过氧化氢
氧化剂
超氧化物
催化作用
化学
光化学
光催化
氧气
人工光合作用
产量(工程)
吸附
组合化学
质子化
氧化还原
化学工程
有机化学
材料科学
酶
离子
工程类
冶金
作者
Yong Deng,Wei Liu,Run Xu,Rong Gao,Niu Huang,Yong Zheng,Yingping Huang,Hao Li,Xin Ying Kong,Liqun Ye
标识
DOI:10.1002/anie.202319216
摘要
The synthesis of hydrogen peroxide through artificial photosynthesis is a green and promising technology with advantages in sustainability, economy and safety. However, superoxide radical (⋅O2-), an important intermediate in photocatalytic oxygen reduction to H2O2 production, has strong oxidizing properties that potentially destabilize the catalyst. Therefore, avoiding the accumulation of ⋅O2- for its rapid conversion to H2O2 is of paramount significance in improving catalyst stability and H2O2 yield. In this work, a strategy was developed to utilize protonated groups for the rapid depletion of converted ⋅O2-, thereby the efficiency of photocatalytic synthesis of H2O2 from CN was successfully enhanced by 47-fold. The experimental findings demonstrated that polydopamine not only improved carrier separation efficiency, and more importantly, provided the adsorption reduction active site for ⋅O2- for efficient H2O2 production. This work offers a versatile approach for synthesizing efficient and stable photocatalysts.
科研通智能强力驱动
Strongly Powered by AbleSci AI