Electrolytic catalytic activities towards the reduction of IO3− in aqueous KCl (pH = 1); scan rate 0.01 V s−1

7A 1 Naturally occurring/Native GCE in 0.05 M KIO3 (KCl/HCl)

 2 GCE modified with KxFey[Ir(CN)6]z in KCl/HCl

 3 GCE modified with KxFey[Ir(CN)6]z in 0.05 M KIO3

7B 2 GCE modified with Kx −1RhyFe[Ir(CN)6]z in KCl/HCl

 3 GCE modified with Kx − 1RhyFe[Ir(CN)6]z in 0.5 M KIO3