4.5 Article

Operando FTIR study of the photocatalytic reduction of CO2 in the presence of water vapor over Pt/TiO2: on the role of surface residual C-species

Journal

SUSTAINABLE ENERGY & FUELS
Volume 7, Issue 12, Pages -

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d3se00227f

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The photoreduction of CO2 in the vapor phase influenced by catalytic pathways of Benchmark TiO2 and Pt/TiO2 photocatalysts was investigated through operando FTIR spectroscopy. The presence of carboxylates as carbonaceous surface impurities was identified, and their involvement in surface reactions was demonstrated.
Benchmark TiO2 and Pt/TiO2 photocatalysts were investigated by performing operando FTIR spectroscopy to shed light on catalytic pathways influencing photoreduction of CO2 in the vapor phase. Through a combination of multivariate curve resolution and chemometric analyses, the carbonaceous surface impurities were identified to be carboxylates, and the mechanisms of their subsequent involvement in surface reactions were demonstrated.

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