G. Kadinov et al., INFRARED STUDY OF CARBON-MONOXIDE ADSORPTION AND HYDROGENATION OVER PD-FE CATALYSTS, Journal of molecular catalysis, 83(1-2), 1993, pp. 157-166
Carbon monoxide adsorption and hydrogenation over several alumina- and
silica-supported Pd and Pd-Fe catalysts have been studied by IR spect
roscopy. A higher ratio of linear to bridged CO species was observed w
ith the Pd-Fe/Al2O3 samples. No methane formation was detected with th
e silica-supported catalysts. The Pd-Fe/Al2O3 catalysts exhibited lowe
r methanation activity, lower rates of formation and decomposition of
the formate species and lower stability and reactivity of the adsorbed
carbon monoxide. A mechanism of methane formation is proposed by whic
h the formate species that occur on the support interact with hydrogen
supplied from the metal by spillover.