Yadav A A, Hunge Y M, Kulkarni S B, Terashima Chiaki, Kang Seok-Won
Department of Automotive Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea.
Photocatalysis International Research Center, Tokyo University of Science, Yazamaki, Noda 278-8510, Chiba, Japan.
J Colloid Interface Sci. 2020 Sep 15;576:476-485. doi: 10.1016/j.jcis.2020.04.100. Epub 2020 Apr 27.
The study deals with the hydrothermal growth of a CuCoO hierarchical 3D nanoflower-like array on carbon cloth (CuCoO@CC), which is a useful multifunctional electrode. The electrocatalytic oxygen evolution reaction (OER) study of the CuCoO@CC electrode shows high durability and good activity in 1 M KOH. As an energy storage electrode, it shows a high specific capacitance of 1438 Fg at 10 mA cm in a 3 M KOH electrolyte. The electrochemical stability of the CuCoO@CC electrode was tested for 5000 cycles at 10 mA cm, and it showed 98.6% stability. This CuCoO@CC electrode produces a capacitance of 10 mA cm at an overpotential of 288 mV for the OER, with a Tafel slope of 64.2 mV dev. The electrochemical stability measured at an overpotential of 292 mV for 12 h at 10 mA cm shows good electronic stability in an alkaline medium. The enhanced electrochemical performance of the CuCoO@CC electrode may be due to the Cu and Co counterparts in addition to the high surface area. The CuCoO@CC electrode is a simple, flexible, and cost-effectivive electrode in both electrocatalytic OER and energy storage applications.
该研究涉及在碳布（CuCoO@CC）上水热生长CuCoO分级三维纳米花状阵列，这是一种有用的多功能电极。对CuCoO@CC电极的电催化析氧反应（OER）研究表明，其在1 M KOH中具有高耐久性和良好的活性。作为储能电极，在3 M KOH电解液中，当电流密度为10 mA cm时，它显示出1438 Fg的高比电容。对CuCoO@CC电极在10 mA cm下进行了5000次循环的电化学稳定性测试，结果显示其稳定性为98.6%。该CuCoO@CC电极在OER过电位为288 mV时产生10 mA cm的电容，塔菲尔斜率为64.2 mV dec。在10 mA cm下，在292 mV过电位下测量12 h的电化学稳定性表明，其在碱性介质中具有良好的电子稳定性。CuCoO@CC电极电化学性能的增强可能归因于除高表面积外的铜和钴成分。CuCoO@CC电极在电催化OER和储能应用中都是一种简单、灵活且具有成本效益的电极。
