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  Impact of Single-Pulse, Low-Intensity Laser Post-Processing on Structure and Activity of Mesostructured Cobalt Oxide for the Oxygen Evolution Reaction

Budiyanto, E., Zerebecki, S., Weidenthaler, C., Kox, T., Kenmoe, S., Spohr, E., et al. (2021). Impact of Single-Pulse, Low-Intensity Laser Post-Processing on Structure and Activity of Mesostructured Cobalt Oxide for the Oxygen Evolution Reaction. ACS Applied Materials and Interfaces, 13(44), 51962-51973. doi:10.1021/acsami.1c08034.

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 Creators:
Budiyanto, Eko1, Author              
Zerebecki, Swen2, Author
Weidenthaler, Claudia3, Author              
Kox, Tim4, Author
Kenmoe, Stephane4, Author
Spohr, Eckhard4, Author
DeBeer, Serena5, Author              
Rüdiger, Olaf5, Author              
Reichenberger, Sven2, Author
Barcikowski, Stephan2, Author
Tüysüz, Harun1, Author              
Affiliations:
1Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950290              
2Technical Chemistry I and Center of Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätsstraße 7, Essen, North Rhine-Westphalia 45141, Germany, ou_persistent22              
3Research Group Weidenthaler, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950291              
4Department of Theoretical Chemistry, University of Duisburg-Essen, Universitätsstraße 2, Essen, North Rhine-Westphalia 45141, Germany, ou_persistent22              
5Research Department DeBeer, Max Planck Institute for Chemical Energy Conversion, Max Planck Society, ou_3023871              

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Free keywords: reactive laser processing; defect engineering; oxygen evolution reaction; cobalt oxide; electrocatalyst; X-ray spectroscopy
 Abstract: Herein, we report nanosecond, single-pulse laser post-processing (PLPP) in a liquid flat jet with precise control of the applied laser intensity to tune structure, defect sites, and the oxygen evolution reaction (OER) activity of mesostructured Co3O4. High-resolution X-ray diffraction (XRD), Raman, and X-ray photoelectron spectroscopy (XPS) are consistent with the formation of cobalt vacancies at tetrahedral sites and an increase in the lattice parameter of Co3O4 after the laser treatment. X-ray absorption spectroscopy (XAS) and X-ray emission spectroscopy (XES) further reveal increased disorder in the structure and a slight decrease in the average oxidation state of the cobalt oxide. Molecular dynamics simulation confirms the surface restructuring upon laser post-treatment on Co3O4. Importantly, the defect-induced PLPP was shown to lower the charge transfer resistance and boost the oxygen evolution activity of Co3O4. For the optimized sample, a 2-fold increment of current density at 1.7 V vs RHE is obtained and the overpotential at 10 mA/cm2 decreases remarkably from 405 to 357 mV compared to pristine Co3O4. Post-mortem characterization reveals that the material retains its activity, morphology, and phase structure after a prolonged stability test.

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Language(s): eng - English
 Dates: 2021-04-302021-07-292021-11-10
 Publication Status: Published in print
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acsami.1c08034
 Degree: -

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Title: ACS Applied Materials and Interfaces
  Other : ACS Applied Materials & Interfaces
  Abbreviation : ACS Appl. Mater. Interfaces
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 13 (44) Sequence Number: - Start / End Page: 51962 - 51973 Identifier: ISSN: 1944-8244
CoNE: https://pure.mpg.de/cone/journals/resource/1944-8244