标题：Bottom-up fabrication of ultrathin CoFe layered double hydroxide nanosheets on oxidized carbon nanotube as a water oxidation electrocatalyst
作者：Li Z.; Sun Y.; Liu X.; He P.; Hou W.; Zhan T.
作者机构：[Li, Z] Key Laboratory of Sensor Analysis of Tumor Marker (Ministry of Education), State Key Laboratory Base of Eco-chemical Engineering, College of C 更多
通讯作者地址：[Zhan, T] Key Laboratory of Sensor Analysis of Tumor Marker (Ministry of Education), State Key Laboratory Base of Eco-chemical Engineering, College of 更多
来源：Journal of Alloys and Compounds
关键词：CoFe layered Double hydroxide; Oxidized carbon nanotube; Oxygen evolution reaction; Ultrathin nanosheets; Water oxidation
摘要：Although being of significance for water spitting, exploring the high-efficiency and low-cost electrocatalysts toward oxygen evolution reaction remains a considerable challenge. Here, we develop a facile bottom-up method for the direct growth of ultrathin CoFe layered double hydroxide nanosheets on oxidized carbon nanotube surface in formamide aqueous solution. The preparation strategy results in the ultrathin nature of hydrotalcite-like layers with less than 5 nm thickness. The resultant composite offers a larger electrochemically active surface area and faster mass transfer rate owing to the more exposed active sites. This electrocatalyst exhibits superior oxygen evolution reaction performance to the bulk form with lower onset potential, smaller Tafel slope, and robust durability in 0.1 M KOH solution. The better water oxidation activity can be attributable to the strong synergistic effects of CoFe layered double hydroxide nanosheets and oxidized carbon nanotubes because of their ultrathin assembling and more available catalytic centers. © 2020 Elsevier B.V.