Reflection-absorption infrared spectroscopic study on a CuOX/SiO2 model catalyst prepared by spin-coating on a SiO2/W/Si(100) buried metal substrate

CuOx particles were deposited by spin-coating on a SiO2(50 nm)/W(70 nm)/Si( 100) buried metal substrate using 2-propanol solution of a Cu precursor fol lowed by oxidation. The CuOx/SiO2/W/Si model catalyst was used to detect vi brational modes of submonolayer adsorbates by reflection-absorption infrare d spectroscopy (RAIRS). During methanol reaction on CuOx/SiO2/W/Si, RAIR sp ectra showed that methoxy species was formed on CuOx particles and spilt ov er to the SiO2 substrate, replacing hydroxyl species. (C) 1999 Elsevier Sci ence B.V. All rights reserved.