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Beilstein J. Nanotechnol. 2021, 12, 1173–1186, doi:10.3762/bjnano.12.87
Figure 1: SEM images of (a–c) fibres without cobalt additives and (d–f) fibres with 1.0 wt % Co.
Figure 2: EDX mapping results of a fibre mat containing cobalt, after carbonisation at (a–d) 700 °C and (e–h)...
Figure 3: XRD diffractograms of fibres with (a) 1.0 wt % Co and (b) without additives, carbonised at the indi...
Figure 4: (a–c) Selected Co 2p XPS spectra of samples containing cobalt carbonised at the indicated temperatu...
Figure 5: Raman spectra normalised to the height of the D peak for samples with (a) 1.0 wt % Co and (b) witho...
Figure 6: (a) Exemplary XPS C 1s range of a sample containing cobalt carbonised at 900 °C, (b) relative area ...
Figure 7: (a) Calculated ratio of molar fractions of nitrogen and carbon and (b) pyridinic nitrogen and the p...
Figure 8: Linear sweep voltammetry measurements of fibre-based electrodes using fibres carbonised at the indi...
Figure 9: (a) EOCP values from LSV measurements. (b) Current density at a given overpotential of 100 mV vs EO...
Figure 10: Potential during chronopotentiometry applying constant current densities of 2, 4, 6, and 2 mA·cm−2 ...