期刊
ACS ENERGY LETTERS
卷 4, 期 11, 页码 2585-2592出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.9b01922
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资金
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- National Key Research and Development Program of China [2016YFA0202603, 2018YFA0208603]
- National Natural Science Foundation of China [51521001, 21890751, 51772282]
- Fundamental Research Funds for the Central Universities [2019-zy-047]
- Anhui Initiative in Quantum Information Technology
- CAS Interdisciplinary Innovation Team
- Fundamental Research Funds for the Central Universities
Oxygen evolution reaction (OER)-induced reconstruction on precatalysts generally results in surface-reconstructed catalysts with less active species and thus low mass activity. Herein, the deeply reconstructed (DR) catalyst is proposed and derived from a sub-10 nm precatalyst to achieve high-mass-activity catalysis. As a proof-of-concept, the DR-NiOOH with a multilevel nanosheet structure interconnected by sub-5 nm nanoparticles was obtained via a lithiation-induced deep reconstruction strategy. The robust DR-NiOOH with abundant active species enables its significantly enhanced mass activity (170 mV decrease in OER over-potential to achieve 5 mA mg(-1)) and better durability (>10 days) than that of incompletely reconstructed Ni@NiOOH. Its strong corrosion resistance (30 wt % KOH, 72 h) and high thermal stability (52.8 degrees C, >40 h) were also confirmed. Theoretical analyses support that the unsaturated OH coverages on orthorhombic NiOOH endow its good OER-active property. This work highlights the merits of high-utilization DR catalysts toward potential catalytic applications under realistic conditions.
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