Femtosecond Direct Laser Interference Patterning of Nickel Electrodes for Improving Electrochemical Properties
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
The present work utilizes Direct Laser Interference Patterning (DLIP) to impart periodic microstructures onto the surface of nickel foils. A pulsed laser source emitting green radiation (514 nm) with pulse duration between 282 fs and 1 ps is utilized to produce line and cross-like pattern geometries having a spatial period of 3.0 mu m and a maximum structure depth of similar to 2.8 mu m. Both the pulse duration and number of consecutive scans are varied in order to assess their influence on the structure formation. Afterwards, the treated Ni-electrodes are used for alkaline water electrolysis. The most active electrode exhibits an overpotential of -227 mV at a current density of -0.5 A cm(-2) for the Hydrogen Evolution Reaction (HER). Thus, the technique here proposed permitted a 51 % reduction in the overpotential of the HER compared to the untreated Ni-electrode, opening up possibilities for the development of more efficient electrodes for hydrogen production.
Details
Original language | English |
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Pages (from-to) | 102-110 |
Number of pages | 9 |
Journal | Journal of laser micro nanoengineering |
Volume | 19 |
Issue number | 2 |
Publication status | Published - Sept 2024 |
Peer-reviewed | Yes |
External IDs
Scopus | 85204807880 |
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Keywords
Sustainable Development Goals
Keywords
- Alkaline electrolysis, Direct laser interference patterning, Hydrogen evolution reaction, Nickel electrodes