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A Janus Nickel Cobalt Phosphide Catalyst for High‐Efficiency Neutral‐pH Water Splitting
Author(s) -
Wu Rui,
Xiao Bing,
Gao Qiang,
Zheng YaRong,
Zheng XuSheng,
Zhu JunFa,
Gao MinRui,
Yu ShuHong
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201808929
Subject(s) - water splitting , phosphide , catalysis , nickel , cobalt , ternary operation , inorganic chemistry , transition metal , electrolyte , electrolysis of water , electrochemistry , electrolysis , materials science , chemical engineering , electrocatalyst , chemistry , electrode , metallurgy , biochemistry , photocatalysis , computer science , engineering , programming language
Transition‐metal phosphides have stimulated great interest as catalysts to drive the hydrogen evolution reaction (HER), but their use as bifunctional catalytic electrodes that enable efficient neutral‐pH water splitting has rarely been achieved. Herein, we report the synthesis of ternary Ni 0.1 Co 0.9 P porous nanosheets onto conductive carbon fiber paper that can efficiently and robustly catalyze both the HER and water oxidation in 1 m phosphate buffer (PBS; pH 7) electrolyte under ambient conditions. A water electrolysis cell comprising the Ni 0.1 Co 0.9 P electrodes demonstrates remarkable activity and stability for the electrochemical splitting of neutral‐pH water. We attribute this performance to the new ternary Ni 0.1 Co 0.9 P structure with porous surfaces and favorable electronic states resulting from the synergistic interplay between nickel and cobalt. Ternary metal phosphides hold promise as efficient and low‐cost catalysts for neutral‐pH water splitting devices.