CO2RR Catalyst System Without Transition Metals

Recently, some researchers proposed a CO2RR catalyst system without transition metals. The system uses a benzimidazole-based organic hydride catalyst for the CO2RR process under visible light conditions, and uses carbazole-based compounds as photosensitizers to regenerate the benzimidazole. The system has a turnover number (TON) of over 8000 and does not produce other reduction products such as H2, CO or oxalate.