Visible-Light-Driven Photocatalytic CO2 Reduction by a Ni(II) Complex Bearing a Bioinspired Tetradentate Ligand for Selective CO Production

Abstract

Summary

A photochemical reduction of CO2 to CO was shown using the xx complex xx or the xx complex xx as catalysts in combination with the ruthenium-based photosensitizer xx. Turnover numbers (TONs) up to xx and a selectivity of xx% for CO using the cobalt catalyst were reached in xx. The experiments were conducted under visible-light irradiation (λ = xx nm) using xx as sacrificial reductants (see section SEDs below).

Content of the published article in detail

The article contains results for the reduction of CO2 to CO under visible-light catalysis using xx complexes as catalysts. The catalytic system performs best (referring to the TON of CO production) in xx using the xx complex and the xx photosensitizer.

Catalyst

[Ni(bpet)(MeCN)2][ClO4]2

Photosensitizer

Ru(bpy)3Cl2

Investigation

	cat	cat conc [µM]	PS	PS conc [mM]	e-D	e-D conc [M]	solvent A	.	.	.	λexc [nm]	.	TON CO	.	TON H2	.	.
1.	[Ni(bpet)(MeCN)2][ClO4]2	0.03	Ru(bpy)3Cl2	0.5	BIH	0.1	DMA				450		713		6.9
2.	[Ni(bpet)(MeCN)2][ClO4]2	0.03	Ru(bpy)3Cl2	0.5	BIH	0.1	DMF				450		159		11
3.	[Ni(bpet)(MeCN)2][ClO4]2	0.03	Ru(bpy)3Cl2	0.5	BIH	0.1	DMA				450		67		3.4
4.	[Ni(bpet)(MeCN)2][ClO4]2	0.03	Ru(bpy)3Cl2	0.5	BIH	0.1	MeCN				450
5.	[Ni(bpet)(MeCN)2][ClO4]2	0.03	Ru(bpy)3Cl2	0.5	TEA	0.1	DMA				450
6.	[Ni(bpet)(MeCN)2][ClO4]2	0.03	Ru(bpy)3Cl2	0.5	TEOA	0.1	DMA				450		2.6		25.5

Investigation-Name: Table 1Export

Sacrificial electron donor

In this study, the experiments were done with the sacrificial electron donors TEOA (100507), BIH (100508), and TEA (100505).

Additives

In this study, control experiments were conducted...