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Peer-reviewedCC BYSmall science

Laser-Structured Nickel Electrodes for Enhanced Hydrogen Evolution Kinetics in Alkaline Media at Elevated Temperature.

  • Mayla Selene Barrientos1
  • Lis Geraldine Zschach1
  • Robert Baumann1
  • Andrés Fabián Lasagni1,2
  1. 1Institut für Fertigungstechnik Technische Universität Dresden Dresden Germany.
  2. 2Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS Dresden Germany.
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Abstract

Tailoring the surface morphology of electrocatalysts is one potential opportunity for improving the hydrogen evolution reaction (HER) in alkaline media. Direct laser interference patterning (DLIP) emerged as a promising surface engineering technique for enhancing the HER performance of nickel electrocatalysts in alkaline media. In this study, DLIP is employed to fabricate periodic line-like microstructures on Ni electrodes using a picosecond-pulsed laser system (λ = 1064 nm, τ = 70 ps). By varying cumulated laser fluence up to 2.4 kJ cm⁻², a maximum structure depth of 2.35 ± 0.04 μm and interfacial area ratio up to 87% is reached. HER is evaluated by linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) at 22 and 60 °C. The DLIP-structured electrodes exhibit significantly enhanced HER activity compared with untreated Ni, showing overpotential reductions of up to 28% at 22 °C and 53% at 60 °C, in conjunction with an increase in electrochemically active surface area (ECSA) from 2.24 to 31.04 cm² at 22 °C and from 1.95 to 74.84 cm² at 60 °C, respectively. These findings highlight the favorable interplay between DLIP-induced surface modification and thermally enhanced HER kinetics.

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Cite

BibTeXRIS
BibTeX
@article{barrientos2026laserstructured,
  title = {{Laser-Structured Nickel Electrodes for Enhanced Hydrogen Evolution Kinetics in Alkaline Media at Elevated Temperature.}},
  author = {Mayla Selene Barrientos and Lis Geraldine Zschach and Robert Baumann and Andrés Fabián Lasagni},
  journal = {Small science},
  year = {2026},
  month = oct,
  doi = {10.1002/smsc.70426},
  url = {https://europepmc.org/article/MED/42928922},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Laser-Structured Nickel Electrodes for Enhanced Hydrogen Evolution Kinetics in Alkaline Media at Elevated Temperature.
AU  - Mayla Selene Barrientos
AU  - Lis Geraldine Zschach
AU  - Robert Baumann
AU  - Andrés Fabián Lasagni
PY  - 2026
DA  - 2026/10/25
JO  - Small science
DO  - 10.1002/smsc.70426
UR  - https://europepmc.org/article/MED/42928922
AB  - Tailoring the surface morphology of electrocatalysts is one potential opportunity for improving the hydrogen evolution reaction (HER) in alkaline media. Direct laser interference patterning (DLIP) emerged as a promising surface engineering technique for enhancing the HER performance of nickel electrocatalysts in alkaline media. In this study, DLIP is employed to fabricate periodic line-like microstructures on Ni electrodes using a picosecond-pulsed laser system (λ = 1064 nm, τ = 70 ps). By varying cumulated laser fluence up to 2.4 kJ cm⁻², a maximum structure depth of 2.35 ± 0.04 μm and interfacial area ratio up to 87% is reached. HER is evaluated by linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) at 22 and 60 °C. The DLIP-structured electrodes exhibit significantly enhanced HER activity compared with untreated Ni, showing overpotential reductions of up to 28% at 22 °C and 53% at 60 °C, in conjunction with an increase in electrochemically active surface area (ECSA) from 2.24 to 31.04 cm² at 22 °C and from 1.95 to 74.84 cm² at 60 °C, respectively. These findings highlight the favorable interplay between DLIP-induced surface modification and thermally enhanced HER kinetics.
SN  - 2688-4046
ER  -