Ab Initio Microkinetics of H2S Interactions with Clean and Sulfided Au(110) at Low Temperature: A Strong Assistance in Partial Dissociation from Single Sulfur Atoms
Abstract:A microkinetic model built on first-principles calculations is developed to clarify an ongoing experimental controversy regarding whether hydrogen sulfide (H 2 S) molecules are intact or dissociated on pristine and S-covered Au(110) surfaces at 120 K. From the simulation, we prove that only associative adsorption of H 2 S on the defect-free, flat (110) facet of gold occurs in the exposure region under investigation, whereas its reaction with sulfur adsorbed as single atoms straightforwardly proceeds to yield r… Show more
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