High selectivity of photocatalytic reduction of CO2 to CO based on terpyridine ligand supported CuI metal organic framework

Wen-Dong Zhang; Yun Wang; Yi Liang; Ai-Lin Jiang; Hao Gong; Xiao-Ying Tian; Wen-Sheng Fu; Jia-Zhen Liao; Peng Chen; Ying-Zhao Ma

doi:10.3389/fchem.2022.974907

High selectivity of photocatalytic reduction of CO₂ to CO based on terpyridine ligand supported Cu^I metal organic framework

Front Chem. 2022 Aug 5:10:974907. doi: 10.3389/fchem.2022.974907. eCollection 2022.

Authors

Affiliations

¹ Chongqing Key Laboratory of Green Synthesis and Application, College of Chemistry, Chongqing Normal University, Chongqing, China.
² Chongqing Key Laboratory of Inorganic Functional Materials, College of Chemistry, Chongqing Normal University, Chongqing, China.
³ Chongqing College of Electronic Engineering, Chongqing, China.

Abstract

In this work, a 4'-(4-cynaophenyl)-4,2':6',4-terpyridine supported Cu^I MOFs photocatalyst (Cu ^I MOF) was applied to the photocatalytic CO₂ reduction for the first time. The micro-structural and physicochemical properties of the Cu ^I MOF were systematically studied by the powder X-ray diffraction (PXRD), Single crystal X-ray diffraction (SCXRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR), UV-Vis diffuse spectroscopy (UV-vis DRS), ns-level photoluminescence spectra (ns-level PL), Ultraviolet photoelectron spectroscopy (UPS), and N₂ adsorption-desorption test (BET-BJH). Moreover, the in situ diffuse reflectance infrared fourier transform spectroscopy (in situ DRIFTS) was applied to investigate the adsorption and reaction intermediates of photocatalytic CO₂ reduction. As a result, Cu ^I MOF exhibited good performance and outstanding selectivity toward photocatalytic reduction of CO₂ to CO under full-spectrum and visible light illumination. Notably, 100% selective photocatalytic conversion of CO₂ to CO was achieved. Thus, the study presents the high selectivity and CO₂ reduction efficiency of Cu ^I MOF as a potential family of photocatalysts.

Keywords: CuI MOF; high selectivity; photocatalyst; photocatalytic CO2 reduction; terpyridine ligand.