Fischer-Tropsch (FT) catalysts offer a route to the production of fuels and chemicals from synthesis gas, which has a number of sources. This reaction is likely to play a key role in the future as oil becomes less available. The catalyst itself evolves over time, with increasing deposition of carbon. The rate determining step in the reaction is the transport of hydrogen to the active site, through the carbon deposits. We wish to measure the diffusion rate of hydrogen to the active site using QENS on a model FT catalyst that has previously been used. This will represent the first attempt to measure diffusion to the active site of a non-zeolitic catalyst.