Photocatalytic CO2 Reduction Using a Robust Multifunctional Iridium Complex toward the Selective Formation of Formic Acid

Abstract

Summary

A photochemical reduction of CO₂ to formic acid and CO was shown using the iridium complex [Ir(mesbpy-(PCy2)2)][BPh4] as a catalyst without any additional photosensitizer. Turnover numbers (TONs) of 2080 for formic acid and a selectivity of 87% for formic acid were reached in dimethylacetamide. The experiments were conducted under visible-light irradiation (λ > 400 nm) using BIH as sacrificial electron donor (see section SEDs below).

Content of the published article in detail

The article contains results for the reduction of CO₂ to CO and formic acid under visible-light catalysis using an iridium complex. The catalytic system performs best (referring to the TON of formic acid production) in dimethylacetamide.

Catalyst

[Ir(mesbpy-(PCy2)2)][BPh4]

Investigation

1. REDIRECT Photocatalytic reduction of CO2, best TON

Investigation-Name: Table 1Export

Sacrificial Electron Donor

In this study, the experiments were done with the sacrificial electron donor BIH (BIH).

Additives

In this study, additional control experiments were conducted with Hg.