An Unlocked Two-Dimensional Conductive Zn-MOF on Polymeric Carbon Nitride for Photocatalytic H2O2 Production

Yunxiang Li, Yan Guo, Deyan Luan, Xiaojun Gu*, Xiong Wen David Lou*

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

72 Citations (Scopus)

Abstract

Developing highly efficient catalytic sites for O2 reduction to H2O2, while ensuring the fast injection of energetic electrons into these sites, is crucial for artificial H2O2 photosynthesis but remains challenging. Herein, we report a strongly coupled hybrid photocatalyst comprising polymeric carbon nitride (CN) and a two-dimensional conductive Zn-containing metal–organic framework (Zn-MOF) (denoted as CN/Zn-MOF(lc)/400; lc, low crystallinity; 400, annealing temperature in °C), in which the catalytic capability of Zn-MOF(lc) for H2O2 production is unlocked by the annealing-induced effects. As revealed by experimental and theoretical calculation results, the Zn sites coordinated to four O (Zn-O4) in Zn-MOF(lc) are thermally activated to a relatively electron-rich state due to the annealing-induced local structure shrinkage, which favors the formation of a key *OOH intermediate of 2e O2 reduction on these sites. Moreover, the annealing treatment facilitates the photoelectron migration from the CN photocatalyst to the Zn-MOF(lc) catalytic unit. As a result, the optimized catalyst exhibits dramatically enhanced H2O2 production activity and excellent stability under visible light irradiation. © 2023 Wiley-VCH GmbH.
Original languageEnglish
Article numbere202310847
JournalAngewandte Chemie - International Edition
Volume62
Issue number44
Online published12 Sept 2023
DOIs
Publication statusPublished - 26 Oct 2023

Research Keywords

  • Conductive Metal–Organic Framework
  • H2O2 Production
  • O2 Reduction
  • Photocatalysis
  • Single-Atom Catalysis

Fingerprint

Dive into the research topics of 'An Unlocked Two-Dimensional Conductive Zn-MOF on Polymeric Carbon Nitride for Photocatalytic H2O2 Production'. Together they form a unique fingerprint.

Cite this