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Abstract:
Cu2O clusters/TiO2 nanosheet (CNSX) as a photocatalyst is created to tailor the selectivity of CO2 photoreduction. The catalysts show different selectivity of CO and CH4 with the increase of Cu2O mass. TiO2 nanosheet (NS) exhibits 100% selectivity of CH4 with a rate of 37.6 μmol g−1 h−1. However, CO2 would be converted to CO with selectivity of 98% and yield of 162.6 μmol g−1 h−1 on 5 wt% Cu2O/TiO2 nanosheet (CNS3). The Ti···CO2–···Ti coordination intermediate on Ti3+ sites is responsible for CH4 formation, whereas the Cu···CO2···Ti specie on Cu1-δ and Ti4+δ sites determines CO production. The Cu+–Ti3+ interface interaction on CNSX surface can generate Cu1-δ and Ti4+δ sites and eliminate Ti3+ via the charge transfer from Ti3+ to Cu+. The selectivity is thus tailored effectively by Cu+–Ti3+ interface interaction mediated CO2 coordination model. This work would offer a new perspective for tailoring the selectivity of CO2 photoreduction. © 2021 Elsevier B.V.
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Applied Catalysis B: Environmental
ISSN: 0926-3373
Year: 2022
Volume: 301
2 2 . 1
JCR@2022
2 0 . 3 0 0
JCR@2023
ESI HC Threshold:74
JCR Journal Grade:1
CAS Journal Grade:1
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 1
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