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Atomic Iridium Species Anchored on Porous Carbon Network Support: An Outstanding Electrocatalyst for CO2 Conversion to CO

Title of paper
Atomic Iridium Species Anchored on Porous Carbon Network Support: An Outstanding Electrocatalyst for CO2 Conversion to CO
Author
[김원배교수 연구실] 이산화탄소 전환 고효율 단원자 전기촉매 개발
Publication in journal
Applied Catalysis B: Environmental 292 (2021) 120173
Publication date
20210905


[Abstract]
Converting CO2 into valuable chemicals using electrocatalysis is an attractive approach for sustainable energy storage and artificial carbon cycle. In this study, atomically dispersed Ir species (Ad-Ir) that are supported on three-dimensional (3D) porous carbon networks are proposed as electrocatalysts for highly efficient CO2 conversion. The resulting catalysts can preferentially and rapidly produce CO with a high Faradaic efficiency of 95.6 % and a very high turnover frequency (TOF) value of 33365 h-1. Furthermore, it shows no obvious decay in both FE for CO and current density over 20 h of continuous operation. Based on detailed experimental studies and density functional theory (DFT) calculations, such outstanding catalytic performance for CO2 conversion to CO production can be attributed to the structural advantages of 3D network of porous carbon and atomically dispersed Ir species on the 3D carbon support. 


DOI: 10.1016/j.apcatb.2021.120173 

Link: https://www.sciencedirect.com/science/article/pii/S092633732100299X