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Adjusting the catalytic properties of cobalt ferrite nanoparticles by pulsed laser fragmentation in water with defined energy dose

Overview of attention for article published in Scientific Reports, October 2017
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Title
Adjusting the catalytic properties of cobalt ferrite nanoparticles by pulsed laser fragmentation in water with defined energy dose
Published in
Scientific Reports, October 2017
DOI 10.1038/s41598-017-13333-z
Pubmed ID
Authors

Friedrich Waag, Bilal Gökce, Chakrapani Kalapu, Georg Bendt, Soma Salamon, Joachim Landers, Ulrich Hagemann, Markus Heidelmann, Stephan Schulz, Heiko Wende, Nils Hartmann, Malte Behrens, Stephan Barcikowski

Abstract

Highly active, structurally disordered CoFe2O4/CoO electrocatalysts are synthesized by pulsed laser fragmentation in liquid (PLFL) of a commercial CoFe2O4 powder dispersed in water. A partial transformation of the CoFe2O4 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 CoFe2O4. 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.

Twitter Demographics

The data shown below were collected from the profiles of 2 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 23 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 23 100%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 4 17%
Student > Master 4 17%
Professor > Associate Professor 3 13%
Researcher 3 13%
Student > Bachelor 2 9%
Other 3 13%
Unknown 4 17%
Readers by discipline Count As %
Engineering 5 22%
Materials Science 4 17%
Chemistry 4 17%
Physics and Astronomy 2 9%
Energy 1 4%
Other 3 13%
Unknown 4 17%

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 15 October 2017.
All research outputs
#9,773,820
of 12,231,884 outputs
Outputs from Scientific Reports
#39,120
of 54,835 outputs
Outputs of similar age
#200,683
of 275,330 outputs
Outputs of similar age from Scientific Reports
#2,303
of 3,387 outputs
Altmetric has tracked 12,231,884 research outputs across all sources so far. This one is in the 11th percentile – i.e., 11% of other outputs scored the same or lower than it.
So far Altmetric has tracked 54,835 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 15.3. This one is in the 17th percentile – i.e., 17% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 275,330 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 15th percentile – i.e., 15% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 3,387 others from the same source and published within six weeks on either side of this one. This one is in the 21st percentile – i.e., 21% of its contemporaries scored the same or lower than it.