Photocatalytic CO2 Reduction Coupled with Oxidation of Benzyl Alcohol over CsPbBr3@PANI Nanocomposites

Fuwei Chen; Ziquan Li; Yueming Jiang; Zhen Li; Ruosheng Zeng; Ziyi Zhong; Ming-De Li; Jin Z Zhang; Binbin Luo

doi:10.1021/acs.jpclett.3c02766

Photocatalytic CO₂ Reduction Coupled with Oxidation of Benzyl Alcohol over CsPbBr₃@PANI Nanocomposites

J Phys Chem Lett. 2023 Dec 14;14(49):11008-11014. doi: 10.1021/acs.jpclett.3c02766. Epub 2023 Dec 4.

Authors

Fuwei Chen¹, Ziquan Li¹, Yueming Jiang¹, Zhen Li¹, Ruosheng Zeng², Ziyi Zhong^{3

4}, Ming-De Li¹, Jin Z Zhang⁵, Binbin Luo¹

Affiliations

¹ Department of Chemistry and Chemical Engineering, Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou 515063, P. R. China.
² School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, P. R. China.
³ Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Shantou 515063, P. R. China.
⁴ Technion-Israel Institute of Technology (IIT), Haifa 32000, Israel.
⁵ Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States.

PMID: 38047753
DOI: 10.1021/acs.jpclett.3c02766

Abstract

Herein, we successfully prepare conductive polyaniline (PANI)-encapsulated CsPbBr₃ perovskite nanocrystals (PNCs) that demonstrate much improved photocatalytic performance and stability toward the CO₂ reduction reaction (CRR) coupled with oxidation of benzyl alcohol (BA) to benzaldehyde. Due to the acid-base interaction between CO₂ and PANI, CO₂ molecules are selectively adsorbed on PANI in the form of carbamate. As a result, the rate of production of CO (r_CO) reaches 26.1 μmol g^-1 h^-1 with a selectivity of 98.1%, which is in good agreement with the rate of oxidation (∼27.0 μmol g^-1 h^-1) of BA. Such a high reduction/oxidation rate is enabled by the fast electron transfer (∼2.2 ps) from PNCs to PANI, as revealed by femtosecond transient absorption spectroscopy. Moreover, because of the benefit of the encapsulation of PANI, no significant decrease in r_CO is observed in a 10 h CRR test. This work offers insight into how to simultaneously achieve improved photocatalytic performance and stability of CsPbX₃ PNCs.