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Au/NiCo 2 O 4 Arrays with High Activity for Water Oxidation
Author(s) -
Liu Xijun,
Liu Junfeng,
Li Yaping,
Li Yingjie,
Sun Xiaoming
Publication year - 2014
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201402217
Subject(s) - tafel equation , oxygen evolution , water splitting , electrolysis of water , nanorod , hydrothermal circulation , electrolysis , anode , materials science , electrochemistry , chemical engineering , electrocatalyst , electrode , chemistry , inorganic chemistry , nanotechnology , catalysis , electrolyte , photocatalysis , engineering , biochemistry
The oxygen evolution reaction (OER) is a critical step in water splitting to produce hydrogen. In this report, Au/NiCo 2 O 4 nanorod arrays with high activity for OER have been fabricated by a facile hydrothermal method followed by a reduction process. The Au/NiCo 2 O 4 nanoarrays exhibited OER activity that was almost four times higher than that of Ir/C (at 1.75 V vs. RHE), and a small Tafel slope (63 mV decade −1 ). Moreover, this Au/NiCo 2 O 4 hybrid‐array electrode showed good stability in alkaline solution, which is required of an active anode for water electrolysis.