Tunable Selectivity in CO<sub>2</sub> Photo‐Thermal Reduction by Perovskite‐Supported Pd Nanoparticles
Diego Mateo, Partha Maity, Genrikh Shterk, Omar F. Mohammed, Jorge Gascón
Abstract
Abstract Photo‐thermal catalysis has recently emerged as a promising alternative to overcome the limitations of traditional photocatalysis. Despite its potential, most of the photo‐thermal systems still lack adequate selectivity patterns and appropriate analysis of the underlying reaction pathways, thus hampering a wide implementation. Herein, a novel photocatalyst based on Pd nanoparticles (NPs) supported on barium titanate (BTO) was prepared for the selective photo‐thermal reduction of CO 2 and displayed catalytic rates of up to 8.2 mol CO g Pd −1 h −1 . The photocatalyst allowed for a tailored selectivity towards CO or CH 4 as a function of the metal loading or the light intensity. Mechanistic studies indicated that both thermal and non‐thermal contributions of light played a role in the overall reaction pathway, each of them being dominant upon changing reaction conditions.