异质结
纳米孔
材料科学
光催化
载流子
纳米技术
制氢
化学吸附
化学工程
氢
催化作用
光电子学
化学
有机化学
工程类
作者
Ling Yuan,Cheng Tang,Peiyang Du,Jiaxin Li,Chaoqi Zhang,Yamin Xi,Yin Bi,Tong Bao,Aijun Du,Chao Liu,Chengzhong Yu
出处
期刊:Angewandte Chemie
[Wiley]
日期:2024-08-26
卷期号:63 (51): e202412340-e202412340
被引量:33
标识
DOI:10.1002/anie.202412340
摘要
Abstract Photocatalytic N 2 reduction reaction (PNRR) offers a promising strategy for sustainable production of ammonia (NH 3 ). However, the reported photocatalysts suffer from low efficiency with great room to improve regarding the charge carrier utilization and active site engineering. Herein, a porous and chemically bonded heterojunction photocatalyst is developed for efficient PNRR to NH 3 production via hybridization of two semiconducting metal—organic frameworks (MOFs), MIL‐125−NH 2 (MIL=Material Institute Lavoisier) and Co‐HHTP (HHTP=2,3,6,7,10,11‐hexahydroxytripehenylene). Experimental and theoretical results demonstrate the formation of Ti−O−Co chemical bonds at the interface, which not only serve as atomic pathway for S‐scheme charge transfer, but also provide electron‐deficient Co centers for improving N 2 chemisorption/activation capability and restricting competitive hydrogen evolution. Moreover, the nanoporous structure allows the transportation of reactants to the interfacial active sites at heterojunction, enabling the efficient utilization of charge carriers. Consequently, the rationally designed MOF‐based heterojunction exhibits remarkable PNRR performance with an NH 3 production rate of 2.1 mmol g −1 h −1 , an apparent quantum yield (AQY) value of 16.2 % at 365 nm and a solar‐to‐chemical conversion (SCC) efficiency of 0.28 %, superior to most reported PNRR photocatalysts. Our work provides new insights into the design principles of high‐performance photocatalysts.
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