Contact

Dr. Xuegeng Yang

Head Electrochemical Systems
Fluid Dynamics Resource Technology Processes
x.yangAthzdr.de
Phone: +49 351 260 3863
Fax: +49 351 260 13863

Hannes Rox

h.roxAthzdr.de

Electrode surface functionalization

Electrode surface functionalization plays a vital role in improving the efficiency of electrolyzers, particularly by managing gas bubble behavior during electrochemical reactions. Gas bubble management involves enhancing bubble release, minimizing bubble adhesion, and ensuring efficient bubble transport to reduce mass transfer limitations and energy losses.

Goal: By changing the wettablity, surface micro/nanostructuring, checmial modification etc. to achive

  • Reduced Overpotential: Faster bubble detachment minimizes resistance at the electrode interface.
  • Improved Mass Transport: Efficient bubble removal enhances access to reactants at the active sites.
  • Enhanced Durability: Preventing gas-induced mechanical stress on electrodes ensures prolonged operational life.

Techiniques

Jet electrodeposition, laser structuring, pulsed laser deposition

Results:

Oxygen bubble produced on a line-patterned electrode surface:

Contact angles of different surfaces:

JW
 (a) SUS304 bare substrate; (b) SUS304 with FAS; (c) after laser texturing (50 μm); (d) after jet electrodeposition.

Publications:

1. W. Jiang, M. Huang, Y. Lao, X. Yang, C. Wang, Z. Tian, S. Zhou, G. Mutschke, K. Eckert. Experimental and numerical investigations of Ni-Co-SiO2 alloy films deposited by magnetic-field-assisted jet plating. Surface and Coatings Technology, 423, 127583, 2021. doi.org/10.1016/j.surfcoat.2021.127583

2. W. Jiang, M. Qiu, L. Shen, G. Lou, X. Yang, K. Eckert and Z. Tian. Effect of deposition current density on the Co–Ni/SiO2 alloy composite coatings using scanning jet electrodeposition. Surface Topography: Metrology and Properties, 9:015027, 2021. DOI 10.1088/2051-672X/abe594.

3.Hannes Rox, Fabian Ränke, Jonathan Mädler, Mateusz M. Marzec, Krystian Sokolowski, Robert Baumann, Homa Hamedi, Xuegeng Yang, Gerd Mutschke, Leon Urbas, Andrés Fabián Lasagni, Kerstin Eckert. Boosting electrode performance and bubble management via Direct Laser Interference Patterning. Submitted to ACS Applied Materials & Interfaces, 2024. DOI: 10.48550/arXiv.2411.03373

4.L. Krause, K. Skibińska, H. Rox, R. Baumann, M. M Marzec, X. Yang, G. Mutschke, P. Zabiński, A. Lasagni, K. Eckert, Hydrogen Bubble Size Distribution on Nanostructured Ni Surfaces: Electrochemically Active Surface Area Versus Wettability, ACS Applied Materials & Interfaces 15 (14), 18290-18299