Bimetallic CeZr5-UiO-66 as a highly efficient photocatalyst for the nitrogen reduction reaction. Issue 16 (16th July 2021)

• Record Type: Journal Article
• Authors: Zhang, Xu; Li, Xiaoman; Gao, Wanguo; Luo, Shijian; Su, Senda; Huang, Rong; Luo, Min
• Is Part Of: Sustainable energy & fuels. Volume 5:Issue 16(2021)
• Page Start: 4053
• Page End: 4059
• Publication Date: 2021-07-16
• Subjects: Renewable energy sources -- Periodicals; Fuel cells -- Periodicals; Electric batteries -- Periodicals; Electrochemistry -- Periodicals; 660.297
• DOI: 10.1039/d1se00658d
• Languages: English
• ISSNs: 2398-4902

Abstract

Abstract : The LMCT mechanism of the photocatalytic nitrogen reduction reaction of bimetallic CeZr5 -UIO-66. Abstract : Metal node substitution in metal organic frameworks is an efficient strategy to enhance their photocatalytic properties. Herein, bimetallic CeZr5 -MOF UiO-66 photocatalysts were successfully synthesized by partially replacing Zr with Ce for enhancing the photocatalytic N2 reduction reaction (NRR). The rare earth element Ce was introduced into the node of Zr-MOFs (UiO-66) to form CeZr5 clusters, which enhanced the efficiency of photoexcited electron–hole pair separation and charge transfer via the ligand-to-metal charge transfer process (LMCT), thus promoting the photocatalytic nitrogen fixation performance. Photocatalytic properties increase linearly with the increase of Ce content. Higher Ce proportions (>20%) resulted in new MOFs (Ce-BDC-24) with low photocatalytic activity. The bimetallic system showed enhanced photocatalytic activities for N2 reduction, which was 105.9% higher than that of Zr-UiO-66 and reached 200.13 μmol g −1 h −1 . Furthermore, the possible energy transfer mechanism was proposed to explain the photo-induced charge transfer process in the bimetallic UiO-66(CeZr5 ) system.