Oxygen Reduction at PtNi Alloys in Direct Methanol Fuel Cells - Electrode Development and Characterization

Ali Karaca, Andreas Glusen, Klaus Wippermann, Scott Mauger, Ami Yang-Neyerlin, Steffen Woderich, Christoph Gimmler, Martin Muller, Guido Bender, Horst Weller, Marcelo Carmo, Detlef Stolten

Research output: Contribution to journalArticlepeer-review

2 Scopus Citations


Catalyst layers made from novel catalysts must be fabricated in a way that the catalyst can function to its full potential. To characterize a PtNi alloy catalyst for use in the cathode of Direct Methanol Fuel Cells (DMFCs), the effects of the manufacturing technique, ink composition, layer composition, and catalyst loading were here studied in order to reach the maximum performance potential of the catalyst. For a more detailed understanding, beyond the DMFCs performance measurements, we look at the electrochemically active surface area of the catalyst and charge-transfer resistance, as well as the layer quality and ink properties, and relate them to the aspects stated above. As a result, we make catalyst layers with optimized parameters by ultrasonic spray coating that shows the high performance of the catalyst even when containing less Pt than commercial products. Using this approach, we can adjust the catalyst layers to the requirements of DMFCs, hydrogen fuel cells, or polymer electrolyte membrane electrolysis cells.

Original languageAmerican English
Article number1115
Number of pages18
Issue number3
StatePublished - 2023

Bibliographical note

Publisher Copyright:
© 2023 by the authors.

NREL Publication Number

  • NREL/JA-5K00-85301


  • alloys
  • catalyst
  • charge-transfer resistance
  • DMFC
  • EIS
  • fuel cells
  • nickel
  • ORR
  • platinum
  • supported catalysts


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