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Bimetal composites for photocatalytic reduction of CO2 to CO in the near-infrared region by the SPR effect

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Abstract

A major challenge in the field of photocatalytic carbon dioxide (CO2) reduction is to design catalyst systems featuring high selectivity for CO production, long-term stability and a composition of Earth-abundant elements. Here, we present a metal–organic framework (MOF) based catalyst to mitigate the technical problems associated with the above-mentioned features. We report a carbon-coated CuNi alloy nanocatalyst obtained by high temperature vacuum treatment of a MOF material (CuNiBTC). The resulting carbon encapsulated CuNi (denoted as CuNi/C) nanoparticles possess a well-designed core–shell composite structure with graphene shells. Meanwhile, we investigated the reaction mechanism of CO2 on the surface of the CuNi/C photocatalyst in an aqueous solution containing triethanolamine. The experimental results show that the activity and catalytic yield of CuNi/C are much higher than those of Cu/C and Ni/C alone. At the same time, the catalytic activity of CuNi/C is also affected by changing the reaction temperature in the preparation process. As a result, the CuNi/C samples can achieve nearly 90% selectivity for NIR-light-driven CO2 reduction to CO. Our approach demonstrates the potential of non-semiconductor materials as catalysts for efficient and selective reduction of CO2 to CO.

Graphical abstract: Bimetal composites for photocatalytic reduction of CO2 to CO in the near-infrared region by the SPR effect

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Supplementary files

Article information


Submitted
31 Dec 2019
Accepted
04 Feb 2020
First published
04 Feb 2020

Dalton Trans., 2020, Advance Article
Article type
Paper

Bimetal composites for photocatalytic reduction of CO2 to CO in the near-infrared region by the SPR effect

H. Jiang, S. Gong, S. Xu, P. Shi, J. Fan, V. Cecen, Q. Xu and Y. Min, Dalton Trans., 2020, Advance Article , DOI: 10.1039/C9DT04935E

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