Abstract
The kinetics of methane synthesis from H 2 CO mixtures has been studied over Ni, Co, and Fe foils. The gas composition of a flowing reaction cell was analyzed using a differentially pumped, modulated mass spectrometer. Ni and Co foils that have been previously oxidized and then reduced in H 2 at 525–600 °K show a surprisingly high and specific catalytic activity for methane formation. No unusual activity was observed over iron for any of the surface treatments tried here. Evidence is also presented to support a mechanism for this highly specific reaction involving a labile surface carbon atom intermediate.
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