期刊
SMALL METHODS
卷 3, 期 1, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smtd.201800344
关键词
durability; enhancement; nanosheets; NiMn-LDHs; water oxidation
资金
- National Key R&D Program of China [2018YFD0800700]
- National Natural Science Foundation of China [21776324]
- Science and Technology Planning Project of Guangdong Province [2014A050503032]
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology [2018K02]
- Sun Yat-sen University [201602]
Layered double hydroxides (LDHs) are noble metal-free 2D materials promising for water oxidation. One-step synthesis of ultrathin NiMn-LDHs nanosheets is successfully achieved at room temperature avoiding the multiple tedious steps (e.g., hydrothermal treatment, exfoliation). The as-prepared NiMn-LDHs (1.3 nm thickness) exhibit the twofold enhancement of the activity and a reduction of overpotential by 80 mV at 10 mA cm(-2) in comparison with the traditional NiMn-LDHs in 0.1 m NaOH, which is superior to the previously reported LDH-derived electrocatalysts. The combination of theoretical and experimental results manifest that the largely enhanced electrocatalytic water oxidation activity of NiMn-LDHs nanosheets is associated with the highly exposed active sites with a nearly optimal intermediates (*OH and *O) adsorption energy.
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