“Ship-in-a-Bottle” Integration of Ditin(IV) Sites into a Metal–Organic Framework for Boosting Electroreduction of CO2 in Acidic Electrolyte

• DOI: 10.1021/jacs.3c05023
• Publication Date: 2023-08-01T11:24:27Z
• Authors: Huan Xue; Zhen-Hua Zhao; Pei-Qin Liao; Xiao-Ming Chen
• Keywords: Boosting

The electrochemical CO2 reduction reaction (eCO2RR) under acidic conditions has become a promising way to achieve high utilization because of the inhibition undesirable carbonate formation that typically occurs neutral and alkaline conditions. Herein, unprecedented highly active ditin(IV) sites were integrated into nanopores metal-organic framework, namely NU-1000-Sn, by "ship-in-a-bottle" strategy. NU-1000-Sn delivers nearly 100% formic acid Faradaic efficiency at an industry current density 260 mA cm-2 with single-pass 95% in solution (pH = 1.67). No obvious degradation was observed over 15 hours continuous operation cm-2, representing remarkable eCO2RR performance electrolyte date. mechanism study shows both oxygen atoms key intermediate *HCOO can coordinate two adjacent Sn site simultaneously. Such bridging coordination is conducive hydrogenation CO2, thus leading performance.