Activity for the oxygen reduction reaction of the single crystal electrode of Ni modified with Pt
| Autor: | Nagahiro Hoshi, Tomoaki Kumeda, Masashi Nakamura, Hiroto Kimura |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Annealing (metallurgy) Metallurgy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Catalysis lcsh:Chemistry lcsh:Industrial electrochemistry lcsh:QD1-999 Electrode Oxygen reduction reaction 0210 nano-technology Current density Single crystal lcsh:TP250-261 Nuclear chemistry |
| Zdroj: | Electrochemistry Communications, Vol 68, Iss, Pp 15-18 (2016) |
| ISSN: | 1388-2481 |
| DOI: | 10.1016/j.elecom.2016.04.005 |
| Popis: | 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 0.9 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 0.6 V and 1.0 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 650 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). Keyword: Oxygen reduction reaction, Single crystal electrode, Surface alloy, Ni, Pt skin |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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