Femtosecond Direct Laser Interference Patterning of Nickel Electrodes for Improving Electrochemical Properties

Research output: Contribution to journalResearch articleContributedpeer-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 languageEnglish
Pages (from-to)102-110
Number of pages9
JournalJournal of laser micro nanoengineering
Volume19
Issue number2
Publication statusPublished - Sept 2024
Peer-reviewedYes

External IDs

Scopus 85204807880

Keywords

Sustainable Development Goals

Keywords

  • alkaline electrolysis, direct laser interference patterning, hydrogen evolution reaction, nickel electrodes