International Journal of Hydrogen Energy, volume 45, issue 28, pages 14199-14207
Porous flower-like nickel nitride as highly efficient bifunctional electrocatalysts for less energy-intensive hydrogen evolution and urea oxidation
Zhiju Zhao
1, 2
,
Jun Zhao
1
,
Huibin Wang
3
,
Xuelong Li
3
,
Liqin Yang
1
,
Ziwei Zhao
1
,
Xueying Liu
1
,
Yizhuo Liu
1
,
Peng Liu
4
,
Zhenyu Cai
3
1
2
Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
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Publication type: Journal Article
Publication date: 2020-05-01
scimago Q1
SJR: 1.513
CiteScore: 13.5
Impact factor: 8.1
ISSN: 03603199, 18793487
Condensed Matter Physics
Energy Engineering and Power Technology
Fuel Technology
Renewable Energy, Sustainability and the Environment
Abstract
Finding a suitable replacement for the high potential of anodic water electrolysis (oxygen evolution reaction (OER)) is significant for hydrogen energy storage and conversion. In this work, a simple and scalable method synthesizes a structurally unique Ni3N nanoarray on Ni foam, Ni3N-350/NF, that provides efficient electrocatalysis for the urea oxidation reaction (UOR) that transports 10 mA cm−2 at a low potential of 1.34 V. In addition, Ni3N-350/NF exhibits electro-defense electrocatalytic performance for hydrogen evolution reaction, which provides a low overpotential of 128 mV at 10 mA cm−2. As proof of concept, all-water-urea electrolysis measurement is carried out in 1 M KOH with 0.5 M Urea with Ni3N-350/NF as cathode and anode respectively. Ni3N-350/NF||Ni3N-350/NF electrode can provide 100 mA cm−2 at a voltage of only 1.51 V, 160 mV less than that of water electrolysis, which proves its commercial viability in energy-saving hydrogen production.
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