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On the impact of Cu dispersion on CO2 photoreduction over Cu/TiO2

2012; Elsevier BV; Volume: 25; Linguagem: Inglês

10.1016/j.catcom.2012.03.025

1873-3905

Dong Liu, Y. Fernández, Oluwafunmilola Ola, Sarah Mackintosh, M. Mercedes Maroto‐Valer, Christopher M. A. Parlett, Adam F. Lee, Jeffrey C.S. Wu,

TiO2 Photocatalysis and Solar Cells

A family of Cu/TiO2 catalysts was prepared using a refined sol–gel method, and tested in the photocatalytic reduction of CO2 by H2O to CH4 using a stirred batch, annular reactor. The resulting photoactivity was benchmarked against pure TiO2 nanoparticles (synthesised by an identical sol–gel route). CO2 photoreduction exhibited a strong volcano dependence on Cu loading, reflecting the transition from 2-dimensional CuOx nanostructures to 3-dimensional crystallites, with optimum CH4 production observed for 0.03 wt.% Cu/TiO2.