Spontaneously engineering heterogeneous interface of silver nanoparticles on α-Co(OH)2 for boosting electrochemical oxygen evolution
| Autor: | Feng Liu, Zhenquan Tan, Nan Zhang, Zi-Hao Wang, Xiaofeng Wang, Zan-Yao Niu, Xue-Zhi Song, Guo-Zheng Zhang, Wen-Yu Zhu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Mechanical Engineering Intercalation (chemistry) Metals and Alloys Oxygen evolution Layered double hydroxides 02 engineering and technology Overpotential engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Electrocatalyst 01 natural sciences Silver nanoparticle 0104 chemical sciences Chemical engineering Mechanics of Materials Materials Chemistry engineering Water splitting 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 873:159766 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2021.159766 |
| Popis: | Highly-efficient electrocatalysts for oxygen evolution reaction, especially for metal nanoparticles supported on layered double hydroxides (LDHs) are very desirable and highly challenge able in modern water splitting and metal air batteries. Herein, this work applies a novel and simple spontaneous redox reaction to fabricate a heterogeneous structure by depositing silver nanoparticles on MoO2-4 intercalating α-Co(OH)2 support in a quite quick manner (5 min). The as-constructed heterostructural interface endows the hybrid α-Co(OH)2/Ag with electronic interaction between Ag and α-Co(OH)2, modulated electronic structure, and synergistic effect. Furthermore, the spontaneously engineering interface also promotes the water adsorption and the valence state regulation and enhances the intrinsic activity of the catalytically active site. Benefitting from the above collective merits, the optimal heterostructural electrocatalyst (α-Co(OH)2/Ag-0.01) can drive a current density of 10 mA cm−2 at the overpotential of only 270 mV, outperforming the bare α-Co(OH)2 and even commercial benchmark RuO2. This work opens up a new avenue towards advanced OER electrocatalysts by cheap metal nanoparticles engaged interface engineering, also showing significant potential for other energy-related electrocatalysis. |
| Databáze: | OpenAIRE |
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