Volume 64, Issue 13 e202423204
Research Article

In Situ Growth of Metal-Organic Layer on Polyoxometalate-etching Cu2O to Boost CO2 Reduction with High Stability

Yu-Jie Wang

Yu-Jie Wang

Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin, 300384 China

Key Laboratory of Polyoxometalate Science of the Ministry of Education, College of Chemistry, Northeast Normal University, Jilin, 130024 China

Search for more papers by this author
Xin Cheng

Xin Cheng

Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin, 300384 China

Search for more papers by this author
Dr. Na-Na Ma

Dr. Na-Na Ma

Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007 China

Search for more papers by this author
Wei-Yi Cheng

Wei-Yi Cheng

Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007 China

Search for more papers by this author
Peng Zhang

Peng Zhang

Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin, 300384 China

Search for more papers by this author
Prof. Fang Luo

Prof. Fang Luo

Key Laboratory of Polyoxometalate Science of the Ministry of Education, College of Chemistry, Northeast Normal University, Jilin, 130024 China

Search for more papers by this author
Prof. Wen-Xiong Shi

Prof. Wen-Xiong Shi

Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin, 300384 China

Search for more papers by this author
Prof. Shuang Yao

Prof. Shuang Yao

Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin, 300384 China

Search for more papers by this author
Prof. Tong-Bu Lu

Prof. Tong-Bu Lu

Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin, 300384 China

Search for more papers by this author
Prof. Zhi-Ming Zhang

Corresponding Author

Prof. Zhi-Ming Zhang

Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin, 300384 China

Search for more papers by this author
First published: 07 January 2025
Citations: 5

Graphical Abstract

POM-etching for in situ growth of metal-organic layer can simultaneously incorporate electron sponge and protective layer into Cu2O. The resulting ternary composites exhibit exceptional robustness and achieve efficient CO2 conversion to HCOOH with a yield 55 times higher than that of binary Cu2O@HKUST.

Abstract

Low-cost Cu2O with a suitable band gap holds great potential for solar utilization. However severe photocorrosion and weak CO2 capture capability have significantly hindered their application in artificial photosynthesis. Herein, polyoxometalate (POM)-etching and in situ growth of metal–organic framework (MOF) can simultaneously incorporate electron-sponge and HKUST protective layer into Cu2O. The resulting ternary composites Cu2O@POM@HKUST-n (POM=PMo12O40 and PW12O40) with dual hetero-interfaces can efficiently convert CO2 to HCOOH with 5226 μmol g−1 yield, over 5 and 55 times higher than that of Cu2O (1010 μmol g−1) and Cu2O@HKUST (95.02 μmol g−1). In situ XPS and DFT studies reveal that Cu mainly existed in the form of Cu2O and Cu-MOF, while a unique Cux+ (1<x≤2) surface layer formed upon the Cu2O matrix surrounding POMs for CO2 absorption and activation. Systematic investigations demonstrate that the electron-sponge can efficiently capture electrons from excited Cu2O to promote the generation of a Cux+ surface layer, while the closely surface-coating metal-organic layer can act as protective layer and CO2 adsorbent. This dual function concurrently contributes to promote photocatalysis and prevent Cu2O degradation. Remarkably, the composites exhibit much enhanced photochemical stability and can be used for over 60 h without noticeable activity loss.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.