Construction of Co(OH)F/Ni(OH)2@Fe(OH)3 core-shell heterojunction on nickel foam for efficient oxygen evolution |
| |
| Affiliation: | 1. School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030051, People''s Republic of China;2. Shanxi Key Laboratory of High Performance Battery Materials and Devices, North University of China, Taiyuan, 030051, People''s Republic of China |
| |
| Abstract: | The sluggish anodic reaction (OER) kinetics hinder electrochemical water splitting at high energy densities, which can be solved by developing suitable catalysts. Herein, we report a novel Co(OH)F/Ni(OH)2@Fe(OH)3-Dx (Dx represents the hydrolysis time, X = 0.5, 1, 2 days) heterojunction grown on nickel foam, which was synthesized by the hydrolysis of Fe3+ on the Co(OH)F/Ni(OH)2 surface at room temperature. Electrocatalytic oxygen evolution tests showed that the prepared Co(OH)F/Ni(OH)2@Fe(OH)3-Dx composites had better catalytic activity than pure Co(OH)F/Ni(OH)2 in 1.0 M KOH, especially Co(OH)F/Ni(OH)2@Fe(OH)3-D1. It only requires an ultra-low overpotential (η10) of 270 mV, SEM and TEM showed that Co(OH)F/Ni(OH)2@Fe(OH)3-D1 is a perfect all-encapsulated core-shell structure, which facilitates the exposure of active sites and electron transfer, and thus obviously improves oxygen evolution. |
| |
| Keywords: | Oxygen evolution Catalyst Core-shell structure |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
