The catalytic room temperature oxidation of formaldehyde (HCHO) is widely considered as a viable method for the abatement of indoor toxic HCHO pollution. Herein, Pt/MnO 2 nanoflowers anchored to boron nitride aerogels (Pt/MnO 2 -BN) were fabricated for the catalytic room temperature oxidation of HCHO. The three-dimensional Pt/MnO 2 -BN aerogels demonstrated superior catalytic activity as a result of the improved diffusion of the reactant molecules within the porous structure. Furthermore, the porous aerogels displayed excellent HCHO adsorption capacities, which promote a rapid HCHO gas-phase concentration reduction and a subsequent complete oxidation of the adsorbed HCHO. The combined adsorption and oxidation properties of the Pt/MnO 2 -BN aerogels synergistically enhance the oxidative removal of HCHO. The optimized Pt/MnO 2 -BN demonstrated excellent catalytic activity toward HCHO (200 ppm) at room temperature, achieving a 96% formaldehyde conversion after 50 min.