| Autor: |
Zhang N; MOE Key Laboratory of Cluster Science, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China. yin@bit.edu.cn cwhu@bit.edu.cn., Wang Y, Hao YC, Ni YM, Su X, Yin AX, Hu CW |
| Jazyk: |
angličtina |
| Zdroj: |
Nanoscale [Nanoscale] 2018 Nov 08; Vol. 10 (43), pp. 20313-20320. |
| DOI: |
10.1039/c8nr05337e |
| Abstrakt: |
Engineering compositions, structures, and defects can endow nanomaterials with optimized catalytic properties. Here, we report that cobalt oxide (CoOx) ultrathin nanosheets (UTNS, ∼1.6 nm thick) with a large number of oxygen defects and mixed cobalt valences can be obtained through a facile one-step hydrothermal protocol. The large number of oxygen defects make the ultrathin CoOx nanosheet a superior OER catalyst with low overpotentials of 315 and 365 mV at current densities of 50 and 200 mA cm-2, respectively. The stable framework-like architectures of the UTNS further ensure their high OER activity and durability. Our method represents a facile one-step preparation of CoOx nanostructures with tunable compositions, morphologies, and defects, and thus promotes OER properties. This strategy may find its wider applicability in designing active, robust, and easy-to-obtain catalysts for OER and other electrocatalytic systems. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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