Issue 4, 2022

Anchoring stable FeS2 nanoparticles on MXene nanosheets via interface engineering for efficient water splitting

Abstract

Exploring highly efficient, economical and environment friendly electrocatalysts for the hydrogen and oxygen evolution reactions (HER and OER) is necessary but challenging for economical water splitting. Herein, FeS2 nanoparticles were anchored on the surface of MXene through a simple adsorption-growth route (FeS2@MXene). By virtue of the large active surface area of FeS2 and its robust interfacial interaction with conductive and hydrophilic MXene nanosheets, the obtained FeS2@MXene composite can accelerate the transfer of mass/charge and facilitate contact between water molecules and reactive sites of FeS2. Specifically, MXene as a support material can not only alter the electrophilicity of the active centers of FeS2 through modulating the electron density but also prevent the aggregation of FeS2, thereby promoting activity and stability. The optimized FeS2@MXene delivers a 10 mA cm−2 current density at overpotentials of 87 and 240 mV in alkaline solution for the HER and OER, respectively, which is comparable with reported transition metal sulfide (TMS) based catalysts. More importantly, in situ Raman spectroscopy reveals that the FeOOH generated during the OER process as a actual active species enhances the intrinsic activity of the catalyst. This work paves a new way for the interface engineering of TMS-based electrocatalysts towards water splitting.

Graphical abstract: Anchoring stable FeS2 nanoparticles on MXene nanosheets via interface engineering for efficient water splitting

Supplementary files

Article information

Article type
Research Article
Submitted
22 Nov 2021
Accepted
31 Dez 2021
First published
31 Dez 2021

Inorg. Chem. Front., 2022,9, 662-669

Anchoring stable FeS2 nanoparticles on MXene nanosheets via interface engineering for efficient water splitting

Y. Xie, H. Yu, L. Deng, R. S. Amin, D. Yu, A. E. Fetohi, M. Yu. Maximov, L. Li, K. M. El-Khatib and S. Peng, Inorg. Chem. Front., 2022, 9, 662 DOI: 10.1039/D1QI01465J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements