Tuning the turnover frequency and selectivity of photocatalytic CO2 reduction to CO and methane using platinum and palladium nanoparticles on Ti-Beta zeolites

A Ti-Beta zeolite was used in gas phase photocatalytic CO2 reduction to reduce the charge recombination rate and increase surface area compared P25 as commercial benchmark, reaching 607 m2 g?1. By adding Pt nanoparticles, selectivity can be tuned toward CO, a value of 92% turnover frequency (TOF) 96 µmol·gcat?1·h?1, nearly an order magnitude higher comparison with P25. Pd nanoparticles shifted from CO (70% for bare zeolite), CH4 prevalent species (60%). In this way, or by either using Pd. The TOF values obtained work outperform reported state-of-the-art similar research. improved activity attributed separation efficiency, together plasmonic contribution metal under applied experimental conditions.