AUTHOR=Tong Yong-Li , Xing Lei , Dai Mei-Zhen , Wu Xiang 

TITLE=Hybrid Co3O4@Co9S8 Electrocatalysts for Oxygen Evolution Reaction

JOURNAL=Frontiers in Materials

VOLUME=6

YEAR=2019

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2019.00233

DOI=10.3389/fmats.2019.00233

ISSN=2296-8016

ABSTRACT=<p>It is very essential to design an efficient and low-cost electrocatalyst for oxygen evolution reaction (OER). In this work, we report synthesis of Co<sub>3</sub>O<sub>4</sub>@Co<sub>9</sub>S<sub>8</sub> heterostructures (Co-HSs) by employing Co<sub>3</sub>O<sub>4</sub> nanowires (Co-NWs) as the precursor on nickel foam though a facile hydrothermal method. The unique structures can combine the advantages of one-dimensional nanowires and two-dimensional nanosheets, simultaneously, which possess plentiful defect atoms and active sites. The as-prepared Co-HSs exhibit excellent electrocatalytic performance for OER, which present a low overpotential of 80 mV at 10 mA cm<sup>−2</sup> during OER process and small Tafel slope of 107.2 mV dec<sup>−1</sup>.</p>