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Exploring the Performance Improvement of the Oxygen Evolution Reaction in a Stable Bimetal–Organic Framework System
Author(s) -
Wang XiaoLi,
Dong LongZhang,
Qiao Man,
Tang YuJia,
Liu Jiang,
Li Yafei,
Li ShunLi,
Su JiaXin,
Lan YaQian
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201803587
Subject(s) - bimetallic strip , bimetal , oxygen evolution , catalysis , carboxylate , electrocatalyst , metal organic framework , materials science , metal , combinatorial chemistry , chemistry , nanotechnology , organic chemistry , electrochemistry , electrode , metallurgy , adsorption
Despite wide applications of bimetallic electrocatalysis in oxygen evolution reaction (OER) owing to their superior performance, the origin of the improved performance remains elusive. The underlying mechanism was explored by designing and synthesizing a series of stable metal–organic frameworks (MOFs: NNU‐21–24 ) based on trinuclear metal carboxylate clusters and tridentate carboxylate ligands. Among the examined stable MOFs, NNU‐23 exhibits the best OER performance; particularly, compared with monometallic MOFs, all the bimetallic MOFs display improved OER activity. DFT calculations and experimental results demonstrate that introduction of the second metal atom can improve the activity of the original atom. The proposed model of bimetallic electrocatalysts affecting their OER performance can facilitate design of efficient bimetallic catalysts for energy storage and conversion, and investigation of the related catalytic mechanisms.