Acid-Alkali-Treated Natural Mordenite-Supported Platinum Nanoparticles (Pt/MORn-H-OH) for Efficient Catalytic Oxidation of Formaldehyde at Room Temperature

Figure 3

TEM images of the as-prepared catalysts: (a) 1% Pt/MORn; (b) 1% Pt/MORn-H; (c) 1% Pt/MORn-OH; (d) 1% Pt/MORn-H-OH.