Low-Coordinated Conductive ZnCu Metal-Organic Frameworks for Highly Selective H2O2 Electrosynthesis

Zhihao Pei, Yunxiang Li, Guilan Fan, 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

12 Citations (Scopus)
6 Downloads (CityUHK Scholars)

Abstract

Direct electrosynthesis of hydrogen peroxide (H2O2) with high production rate and high selectivity through the two-electron oxygen reduction reaction (2eORR) offers a sustainable alternative to the energy-intensive anthraquinone technology but remains a challenge. Herein, a low-coordinated, 2D conductive Zn/Cu metal-organic framework supported on hollow nanocube structures (ZnCu-MOF (H)) is rationally designed and synthesized. The as-prepared ZnCu-MOF (H) catalyst exhibits substantially boosted electrocatalytic kinetics, enhanced H2O2 selectivity, and ultra-high Faradaic efficiency for 2eORR process in both alkaline and neutral conditions. Electrochemical measurements, operando/quasi in situ spectroscopy, and theoretical calculation demonstrate that the introduction of Cu atoms with low-coordinated structures induces the transformation of active sites, resulting in the beneficial electron transfer and the optimized energy barrier, thereby improving the electrocatalytic activity and selectivity. © 2024 The Author(s). Small published by Wiley-VCH GmbH.
Original languageEnglish
Article number2403808
JournalSmall
Volume20
Issue number38
Online published21 May 2024
DOIs
Publication statusPublished - 19 Sept 2024

Research Keywords

  • conductive metal-organic frameworks
  • hollow structures
  • low-coordinated metal site
  • two-electron oxygen reduction reaction

Publisher's Copyright Statement

  • This full text is made available under CC-BY-NC 4.0. https://creativecommons.org/licenses/by-nc/4.0/

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