Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.13087/1104
Title: Mesoporous Thin-Film NiS2 as an Idealized Pre-Electrocatalyst for a Hydrogen Evolution Reaction
Authors: Karakaya, Cüneyt
Solati, Navid
Savacı, Umut
Kele, Emre
Turan, Servet
Çelebi, Serdar
Kaya, Sarp
Keywords: NiS2
HER
mesoporous thin films
water splitting
stability
Issue Date: 2020
Publisher: Amer Chemical Soc
Abstract: Developing active, durable, and inexpensive electrocatalysts is critical for hydrogen production to meet ever-growing sustainable energy needs. Nickel sulfides offer significant potential as electrocatalysts for a hydrogen evolution reaction (HER); however, the active phase governing the electrochemical conversion is still under debate. We show that mesoporous thin-film NiS2 synthesized by a novel soft-templating method without post-sulfurization exhibits superior HER activity in alkaline media after a preconditioning step that results in sulfur leaching, amorphization of the surface, and collapse of the mesoporous structure. A comparative analysis with crystalline NiS2 reveals that partial hydroxylation of the under-coordinated Ni sites is responsible for the superior HER activity.
URI: https://doi.org/10.1021/acscatal.0c03094
https://hdl.handle.net/20.500.13087/1104
ISSN: 2155-5435
Appears in Collections:Elektrik-Elektronik Mühendisliği Bölümü Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu
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