Journal
NANO RESEARCH
Volume 13, Issue 1, Pages 79-85Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-019-2575-5
Keywords
electrochemical water splitting; oxygen evolution reaction; gram-scale synthesis; layered double hydroxides; nanosheet aggregates
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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 center dot cm(-2) and small Tafel slope of 110 mV center dot dec(-1).
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