Fig. 4. (a) Analysis of CO₂ reduction products following excitation of NiO|-RuCP₂²⁺-Re(i) with 100 mW cm^–2 white light source with a bias of –0.24 V vs. NHE in CO₂ saturated 0.1 M LiClO₄ acetonitrile. (b) Photoelectrochemical CO₂ reduction products for same materials as a function of applied bias.