Oxygen vacancy promoting artificial atom (RuPd) by d-orbital coupling for efficient water dissociation
Ruofan Shen, Yanyan Liu, Shilin Liu, Shuyan Guan, Huanhuan Zhang, Sehrish Mehdi, Saima Ashraf, Ting‐Hui Xiao, Erjun Liang, Jianchun Jiang, Yongfeng Wang, Baojun Li
Abstract
Rational design of highly active catalysts for breaking hydrogen-oxygen bonds is of great significance in energy chemical reactions involving water. Herein, an efficient strategy for the artificial atom (RuPd) established by d-orbital coupling and adjusted by oxygen vacancy (V O ) is verified for water dissociation. As an experimental verification, the turnover frequency of RuPd-TiO 2 -V O (RuPdTV O ) catalyst in ammonia borane hydrolysis reaches up to 2750 min −1 (26,190 min −1 based on metal dispersion) in the absence of alkali, exceeding the highest active catalysts (Rh-based catalysts). The d-orbital coupling effect between Ru and Pd simulates the outer electronic structure of Rh. Electron transfer from V O to (RuPd) constructs an electron-rich state of active sites that further enhances the ability of the artificial atom to dissociate water. This work provides an effective electronic regulation strategy from V O and artificial atom constructed by d-orbital coupling effect for efficient water dissociation.