High-loading of well dispersed single-atom catalysts derived from Fe-rich marine algae for boosting Fenton-like reaction: Role identification of iron center and catalytic mechanisms

Highly Efficient and Selective Degradation of Electron-Rich Organic Pollutants in a Co-CN/Peroxymonosulfate System via the Synergistic Interaction of Regulating the Active Site and Producing Singlet Oxygen

“…4,5 In comparison, singlet oxygen ( 1 O 2 ) generated in the nonradical pathway has a long lifetime of approximately 4− 6 μs and is favorable for adequate mass transfer between organic pollutants and PMS. 6 Furthermore, 1 O 2, with an unoccupied π * orbital, has a high affinity and selectivity for pollutants. 7,8 The degradation process avoids the formation of toxic halogen intermediates, and 1 O 2 is also rarely affected by aqueous organic matter with wide pH tolerance.…”

“…Carbon materials for PMS activation are often reported through 1 O 2 -based nonradical degradation pathways. 12,13,14 For example, Shao et al synthesized nanodiamonds that can effectively activate PMS to generate 1 O 2 , and the production of 1 O 2 was correlated with the presence of carbonyl groups. 15 Recently, it has been found that a high nitrogen doping level (14.5 at%) of carbon materials promotes 1 O 2 generation for PMS activation through carbon atoms adjacent to graphitic nitrogen as active sites.…”

“…Emerging electron-rich organic contaminants (EROCs), such as carbamazepine, bisphenol A, and sulfonamide antibiotics, are refractory and resistant to conventional wastewater treatment technologies. Advanced oxidation processes (AOPs) based on peroxymonosulfate (PMS) activation have recently been widely studied for EROC degradation. , EROCs are degraded by PMS activation with nonradical active species or radical reactive oxygen species (ROS) . Among them, hydroxyl radicals ( • OH) and sulfate radicals (SO 4 •– ) have high redox potential but are susceptible to interference from the background environment (pH, inorganic ions, and dissolved organics). , In comparison, singlet oxygen ( 1 O 2 ) generated in the nonradical pathway has a long lifetime of approximately 4–6 μs and is favorable for adequate mass transfer between organic pollutants and PMS .…”

Modulating Electronic Structure Engineering of Atomically Dispersed Cobalt Catalyst in Fenton-like Reaction for Efficient Degradation of Organic Pollutants

“…Especially, refractory emerging pollutants (such as aromatic and antibiotic pollutants) frequently detected in natural water have brought great challenges to the control of water pollution and the recycling of water resources. − Problems with wastewater treatment are anticipated to become worse in the coming decades. Centralized wastewater treatment has been developed over the past century, in which advanced oxidation processes (AOPs) can be an attractive treatment option. − Among various AOPs, the peroxymonosulfate (PMS) based Fenton-like reaction has an excellent effect on removing recalcitrant pollutants in the aqueous phase. − However, the existing catalysts have the fundamental obstacles of poor stability, low selectivity, and high treatment cost, thus limiting the practical application of traditional AOPs. In addition, the surface chemistry of catalysts is complex and challenging to control, leading to the problematic identification of active sites and the ambiguity of the catalytic mechanisms.…”

Bimetallic Single-Atom Catalysts for Electrocatalytic and Photocatalytic Hydrogen Production

“…The kinetics of the hydrogen evolution reaction (HER) depends on the active sites as well as synergistic interactions with the catalyst support [6,7]. For example, graphene, known for its inert properties, and transition metal dichalcogenides (TMDs), which typically exhibit catalytic promotion, have emerged as versatile supports for modulating the catalytic activity of anchored metal sites toward enhanced HER [8][9][10][11].…”