Jump to main content
Jump to site search

Issue 40, 2020
Previous Article Next Article

Ultrathin and porous δ-FeOOH modified Ni3S2 3D heterostructure nanosheets with excellent alkaline overall water splitting performance

Author affiliations

Abstract

The design and synthesis of bifunctional heterostructure catalysts is significant to achieve excellent water electrolysis performance. Nevertheless, it remains a challenge to explore the exact active centers of the bifunctional catalysts in the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Herein, a bifunctional catalyst of ultra-thin porous δ-FeOOH modified Ni3S2 nanosheets exhibits a relatively low overpotential of 187 mV for the OER and 106 mV for the HER at a current density of 10 mA cm−2, respectively. In addition, the overall water splitting unit provides a potential of 1.525 V at 10 mA cm−2 and maintains a performance of 96.85% after 24 h continuous testing. Multispectral analysis and density functional theory (DFT) calculations disclose that the constructed interface between δ-FeOOH and Ni3S2 has two functional groups of Ni–O–Fe and Fe–S bonds to boost the OER and HER performance, respectively, thereby accelerating the overall electrochemical water splitting process in alkaline solution.

Graphical abstract: Ultrathin and porous δ-FeOOH modified Ni3S2 3D heterostructure nanosheets with excellent alkaline overall water splitting performance

Back to tab navigation

Supplementary files

Article information


Submitted
05 Aug 2020
Accepted
23 Sep 2020
First published
23 Sep 2020

J. Mater. Chem. A, 2020,8, 21199-21207
Article type
Paper

Ultrathin and porous δ-FeOOH modified Ni3S2 3D heterostructure nanosheets with excellent alkaline overall water splitting performance

X. Ji, C. Cheng, Z. Zang, L. Li, X. Li, Y. Cheng, X. Yang, X. Yu, Z. Lu, X. Zhang and H. Liu, J. Mater. Chem. A, 2020, 8, 21199
DOI: 10.1039/D0TA07676G

Social activity

Search articles by author

Spotlight

Advertisements