Reductive CO2 fixation by the N-formylation reaction over supported Pt nanoparticle catalysts modified with basic polyoxometalates

Abstract

The N-Formylation reaction of amines using CO₂ as a carbon source is a promising way to utilize CO₂ to produce value-added chemicals. We herein developed supported Pt nanoparticle (NP) catalysts with a surface modified with a basic polyoxometalate, [Nb₆O₁₉]⁸⁻, by a simple adsorption method. The designed surface efficiently promoted reductive CO₂ fixation by the N-formylation reaction of secondary amines under CO₂ and H₂ conditions. The interface between the modified basic [Nb₆O₁₉]⁸⁻ and Pt NP surface facilitated the hydrogenation of carbamate intermediates by the bifunctionality of H₂ activation and basicity. This work demonstrated that Pt NP surface design by a bottom-up modification with basic polyoxometalates facilitated the N-formylation reaction using CO₂ as a carbon source without the addition of any external base.