High Efficiency Photocatalyst with Ultra‐Fine Pd NPs Constructed at Room Temperature for CO2 Reduction

Abstract

AbstractThe photocatalytic CO2 converted into the value‐added products is regarded as a green strategy for the conversion and utilization of energy. Herein, we develop a commodious SEA (strong electrostatic adsorption) strategy to synthesize Pd‐based photocatalysts with ultra‐fine Pd NPs (Pd/TiO2−S−B). As verified by experiments and characterizations, the ultra‐fine Pd NPs can inexorably heighten the reaction activity of catalyst, because it can provide several functions consist of improving the carrier separation efficiency, light absorption and CO2 molecules adsorption. Meanwhile, the interaction of Pd and substrate can prevent the agglomeration of Pd NPs in reaction process. The designed Pd/TiO2−S−B contributes excellent performance in a gas‐solid system. The yields of CO (105.1 μmol/g‐cat) and CH4 (254.3 μmol/g‐cat) detected, are about 5.25 and 6.24‐fold higher than those of pristine TiO2. Pd/TiO2−S−B also exhibits the forceful stability with acceptable decline of catalytic activity after three cycles. This opens the door for the preparation of high‐performance and steady photocatalysts by reliable and effortless strategies toward CO2 reduction.