degradation of POPs in both synthetic and real effluents. Despite the very strong oxidative power of hydroxyl radicals (E 0 (•OH/H 2 O) = 2.80 V vs SHE [8]), the complete mineralization of the effluent can be challenging to achieve due to the formation of more resistant by-products, therefore significantly increasing the time and cost of treatment [9].…”

High chlorine evolution performance of electrochemically reduced TiO2 nanotube array coated with a thin RuO2 layer by the self-synthetic method

“…The electrochemical oxidation process (EOP) has emerged as an alternative to the conventional oxidation process because of its relatively simple facilities, maintenance, and accessibility. [1][2][3][4][5][6][7][8] In addition, as the need for a decentralized water treatment system has increased, the spectrum of EOP's application is broadening from urban to rural areas and developing countries. 2,4,[9][10][11] The process controls contaminants by generating oxidants on-site.…”

“…In particular, chlorine (Cl 2 ) has been widely used to remove microorganisms, organic matters, and ammonia effectively along with other oxidants such as ozone, hydroxyl, and sulphate radicals. 1,4,5,10,[12][13][14][15][16] The generated Cl 2 diffuses to the bulk solution (below eqn (1)-( 3)), and they exist three major species including Cl 2 (pH < 3), HOCl (pH 3-8), and OCl À (pH > 8). 1 2Cl À / Cl 2(aq) + 2e À (E 0 ¼ 1.36 V vs. NHE)…”