Fig. 5: pH dependency, KIEs and redox state investigations of Aza-CMP-Co catalysts. | Nature Catalysis

Fig. 5: pH dependency, KIEs and redox state investigations of Aza-CMP-Co catalysts.

From: Intramolecular hydroxyl nucleophilic attack pathway by a polymeric water oxidation catalyst with single cobalt sites

Fig. 5

a,b, CV and DPV curves of Aza-CMP-Co under different pH conditions (unbuffered NaOH solutions) (a) and corresponding Pourbaix diagram (scan rate, 50 mV s−1, without iR compensation) (b). c, pH-dependent OER activity (potential determined at 2.0 mA cm−2). d, LSV curves of Aza-CMP-Co in 1.0 M NaOD/D2O and NaOH/H2O solutions (scan rate, 5 mV s−1); inset: KIE against potential. e,f, CV curves of Aza-CMP-Co under different pH conditions (borate buffered solutions) (e) and corresponding Pourbaix diagram (scan rate, 50 mV s−1, without iR compensation) (f). g, pH-dependent OER activity (potential determined at 2.0 mA cm−2 in NaBi buffer). h, LSV curves of Aza-CMP-Co in 0.1 M NaBi/D2O and NaBi/H2O solutions (scan rate, 5 mV s−1); inset, KIE against overpotential. i, CV curves of Aza-CMP-Co and Aza-CMP on CP in dry acetonitrile (scan rate, 50 mV s−1). j, CV curves of Aza-CMP-Co following addition of water and NaOH to the non-aqueous electrolyte. k, DPV curves of Aza-CMP-Co in acetonitrile and water/NaOH with acetonitrile electrolytes added. l, CV calculated for Aza-CMP-Co (1.0 M NaOH; scan rate, 50 mV s−1).

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