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- W3195585890 abstract "Abstract Metal oxides are the archetypal CO 2 reduction reaction (CO 2 RR) electrocatalysts, yet the inevitable self-reduction will enhance competitive hydrogen evolution and lower the CO 2 RR selectivity. Herein, we propose a tangible superlattice model of alternating metal oxide and sulfide sublayer in which electrons are rapidly exported through the conductive metal sulfide layer to protect the active oxide layer from self-reduction. Taking BiCuSeO superlattices as a proof-of-concept, a comprehensive characterization reveals that the active [Bi 2 O 2 ] 2+ sublayers retain oxidation states rather their self-reduced Bi metal during CO 2 RR because of the rapid electron transfer through the conductive [Cu 2 Se 2 ] 2− sublayer. Theoretical ccalculations uncover the high activity over [Bi 2 O 2 ] 2+ sublayers due to the overlaps between the Bi p orbitals and O p orbitals in HCOO* intermediate, thus achieving over 90% formate selectivity in a wide potential range from − 0.4 to -1.1 V. This work broadens the horizons of studying and improving the CO 2 electroreduction properties of metal oxide systems." @default.
- W3195585890 created "2021-08-30" @default.
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- W3195585890 date "2021-08-20" @default.
- W3195585890 modified "2023-09-23" @default.
- W3195585890 title "Active/Conductive Layer Stacked Superlattices for Highly Selective CO2 Electroreduction" @default.
- W3195585890 doi "https://doi.org/10.21203/rs.3.rs-800328/v1" @default.
- W3195585890 hasPublicationYear "2021" @default.
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