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Isolated single atom cobalt in Bi3O4Br atomic layers to trigger efficient CO2 photoreduction
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Journal Article
Isolated single atom cobalt in Bi3O4Br atomic layers to trigger efficient CO2 photoreduction
2019
Overview
The design of efficient and stable photocatalysts for robust CO
2
reduction without sacrifice reagent or extra photosensitizer is still challenging. Herein, a single-atom catalyst of isolated single atom cobalt incorporated into Bi
3
O
4
Br atomic layers is successfully prepared. The cobalt single atoms in the Bi
3
O
4
Br favors the charge transition, carrier separation, CO
2
adsorption and activation. It can lower the CO
2
activation energy barrier through stabilizing the COOH* intermediates and tune the rate-limiting step from the formation of adsorbed intermediate COOH* to be CO* desorption. Taking advantage of cobalt single atoms and two-dimensional ultrathin Bi
3
O
4
Br atomic layers, the optimized catalyst can perform light-driven CO
2
reduction with a selective CO formation rate of 107.1 µmol g
−1
h
−1
, roughly 4 and 32 times higher than that of atomic layer Bi
3
O
4
Br and bulk Bi
3
O
4
Br, respectively.
While the conversion of CO
2
to high-value products provides a promising means to remove and utilize atmospheric carbon, few materials can do so without wasteful, sacrificial reagents. Here, authors prepare single-atom Co on Bi
3
O
4
Br nanosheets as CO
2
reduction catalysts using water and light.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
