Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 133, Issue 36, Pages 14396-14403Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja2047655
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Funding
- Argonne National Laboratory, a U.S. Department of Energy, Office of Science Laboratory [DE-AC02-06CH11357]
- U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Fuel Cell Technologies
- Scientific User Facilities Division, Office of Basic Energy Sciences, the U.S. Department of Energy
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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.
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