Silicon-coordinated nitrogen-doped graphene as a promising metal-free catalyst for N₂O reduction by CO: a theoretical study.

ABSTRACT: Metal-free catalysts for the transformation of N₂O and CO into green products under mild conditions have long been expected. The present work proposes using silicon-coordinated nitrogen-doped graphene (SiN₄G) as a catalyst for N₂O reduction and CO oxidation based on periodic DFT calculations. The reaction proceeds via two steps, which are N₂O reduction at the Si reaction center, producing Si-O*, which subsequently oxidizes CO to CO₂. The N₂O reduction occurs with an activation energy barrier of 0.34 eV, while the CO oxidation step requires an energy of 0.66 eV. The overall reaction is highly exothermic, with a reaction energy of -3.41 eV, mostly due to the N₂ generation step. Compared to other metal-free ca

SUBMITTER: Junkaew A 

PROVIDER: S-EPMC9081867 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature