Adjusting the catalytic properties of cobalt ferrite nanoparticles by pulsed laser fragmentation in water with defined energy dose
Open accessAbstract
Highly active, structurally disordered CoFe 2 O 4/CoO electrocatalysts are synthesized by pulsed laser fragmentation in liquid (PLFL) of a commercial CoFe 2 O 4 powder dispersed in water. A partial transformation of the CoFe 2 O 4 educt to CoO is observed and proposed to be a thermal decomposition process induced by the picosecond pulsed laser irradiation. The overpotential in the OER in aqueous alkaline media at 10 mA cm−2 is reduced by 23% compared to the educt down to 0.32 V with a Tafel slope of 71 mV dec−1. Importantly, the catalytic activity is systematically adjustable by the number of PLFL treatment cycles. The occurrence of thermal melting and decomposition during one PLFL cycle is verified by modelling the laser beam energy distribution within the irradiated colloid volume and comparing the by single particles absorbed part to threshold energies. Thermal decomposition leads to a massive reduction in particle size and crystal transformations towards crystalline CoO and amorphous CoFe 2 O 4. Subsequently, thermal melting forms multi-phase spherical and network-like particles. Additionally, Fe-based layered double hydroxides at higher process cycle repetitions emerge as a byproduct. The results show that PLFL is a promising method that allows modification of the structural order in oxides and thus access to catalytically interesting materials.
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CoFe2O4/CoO material showed a 23% decrease in overpotential for OER in aqueous alkaline media with a Tafel slope of 71 mV dec−1.
“The CoFe2O4/CoO material showed a 23% decrease in overpotential for OER in aqueous alkaline media with a Tafel slope of 71 mV dec−1.”
From Fundamentals and comprehensive insights on pulsed laser synthesis of advanced materials for diverse photo- and electrocatalytic applications (2022) · cites this paper as [217]
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Sorted by citations
Theerthagiri, J., Karuppasamy, K., Lee, S. J., Shwetharani, R., Kim, H.-S., Pasha, S. K. K., Ashokkumar, M., & Choi, M. Y. (2022) · Light: Science & Applications · doi:10.1038/s41377-022-00904-7 · Cited by 461 · see citing works
- Authors
- Waag, F., Gökce, B., Kalapu, C., Bendt, G., Salamon, S., Landers, J., Hagemann, U., Heidelmann, M., Schulz, S., Wende, H., Hartmann, N., Behrens, M., & Barcikowski, S.
- Affiliations
- University of Duisburg-Essen (DE)
- Corresponding author
- Gökce, Bilal
- Behrens, Malte
- ORCID
- Venue
- Scientific Reports
- Published
- 2017-10-13
- Volume
- 7
- Issue
- 1
- Pages
- 13161-13161
- ISSN
- 2045-2322 (ISSN-L)
- PMC
- PMC5640596
- OpenAlex
- W2764030346
- Cited by
- 69
- References
- 1
- Citations by year
- 2026: 1 · 2025: 11 · 2024: 2 · 2023: 7 · 2022: 8 · 2021: 12 · 2020: 11 · 2019: 10 · 2018: 7
- FWCI
- 2.05
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Scientific Reports (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Universitätsbibliographie, Universität Duisburg-Essen (submittedVersion)
- DuEPublico (University of Duisburg-Essen) (submittedVersion, cc-by)
- Funders
- Mercator Research Center Ruhr (MERCUR ST-2017-0001, PR-2016-0044)
- 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 › Iron oxide chemistry and applications
- Keywords
- cobalt ferrite nanoparticles, oxygen evolution reaction, thermal decomposition, laser dose, particle size reduction, cobalt oxide, layered double hydroxides, structural disorder, alkaline water electrolysis
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