Atomically Thin Tin Dioxide Sheets for Efficient Catalytic Oxidation of Carbon Monoxide

The thinner the better: SnO2 sheets that are five atomic layers thick are an efficient catalyst for the oxidation of CO (see picture). These sheets, which have 40 % surface atom occupancy and are fabricated by a scalable ethylenediamine‐assisted pathway, show remarkably improved catalytic performances compared to other SnO2 species, with the apparent activation energy lowered to 59.2 kJ mol−1 and the full‐conversion‐temperature lowered to 250 °C.