Single-phase proton- and electron-conducting Ag-organic coordination polymers for efficient CO 2 electroreduction

• Published in: Journal of materials chemistry. A, Materials for energy and sustainability Vol. 10; no. 6; pp. 3216 - 3225
• Main Authors: Zou, Yingbing, Zhan, Tingting, Yang, Ying, Fan, Zhiwen, Li, Yunbin, Zhang, Yongfan, Ma, Xiuling, Chen, Qianhuo, Xiang, Shengchang, Zhang, Zhangjing
• Format: Journal Article
• Language: English
• Published: 08.02.2022
• ISSN: 2050-7488; 2050-7496
• DOI: 10.1039/D1TA09548J

Here a single-phase proton- and electron-conducting metal–organic coordination polymer (MOCP) electrocatalyst for the CO 2 reduction reaction (CO 2 RR) was constructed by using Ag as the metal center and 1 H -1,2,3-triazole (Tz) as the ligand. To evaluate the effects of tuning the conductivity of Ag-MOCP on CO 2 RR performances, another Ag-MOCP was selected for comparison by using 1 H -benzotriazole (Btz) as the ligand. The proton conductivity for Ag-MOCP-Tz is 2.3 × 10 −7 S cm −1 , 70-fold that for Ag-MOCP-Btz with 3.3 × 10 −9 S cm −1 at 25 °C and 98% RH. And the electron conductivity of Ag-MOCP-Tz (3.57 × 10 −7 S cm −1 ) is 120 times that of Ag-MOCP-Btz (2.96 × 10 −9 S cm −1 ) at 25 °C. Meanwhile the FE CO of Ag-MOCP-Tz is 85.9% at −0.98 V vs. RHE, which is better than that of Ag-MOCP-Btz with 65.4%.