Au Promoted Nickel–Iron Layered Double Hydroxide Nanoarrays: A Modular Catalyst Enabling High-Performance Oxygen Evolution

• DOI: 10.1021/acsami.7b03033
• Publication Date: 2017-05-23T15:23:34Z
• Authors: Wenxin Zhu; Lizhi Liu; Zhihao Yue; Wentao Zhang; Xiaoyue Yue; Jing Wang; Shaoxuan Yu; Li Wang; Jianlong Wang
• Keywords: Oxygen evolution; Layered double hydroxides

Oxygen evolution reaction (OER) plays a key role in various energy conversion and storage technologies, such as water electrolysis, regenerative fuel cells, rechargeable metal–air batteries. However, the slow kinetics of OER limit performance commercialization devices. Herein, we report on NiFe LDH@Au hybrid nanoarrays Ni foam for much enhanced OER. By hybridization electronegative Au LDH with intrinsic remarkable catalytic activity, this modular electrode could drive an overall ultrahigh-performance robust base demand overpotentials only 221, 235, 270 mV to afford 50, 100, 500 mA cm–2, respectively. Also, it exhibits superior activity durability toward 30 wt % KOH.