A facile method for preparing amorphous Co-Ni-Cu ternary hydroxides as an efficient oxygen evolution reaction electrocatalyst

摘要

High-efficient, low cost and stable electrocatalysts for oxygen evolution reaction (OER) in alkaline solution are very significant for mass production of clean hydrogen fuels. Herein, an amorphous ternary Co-Ni-Cu lamellar hydroxide was synthesized using a facile co-precipitation method. When the molar ratio of Co:Ni:Cu is 8:3:5, the as-prepared hydroxides displayed remarkable activities towards OER in 0.1 M KOH with a low overpotential (337 mV), small Tafel slope (78 mV dec(-1)) and outstanding stability. These properties are much better than those with different molar ratio. The facile preparation method and excellent electrocatalytic properties endowed this material as a potential candidate for precious metal catalysts for OER. (C) 2020 Elsevier B.V. All rights reserved.