High-Sensitivity Gas-Phase Raman Spectroscopy for Time-Resolved In Situ Analysis of Isotope Scrambling over Platinum Nanocatalysts.

ABSTRACT: In this study, we present a novel approach for time-resolved, in situ analysis of isotope scrambling reactions over platinum nanoparticle catalysts using high-sensitivity gas-phase Raman spectroscopy. A recently developed spectrometer setup enables detection limits in the hundreds of ppm, a dynamic range spanning four orders of magnitude in mole fraction, and a temporal resolution of one second. Experiments were performed by introducing D₂ gas to an H₂-activated Pt nanoparticle catalyst in a closed sample, resulting in the formation of gaseous HD and H₂. The time-resolved gas-phase mole fraction profiles show HD as the dominant product and only minor formation of H₂. This observation is consistent with a predominantly associative exchange mechani

SUBMITTER: Koschnick K 

PROVIDER: S-EPMC12392255 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature