A Novel One-Step Hydrothermal Preparation of Ru/SnxTi1−xO2 Diesel Oxidation Catalysts and its Low-Temperature Performance

Table 2 The surface compositions by XPS and bulk compositions by EDS of the Sn_xTi_1−xO₂ supports and Ru/Sn_xTi_1−xO₂ catalysts

Samples	C 1s	O 1s	Ti 2p	Sn 3d	Sn/Ti	Ru (XPS)	Ru (EDS)
SnO₂	21.4	62.06	0	16.90
Sn_0.67Ti_0.33O₂	31.23	48.35	5.98	14.44	2.41
Sn_0.5Ti_0.5O₂	22.51	56.16	9.57	11.75	1.23
Sn_0.33Ti_0.67O₂	23.41	55.70	13.20	7.69	0.58
TiO₂	36.59	44.00	19.41	0	0
Ru/SnO₂	16.35	58.58	0	24.94		0.37	0.20
Ru/Sn_0.67Ti_0.33O₂	22.95	53.58	7.66	15.62	2.04	0.69	0.40
Ru/Sn_0.5Ti_0.5O₂	22.4	53.82	11.33	12.27	1.08	0.64	0.28
Ru/Sn_0.33Ti_0.67O₂	29.88	56.95	8.33	4.56	0.55	0.41	0.26
Ru/TiO₂	37.23	50.89	11.50	0	0	0.38	0.24