Oxygen-vacancy-rich Ru-clusters decorated Co/Ce oxides modifying ZIF-67 nanocubes as a high-efficient catalyst for NaBH4 hydrolysis

Designing a cost-effective and high-performance catalyst for NaBH 4 hydrolysis is a significant step in developing a sustainable hydrogen source . Herein, we prepared a cost-effective Ru-clusters decorated cobalt-cerium oxides coating ZIF-67 (Ru/Co 6 Ce 1 @ZIF-67) catalyst via a facile reduction method, displaying high performance and exceptional reusability in alkaline NaBH 4 solution. The optimized catalyst exhibits a high hydrogen generation rate (HGR, 5726.1 mL min −1  g −1 ), turnover frequency (TOF, 413.9 mol H2 min −1 mol R u − 1 ), and low activation energy (E a , 53.0 kJ mol −1 ), surpassing most of the recently reported catalysts. Furthermore, the catalytic performance does not change considerably after five cycles, indicating the catalyst's multi-cycle reusability. Studies imply the uniquely synergistic effect of Ru, Co/Ce oxides, abundant oxygen vacancies , as well as the porous nanocube structure, enabling the catalysts to possess high metal dispersion, outstanding catalytic performance and exceptional reusability. This work will open light on using an oxygen vacancies-rich strategy to design a high-activity catalyst for promoting NaBH 4 hydrolysis.