Plasma-Engraved Co2N Nanostructures toward High-Performance Alkaline Hydrogen Evolution
| Autor: | Jiageng Zheng, Xiaodong Li, Aoni Xu, Angjian Wu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Hydrogen chemistry.chemical_element 02 engineering and technology Electrolyte Overpotential Surface engineering 010402 general chemistry 021001 nanoscience & nanotechnology Engraving Electrochemistry 01 natural sciences 0104 chemical sciences chemistry Chemical engineering visual_art visual_art.visual_art_medium Surface modification Water splitting General Materials Science 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 13:21231-21240 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.1c01698 |
| Popis: | Hydrogen generated by electrochemical water splitting is an attractive alternative to fossil fuels. Herein, we developed hollow-like Co2N nanoarrays that serve as electrocatalysts for the hydrogen evolution reaction (HER) with surface engineering by argon plasma. The argon plasma-engraved Co2N nanoarrays (Ar-Co2N/CC) represent a dramatic catalytic performance for the HER with an overpotential of 34 mV at a current density of 10 mA cm-2 in an alkaline electrolyte, as well as outstanding durability of 240 h. Characterization experiments and density functional theory (DFT) calculations suggest that the enhanced HER activity is due to the rational coordination environment of Co, which can be tuned by Ar plasma engraving. Based on our research, one new view for conducting exceptional catalyst surface modification engineering via plasma engraving might be established. |
| Databáze: | OpenAIRE |
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