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Screening Janus-2H-WSSe with Adsorbed Transition Metals as Efficient Catalyst for Nitrogen Reduction Reaction #MMPMID41319345
Wu H; Zhang H; Zhao L; An Y
Chemphyschem 2025[Nov]; ? (?): e202500225 PMID41319345show ga
Electrocatalytic nitrogen reduction reaction (NRR) provides a promising strategy for effective nitrogen fixation under mild conditions. Herein, structural stability and NRR catalytic activity of 29 transition metal (TM, Sc-Hg) atoms adsorbed Janus 2H-WSSe monolayers are studied using the first-principles calculations. Six screened TM@S/Se-WSSe (TM = Os, Re) and TM@Se-WSSe (TM = Ir, Mo) systems are considered promising single-atom catalysts (SACs) due to low limiting potential (-0.36 to -0.73 V) and high Faradaic efficiency (FE > 90.61%). High catalytic activity arises from the donation and back-donation mechanisms between the empty/unoccupied TM-d orbitals and the bonding/antibonding N(2)-p orbitals, which significantly promote the activation of N(2) and the charge transfer in the subsequent hydrogenation reactions. In addition, the catalytic activity trend of the screened TM@WSSe systems is further analyzed by four descriptors (DeltaG(*NNH), DeltaG(*NH2), DeltaG(*N), and phi). The high activity can be achieved by individually tuning DeltaG(*NH2) or DeltaG(*NNH). Meanwhile, the TM@WSSe with DeltaG(*N) = -1.38 eV and phi = 6 exhibits the best catalytic activity. The results provide insights into designing efficient nitrogen fixation electrocatalysts.