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Title: Platinum - Coated Cobalt Nanowires as Oxygen Reduction Reaction Electrocatalysts

Cobalt nanowires (CoNWs) are coated with platinum (Pt) by partial galvanic displacement, forming core/shell wires 200 300 nm in diameter and 100 200 1m in length. PtCoNWs are characterized for activit y in the oxygen reduction reaction (ORR) with rotating disk electrode half5cells in 0.1 M perchloric acid electrolytes. The resulting catalysts demonstrate ORR specific activi ties in the range 2053 2783 1A cm Pt 2 , comparable to the specific activity of polycrystalline Pt. The specific activi ties of PtCoNWs increase with decreasing Pt content and exhibit a corresponding increase in Pt lattice compression. P tCoNWs have exhibited a maximum mass activity of 79 3 mA mg Pt 1 , 2.6 times greater than carbon5supported Pt nanopart icles.
 [1] ;  [2] ;  [1] ;  [2] ;  [1] ;  [3]
  1. National Renewable Energy Laboratory (NREL)
  2. ORNL
  3. Los Alamos National Laboratory (LANL)
Publication Date:
OSTI Identifier:
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Catalysis; Journal Volume: 4; Journal Issue: 00
Research Org:
Oak Ridge National Laboratory (ORNL)
Sponsoring Org:
Country of Publication:
United States