Direct Integration of Strained‐Pt Catalysts into Proton‐Exchange‐Membrane Fuel Cells with Atomic Layer Deposition Academic Article uri icon

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abstract

  • The design and fabrication of lattice-strained platinum catalysts achieved by removing a soluble core from a platinum shell synthesized via atomic layer deposition, is reported. The remarkable catalytic performance for the oxygen reduction reaction (ORR), measured in both half-cell and full-cell configurations, is attributed to the observed lattice strain. By further optimizing the nanoparticle geometry and ionomer/carbon interactions, mass activity close to 0.8 A mgPt -1 @0.9 V iR-free is achievable in the membrane electrode assembly. Nevertheless, active catalysts with high ORR activity do not necessarily lead to high performance in the high-current-density (HCD) region. More attention shall be directed toward HCD performance for enabling high-power-density hydrogen fuel cells.

authors

  • Xu, Shicheng
  • Wang, Zhaoxuan
  • Dull, Sam
  • Liu, Yunzhi
  • Lee, Dong Un
  • Lezama Pacheco, Juan S
  • Orazov, Marat
  • Vullum, Per Erik
  • Dadlani, Anup Lal
  • Vinogradova, Olga
  • Schindler, Peter
  • Tam, Qizhan
  • Schladt, Thomas D
  • Mueller, Jonathan E
  • Kirsch, Sebastian
  • Huebner, Gerold
  • Higgins, Drew
  • Torgersen, Jan
  • Viswanathan, Venkatasubramanian
  • Jaramillo, Thomas Francisco
  • Prinz, Fritz B

publication date

  • July 2021