我组刘言在Applied Catalysis B: Environmental上发表论文

题目：

A 4e^- –2e^- cascaded pathway for highly efficient production of H₂ and H₂O₂ from water photo-splitting at normal pressure

作者：

Yan Liu¹ , Yajie Zhao¹ , Yue Sun, Jingjing Cao, Hui Wang, Xiao Wang, Hui Huang*, Mingwang Shao*, Yang Liu*, Zhenhui Kang*

单位：

 †Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials

(FUNSOM), Soochow University, 199 Ren’ai Road, Suzhou 215123, Jiangsu, People’s Republic of China

摘要：

Overall water solar-splitting is one of the most attractive candidates to break water down into hydrogen peroxide (H₂O₂) and hydrogen (H₂) in a cheapest and cleanest way (i.e., 2H₂O →H₂O₂+ H₂). However, the generated intermediate H₂O₂ in the 2e⁻ process would poison the catalysts. Hence, it is an ideal pathway to generate H₂O₂ by 4e⁻–2e⁻ cascaded process (H₂O→O₂→H₂O₂), which is more thermodynamically advantageous and can also avoid the catalyst poisoning by the intermediate product of H₂O₂. Herein, we report CoP modified by carbon dots (CoP/CDs composite) to realize simultaneous generation of H₂ and H₂O₂ via a 4e⁻–2e⁻ cascaded pathway, coupling photocatalytic water oxidation (4e⁻) and oxygen reduction reaction (2e⁻). The optimal CoP/CDs sample displays a prominent H₂ yield of 239 μmol/h/g and H₂O₂ production rate of 466 μmol/h/g without sacrificial agent at normal pressure. It exhibits the highest photocatalytic activity for water decomposition to produce H₂ and H₂O₂ simultaneously. Moreover, the quantum efficiency of the as-prepared sample is 2.05 % at 535 nm. This work offers a novel approach to achieve high-efficiency production of H₂ and H₂O₂ by photo catalytic water splitting.

影响因子：

16.683

分区情况：

1区

链接：  

https://doi.org/10.1016/j.apcatb.2020.118875