Extraction of nickel from NiFe-LDH into Ni₂P@NiFe hydroxide as a bifunctional electrocatalyst for efficient overall water splitting.

ABSTRACT: The development of highly efficient, low-cost and stable electrocatalysts for overall water splitting is highly desirable for the storage of intermittent solar energy and wind energy sources. Herein, we show for the first time that nickel can be extracted from NiFe-layered double hydroxide (NiFe-LDH) to generate an Ni₂P@FePO _x heterostructure. The Ni₂P@FePO _x heterostructure was converted to an Ni₂P@NiFe hydroxide heterostructure (P-NiFe) during water splitting, which displays high electrocatalytic performance for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in 1.0 M KOH solution, with an overpotential of 75 mV at 10 mA cm^-2 for HER, and overpotentials of 205, 230 and 430 mV at

SUBMITTER: Zhang FS 

PROVIDER: S-EPMC5885978 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature