Abstract
AbstractDeveloping efficient electrocatalysts for water oxidation is of vital importance for the electrochemical production of hydrogen (H2) fuels. Herein, we report the hydrothermal synthesis of a NiTe2 nanosheet array anchored on Ti mesh (NiTe2/TM) through the topotactic transformation from a Ni(OH)2 nanoarray on the basis of an anion exchange reaction. As a robust non‐noble‐metal catalyst electrode for alkaline water oxidation, NiTe2/TM exhibits high activity and delivers a small overpotential of 315 mV to realize an anodic geometrical current density of 10 mA cm−2, with superior long‐term durability. It is suggested that the NiOOH species is evolved as the active phase for water oxidation. This study reveals a very profound earth‐abundant 3D catalyst electrode for electrochemical water splitting towards large‐scale and clean H2 evolution from water.
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