Anchoring nitrogen-doped Co2P nanoflakes on NiCo2O4 nanorod arrays over nickel foam as high-performance 3D electrode for alkaline hydrogen evolution
| Autor: | He Yilei, Zumin Wang, Lijuan Zhang, Xiaohao Ji, Xing Zhang, Cheng Meng, Ranbo Yu, Xiaoyu Chen |
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| Rok vydání: | 2023 |
| Předmět: |
Tafel equation
Materials science Renewable Energy Sustainability and the Environment chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure Electrocatalyst Electrochemistry 01 natural sciences 0104 chemical sciences Catalysis Nickel Chemical engineering chemistry Electrode Nanorod 0210 nano-technology |
| Zdroj: | Green Energy & Environment. 8:470-477 |
| ISSN: | 2468-0257 |
| Popis: | Effective and robust electrocatalysts are mainly based on innovative materials and unique structures. Herein, we designed a flakelike cobalt phosphide-based catalyst supporting on NiCo2O4 nanorods array, which in-situ grew on the nickel foam (NF) current collector, referring as N–Co2P/NiCo2O4/NF electrode. By optimizing the microstructure and electronic structure through 3D hierarchy fabrication and nitrogen doping, the catalyst features with abundant electrochemical surface area, favorable surface wettability, excellent electron transport, as well as tailored d band center. Consequently, the as-prepared N–Co2P/NiCo2O4/NF electrode exhibits an impressive HER activity with a low overpotentials of 58 mV at 10 mA cm−2, a Tafel slop of 75 mV dec−1, as well as superior durability in alkaline medium. This work may provide a new pathway to effectively improve the hydrogen evolution performance of transition metal phosphides and to develop promising electrodes for practical electrocatalysis. |
| Databáze: | OpenAIRE |
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