Strain-Induced Surface Interface Dual Polarization Constructs PML-Cu/Bi12O17Br2 High-Density Active Sites for CO2 Photoreduction
Highlights Strain induces coupling in Bi 12 O 17 Br 2 and Cu porphyrin-based monoatomic layer (PML-Cu), constructing Bi–O bonding interface in PML-Cu/BOB (PBOB). Surface interface dual polarization boosts internal electric field, promoting electron transfer. PML-Cu provides high density of dispersed...
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Published in | Nano-micro letters Vol. 16; no. 1; p. 90 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Singapore
Springer Nature Singapore
01.12.2024
Springer Nature B.V SpringerOpen |
Subjects | |
Online Access | Get full text |
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Summary: | Highlights
Strain induces coupling in Bi
12
O
17
Br
2
and Cu porphyrin-based monoatomic layer (PML-Cu), constructing Bi–O bonding interface in PML-Cu/BOB (PBOB).
Surface interface dual polarization boosts internal electric field, promoting electron transfer.
PML-Cu provides high density of dispersed active Cu sites in PBOB, enhancing CO
2
photoreduction.
The insufficient active sites and slow interfacial charge transfer of photocatalysts restrict the efficiency of CO
2
photoreduction. The synchronized modulation of the above key issues is demanding and challenging. Herein, strain-induced strategy is developed to construct the Bi–O-bonded interface in Cu porphyrin-based monoatomic layer (PML-Cu) and Bi
12
O
17
Br
2
(BOB), which triggers the surface interface dual polarization of PML-Cu/BOB (PBOB). In this multi-step polarization, the built-in electric field formed between the interfaces induces the electron transfer from conduction band (CB) of BOB to CB of PML-Cu and suppresses its reverse migration. Moreover, the surface polarization of PML-Cu further promotes the electron converge in Cu atoms. The introduction of PML-Cu endows a high density of dispersed Cu active sites on the surface of PBOB, significantly promoting the adsorption and activation of CO
2
and CO desorption. The conversion rate of CO
2
photoreduction to CO for PBOB can reach 584.3 μmol g
−1
, which is 7.83 times higher than BOB and 20.01 times than PML-Cu. This work offers valuable insights into multi-step polarization regulation and active site design for catalysts. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 2311-6706 2150-5551 |
DOI: | 10.1007/s40820-023-01309-w |