过渡(遗传学)
氧气
化学物理
心理学
析氧
材料科学
纳米技术
天体生物学
凝聚态物理
化学
物理
量子力学
物理化学
基因
生物化学
电化学
电极
作者
Chunxu Jia,Zhen Chao,Lichang Yin,Huaze Zhu,Peipei Du,Ali Han,Gang Liu,Hui‐Ming Cheng
出处
期刊:Social Science Research Network
[Social Science Electronic Publishing]
日期:2022-01-01
摘要
Highly active, robust and low-cost oxygen evolution reaction (OER) electrodes are urgently required to satisfy the industrial hydrogen production via water electrolysis. However, numerous earth-abundant materials have severely suffered from the low stability over thousands of hours at large current densities. Herein, ultrathin NiFeOOH Nanosheets with abundant undercoordinated Fe active sites on a Ni foam electrode for OER were obtained via an electrochemically topologic transition process. They deliver a low overpotentials of 210 mV at 10 mA cm -2 and a small Tafel slope of 32 mV dec -1 owing to the abundant Fe active sites and exhibit high stability at high current densities of 400~600 mA cm -2 over 2000 h due to their strong adhesion to Ni foam. Moreover, only a 370 mV overpotentials is required to produce a high current density of 400 mA cm -2 in a two-electrode water electrolysis system, demonstrating an energy efficiency as high as ~77%.
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