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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 μm in length. Pt-coated CoNWs (PtCoNWs) are characterized for activity in the oxygen reduction reaction (ORR) with rotating disk electrode half-cells i...
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Published in: | ACS catalysis 2014-08, Vol.4 (8), p.2680-2686 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Cobalt nanowires (CoNWs) are coated with platinum (Pt) by partial galvanic displacement, forming core/shell wires 200–300 nm in diameter and 100–200 μm in length. Pt-coated CoNWs (PtCoNWs) are characterized for activity in the oxygen reduction reaction (ORR) with rotating disk electrode half-cells in 0.1 M perchloric acid electrolytes. The resulting catalysts demonstrate ORR-specific activities in the range 2053–2783 μA cmPt −2, comparable to the specific activity of polycrystalline Pt. The specific activities of PtCoNWs increase with decreasing Pt content and exhibit a corresponding increase in Pt lattice compression. PtCoNWs have exhibited a maximum mass activity of 793 mA mgPt −1, 2.6 times greater than carbon-supported Pt nanoparticles. |
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ISSN: | 2155-5435 2155-5435 |
DOI: | 10.1021/cs500370q |