CO oxidation catalyzed by RuO₂ nanoparticles supported on mesoporous Al₂O₃ prepared via atomic layer deposition

Using atomic layer deposition (ALD), RuO₂ was deposited on mesoporous Al₂O₃ with a mean pore size of ∼12 nm and particle diameter of ∼1 mm. The entire internal structure of mesoporous Al₂O₃ was coated by RuO₂ nanostructures using ALD, forming a mesoporous bead of RuO₂/Al₂O₃. Substantially high CO oxidation activity at reaction temperatures below 100 °C is also shown. There was a decrease in CO oxidation activity with time at 100 °C, and post-annealing at 700 °C fully recovered the catalytic activity of fresh RuO₂/Al₂O₃. The RuO₂/Al₂O₃ can be useful as an oxidation catalyst for eliminating harmful molecules.