Reactive oxygen species on transition metal-based catalysts for sustainable environmental applications

Abstract

Tailoring the reactive oxygen species (ROS) in advanced oxidation processes (AOP) in a controlled manner is essential in chemical synthesis and environmental applications. In this paper, we begin with an...

Toward Rational Design of Ordered Heterostructures for Energy and Environmental Sustainability: A Review

“…• À ) for the degradation of antibiotics in environment (Figure 3a). [108] Layered double hydroxides (LDHs) are distinguished 2D layered materials, being widely deployed in many applications for alleviating the energy and environment crisis. [109][110][111] As layers of LDHs carry two (or more) metal elements, direct calcination of LDHs can create dehydrated layered double oxides (LDOs) with well-preserved metal component and 2D feature of LDHs.…”

Constructing Defective Co3V2O8 Hexagonal Prism for Solvent-free Selective Oxidation of Cyclohexane: Strategy of Ionic Liquid Mediation

“…The structural design of catalysts and the efficient construction of active sites have been crucial in realizing the improvement of catalytic performance and efficient green catalytic oxidation processes. Oxygen defect engineering, as a powerful strategy, has been widely applied in various fields attributing to its functions in adjusting the electronic structure of catalysts and optimizing the distribution of active sites. − For typical catalytic oxidation reactions, OVs improve catalytic performance by activating molecular oxygen, promoting redox cycling, and regulating surface properties . Therefore, the construction of OVs coupled with the synergistic effect of MMOs provides a promising means to efficiently utilize the advantages of MMOs, which can generate more surface reactive oxygen species to facilitate catalytic performance.…”

Activating Lattice Oxygen in Amorphous MnO2 Nanostructure for Efficiently Selective Aerobic Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid

“…Nanostructured transition-metal oxides (TMOs) constitute the appealing, cost-efficient catalysts for the aerobic oxidation of HMF to FDCA . In this approach, the nanoscale TMOs can utilize O 2 as the stoichiometric oxidant to accomplish the oxidation reaction of HMF in a green manner, well described as the Mars–van Krevelen (MvK) process. , Specifically, the surface lattice oxygen (O L ) of the catalyst oxidizes the biosubstrate, which creates an oxygen vacancy (O V ) on the catalyst surface; thereafter, the replenishment of O 2 into O V allows the regeneration of O L for the durability of the oxidation reaction . In this principle, the robust catalysts should: (1) have a highly reactive O L and (2) allow the regeneration of O L efficiently. , Though the O L reactivity of nanostructured TMOs can be modified by tuning the local coordination environment of O L by tailoring their phase, morphology, or defect structure, it remains a grand challenge to create nanoscale TMOs that have very reactive O L as well as regenerable O L at the same time.…”

“…Amorphous TMO catalysts are an intriguing category of heterogeneous catalysts because of their distorted lattice structure and isotropic properties, yet they are not as extensively studied compared to their crystalline counterparts . Amorphous catalysts usually possess a higher standard redox potential than the crystalline counterparts and manifest great flexibility that brings more possibilities to regulate their catalytically active sites to fit the geometry required for a specified catalytic reaction. − As for the oxidation reaction, the inherent disordered structure of amorphous oxides can produce a distorted lattice and create loose metal–oxygen bonds, which are envisioned to improve the O L reactivity of nanostructured TMOs by reducing the O V formation energy (E OV ) .…”

“…18 In this approach, the nanoscale TMOs can utilize O 2 as the stoichiometric oxidant to accomplish the oxidation reaction of HMF in a green manner, well described as the Mars−van Krevelen (MvK) process. 19,20 catalyst surface; thereafter, the replenishment of O 2 into O V allows the regeneration of O L for the durability of the oxidation reaction. 21 In this principle, the robust catalysts should: (1) have a highly reactive O L and (2) allow the regeneration of O L efficiently.…”