Photocatalytic hydrogen evolution over Pt–Pd dual atom sites anchored on TiO 2 nanosheets

• Published in: Catalysis science & technology Vol. 12; no. 23; pp. 7151 - 7160
• Main Authors: Zhou, Yaxin, Qin, Hao, Fang, Sihan, Wang, Yangyang, Li, Jun, Mele, Giuseppe, Wang, Chen
• Format: Journal Article
• Language: English
• 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.