Surface immobilization of nitrogen-coordinated iron atoms: a facile and efficient strategy toward MNC sites with superior catalytic activities

Abstract

Atomically dispersed metal catalysts have high metal atom utilization and catalytic activity. However, the rational design and scalable synthesis of such catalysts, especially with high metal content, remains a big...

Atomically Dispersed NiNx Site with High Oxygen Electrocatalysis Performance Facilely Produced via a Surface Immobilization Strategy

“…Porphyrin FeN 4 sites can be implanted into graphene to produce active catalysts by ball milling at room temperature . We also illustrated that the postcoordinated surface MN x sites, , as well as surface immobilized MN x sites, have good electrocatalysis activity. , It is reasonable to suppose that the active MN x site can be produced not only by trapping metal atoms with vacancy defects at very high temperatures but also by anchoring the MN x sites on the substrate surface via organic reactions under very mild conditions. By covalently immobilizing the preorganized MN x complex on the substrate surface, atomically dispersed active MN x sites possibly can be prepared in a predictive and scalable way.…”

Surface-Immobilized ZnNx Sites as High-Performance Catalysts for Continuous Flow Knoevenagel Condensation in Water

“…Catalytically active FeN 4 sites can be implanted into graphene through ball-milling at room temperature . Our prior research works have demonstrated that the active metal sites can be immobilized on the substrate surface to form atomically dispersed MNC-type active sites, with a strategy resembling the surface organometallic chemistry under very mild conditions. − In this approach, preorganized MN x complexes are covalently immobilized on the substrate surface, while the amine groups of the ligand condensed with the CO group generated in situ on the surface to form the active MN x sites. As a result, atomically dispersed active MN x sites can be produced in a predictable and scalable way, which is similar to the single site catalyst to some extent. − Our previous results illustrated that the surface-immobilized atomically dispersed NiN x sites exhibited a high catalytic activity in the Henry reaction for the production of β-nitro alcohols .…”