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Precise Design of Covalent Organic Frameworks for Electrocatalytic Hydrogen Peroxide Production
Author(s) -
Guo Yu,
Xu Qing,
Yang Shuai,
Jiang Zheng,
Yu Chengbing,
Zeng Gaofeng
Publication year - 2021
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202100030
Subject(s) - electrocatalyst , covalent organic framework , hydrogen peroxide , electrochemistry , faraday efficiency , aqueous solution , covalent bond , adsorption , chemistry , selectivity , chemical engineering , ion , inorganic chemistry , combinatorial chemistry , catalysis , electrode , organic chemistry , engineering
Electrochemical synthesis of H 2 O 2 with high productivity is a significant challenge in electrocatalysis. Herein, we develop Mg‐ion contained covalent organic frameworks (MgP‐DHTA‐COF), comprising stacked 2D layers, well‐defined skeletons, and well‐ordered monodispersed active sites, for the electrocatalytic production of H 2 O 2 directly from O 2 and H 2 O. The precise‐designed MgP‐DHTA‐COF achieves H 2 O 2 selectivity up to 96%, high Faradaic efficiency of 91% and reliable stability for H 2 O 2 synthesis in 0.10 mol L −1 KOH aqueous solution. Both experiments and simulations demonstrate that the pyrrolic‐N fixed Mg ions in the knots promote the reactivity of COF and enhance the adsorption ability of OOH*. This work provides a valuable example for the design of an efficient electrocatalyst based on COFs for H 2 O 2 production.