Applied Catalysis B: Environmental, volume 343, pages 123583

Defective Heterojunctions in CO2 Photoreduction: Enabling Ultrafast Interfacial Charge Transfer and Selective Methanation

Shuwen Cheng ^{1, 2}

Zhehao Sun ³

Kang Hui Lim ¹

Kaili Liu

Kai-Li Liu ³

Ary Anggara Wibowo

Ary Wibowo ⁴

Tao Du ²

Liying Liu ²

Hieu T Nguyen ⁴

Gang Kevin Li ⁵

Zongyou Yin ³

Sibudjing Kawi ¹

Hide authors affiliations Show authors affiliations: 5 affiliations

Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 119260, Singapore |

School of Metallurgy, Northeastern University, Shenyang 110819, PR China |

Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia |

⁴

School of Engineering, Australian National University, Canberra, ACT 2601, Australia |

⁵

Department of Chemical Engineering, The University of Melbourne, Melbourne, VIC 3010, Australia |

Publication type: Journal Article

Publication date: 2024-04-01

Elsevier

Journal: Applied Catalysis B: Environmental

Quartile SCImago

Quartile WOS

Impact factor: 22.1

ISSN: 09263373, 18733883

DOI: 10.1016/j.apcatb.2023.123583

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Catalysis

Process Chemistry and Technology

General Environmental Science

Abstract

This study achieved the goal of enhancing photocatalytic methane production and selectivity by constructing a S-scheme heterojunction of TiO2/g-C3N4 followed by conducting a mild-temperature hydrogen reduction to remove hydroxyl groups from the catalyst surface, thereby generating rich vacancies-related active sites. The rate of CO2 photoreduction to CH4 under pure water from the H2-Ti-CN sample is around 27.4 μmol g-1 h-1 with 93.6% selectivity, which is 39.1-fold and 5.59-fold that of pristine g-C3N4 and TiO2, respectively. In addition, the DFT calculation indicates that the vacancies created via hydrogen reduction-mediated heterojunctions effectively tune the energy barrier, resulting in a decrease in the production of the two-electron product CO and concurrently improves the selectivity of the eight-electron reaction. The significantly enhanced photocatalytic performance is ascribed to defects fostering ultrafast charge carrier transfer channels and facilitating the transfer of light-excited charges to the surface, thereby enhancing its high redox capabilities in catalytic reactions.

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Cheng S. et al. Defective Heterojunctions in CO2 Photoreduction: Enabling Ultrafast Interfacial Charge Transfer and Selective Methanation // Applied Catalysis B: Environmental. 2024. Vol. 343. p. 123583.

GOST all authors (up to 50) Copy

Cheng S., Sun Z., Lim K. H., Liu K., Liu K., Wibowo A., Wibowo A. A., Du T., Liu L., Nguyen H. T., Li G. K., Yin Z., Kawi S. Defective Heterojunctions in CO2 Photoreduction: Enabling Ultrafast Interfacial Charge Transfer and Selective Methanation // Applied Catalysis B: Environmental. 2024. Vol. 343. p. 123583.

RIS |

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RIS Copy

TY - JOUR

DO - 10.1016/j.apcatb.2023.123583

UR - https://linkinghub.elsevier.com/retrieve/pii/S0926337323012262

TI - Defective Heterojunctions in CO2 Photoreduction: Enabling Ultrafast Interfacial Charge Transfer and Selective Methanation

T2 - Applied Catalysis B: Environmental

AU - Cheng, Shuwen

AU - Sun, Zhehao

AU - Lim, Kang Hui

AU - Liu, Kai-Li

AU - Wibowo, Ary

AU - Du, Tao

AU - Liu, Liying

AU - Nguyen, Hieu T

AU - Li, Gang Kevin

AU - Yin, Zongyou

AU - Kawi, Sibudjing

AU - Liu, Kaili

AU - Wibowo, Ary Anggara

PY - 2024

DA - 2024/04/01 00:00:00

PB - Elsevier

SP - 123583

VL - 343

SN - 0926-3373

SN - 1873-3883

ER -

BibTex

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BibTex Copy

@article{2024_Cheng,

author = {Shuwen Cheng and Zhehao Sun and Kang Hui Lim and Kai-Li Liu and Ary Wibowo and Tao Du and Liying Liu and Hieu T Nguyen and Gang Kevin Li and Zongyou Yin and Sibudjing Kawi and Kaili Liu and Ary Anggara Wibowo},

title = {Defective Heterojunctions in CO2 Photoreduction: Enabling Ultrafast Interfacial Charge Transfer and Selective Methanation},

journal = {Applied Catalysis B: Environmental},

year = {2024},

volume = {343},

publisher = {Elsevier},

month = {apr},

url = {https://linkinghub.elsevier.com/retrieve/pii/S0926337323012262},

pages = {123583},

doi = {10.1016/j.apcatb.2023.123583}

}

Found error?

Publisher

Elsevier

Journal

Applied Catalysis B: Environmental

Quartile SCImago

Quartile WOS

Impact factor

22.1

ISSN

09263373 (Print)
18733883 (Electronic)

Profiles

Yin, Zongyou