Issue 8, 2018

Construction of orderly hierarchical FeOOH/NiFe layered double hydroxides supported on cobaltous carbonate hydroxide nanowire arrays for a highly efficient oxygen evolution reaction

Abstract

An orderly hierarchical hybrid electrode has been constructed for the oxygen evolution reaction (OER) in this work. FeOOH/NiFe layered double hydroxide (LDH) nanoplates are grown on cobaltous carbonate hydroxide nanowire arrays (CCH NAs) directly, with nickel foam (NF) as a conductive substrate. This FeOOH/NiFe LDHs@CCH NAs-NF with orderly hierarchical construction of FeOOH/NiFe LDH nanoplates supported on cobaltous carbonate hydroxide nanowire arrays exhibits superior activity for the OER, which delivers current densities of 10 and 100 mA cm−2 at overpotentials of 220 and 290 mV, respectively, and excellent stability at 10, 100, 300, and 500 mA cm−2 for 40 hours in 1 M KOH. For commercial applications, an alkaline polymer electrolyte water electrolyzer (APEWE) with this electrode shows 1.768 V at 500 mA cm−2, exhibiting higher working current density than typical commercial alkaline water electrolyzers. A chronopotentiometry test in 1 M KOH at 500 mA cm−2 reveals that the performance of the APEWE is stable at ∼1.8 V for about 100 hours.

Graphical abstract: Construction of orderly hierarchical FeOOH/NiFe layered double hydroxides supported on cobaltous carbonate hydroxide nanowire arrays for a highly efficient oxygen evolution reaction

Supplementary files

Article information

Article type
Communication
Submitted
07 Dec 2017
Accepted
01 Feb 2018
First published
01 Feb 2018

J. Mater. Chem. A, 2018,6, 3397-3401

Construction of orderly hierarchical FeOOH/NiFe layered double hydroxides supported on cobaltous carbonate hydroxide nanowire arrays for a highly efficient oxygen evolution reaction

J. Chi, H. Yu, G. Jiang, J. Jia, B. Qin, B. Yi and Z. Shao, J. Mater. Chem. A, 2018, 6, 3397 DOI: 10.1039/C7TA10747A

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