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Graphdiyne‐Supported NiCo 2 S 4 Nanowires: A Highly Active and Stable 3D Bifunctional Electrode Material
Author(s) -
Xue Yurui,
Zuo Zicheng,
Li Yongjun,
Liu Huibiao,
Li Yuliang
Publication year - 2017
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201700936
Subject(s) - bifunctional , electrocatalyst , oxygen evolution , water splitting , electrolysis , materials science , catalysis , chemical engineering , alkaline water electrolysis , electrolysis of water , electrode , nanowire , nanotechnology , bifunctional catalyst , inorganic chemistry , chemistry , electrochemistry , organic chemistry , electrolyte , photocatalysis , engineering
The oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting are major energy and chemical conversion efforts. Progress in electrocatalytic reactions have shown that the future is limitless in many fields. However, it is urgent to develop efficient electrocatalysts. Here, the first graphdiyne‐supported efficient and bifunctional electrocatalyst is reported using 3D graphdiyne foam as scaffolds, and NiCo 2 S 4 nanowires as building blocks (NiCo 2 S 4 NW/GDF). NiCo 2 S 4 NW/GDF exhibits outstanding catalytic activity and stability toward both OER and HER, as well as overall water splitting in alkaline media. Remarkably, it enables a high‐performance alkaline water electrolyzer with 10 and 20 mA cm −2 at very low cell voltages of 1.53 and 1.56 V, respectively, and remarkable stability over 140 h of continuous electrolysis operation at 20 mA cm −2 . The results indicate that this catalyst has a bifunction that overcomes all reported bifunctional, nonprecious‐metal‐based ones.