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 µm and a maximum structure depth of ~ 2.8 µm. 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
ASJC Scopus subject areas
Keywords
- alkaline electrolysis, direct laser interference patterning, hydrogen evolution reaction, nickel electrodes