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Cited by 93Electrocatalysts for Energy ConversionLaser-Ablation Synthesis of NanoparticlesCO2 Reduction Techniques and Catalysts

Laser Fragmentation‐Induced Defect‐Rich Cobalt Oxide Nanoparticles for Electrochemical Oxygen Evolution Reaction

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Yu, Mingquan, Waag, Friedrich, Chan, Candace K., Weidenthaler, Claudia, Barcikowski, Stephan, Tüysüz, Harun·2020·ChemSusChem
DOI 10.1002/cssc.201903186PMC PMC7028056
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Abstract

Sub‐5 nm cobalt oxide nanoparticles are produced in a flowing water system by pulsed laser fragmentation in liquid (PLFL). Particle fragmentation from 8 nm to 4 nm occurs and is attributed to the oxidation process in water where oxidative species are present and the local temperature is rapidly elevated under laser irradiation. Significantly higher surface area, crystal phase transformation, and formation of structural defects (Co 2+ defects and oxygen vacancies) through the PLFL process are evidenced by detailed structural characterizations by nitrogen physisorption, electron microscopy, synchrotron X‐ray diffraction, and X‐ray photoelectron spectroscopy. When employed as electrocatalysts for the oxygen evolution reaction under alkaline conditions, the fragmented cobalt oxides exhibit superior catalytic activity over pristine and nanocast cobalt oxides, delivering a current density of 10 mA cm−2 at 369 mV and a Tafel slope of 46 mV dec−1, which is attributed to a larger exposed active surface area, the formation of defects, and an increased charge transfer rate. The study provides an effective approach to engineering cobalt oxide nanostructures in a flowing water system, which shows great potential for sustainable production of active cobalt catalysts.

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  • CoO exhibited high OER activity in alkaline media with a current density of 10 mA cm−2 at 369 mV and a Tafel slope of 46 mV dec−1, ascribed to large surface area, defects, and improved charge transfer rate.

    “The CoO exhibited high OER activity in alkaline media with a current density of 10 mA cm−2 at 369 mV and a Tafel slope of 46 mV dec−1 ascribed to the large surface area, defects, and improved charge transfer rate.”

    From Fundamentals and comprehensive insights on pulsed laser synthesis of advanced materials for diverse photo- and electrocatalytic applications (2022) · cites this paper as [220]

    The Results and Discussion distinguish untreated CoO from laser-fragmented CoO-L. They assign the 369 mV overpotential at 10 mA cm−2 and 46 mV dec−1 Tafel slope to CoO-L, not CoO; untreated CoO required 403 mV. The passages on surface area and charge transfer likewise describe advantages of CoO-L over CoO. (LLM, conf=0.89)

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Cited by

Sorted by citations

Authors
Yu, M., Waag, F., Chan, C. K., Weidenthaler, C., Barcikowski, S., & Tüysüz, H.
Affiliations
  • Max-Planck-Institut für Kohlenforschung (DE)
  • University of Duisburg-Essen (DE)
Corresponding author
Tüysüz, Harun
ORCID
Venue
ChemSusChem
Publisher
Wiley
Published
2019-12-30
Volume
13
Issue
3
Pages
520-528
ISSN
  • 1864-5631 (ISSN-L)
  • 1864-564X
DOI
10.1002/cssc.201903186
PMC
PMC7028056
OpenAlex
W2989892622
Cited by
93
References
3
Citations by year
2026: 17 · 2025: 14 · 2024: 10 · 2023: 5 · 2022: 16 · 2021: 18 · 2020: 12 · 2019: 1
FWCI
2.50
Type
journal article
Language
en
Open access
Licence
Locations
  • ChemSusChem (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Funders
  • Deutsche Forschungsgemeinschaft (SFB/TRR 247, TRR247, 388390466)
  • International Max Planck Research School for Advanced Methods in Process and Systems Engineering
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Engineering › Biomedical Engineering › Laser-Ablation Synthesis of Nanoparticles
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
Keywords
cobalt oxide nanoparticles, oxygen evolution reaction, electrocatalysts, oxygen vacancies, crystal transformation, surface area, alkaline water electrolysis, charge transfer, nanocasting

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