3 years ago

Hexagonal Sphericon Hematite with High Performance for Water Oxidation

Taiwo Odedairo, Xuecheng Yan, Zhonghua Zhu, Kostya (Ken) Ostrikov, Xiangdong Yao
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. A cost-effective hexagonal sphericon hematite (Fe ≈ 98%) with predominant (110) facets for 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.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adma.201703792

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