EPR study of platinum supported on NaY

Abstract

Pt/NaY was prepared by the aqueous ion-exchange method and investigated by EPR spectroscopy. After reduction with H₂ using a static system, an orthorhombic EPR signal was observed with g₁ = 2.531, g₂ = 2.322, g₃ = 2.062, coaxial with the hyperfine components a₁ = 64.9 G, a₂ = 74.6 G, a₃ = 72.6 G; this signal is assigned to Pt⁺ ions. Typical cation sites for location in the supercages are excluded for symmetry reasons.

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