Apatite-type silicate (La(8)A(2)Si(6)O(26) (A=Ca, Sr, Ba)) supported Pt catalysts were prepared and their catalytic activities were investigated for NO reduction. La(8)A(2)Si(6)O(26) were obtained by the sol-gel method. Pt/La(8)A(2)Si(6)O(26) (A=Ca, Sr, Ba) catalysts loaded with 1 mass% of Pt were prepared by the impregnation method. The maximum NO conversions for C3H6-NO-O-2 reaction over Pt/La(8)A(2)Si(6)O(26) catalyst were 37%, 41% and 50% for A = Ca, Sr and Ba, respectively. The reduction properties of Pt on the catalysts were evaluated by temperature programmed reduction (TPR). The composition of the apatite-type support affected the reduction property of Pt on the catalyst, resulting in promotion of catalytic activity for C3H6-NO-O-2 reaction below 300 degrees C. (C) 2011 Elsevier B.V. All rights reserved.