Insight into the Boosted Electrocatalytic Oxygen Evolution Performance of Highly Hydrophilic Nickel–Iron Hydroxide

• DOI: 10.1021/acsaem.9b01952
• Publication Date: 2019-12-18T17:49:39Z
• Authors: Yi Wei; Cheol-Hwan Shin; Emmanuel Batsa Te...; Byong-June Lee; Jong-Sung Yu
• Keywords: Overpotential; Oxygen evolution

Nickel–iron based materials are well-known catalysts for the oxygen evolution reaction (OER) and have been widely investigated. However, synergy between these two components is still controversial. Herein, we report a facile immersion method synthesis of binder-free nickel–iron hydroxide loaded on Ni foam (NiFe-OH/NF) with superior hydrophilic property high OER catalytic activity. The strong NiFe-OH/NF electrode significantly enhances an effective contact electrocatalyst aqueous electrolyte favors bubble detachment from electrode, facilitating electron transfer improving can achieve geometrical current density 100 mA cm–1 at extremely low overpotential (219 mV), along Tafel slope 56 mV dec–1 long-term stability in alkaline media, strongly indicating that hydrophilicity plays important role performance NiFe-OH/NF.