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- W2024431488 abstract "Carbon-supported Co(OH)2 and Ni(OH)2 catalysts are prepared to examine the mechanism of oxygen reduction reaction (ORR) on hydroxide catalysts. ORR via the 4-electron transfer pathway on a hydroxide undergoes oxidation of hydroxide by O2 to form oxyhydroxide, followed by electrochemical reaction of oxyhydroxide to regain hydroxide. β-Ni(OH)2 has the same crystal structure and lattice parameters as β-Co(OH)2, but it exhibits a poorer catalytic activity toward ORR than β-Co(OH)2 at a low temperature. The poor catalytic activity of Ni(OH)2/C can be attributed to the difficulty in Ni(OH)2 oxidation and the slow kinetics of NiOOH electroreduction to Ni(OH)2. The catalytic activity of the Ni(OH)2/C catalyst is significantly improved through elevating the operation temperature because Ni(OH)2 oxidation to NiOOH and NiOOH electroreduction are improved at a high temperature. A model of ORR via the 4-electron transfer pathway on transition metal hydroxides is suggested and discussed." @default.
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- W2024431488 date "2011-06-01" @default.
- W2024431488 modified "2023-10-18" @default.
- W2024431488 title "Oxygen reduction reaction via the 4-electron transfer pathway on transition metal hydroxides" @default.
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- W2024431488 doi "https://doi.org/10.1016/j.jpowsour.2011.01.102" @default.
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