光催化
材料科学
三乙醇胺
异质结
水溶液
制氢
化学工程
十二面体
催化作用
无机化学
光电子学
分析化学(期刊)
物理化学
结晶学
有机化学
化学
工程类
作者
Liming Sun,Yuan Zhuang,Yusheng Yuan,Wenwen Zhan,Xiaojun Wang,Xiguang Han,Yanli Zhao
标识
DOI:10.1002/aenm.201902839
摘要
Abstract CuO as a catalyst has shown promising application prospects in photocatalytic splitting of water into hydrogen (H 2 ). However, the instability of CuO in amine aqueous solution limits the applications of CuO‐based photocatalysts in the photocatalytic H 2 evolution. In this work, a novel dodecahedral nitrogen (N)‐doped carbon (C) coated CuO‐In 2 O 3 p–n heterojunction (DNCPH) is designed and synthesized by directly pyrolyzing benzimidazole‐modified dodecahedral Cu/In‐based metal‐organic frameworks, showing long‐term stability in triethanolamine (TEOA) aqueous solution and excellent photocatalytic H 2 production efficiency. The improved stability of DNCPH in TEOA solution is ascribed to the alleviation of electron deficiency in CuO by forming the p–n heterojunction and the protection with coated N‐doped C layer. Based on detailed theoretical calculations and experimental studies, it is found that the improved separation efficiency of photogenerated electron/hole pairs and the mediated adsorption behavior (|∆ G H * |→0) by coupling N‐doped C layer with CuO‐In 2 O 3 p–n heterojunction lead to the excellent photocatalytic H 2 production efficiency of DNCPH. This work provides a feasible strategy for effectively applying CuO‐based photocatalysts in photocatalytic H 2 production.
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