光催化
钌
选择性
氮化碳
石墨氮化碳
金属
材料科学
碳纤维
催化作用
电子缺陷
光化学
化学
结晶学
有机化学
复合数
复合材料
作者
Lulu Bai,Hao Sun,Qiang Wu,Weifeng Yao
出处
期刊:Chemcatchem
[Wiley]
日期:2022-06-01
卷期号:14 (15)
被引量:11
标识
DOI:10.1002/cctc.202101954
摘要
Abstract Photocatalytic H 2 O 2 evolution via two‐electron oxygen reduction is a promising path for renewable and on‐the‐spot H 2 O 2 production compared with the traditional anthraquinone method. However, the efficiency of photocatalytic production of H 2 O 2 is usually very low. Herein, P‐doped carbon nitride loaded with ruthenium single atoms and clusters (Ru atom /P‐CN) is reported as an efficient photocatalyst for H 2 O 2 production. The yield of H 2 O 2 over Ru atom /P‐CN (385.8 mmol g −1 h −1 ) is about 4.3 times higher than that of P‐CN (88.9 mmol g −1 h −1 ) and 3.6 times higher than that of ruthenium nanoparticles loaded P‐CN (105.9 mmol g −1 h −1 ). Further mechanistic study indicates that the presence of Ru in the form of single atoms and clusters not only improves the separation efficiency of photogenerated carriers and inhibits the recombination of photogenerated electron‐hole pairs, but also increases the reactive sites of this catalytic system. This study breaks through people‘s understanding that precious metal loading is not conducive to H 2 O 2 selectivity and provides a new way to prepare low‐metal loading, high‐activity photocatalysts for H 2 O 2 production.
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