Abstract
The extremely large surface area offered by quasi-two-dimensional (2D) nanostructures is a great advantage for catalytic applications. While bimetallic materials have been discovered as a group of promising catalysts for electrochemical water splitting, a facile and reliable synthesis approach toward 2D morphology to fully release its electrochemical catalytic potential is still lacking. In this work, bimetallic Co-Mo-O ultrathin nanosheets were synthesized by ionic layer epitaxy with controlled composition ratio. The Co-Mo-O nanosheets exhibited a quadrangle shape with a uniform thickness of μ2.5 nm. This 2D morphology largely enriched the surface catalytic active site ratio. Particularly, nanosheets with 2:1 Co-to-Mo ratio showed a substantially enhanced OER catalytic activity with a 3 orders of magnitude higher mass activity compared to benchmark IrO2 and RuO2 in an alkaline environment. This study introduces a promising possibility for creating high-performance electrocatalysts from 2D bimetallic materials with a high efficiency for material utilization.
Original language | English |
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Pages (from-to) | 3367-3375 |
Number of pages | 9 |
Journal | ACS Energy Letters |
Volume | 6 |
Issue number | 9 |
DOIs | |
State | Published - 10 Sep 2021 |
Externally published | Yes |
ASJC Scopus subject areas
- Chemistry (miscellaneous)
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Energy Engineering and Power Technology
- Materials Chemistry