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Nano Research

Article Title

Ultrasonication-assisted and gram-scale synthesis of Co-LDH nanosheet aggregates for oxygen evolution reaction

Authors

Tian-Jiao Wang, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Key Laboratory of Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xian 710062, China
Xiaoyang Liu, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Key Laboratory of Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xian 710062, China
Ying Li, Second address, Department, University, City and Postcode, Country School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xian 710062, China
Fumin Li, Second address, Department, University, City and Postcode, Country School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xian 710062, China
Ziwei Deng, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Key Laboratory of Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xian 710062, China
Yu Chen, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Key Laboratory of Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xian 710062, China

Keywords

electrochemical water splitting, oxygen evolution reaction, gram-scale synthesis, layered double hydroxides, nanosheet aggregates

Abstract

Electrochemical water splitting (EWS) is a highly clean and efficient method for high-purity hydrogen production. Unfortunately, EWS suffers from the sluggish and complex oxygen evolution reaction (OER) kinetics at anode. At present, the efficient, stable, and low-cost non-precious metal based OER electrocatalyst is still a great and long-term challenge for the future industrial application of EWS technology. Herein, we develop a simple and fast approach for gram-scale synthesis of flower-like cobalt-based layered double hydroxides nanosheet aggregates by ultrasonic synthesis, which show outstanding electrocatalytic performance for the oxygen evolution reaction in alkaline media, such as preeminent stability, small overpotential of 300 mV at 10 mA·cm−2 and small Tafel slope of 110 mV·dec−1.

Graphical Abstract

Publisher

Tsinghua University Press

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