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• W4384662938 abstract "Single-atom M-N2 (M=Fe, Co, Ni) catalysts exhibit high activity for CO2 reduction reaction (CO2 RR). However, the CO2 RR mechanism and the origin of activity at the single-atom sites remain unclear, which hinders the development of single-atom M-N2 catalysts. Here, using density functional theory calculations, we reveal intermediates-induced CO2 RR activity at the single-atom M-N2 sites. At the M-N2 sites, the asymmetric *O*CO configuration tends to split into *CO and *OH intermediates. Intermediates become part of the active moiety to form M-(CO)N2 or M-(OH)N2 sites, which optimizes the adsorption of intermediates on the M sites. The maximum free energy differences along the optimal CO2 RR pathway are 0.30, 0.54, and 0.28 eV for Fe-(OH)N2 , Co-(CO)N2 , and Ni-(OH)N2 sites respectively, which is lower than those of Fe-N2 (1.03 eV), Co-N2 (1.24 eV) and Ni-N2 (0.73 eV) sites. The intermediate modification can shift the d-band center of the spin-up (minority) state downward by regulating the charge distribution at the M sites, leading to less charge being accepted by the intermediates from the M sites. This work provides new insights into the understanding of the activity of single-atom M-N2 sites." @default.
• W4384662938 created "2023-07-20" @default.
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• W4384662938 date "2023-08-03" @default.
• W4384662938 modified "2023-10-14" @default.
• W4384662938 title "Intermediates‐induced CO2 reduction reaction activity at single‐atom M‐N2 (M = Fe, Co, Ni) sites" @default.
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• W4384662938 doi "https://doi.org/10.1002/cphc.202300050" @default.
• W4384662938 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37466365" @default.
• W4384662938 hasPublicationYear "2023" @default.
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