Fig. 4
From: Atomically dispersed hybrid nickel-iridium sites for photoelectrocatalysis
Charge transfer and activity enhancement. a, b Cyclic voltammetry at 50 mV s−1 and c, d linear sweep voltammetry at 10 mV s−1 on pristine hematite and H-NiOx in 1.0 M NaOH in the dark. The concentration of Ir-anion is 1.0 µM
