Back to Search Start Over

High‐efficiency Electroreduction of O2 into H2O2 over ZnCo Bimetallic Triazole Frameworks Promoted by Ligand Activation.

Authors :
Li, Zi‐Meng
Zhang, Chao‐Qi
Liu, Chao
Zhang, Hong‐Wei
Song, Hao
Zhang, Zhi‐Qiang
Wei, Guang‐Feng
Bao, Xiao‐Jun
Yu, Cheng‐Zhong
Yuan, Pei
Source :
Angewandte Chemie; 1/8/2024, Vol. 136 Issue 2, p1-9, 9p
Publication Year :
2024

Abstract

Co‐based metal–organic frameworks (MOFs) as electrocatalysts for two‐electron oxygen reduction reaction (2e− ORR) are highly promising for H2O2 production, but suffer from the intrinsic activity‐selectivity trade‐off. Herein, we report a ZnCo bimetal‐triazole framework (ZnCo‐MTF) as high‐efficiency 2e− ORR electrocatalysts. The experimental and theoretical results demonstrate that the coordination between 1,2,3‐triazole and Co increases the antibonding‐orbital occupancy on the Co−N bond, promoting the activation of Co center. Besides, the adjacent Zn−Co sites on 1,2,3‐triazole enable an asymmetric "side‐on" adsorption mode of O2, favoring the reduction of O2 molecules and desorption of OOH* intermediate. By virtue of the unique ligand effect, the ZnCo‐MTF exhibits a 2e− ORR selectivity of ≈100 %, onset potential of 0.614 V and H2O2 production rate of 5.55 mol gcat−1 h−1, superior to the state‐of‐the‐art zeolite imidazole frameworks. Our work paves the way for the design of 2e− ORR electrocatalysts with desirable coordination and electronic structure. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00448249
Volume :
136
Issue :
2
Database :
Complementary Index
Journal :
Angewandte Chemie
Publication Type :
Academic Journal
Accession number :
174635081
Full Text :
https://doi.org/10.1002/ange.202314266