Three-dimensional electro-Fenton oxidation of N-heterocyclic compounds with a novel catalytic particle electrode: high activity, wide pH range and catalytic mechanism

Abstract

A novel three-dimensional (3D) heterogeneous electro-Fenton (EF) system with sludge deserved activated carbon from sewage and iron sludge (SAC-Fe) as catalytic particle electrodes (CPEs) was constructed in this study.

Detection of Reactive Oxygen Species in Anion Exchange Membrane Fuel Cells using In Situ Fluorescence Spectroscopy

“…The hydrogen peroxide (H 2 O 2 )f ormedo nc arbon,w hich is ac atalystf or the twoelectron reduction of oxygen, [3] further decomposes to yield the superoxide anion radical( O 2 C À )i nt he presenceo fm etal ion impurities by the Fenton mechanism. [9][10][11] O 2 C À has al ong half-life in the highly alkaline environment prevalent in the AEM and can cause significant oxidative damage to the membrane. [7,8] Notably,h ydroxyla nd hydroperoxyl radicals are generated at low pH, whereas the superoxide anion radicali sf avored at high pH.…”

“…[7,8] Notably,h ydroxyla nd hydroperoxyl radicals are generated at low pH, whereas the superoxide anion radicali sf avored at high pH. [9][10][11] O 2 C À has al ong half-life in the highly alkaline environment prevalent in the AEM and can cause significant oxidative damage to the membrane. [12] Therefore, it is essential to develop am ethodf or detecting/quantifying O 2 C À formation in operating AEMFCs.…”

A novel bio-electro-Fenton system with dual application for the catalytic degradation of tetracycline antibiotic in wastewater and bioelectricity generation

“…30 Especially, electro-Fenton process (EF) is one of the most common electrochemical advanced oxidation processes (EAOP) with high efficiency and strong degradation capacity that has attracted considerable attention. 31,32 Notably, in this process, homogeneous free cOH can be generated via the fundamental chemical reaction between in situ electrogenerated hydrogen peroxide (H 2 O 2 ) and ferrous ions (Fe 2+ ) to degrade or mineralize a wide variety of organic pollutants into non-toxic or low molecular weight compounds. 12,33,34 However, applying external energy in EF process can result in high operating costs, particularly if complete mineralization is required.…”

Nitrogen-Doped Graphene Iron-Based Particle Electrode Outperforms Activated Carbon in Three-Dimensional Electrochemical Water Treatment Systems

“…The presence of iron components in graphene-based catalysts on the other hand could promote the electro-Fenton (EF) process, which is important for hydroxyl radical production [43][44][45][46]. This can cause a significant increase in the synergy of the process.…”