Abstract
Temperature-programmed reaction spectroscopy (TPRS) and reflection absorption infrared spectroscopy (RAIRS) were used to study the adsorption and hydrogenation of acrolein on Ru(001). At low coverages, acrolein adsorbs on the surface at 90 K mostly via the C═O bond and completely decomposes to CO around 460 K. As the coverage increases, adsorption via the C═C bond predominates and most of the acrolein either desorbs molecularly or decomposes to CO and H2. However, a small amount of the acrolein also self-hydrogenates to yield all the possible hydrogenation products, propanal, 2-propenol, and 1-propanol, with TPRS peak temperatures of 180, 210, and 280 K respectively, with propanal having the highest yield. Co-adsorption with hydrogen enhances the adsorption via the C═C bond and the yield of all the hydrogenation products. The formation of propanal and 1-propanol was also confirmed by RAIRS to occur at approximately the same temperatures as observed with TPRS, with the intensity of the RAIRS peaks indicati...
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