1. Modulation of p -Block Electron Orbits in Metal-Organic Frameworks for CO 2 Capture and Electrochemical Reduction.
- Author
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Shao LY, Wang S, Li SN, Meng J, Yue JN, Yuan WY, Wang Y, and Zhai QG
- Abstract
Developing catalysts with excellent CO
2 capture capability and electrochemical CO2 reduction reaction (CO2 RR) at a wide potential range simultaneously is significant but remains a formidable challenge. Here, two novel InMg defective trinuclear cluster-based MOFs (SNNU-41 and SNNU-42) with abundant p -block unsaturated coordinated sites were reported and exhibited good CO2 capture and CO2 RR performance simultaneously. Due to the suitable micropores, SNNU-41 showed higher CO2 capture ability at different adsorption pressure conditions. On account of the rigid framework and the closer p band center to Fermi level, SNNU-42 accelerated the conversion of CO2 molecule to C1 efficiency. Notably, via adjusting the ratio of p -block metal (In) in the SNNU-42 framework, the performance of the CO2 RR was promoted drastically. SNNU-42 with the InMg (1:1.8) mixed cluster delivered an excellent Faradaic efficiency of 91.3% for C1 products and high selectivity of 72.0% for HCOOH at -2.5 V (vs Ag/Ag+ ) with a total current density of 77.2 mA cm-2 . This work provides a possibility for efficient CO2 capture and CO2 RR electrocatalysts through the modulation of electronic structures and composition in MOFs.- Published
- 2024
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