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Na0.86Co0.95Fe0.05O2 Layered Oxide As Highly Efficient Water Oxidation Electrocatalyst in Alkaline Media
journal contribution
posted on 2017-06-15, 00:00 authored by Jie Dai, Yinlong Zhu, Yubo Chen, Wei Zhou, Zongping ShaoElectrochemical energy
storage and conversion technologies, such
as water-splitting devices, rechargeable metal-air batteries, and
regenerative fuel cells, are promising alternatives to traditional
nonrenewable energy systems. Given the sluggish oxygen evolution reaction
(OER) in the above renewable-energy technologies, the development
of efficient OER electrocatalysts with high performance is of great
importance. Here, we demonstrate a layer-structured oxide Na0.86Co0.95Fe0.05O2 (NCF0.05) as a novel
electrocatalyst for efficient water oxidation in alkaline media. NCF0.05
shows enhanced performance, including lower overpotential, lower Tafel
slope and better stability than the parent Na0.86CoO2 (NC). Especially, the OER performance of NCF0.05 is comparable
to the state-of-the-art IrO2 catalyst. This enhanced catalytic
activity of NCF0.05 may be ascribed to the unusual synergistic interplay
between Fe and Co. A possible dual-metal-site mechanism was also proposed
for OER on NCF0.05.
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IrO 2 catalystperformanceNCF 0.05technologyNa 0.86 Co 0.95 Fe 0.05 O 2 Layered OxideAlkaline Media Electrochemical energy storageoxygen evolution reactionnonrenewable energy systemsparent Na 0.86 CoO 2regenerative fuel cellsOERelectrocatalystlayer-structured oxide Na 0.86 Co 0.95 Fe 0.05 O 2Efficient Water Oxidation Electrocatalyst
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