Xu, ShichengWang, ZhaoxuanDull, SamLiu, YunzhiLee, Dong UnPacheco, Juan S. LezamaOrazov, MaratVullum, Per ErikDadlani, Anup LalVinogradova, OlgaSchindler, PeterTam, QizhanSchladt, Thomas D.Mueller, Jonathan E.Kirsch, SebastianHuebner, GeroldHiggins, DrewTorgersen, JanViswanathan, VenkatasubramanianJaramillo, Thomas FranciscoPrinz, Fritz B.2023-12-052023-12-052021-07-28Xu, S., Wang, Z., Dull, S., Liu, Y., Lee, D. U., Pacheco, J. S. L., Orazov, M., Vullum, P. E., Dadlani, A. L., Vinogradova, O., Schindler, P., Tam, Q., Schladt, T. D., Mueller, J. E., Kirsch, S., Huebner, G., Higgins, D., Torgersen, J., Viswanathan, V., Jaramillo, T. F., Prinz, F. B., Direct Integration of Strained-Pt Catalysts into Proton-Exchange-Membrane Fuel Cells with Atomic Layer Deposition. Adv. Mater. 2021, 33, 2007885. https://doi.org/10.1002/adma.2020078851521-4095https://udspace.udel.edu/handle/19716/33648This article was originally published in Advanced Materials. The version of record is available at: https://doi.org/10.1002/adma.202007885. © 2021 The Authors. Advanced Materials published by Wiley-VCH GmbHThe 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.en-USAttribution 4.0 Internationalfuel cellslattice strainmembrane electrode assemblyoxygen reduction reactionrotating disk electrodesaffordable and clean energyArticle