Ru single atom catalyst with dual reaction sites for efficient fenton-like degradation of organic contaminants

Facilely Tuning the First-Shell Coordination Microenvironment in Iron Single-Atom for Fenton-like Chemistry toward Highly Efficient Wastewater Purification

“…Single-atom catalysts (SACs) achieve maximum contact between metal atoms and support in heterogeneous catalysis and further generate highly active sites so they are considered an ideal model for studying the strong interaction between metal and support. – The first-shell coordination atoms around metal center atoms profoundly impact electron structure, surface nature, and even reaction routes due to the direct covalent bonding . Thus, optimizing the local atomic environment of SACs is imperative to achieve excellent catalytic performance. – Transition metal-based SACs demonstrate immense advantages in PMS-AOPs with high catalytic activity and stability, tunable coordination environments, and superior selectivity as compared to nanoparticle-based catalysts. – Significant progress has been made in the field of single-atom catalysis in the past decade, but a profound understanding of the structure–property correlation of SACs at the atomic scale remains a challenging task. Nitrogen-doped carbon-supported (NC) SACs have been extensively used to convert PMS into 1 O 2 to efficiently degrade organic pollutants. – The pyrolysis strategy remains the most commonly used method for preparing carbon-supported SACs.…”

Molten Salt-Derived RuO2 Nanocrystals and Nanowires: Unveiling Correlations of Morphology, Microstructure, and Electrocatalytic Performance

“…Specifically, a peak at (11.0 Å –1 , 2.4 Å) in the Ru foil denotes the contribution of Ru–Ru coordination. In contrast, the RuO 2 reference and RuO 2 NCs and NWs all present two distinct peaks: one at (11.0 Å –1 , 3.1 Å) associated with Ru–Ru coordination and another at (6.9 Å –1 , 1.5 Å), signifying Ru–O coordination. , This consistency in peak position across different samples underscores the similar contributions of Ru–Ru and Ru–O coordinations.…”

Local structural environment of single-atom catalysts

“…The engineering of the first or higher coordination shells by precisely tailoring the heterogeneity of coordination atoms offers a great opportunity to tune the properties of SACs. [194][195][196][197][198][199][200][201][202] Compared to engineering the first coordination shell, engineering the second and/or higher coordination shells would alter the distribution of the electron density over the central single metal sites indirectly and more moderately through long-range electron delocalization, thus tuning the catalytic performance of SACs. 181 The effects of engineering the coordination shell is not just to redistribute uneven charge and thus optimize the adsorption energies of intermediate species, but also to modify the conductivity of the supported framework and thus improve charge conduction.…”