Visible and NIR Light Assistance of the N2 Reduction to NH3 Catalyzed by Cs-promoted Ru Nanoparticles Supported on Strontium Titanate

Yong Peng; Josep Albero; Antonio Franconetti; Patricia Concepción; Hermenegildo García

doi:10.1021/acscatal.2c00509

Visible and NIR Light Assistance of the N₂ Reduction to NH₃ Catalyzed by Cs-promoted Ru Nanoparticles Supported on Strontium Titanate

ACS Catal. 2022 May 6;12(9):4938-4946. doi: 10.1021/acscatal.2c00509. Epub 2022 Apr 12.

Authors

Yong Peng¹, Josep Albero¹, Antonio Franconetti², Patricia Concepción¹, Hermenegildo García¹

Affiliations

¹ Instituto Universitario de Tecnología Química CSIC-UPV, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Universitat Politecnica de Valencia, Avda. de los Naranjos s/n, 46022 Valencia, Spain.
² Departamento Química Orgánica, Facultad de Química, Universidad de Sevilla, Profesor García Gonzalez 1, 41012 Sevilla, Spain.

Abstract

NH₃ production accounts for more than 1% of the total CO₂ emissions and is considered one of the most energy-intensive industrial processes currently (T > 400 °C and P > 80 bars). The development of atmospheric-pressure N₂ fixation to NH₃ under mild conditions is attracting much attention, especially using additional renewable energy sources. Herein, efficient photothermal NH₃ evolution 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 NH₃ rate near 3500 μmol_NH₃ g_catalyst ^-1 h^-1 was achieved for 120 h reactions, being among the highest values reported at atmospheric pressure under 1 Sun irradiation.