Femtosecond-laser structuring of Ni electrodes for highly active hydrogen evolution

Rauscher, T.; Müller, Christian I.; Gabler, Andreas; Gimpel, Thomas; Köhring, Michael; Kieback, Bernd; Schade, Wolfgang; Röntzsch, Lars

doi:10.1016/j.electacta.2017.07.074

Cited by 40 publications

(26 citation statements)

References 56 publications

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“…Firstly, the surface area enlargement is caused by the formation of micrometer-sized spikes and secondly by a significant amount of a redeposited nanosized ablation product, which covers the spike structure. The present results for Ni CLPs 0 ∘ are in good agreement with published data on CLP structures [63,64].…”

Section: Resultssupporting

confidence: 92%

Spiky Nickel Electrodes for Electrochemical Oxygen Evolution Catalysis by Femtosecond Laser Structuring

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Koch

Lilienkamp

et al. 2018

International Journal of Electrochemistry

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Micro- and nanostructured Ni/NiO surfaces were generated by femtosecond laser structuring for oxygen evolution reaction in alkaline water electrolysis cells. For two different angles between the laser beam and the nickel surface, two different types of laser-structured electrodes were prepared, characterized, and compared with a plane tempered nickel electrode. Their electrochemical activities for the oxygen evolution reaction were tested by using cyclic and linear sweep voltammetry. The chemical surface composition was investigated by X-ray photoelectron spectroscopy. Laser structuring increased the overall electrochemical performance by more than one order of magnitude. The overpotential of the laser-structured electrodes for the oxygen evolution reaction was decreased by more than 100 mV due to high defect densities of the structures created by the laser ablation process.

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Section: Resultssupporting

confidence: 92%

Spiky Nickel Electrodes for Electrochemical Oxygen Evolution Catalysis by Femtosecond Laser Structuring

Best

Koch

Lilienkamp

et al. 2018

International Journal of Electrochemistry

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“…The area that is occupied by a gas bubble does not support charge conversion. To increase effectivity it is highly desired to release gas bubbles as quick as possible from the surface of the electrode [27][28][29][30]. In microbial electrolysis cells an additional advantage is apparent.…”

Section: Introductionmentioning

confidence: 99%

Enhanced performance of microbial electrolysis cells using microstructured electrodes

Keil

Windisch

Joukov

et al. 2021

Materialwissenschaft Werkst

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A microbial electrolysis cell is set up with the purpose to realize an efficient powerto-gas process. Both hydrogen production by electrolysis and biomethanization proceed in the same reactor cell. In particular, the formation of hydrogen bubbles is strongly governed by the surface properties of the used stainless steel electrodes. Here, we introduce surface topography modifications on the micron-scale to enhance the electrical transport in the cell and support charge conversion into hydrogen. Furthermore, it is analyzed if hydrogen bubble detachment can be supported to form smaller bubbles that can be efficiently converted into methane. A positive influence on the electrical transport is found and explained by a surfacecontrolled suppression of bio-film passivation.

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“…The technique has been already used to improve the performance of alkaline electrolysis electrodes. [23][24][25] To the best of our knowledge, it is the rst time such an approach is used for titaniumbased PTLs in PEMWE. The laser-structuring process step is interesting both for a more fundamental understanding in the physicochemical and electrochemical processes at the PTL/CLinterface and for the industry to further optimize the components.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond laser-induced surface structuring of the porous transport layers in proton exchange membrane water electrolysis

et al. 2020

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Femtosecond-laser structuring of Ni electrodes for highly active hydrogen evolution

Cited by 40 publications

References 56 publications

Spiky Nickel Electrodes for Electrochemical Oxygen Evolution Catalysis by Femtosecond Laser Structuring

Spiky Nickel Electrodes for Electrochemical Oxygen Evolution Catalysis by Femtosecond Laser Structuring

Enhanced performance of microbial electrolysis cells using microstructured electrodes

Femtosecond laser-induced surface structuring of the porous transport layers in proton exchange membrane water electrolysis

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