We investigated the reactivity of layered GeAs in the presence of oxygen or water using synchrotron-based X-ray photoelectron spectroscopy and ab initio calculations. By performing experiments at near-ambient pressure (up to 20 mbar), we gained detailed insights into the material’s stability under realistic conditions. GeAs showed limited reactivity with dry O2 and deaerated H2O. However, a small amount of humidity (Rw = 0.5% at T = 20 °C) in an O2 atmosphere significantly enhanced reactivity. This synergistic effect was well captured by density functional theory calculations, which revealed a strongly exothermic formation energy for the simultaneous chemisorption of O2 and H2O, compared to the adsorption of each molecule individually.
Synergistic Effect of Oxygen and Water on the Environmental Reactivity of 2D Layered GeAs
Lozzi L.;Passacantando M.;
2025-01-01
Abstract
We investigated the reactivity of layered GeAs in the presence of oxygen or water using synchrotron-based X-ray photoelectron spectroscopy and ab initio calculations. By performing experiments at near-ambient pressure (up to 20 mbar), we gained detailed insights into the material’s stability under realistic conditions. GeAs showed limited reactivity with dry O2 and deaerated H2O. However, a small amount of humidity (Rw = 0.5% at T = 20 °C) in an O2 atmosphere significantly enhanced reactivity. This synergistic effect was well captured by density functional theory calculations, which revealed a strongly exothermic formation energy for the simultaneous chemisorption of O2 and H2O, compared to the adsorption of each molecule individually.Pubblicazioni consigliate
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