Hexagonal Sphericon Hematite with High Performance for Water Oxidation

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Odedairo, Taiwo
Yan, Xuecheng
Yao, Xiangdong
Ostrikov, Kostya Ken
Zhu, Zhonghua
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2017
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Abstract

A cost-effective hexagonal sphericon hematite with predominant (110) facets for the oxygen evolution reaction (OER) is demonstrated. Sequential incorporation of near-atomic uniformly distributed Ce species and Ni nanoparticles into selected sites of the hematite induces a complex synergistic integration phenomenon that enhances the overall catalytic OER performance. This cheap hexagonal sphericon hematite (Fe ≈ 98%) only needs a small overpotential (η) of 0.34 V to reach 10 mA cm−2, superior to commercial IrO2 and more expensive Co-, Ni-, and Li-based electrocatalysts.

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Advanced Materials

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29

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46

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Physical sciences

Other physical sciences not elsewhere classified

Chemical sciences

Engineering

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