Silica-supported Pt(0) single-atom catalyst chemisorbing hydrogen but converting to Pt(iv) by ambient oxygen

Abstract

We confirmed the stabilization of Pt(0) single atoms on porous silica using electron microscopy and X-ray absorption. The Pt/silica exhibited strong chemisorption of 2.0H/Pt, but no catalytic activity was observed for olefin hydrogenation. The Pt(0) state was changed to Pt(IV) by ambient O₂, which led to doubt about oxidation catalytic abilities as Pt(0).