Pt single atoms and defect engineering of TiO-nanosheet-assembled hierarchical spheres for efficient room-temperature HCHO oxidation.

Achieving high atomic utilization and low cost of desirable Pt/TiO catalysts is a major challenge for room temperature HCHO oxidation. Here, the strategy of anchoring stable Pt single atoms by abundant oxygen vacancies over TiO-nanosheet-assembled hierarchical spheres (Pt/TiO-HS) was designed to eliminate HCHO. A superior HCHO oxidation activity and CO yield (∼100% CO yield) at relative humidity (RH) > 50% over Pt/TiO-HS is achieved for long-term run.