High-Index Faceted Porous Co3O4 Nanosheets with Oxygen Vacancies for Highly Efficient Water Oxidation
By Wei, Renjie; Fang, Ming; Dong, Guofa; Lan, Changyong; Shu, Lei; Zhang, Heng; Bu, Xiuming; Ho, Johnny C.
Published in ACS Applied Materials & Interfaces
2018
Abstract
Because of sluggish kinetics of the oxygen evolution reaction (OER), designing low-cost, highly active, and stable electrocatalysts for OER is important for the development of sustainable electrochemical water splitting. Here, 112 high-index facet exposed porous Co3O4 nanosheets with oxygen vacancies on the surface have been successfully synthesized via a simple hydrothermal method followed by NaBH4 reduction. As compared with the pristine and other faceted porous Co3O4 nanosheets (e.g., 110 and 111), the as-prepared 112 faceted porous nanosheets exhibit a much lower overpotential of 318 mV at a current density of 10 mA cm
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