Premium
Binary FeCo Oxyhydroxide Nanosheets as Highly Efficient Bifunctional Electrocatalysts for Overall Water Splitting
Author(s) -
Nguyen TrangThi Hong,
Lee Jooyoung,
Bae Joonwon,
Lim Byungkwon
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201800022
Subject(s) - bifunctional , nanosheet , oxygen evolution , water splitting , materials science , electrochemistry , chemical engineering , catalysis , electrolyte , electrocatalyst , bifunctional catalyst , electrolysis , inorganic chemistry , alkaline water electrolysis , electrode , nanotechnology , chemistry , organic chemistry , photocatalysis , engineering
Bifunctional catalysts that are highly active toward both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are attractive for efficient electrochemical water splitting. Herein, we report a bifunctional FeCoOOH nanosheet catalyst for highly efficient electrochemical water splitting in an alkaline electrolyte. The FeCoOOH nanosheet arrays were grown directly on the surface of a porous Ni foam by using a simple hydrothermal method. Because of their binary oxyhydroxide structure and high electrical conductivity intrinsic to direct growth, these FeCoOOH nanosheets exhibited excellent activities toward both the HER and OER. With the use of this bifunctional FeCoOOH catalyst, an alkaline water electrolyzer in a two‐electrode configuration achieved 10 mA cm −2 only at a cell voltage of 1.62 V without iR compensation in 1 m KOH, which outperformed that based on the combination of commercial IrO 2 and Pt/C catalysts.