Defects in pyrite (100) surface produce chemical evolution of glycine under inert conditions: Experimental and theoretical approach
The presence of non-stoichiometric sites on the pyrite (100) surface makes it a suitable substrate for driving the chemical evolution of glycine amino acid over time, even under inert conditions. Spectroscopic molecular fingerprints prove a transition process from a zwitterionic species to an anionic species over time on the monosulfide enriched surface. By combining experimental and theoretical approaches, we propose a surface mechanism where interaction between amino acids species and the surface will be driven by the quenching of surface states at Fe sites (iron dangling bonds). This study demonstrates the potential capability of pyrite to act as a surface catalyst.