Photocatalytic CO2 reduction by highly dispersed Cu sites on TiO2

Nathaniel Aaron Deskins; Chao Liu; Satish Kumar Iyemperumal; Gonghu Li

doi:10.1117/1.JPE.7.012004

18 August 2016 Photocatalytic CO₂ reduction by highly dispersed Cu sites on TiO₂

Nathaniel Aaron Deskins, Chao Liu, Satish Kumar Iyemperumal, Gonghu Li

Author Affiliations +

Journal of Photonics for Energy, Vol. 7, Issue 1, 012004 (August 2016). https://doi.org/10.1117/1.JPE.7.012004

Abstract

Two nanocomposite photocatalysts were synthesized by forming highly dispersed Cu sites on TiO2 surfaces. The synthesized materials were characterized with microscopy, UV-visible, and infrared spectroscopy, and tested in photocatalytic CO2 reduction. Computational modeling was conducted to elucidate the role of single Cu sites in promoting CO2 reduction on TiO2. The nanocomposites demonstrated significantly higher activity than bare TiO2 in photocatalysis, and the activity was found to be related to the chemical state of surface Cu+ species. According to our modeling studies, the highly dispersed Cu sites likely contributed to the improved photocatalysis by stabilizing surface adsorption of CO2 on TiO2. Our experimental and modeling studies further confirmed the direct involvement of surface Cu sites in CO generation via CO2 reduction.

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Nathaniel Aaron Deskins, Chao Liu, Satish Kumar Iyemperumal, and Gonghu Li "Photocatalytic CO₂ reduction by highly dispersed Cu sites on TiO₂," Journal of Photonics for Energy 7(1), 012004 (18 August 2016). https://doi.org/10.1117/1.JPE.7.012004

Published: 18 August 2016

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