Synergetic modulation of the electronic structure and hydrophilicity of nickel-iron hydroxide for efficient oxygen evolution by UV/ozone treatment

In this work, a new surface engineering technique through UV/ozone treatment to improve the oxygen evolution reaction performance of nickel-iron hydroxide based catalysts has been developed. It is found that UV/ozone treatment can significantly improve the hydrophilicity of the catalysts as well as...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2020-07, Vol.8 (27), p.13437-13442
Main Authors: Pan, Ying, Wu, Yanfang, Hsain, H. Alex, Su, Ran, Cazorla, Claudio, Chu, Dewei
Format: Article
Language:English
Subjects:
Catalysts
Charge transfer
Design modifications
Electrocatalysts
Electronic structure
Hydrophilicity
Iron
Nickel
Nickel iron
Oxygen
Oxygen evolution reactions
Ozonation
Ozone
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Summary:In this work, a new surface engineering technique through UV/ozone treatment to improve the oxygen evolution reaction performance of nickel-iron hydroxide based catalysts has been developed. It is found that UV/ozone treatment can significantly improve the hydrophilicity of the catalysts as well as modify the electronic structure at the Ni-Fe center and oxidize Ni 2+ to Ni 3+ , which consequently enables better electrode-electrolyte contacts, stronger charge-transfer and more numbers of active sites with higher intrinsic activity during the OER. This work demonstrates UV/ozone treatment as a highly effective strategy towards the rational design of high-performance electrocatalysts by exploiting surface modifications. Enhanced OER performance of Ni(Fe) hydroxide through UV/ozone treatment.
ISSN:2050-7488
2050-7496
DOI:10.1039/d0ta03470c