Surface Local Polarization Induced by Bismuth‐Oxygen Vacancy Pairs Tuning Non‐Covalent Interaction for CO2 Photoreduction

AbstractThe inefficient charge separation and lack of active sites have been regarded as the main obstacles limiting the CO2 photoreduction efficiency. It is highly desirable but challenging to create a local polarization field to accelerate charge separation and build reactive sites for CO2 reduction dynamics. Herein, atomic level bismuth‐oxygen vacancy pairs are engineered into Bi24O31Br10 (BOB) atomic layers to create a local polarization field. It facilitates photogenerated electrons to migrate from BOB to vacancy pair sites and favors the activation of CO2 molecules. Simultaneously, it works as reactive sites to tune the non‐covalent interaction of intermediates and optimizes the reaction process. The vacancy pairs tuned surface atomic structures enable the formation of a highly stable Bi−C−O−Bi intermediate state and consecutive Bi−C−O intermediate, thus changing the rate‐determining step from CO* formation to COOH* formation. Benefiting from these features, the VBiO‐BOB delivers a 20.9‐fold CO2 photoreduction activity enhancement relative to highly crystalline BOB in pure water with highly stability. This work provides new insights for the design of a vacancy pair to create local polarization and tune the non‐covalent interaction.

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Details

Published: Sep 29, 2021
Vol/Issue: 11(41)
License: View

Authors

J

Jun Di

School of Materials Science & Engineering Nanyang Technological University Singapore 639798 Singapore

C

Chao Chen

School of Materials Science & Engineering Nanyang Technological University Singapore 639798 Singapore

C

Chao Zhu

School of Materials Science & Engineering Nanyang Technological University Singapore 639798 Singapore

R

Ran Long

National Synchrotron Radiation Laboratory CAS Center for Excellence in Nanoscience School of Chemistry and Materials Science University of Science and Technology of China Hefei Anhui 230026 P. R. China

H

Hailong Chen

Laboratory of Soft Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 P. R. China

X

Xingzhong Cao

Multi‐Discipline Research Division Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. China

J

Jun Xiong

Institute for Energy Research Jiangsu University Zhenjiang 212013 P. R. China

Y

Yuxiang Weng

Laboratory of Soft Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 P. R. China

L

Li Song

National Synchrotron Radiation Laboratory CAS Center for Excellence in Nanoscience School of Chemistry and Materials Science University of Science and Technology of China Hefei Anhui 230026 P. R. China

S

Sheng Li

School of Materials Science & Engineering Nanyang Technological University Singapore 639798 Singapore

H

Hsin-Hsien Li

Institute for Energy Research Jiangsu University Zhenjiang 212013 P. R. China

Y

Yujie Xiong

National Synchrotron Radiation Laboratory CAS Center for Excellence in Nanoscience School of Chemistry and Materials Science University of Science and Technology of China Hefei Anhui 230026 P. R. China

Z

Zheng Liu

School of Materials Science & Engineering Nanyang Technological University Singapore 639798 Singapore

Funding

National Natural Science Foundation of China Award: 21725102

Key Technologies Research and Development Program Award: 2017YFA0207301

Cite This Article

Jun Di, Chao Chen, Chao Zhu, et al. (2021). Surface Local Polarization Induced by Bismuth‐Oxygen Vacancy Pairs Tuning Non‐Covalent Interaction for CO2 Photoreduction. Advanced Energy Materials, 11(41). https://doi.org/10.1002/aenm.202102389

Surface Local Polarization Induced by Bismuth‐Oxygen Vacancy Pairs Tuning Non‐Covalent Interaction for CO2 Photoreduction

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