C-tracer study of the Fischer–Tropsch synthesis: another interpretation

The ¹³C-tracer results from the introduction of ¹³C₂H₄ into syngas prior to conversion with a rhodium catalyst have been used to support a surface vinyl mechanism for Fischer–Tropsch synthesis. The results were first interpreted by a mechanism that involved a decrease in ¹³C species on the surface as the carbon number increased. This model is shown to be incorrect. Considering only the ¹³C-labeled products, the data are consistent with earlier tracer studies showing that the added ¹³C₂H₄ initiates chains.