Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6601124 | Electrochemistry Communications | 2016 | 4 Pages |
Abstract
Activities for the oxygen reduction reaction (ORR) were investigated on Ni low index surfaces modified by electrochemical deposition of Pt (Pt/Ni(hkl)) and then thermal annealing. The ORR current density at 0.9Â V (RHE) of the Pt/Ni(111) without annealing is three times higher than that of Pt(111). However, the Pt/Ni(111) without annealing has a low durability, with the activity reduction of more than 50% after 1000 potential cycles between 0.6Â V and 1.0Â V. The catalytic activity and durability are improved by annealing of Pt/Ni(111). The ORR activity of the Pt/Ni(111) with annealing at 650Â K is 1.7 times higher than that without annealing and the decrease of the activity is less than 10% after 1000 potential cycles. The annealing process stabilizes the Pt-rich shell on Ni(111).
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Physical Sciences and Engineering
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Authors
Tomoaki Kumeda, Hiroto Kimura, Nagahiro Hoshi, Masashi Nakamura,