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1 article(s) from Kungl, Hans

The effect of cobalt on morphology, structure, and ORR activity of electrospun carbon fibre mats in aqueous alkaline environments

Markus Gehring,
Tobias Kutsch,
Osmane Camara,
Alexandre Merlen,
Hermann Tempel,
Hans Kungl and
Rüdiger-A. Eichel

Beilstein J. Nanotechnol. 2021, 12, 1173–1186, doi:10.3762/bjnano.12.87

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Figure 1: SEM images of (a–c) fibres without cobalt additives and (d–f) fibres with 1.0 wt % Co.

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Figure 2: EDX mapping results of a fibre mat containing cobalt, after carbonisation at (a–d) 700 °C and (e–h)...

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Figure 3: XRD diffractograms of fibres with (a) 1.0 wt % Co and (b) without additives, carbonised at the indi...

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Figure 4: (a–c) Selected Co 2p XPS spectra of samples containing cobalt carbonised at the indicated temperatu...

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Figure 5: Raman spectra normalised to the height of the D peak for samples with (a) 1.0 wt % Co and (b) witho...

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Figure 6: (a) Exemplary XPS C 1s range of a sample containing cobalt carbonised at 900 °C, (b) relative area ...

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Figure 7: (a) Calculated ratio of molar fractions of nitrogen and carbon and (b) pyridinic nitrogen and the p...

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Figure 8: Linear sweep voltammetry measurements of fibre-based electrodes using fibres carbonised at the indi...

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Figure 9: (a) E_OCP values from LSV measurements. (b) Current density at a given overpotential of 100 mV vs E_O...

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Figure 10: Potential during chronopotentiometry applying constant current densities of 2, 4, 6, and 2 mA·cm⁻² ...

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Published 19 Oct 2021

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