Photocatalytic hydrogen evolution over Pt-Pd dual atom sites anchored on TiO nanosheets

• Published in: Catalysis science & technology Vol. 12; no. 23; pp. 7151 - 716
• Main Authors: Zhou, Yaxin, Qin, Hao, Fang, Sihan, Wang, Yangyang, Li, Jun, Mele, Giuseppe, Wang, Chen
• Format: Journal Article
• Published: 29.11.2022
• ISSN: 2044-4753; 2044-4761
• DOI: 10.1039/d2cy01314b

Photocatalytic hydrogen production from water is a clean and sustainable way of energy regeneration. Single-atom catalysts (SACs) have received increasing attention in the field of photocatalysis due to their high catalytic activity, selectivity, stability, and 100% atomic utilization. In this work, we utilized TiO 2 with oxygen vacancy (Vo-TiO 2 ) to anchor atomically dispersed Pt and Pd, developing a Vo-TiO 2 -supported dual atomic catalyst (Pt-Pd SAs/Vo-TiO 2 ). Experiments show the metal atomic sites are stabilized by the oxygen vacancy of TiO 2 , and the Ti-Pt-Ti structure and the Ti-Pd-Ti structure are constructed. The result shows that the hydrogen production rate of Pt-Pd SAs/Vo-TiO 2 is 4 times higher than that of Pt-Pd NPs/TiO 2 , and its hydrogen production rate is as high as 4241.4 μmol h −1 g cat. −1 , which greatly reduces catalyst cost and makes photocatalytic water hydrogen production more economical and sustainable. This work provides a new idea for the development of dual single-atom catalysts for efficient photocatalytic hydrogen production. The defective TiO 2 nanosheets (Vo-TiO 2 ) supported dual atomic catalyst (Pt-Pd SAs/Vo-TiO 2 ) to product hydrogen.