Hydrotalcite-like Ni(OH)2 Nanosheets in Situ Grown on Nickel Foam for Overall Water Splitting

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• 作者：Yuan Rao ; Yang Wang ; Hui Ning ; Peng Li ; Mingbo Wu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：December 14, 2016
• 年：2016
• 卷：8
• 期：49
• 页码：33601-33607
• 全文大小：466K
• ISSN：1944-8252

文摘

Designing economical and high-efficiency electrocatalysts for overall water splitting is urgently needed but remains a long and arduous task. Herein, we synthesized hydrotalcite-like Ni(OH)₂ nanosheets growing on Ni foam (Ni(OH)₂/NF) via a facile one-pot hydrothermal method. With the assistance of a rotating oven, Ni(OH)₂ nanosheets demonstrate a regular hexagonal morphology and homogeneous distribution. The resultant Ni(OH)₂/NF electrode shows superior electrocatalytic activity and durability for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), as well as the overall water splitting. The Ni(OH)₂/NF electrode delivers 20 mA·cm^–2 at an overpotential of 172 mV for HER, 50 mA·cm^–2 at an overpotential of 330 mV for OER, and 10 mA·cm^–2 at a cell voltage of 1.68 V for water electrolysis in 1.0 M KOH. The present study demonstrates a feasible and effective strategy to prepare highly efficient electrocatalysts for water electrolysis.