Visible and NIR Light Assistance of the N2Reduction to NH3Catalyzed by Cs-promoted Ru Nanoparticles Supported on Strontium Titanate

Abstract

NH3production accounts for more than 1% of the total CO2emissions and is considered one of the most energy-intensive industrial processes currently (T > 400 °C and P > 80 bars). The development of atmospheric-pressure N2fixation to NH3under mild conditions is attracting much attention, especially using additional renewable energy sources. Herein, efficient photothermal NH3evolution in continuous flow upon visible and NIR light irradiation at near 1 Sun power using Cs-decorated strontium titanate-supported Ru nanoparticles is reported. Notably, for the optimal photocatalytic composition, a constant NH3rate near 3500 μmolNH3gcatalyst-1h-1was achieved for 120 h reactions, being among the highest values reported at atmospheric pressure under 1 Sun irradiation.