Influence of Defects and H₂O on the Hydrogenation of CO₂ to Methanol over Pt Nanoparticles in UiO-67 Metal-Organic Framework.

ABSTRACT: In catalysts for CO₂ hydrogenation, the interface between metal nanoparticles (NPs) and the support material is of high importance for the activity and reaction selectivity. In Pt NP-containing UiO Zr-metal-organic frameworks (MOFs), key intermediates in methanol formation are adsorbed at open Zr-sites at the Pt-MOF interface. In this study, we investigate the dynamic role of the Zr-node and the influence of H₂O on the CO₂ hydrogenation reaction at 170 °C, through steady state and transient isotope exchange experiments, H₂O cofeed measurements, and density functional theory (DFT) calculations. The study revealed that an increased number of Zr-node defects increase the formation rates to both methanol and methane. Transient experiments linked the

SUBMITTER: Gutterod ES 

PROVIDER: S-EPMC7586342 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature