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Figure 6: (a) LSVs of different samples at 1600 rpm and (b) the corresponding Tafel plots obtained from the RDE polarization curves in 0.1 M KOH. (c) Electron transfer number of different samples obtained from the RRDE curves in 0.1 M KOH. (d) Stability test of PANI@PCN-224(Fe)-900 in 0.1 M KOH. (e) Methanol-crossover effects test of PANI@PCN-224(Fe)-900 in 0.1 M KOH. (f) LSVs of different samples at 1600 rpm and (g) the corresponding Tafel plots obtained from the RDE polarization curves in 0.1 M HClO4. (h) Stability test of PANI@PCN-224(Fe)-900 in 0.1 M HClO4. (i) LSVs of PANI@PCN-224(Fe)-900 before and after the addition of 0.1 M SCN- in 0.1 M KOH.