期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 7, 页码 3773-3780出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202014210
关键词
DFT calculations; electrocatalysis; glass-ceramic; oxygen evolution reaction; surface reconstruction
资金
- National Natural Science Foundation of China [51972006, 52072389]
- Science and Technology Commission of Shanghai Municipality [19ZR1479500]
- Program of Shanghai Academic Research Leader [20XD1424300]
The novel glass-ceramic material with a unique crystalline-amorphous nanostructure synergistically accelerates surface reconstruction, showcasing excellent oxygen evolution reaction activity and potential as an efficient non-precious metal catalyst.
The effective non-precious metal catalysts toward the oxygen evolution reaction (OER) are highly desirable for electrochemical water splitting. Herein, we prepare a novel glass-ceramic (Ni1.5Sn@triMPO(4)) by embedding crystalline Ni1.5Sn nanoparticles into amorphous trimetallic phosphate (triMPO(4)) matrix. This unique crystalline-amorphous nanostructure synergistically accelerates the surface reconstruction to active Ni(Fe)OOH, due to the low vacancy formation energy of Sn in glass-ceramic and high adsorption energy of PO43- at the V-O sites. Compared to the control samples, this dual-phase glass-ceramic exhibits a remarkably lowered overpotential and boosted OER kinetics after surface reconstruction, rivaling most of state-of-the-art electrocatalysts. The residual PO43- and intrinsic V-O sites induce redistribution of electron states, thus optimizing the adsorption of OH* and OOH* intermediates on metal oxyhydroxides and promoting the OER activity.
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