2D FeSx Nanosheets by Atomic Layer Deposition: Electrocatalytic Properties for the Hydrogen Evolution Reaction

Zazpe Mendioroz, Raúl; Rodriguez Pereira, Jhonatan; Thalluri, Sitaramanjaneya Mouli; Hromádko, Luděk; Pavliňák, David; Kolíbalová, Eva; Kurka, Michal; Sopha, Hanna Ingrid; Macák, Jan

2D FeSx Nanosheets by Atomic Layer Deposition: Electrocatalytic Properties for the Hydrogen Evolution Reaction

Files

ChemSusChem2023Zazpe.pdf(799.98 KB)

Date

2023-06-09

Authors

Zazpe Mendioroz, Raúl

Rodriguez Pereira, Jhonatan

Thalluri, Sitaramanjaneya Mouli

Hromádko, Luděk

Pavliňák, David

Kolíbalová, Eva

Kurka, Michal

Sopha, Hanna Ingrid

Macák, Jan

ORCID

0000-0001-9669-7946

0000-0002-8548-8185

0000-0001-7091-3022

Publisher

Wiley-VCH

Altmetrics

Abstract

2-dimensional FeSx nanosheets of different sizes are synthesized by applying different numbers of atomic layer deposition (ALD) cycles on TiO2 nanotube layers and graphite sheets as supporting materials and used as an electrocatalyst for the hydrogen evolution reaction (HER). The electrochemical results confirm electrocatalytic activity in alkaline media with outstanding long-term stability (>65 h) and enhanced catalytic activity, reflected by a notable drop in the initial HER overpotential value (up to 26 %). By using a range of characterization techniques, the origin of the enhanced catalytic activity was found to be caused by the synergistic interplay between in situ morphological and compositional changes in the 2D FeSx nanosheets during HER. Under the application of a cathodic potential in alkaline media, the as-synthesized 2D FeSx nanosheets transformed into iron oxyhydroxide-iron oxysulfide core-shell nanoparticles, which exhibited a higher active catalytic surface and newly created Fe-based HER catalytic sites.

Keywords

atomic layer deposition, electrocatalysis, hydrogen evolution reaction, iron sulfide, thin films

Citation

ChemSusChem. 2023, vol. 16, issue 11, p. 1-10.
https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/cssc.202300115

Document type

Peer-reviewed

Document version

Published version

Language of document

en

Document licence

Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/