ZnSe quantum dots modified with a Ni(cyclam) catalyst for efficient visible-light driven CO₂ reduction in water.

ABSTRACT: A precious metal and Cd-free photocatalyst system for efficient CO₂ reduction in water is reported. The hybrid assembly consists of ligand-free ZnSe quantum dots (QDs) as a visible-light photosensitiser combined with a phosphonic acid-functionalised Ni(cyclam) catalyst, NiCycP. This precious metal-free photocatalyst system shows a high activity for aqueous CO₂ reduction to CO (Ni-based TON_CO > 120), whereas an anchor-free catalyst, Ni(cyclam)Cl₂, produced three times less CO. Additional ZnSe surface modification with 2-(dimethylamino)ethanethiol (MEDA) partially suppresses H₂ generation and enhances the CO production allowing for a Ni-based TON_CO of > 280 and more than 33% selectivity for CO₂ reduction over H

SUBMITTER: Kuehnel MF 

PROVIDER: S-EPMC5911736 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature