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

Table 1

XPS results of the series of 1.0% Pt/MORn catalysts.

Catalysts	Pt species	Peak area (BE)^a (Pt 4f7/2)	Sum of peak area (Pt 4f7/2)
1.0%	Pt^0	37.0 (71.2)	93.2
Pt/MORn	Pt^2+	56.2 (71.7)
1.0%	Pt^0	97.0 (70.9)	161.5
Pt/MORn-H	Pt^2+	64.5 (71.8)
1.0%	Pt^0	87.4 (71.0)	138.0
Pt/MORn-OH	Pt^2+	50.6 (71.7)
1.0%	Pt^0	131.0 (71.1)	223.6
Pt/MORn-H-OH	Pt^2+	92.0 (71.9)

^aPeak area was estimated from XPS measurements, and the relative binding energy (eV) is shown in parenthesis.