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 (100824)

Photosensitizer

Ru(bpy)3Cl2 (100787)

Investigation

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

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...