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Solar light driven atomic and electronic transformations in a plasmonic Ni@NiO/NiCO3 photocatalyst revealed by ambient pressure X-ray photoelectron spectroscopy

Ghosalya, Manoj Kumar ; Talebi, Parisa ; Singh, Harishchandra ; Klyushin, Alexander LU ; Kokkonen, Esko LU orcid ; Alaoui Mansouri, Mohammed ; Huttula, Marko ; Cao, Wei and Urpelainen, Samuli LU (2024) In Catalysis Science and Technology 14(11). p.3029-3040
Abstract

This work employs ambient pressure X-ray photoelectron spectroscopy (APXPS) to delve into the atomic and electronic transformations of a core-shell Ni@NiO/NiCO3 photocatalyst - a model system for visible light active plasmonic photocatalysts used in water splitting for hydrogen production. This catalyst exhibits reversible structural and electronic changes in response to water vapor and solar simulator light. In this study, APXPS spectra were obtained under a 1 millibar water vapor pressure, employing a solar simulator with an AM 1.5 filter to measure spectral data under visible light illumination. The in situ APXPS spectra indicate that the metallic Ni core absorbs the light, exciting plasmons, and creates hot electrons that... (More)

This work employs ambient pressure X-ray photoelectron spectroscopy (APXPS) to delve into the atomic and electronic transformations of a core-shell Ni@NiO/NiCO3 photocatalyst - a model system for visible light active plasmonic photocatalysts used in water splitting for hydrogen production. This catalyst exhibits reversible structural and electronic changes in response to water vapor and solar simulator light. In this study, APXPS spectra were obtained under a 1 millibar water vapor pressure, employing a solar simulator with an AM 1.5 filter to measure spectral data under visible light illumination. The in situ APXPS spectra indicate that the metallic Ni core absorbs the light, exciting plasmons, and creates hot electrons that are subsequently utilized through hot electron injection in the hydrogen evolution reaction (HER) by NiCO3. Additionally, the data show that NiO undergoes reversible oxidation to NiOOH in the presence of water vapor and light. The present work also investigates the contribution of carbonate and its involvement in the photocatalytic reaction mechanism, shedding light on this seldom-explored aspect of photocatalysis. The APXPS results highlight the photochemical reduction of carbonates into -COOH, contributing to the deactivation of the photocatalyst. This work demonstrates the APXPS efficacy in examining photochemical reactions, charge transfer dynamics and intermediates in potential photocatalysts under near realistic conditions.

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author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Catalysis Science and Technology
volume
14
issue
11
pages
12 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85193284657
  • pmid:38841155
ISSN
2044-4753
DOI
10.1039/d4cy00204k
language
English
LU publication?
yes
id
097a68d8-d15a-4bb9-883b-4de601da6832
date added to LUP
2024-06-17 15:00:16
date last changed
2024-06-18 03:00:03
@article{097a68d8-d15a-4bb9-883b-4de601da6832,
  abstract     = {{<p>This work employs ambient pressure X-ray photoelectron spectroscopy (APXPS) to delve into the atomic and electronic transformations of a core-shell Ni@NiO/NiCO<sub>3</sub> photocatalyst - a model system for visible light active plasmonic photocatalysts used in water splitting for hydrogen production. This catalyst exhibits reversible structural and electronic changes in response to water vapor and solar simulator light. In this study, APXPS spectra were obtained under a 1 millibar water vapor pressure, employing a solar simulator with an AM 1.5 filter to measure spectral data under visible light illumination. The in situ APXPS spectra indicate that the metallic Ni core absorbs the light, exciting plasmons, and creates hot electrons that are subsequently utilized through hot electron injection in the hydrogen evolution reaction (HER) by NiCO<sub>3</sub>. Additionally, the data show that NiO undergoes reversible oxidation to NiOOH in the presence of water vapor and light. The present work also investigates the contribution of carbonate and its involvement in the photocatalytic reaction mechanism, shedding light on this seldom-explored aspect of photocatalysis. The APXPS results highlight the photochemical reduction of carbonates into -COOH, contributing to the deactivation of the photocatalyst. This work demonstrates the APXPS efficacy in examining photochemical reactions, charge transfer dynamics and intermediates in potential photocatalysts under near realistic conditions.</p>}},
  author       = {{Ghosalya, Manoj Kumar and Talebi, Parisa and Singh, Harishchandra and Klyushin, Alexander and Kokkonen, Esko and Alaoui Mansouri, Mohammed and Huttula, Marko and Cao, Wei and Urpelainen, Samuli}},
  issn         = {{2044-4753}},
  language     = {{eng}},
  number       = {{11}},
  pages        = {{3029--3040}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Catalysis Science and Technology}},
  title        = {{Solar light driven atomic and electronic transformations in a plasmonic Ni@NiO/NiCO<sub>3</sub> photocatalyst revealed by ambient pressure X-ray photoelectron spectroscopy}},
  url          = {{http://dx.doi.org/10.1039/d4cy00204k}},
  doi          = {{10.1039/d4cy00204k}},
  volume       = {{14}},
  year         = {{2024}},
}