CoMo layered double hydroxide equipped with carbon nanotubes for electrocatalytic oxygen evolution reaction

• Published in: Nanotechnology 2023-02, Vol.34 (6), p.65401
• Main Authors: Yan, Xuesheng, Wang, Zhaolong, Bao, Jian, Song, Yanhua, She, Xiaojie, Yuan, Junjie, Hua, Yingjie, Lv, Guoai, Li, Huaming, Xu, Hui
• Format: Article
• Language: English
• Subjects: alkaline solution; carbon nanotubes (CNTs); hybridization; layered double hydroxides (LDH); oxygen evolution reaction (OER)
• ISSN: 0957-4484; 1361-6528
• DOI: 10.1088/1361-6528/ac9abd

To carry out effective resource reforming of sustainable electricity, hydrogen production by electrochemical water splitting provides an eco-friendly and economical way. Nevertheless, the oxygen evolution reaction (OER) at the anode is limited by the slow reaction process, which hinders the large-scale development and application of electrolysis technology. In this work, we present an electrocatalyst with superior OER performance, which attributed to the abundant active sites and good electronic conductivity. The two-dimensional CoMo Layered Double Hydroxide nanosheets are synthesized and deposited on conductive carbon nanotubes (CoMo LDH/CNTs), and then hybrid composites show better catalytic performance than their undecorated counterpart under identical conditions. Specifically, CoMo LDH/CNTs exhibit the low overpotential of 268 mV to obtain 10 mA cm −2 and satisfactory stability (more than 40 h). We emphasize that this hybridization strategy with a conductive supporting framework could design more abundant and low-cost OER electrocatalysts to minimize electrical energy consumption, thereby achieving efficient conversion between energy sources.