Year: 2024
Type: article
Abstract: Compared to H2-assisted activation mode, the direct dissociation of CO2 into carbonyl (*CO) with a simplified reaction route is advantageous for CO2-related synthetic processes and catalyst upgrading, while the stable C = O double bond makes it very challenging. Herein, we construct a subnano MoO3 layer on the surface of Mo2N, which provides a dynamically changing surface of MoO3↔MoOx (x < 3) for catalyzing CO2 hydrogenation. Rich oxygen vacancies on the subnano MoOx surface with a high electron donating capacity served as a scissor to directly shear the C = O double bond of CO2 to form CO at a high rate. The O atoms leached in CO2 dissociation are removed timely by H2 to regenerate active oxygen vacancies. Owing to the greatly enhanced dissociative activation of CO2, this MoOx/Mo2N catalyst without any supported active metals shows excellent performance for catalyzing CO2 hydrogenation to CO. The construction of highly disordered defective surface on heterostructures paves a new pathway for molecule activation. The direct dissociation of CO2 into carbonyl (*CO) via a simplified reaction pathway benefits CO2-related synthesis and catalyst improvement, though the stability of the C = O double bond poses a significant challenge. Here, the authors design a subnano MoO3 layer on the surface of Mo2N, offering a dynamically adaptive surface for catalyzing CO2 hydrogenation.
Source: Nature Communications
Institutions: Shandong University, Nankai University
Language: English
Subfield: Catalysis
Field: Chemical Engineering
Domain: Physical Sciences
SDG: Climate action
Open Access status: gold
Estimated APC paid: $6,790
Award: G1364721950
OpenAlex ID: W4403686833