Enhanced two-electron oxygen reduction for hydrogen peroxide production via fine-tuning the concentration of oxygen vacancies in MoO3-x

作者：Jiang, Hao; Zhang, Chengxu^*; Wang, Zhiyuan; Zhang, Yue; Le, Thiquynhxuan; Mei, Yunjie; Feng, Yuebin; Hu, Jue^*

来源：Applied Catalysis A: General , 2023, 661: 119242.

DOI：10.1016/j.apcata.2023.119242

• 2e(-)oxygen reduction reaction
• Hydrogen peroxide
• Oxygen vacancy concentration
• a-MoO3

Producing hydrogen peroxide (H2O2) electrochemically is a possible alternative to industrial anthraquinone synthesis. Herein, a-MoO3-x catalysts with controllable oxygen vacancies for two-electron Oxygen Reduction (2e(-) ORR) electrocatalysis have been reported for the first time. Because of the finely tuned oxygen vacancy concentration of a-MoO3-x-400, it is particularly sensitive to the production of H2O2, providing very high selectivity in H2O2 production reaches as high as 93% with an average yield of 310 mmol gcat (- 1) h(-1) over 12 h. In addition to providing us with the most abundant and attractive transition metal oxide (TMO) catalysts yet, this research provides a fresh approach to the rational development of effective TMO catalysts.