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Internal electric field engineering step-scheme–based heterojunction using lead-free Cs3Bi2Br9 perovskite–modified In4SnS8 for selective photocatalytic CO2 reduction to CO

Zhang, Zhenzong ; Wang, Meiyang ; Chi, Zexu ; Li, Wenjie ; Yu, Han LU ; Yang, Nan and Yu, Hongbing (2022) In Applied Catalysis B: Environmental 313.
Abstract

This study focuses on improving photocatalytic CO2 reduction reaction (CRR) activity and modulating product selectivity. An In4SnS8/Cs3Bi2Br9-X (ISS/CBB-X) heterojunction is prepared using novel lead-free Cs3Bi2Br9 perovskite quantum dot–modified In4SnS8, which shows considerable potential as photocatalysts for CRRs under visible light. The optimised ISS/CBB photocatalyst exhibits high activity and CO selectivity with a CO yield and selectivity of 9.55 μmol g−1 h−1 and 92.9%, respectively, 3.8 and 1.5 times higher than those of pristine ISS, respectively. Moreover, the step-scheme (S-scheme)... (More)

This study focuses on improving photocatalytic CO2 reduction reaction (CRR) activity and modulating product selectivity. An In4SnS8/Cs3Bi2Br9-X (ISS/CBB-X) heterojunction is prepared using novel lead-free Cs3Bi2Br9 perovskite quantum dot–modified In4SnS8, which shows considerable potential as photocatalysts for CRRs under visible light. The optimised ISS/CBB photocatalyst exhibits high activity and CO selectivity with a CO yield and selectivity of 9.55 μmol g−1 h−1 and 92.9%, respectively, 3.8 and 1.5 times higher than those of pristine ISS, respectively. Moreover, the step-scheme (S-scheme) mechanism can be fully confirmed via in situ irradiated X-ray photoelectron spectroscopy, in situ electron spin resonance, femtosecond time-resolved absorption spectroscopy and density functional theory calculations. Based on in situ diffuse reflectance spectra and theoretical investigations, the ISS/CBB shows a decreased energy barrier towards CO2 reduction to CO through an adsorbed ⁕COOH intermediate. This study contributes to the further understanding of fabricating efficient S-scheme-based photocatalysts for selective CRR.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
CO reduction, CsBiBr perovskite, InSnS, Internal electric field, Photocatalysis
in
Applied Catalysis B: Environmental
volume
313
article number
121426
publisher
Elsevier
external identifiers
  • scopus:85129433502
ISSN
0926-3373
DOI
10.1016/j.apcatb.2022.121426
language
English
LU publication?
yes
id
06926db9-a78f-4163-a3fd-53290262a52c
date added to LUP
2022-07-05 14:53:32
date last changed
2022-07-05 14:53:32
@article{06926db9-a78f-4163-a3fd-53290262a52c,
  abstract     = {{<p>This study focuses on improving photocatalytic CO<sub>2</sub> reduction reaction (CRR) activity and modulating product selectivity. An In<sub>4</sub>SnS<sub>8</sub>/Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub>-X (ISS/CBB-X) heterojunction is prepared using novel lead-free Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> perovskite quantum dot–modified In<sub>4</sub>SnS<sub>8</sub>, which shows considerable potential as photocatalysts for CRRs under visible light. The optimised ISS/CBB photocatalyst exhibits high activity and CO selectivity with a CO yield and selectivity of 9.55 μmol g<sup>−1</sup> h<sup>−1</sup> and 92.9%, respectively, 3.8 and 1.5 times higher than those of pristine ISS, respectively. Moreover, the step-scheme (S-scheme) mechanism can be fully confirmed via in situ irradiated X-ray photoelectron spectroscopy, in situ electron spin resonance, femtosecond time-resolved absorption spectroscopy and density functional theory calculations. Based on in situ diffuse reflectance spectra and theoretical investigations, the ISS/CBB shows a decreased energy barrier towards CO<sub>2</sub> reduction to CO through an adsorbed ⁕COOH intermediate. This study contributes to the further understanding of fabricating efficient S-scheme-based photocatalysts for selective CRR.</p>}},
  author       = {{Zhang, Zhenzong and Wang, Meiyang and Chi, Zexu and Li, Wenjie and Yu, Han and Yang, Nan and Yu, Hongbing}},
  issn         = {{0926-3373}},
  keywords     = {{CO reduction; CsBiBr perovskite; InSnS; Internal electric field; Photocatalysis}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Applied Catalysis B: Environmental}},
  title        = {{Internal electric field engineering step-scheme–based heterojunction using lead-free Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> perovskite–modified In<sub>4</sub>SnS<sub>8</sub> for selective photocatalytic CO<sub>2</sub> reduction to CO}},
  url          = {{http://dx.doi.org/10.1016/j.apcatb.2022.121426}},
  doi          = {{10.1016/j.apcatb.2022.121426}},
  volume       = {{313}},
  year         = {{2022}},
}