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

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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.

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Acknowledgements

This research was sponsored by the Natural Science Basic Research Plan in Shaanxi Province of China (No. 2018JM5093), the Fundamental Research Funds for the Central Universities (Nos. GK201702009 and GK201901002), and 111 Project (No. B14041).

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  1. Tian-Jiao Wang and Xiaoyang Liu contributed equally to this work.

Authors and Affiliations

  1. 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, Xi’an, 710062, China

    Tian-Jiao Wang, Xiaoyang Liu, Ziwei Deng & Yu Chen

  2. School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710062, China

    Ying Li & Fumin Li

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  1. Tian-Jiao Wang
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Wang, TJ., Liu, X., Li, Y. et al. Ultrasonication-assisted and gram-scale synthesis of Co-LDH nanosheet aggregates for oxygen evolution reaction. Nano Res. 13, 79–85 (2020). https://doi.org/10.1007/s12274-019-2575-5

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