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Photoreduction of CO2. Time profiles of photocatalytic CO (star) and H2 (circle) formation using 0.5 mM PS and 50 μM CoTCPc (red) under 425 nm of irradiation (20 mW cm–2). Trace colors: CuBCP, blue; CuPBCP, red; CuPPBCP, gold; IrBPY, green. The error bars represent the standard deviations of three independent measurements.
