Engineering heterostructured Ni@Ni(OH)2 core-shell nanomaterials for synergistically enhanced water electrolysis
| Autor: | Teresa J. Bandosz, Zhong-Yong Yuan, Xian-Wei Lv, Tie-Zhen Ren, Zheng Wang, Jun-Wei Zhang |
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| Rok vydání: | 2022 |
| Předmět: |
Materials science
Electrolysis of water Renewable Energy Sustainability and the Environment 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Redox 0104 chemical sciences Nanomaterials Catalysis chemistry.chemical_compound Electron transfer chemistry Chemical engineering Water splitting Synergistic catalysis 0210 nano-technology Bifunctional |
| Zdroj: | Green Energy & Environment. 7:1024-1032 |
| ISSN: | 2468-0257 |
| DOI: | 10.1016/j.gee.2020.12.009 |
| Popis: | Heterostructure engineering of electrocatalysts provides a fascinating platform to reasonably manipulate the physicochemical properties of nanomaterials and further improve their catalytic efficiency for water electrolysis. However, it still remains a huge challenge to construct well-designed core-shell heterostructured catalysts and identify the key role of components for synergistic catalysis. Herein, a melted polymeric salt tactics was innovatively developed to synthesize heterostructured Ni@Ni(OH)2 core-shell nanomaterials supported on porous carbon (named Ni@Ni(OH)2/PC), wherein well-defined Ni(OH)2-Ni heterostructure plays a pivotal role in improving electrocatalytic activity for water reduction and oxidation. Besides, the stable porous carbon support functions as a highway for continuous electron transfer between Ni and Ni(OH)2, and simultaneously enables the full exposure of accessible active sites. The fabricated Ni@Ni(OH)2/PC exhibits outstanding bifunctional electrocatalytic performance for overall water splitting (ƞ10 = 1.55 V) with a good long-time stability. This work sheds new light on the design of engineering heterostructure of active bifunctional electrocatalysts for efficient energy conversion system. |
| Databáze: | OpenAIRE |
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