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A Universal Method to Engineer Porous Carbon-based Electrocatalysts from Cow Dung for Oxygen Reduction

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Figure

Figure 1.  (a) SEM images of M-CD  and (b) the carbons  prepared without the salt mixture
Figure 3. Raman spectra of M-CD and XC-72 carbon.
Figure 4. (a) XPS survey spectrum, and (b) N 1s spectrum of M-CD.
Figure 6. (a) Linear sweep voltammograms of M-CD, commercial carbon, and Pt/C for the ORR in 0.1 M KOH aqueous solution at a scan rate of 5 mV s-1 and rotation rate of 1600 rpm; (b) corrected mass transfer Tafel polarization curves of the samples derived f
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