title: Design and synthesis of bimetallic electrocatalyst with multilayered Pt-skin surfaces.
abstract: Advancement in heterogeneous catalysis relies on the capability of altering material structures at the nanoscale, and that is particularly important for the development of highly active electrocatalysts with uncompromised durability. Here, we report the design and synthesis of a Pt-bimetallic catalyst with multilayered Pt-skin surface, which shows superior electrocatalytic performance for the oxygen reduction reaction (ORR). This novel structure was first established on thin film extended surfaces with tailored composition profiles and then implemented in nanocatalysts by organic solution synthesis. Electrochemical studies for the ORR demonstrated that after prolonged exposure to reaction conditions, the Pt-bimetallic catalyst with multilayered Pt-skin surface exhibited an improvement factor of more than 1 order of magnitude in activity versus conventional Pt catalysts. The substantially enhanced catalytic activity and durability indicate great potential for improving the material properties by fine-tuning of the nanoscale architecture.
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Chao
authors.initials: C
authors.lastname: Wang
authors.forename: Miaofang
authors.initials: M
authors.lastname: Chi
authors.forename: Dongguo
authors.initials: D
authors.lastname: Li
authors.forename: Dusan
authors.initials: D
authors.lastname: Strmcnik
authors.forename: Dennis
authors.initials: D
authors.lastname: van der Vliet
authors.forename: Guofeng
authors.initials: G
authors.lastname: Wang
authors.forename: Vladimir
authors.initials: V
authors.lastname: Komanicky
authors.forename: Kee-Chul
authors.initials: KC
authors.lastname: Chang
authors.forename: Arvydas P
authors.initials: AP
authors.lastname: Paulikas
authors.forename: Dusan
authors.initials: D
authors.lastname: Tripkovic
authors.forename: John
authors.initials: J
authors.lastname: Pearson
authors.forename: Karren L
authors.initials: KL
authors.lastname: More
authors.forename: Nenad M
authors.initials: NM
authors.lastname: Markovic
authors.forename: Vojislav R
authors.initials: VR
authors.lastname: Stamenkovic