期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 31, 页码 9660-9664出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201803587
关键词
bimetallic electrocatalysts; clusters; iron; metal-organic frameworks; oxygen evolution reaction
资金
- NSFC [21622104, 21471080, 21701085]
- NSF of Jiangsu Province of China [BK20171032]
- Natural Science Research of Jiangsu Higher Education Institutions of China [17KJB150025]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Foundation of Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
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.
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