The Au/La-CeOx catalysts were prepared and tested for the PROX reaction. The effects of the support preparation method, Au loading, calcination temperature, oxygen pretreatment on the catalytic activity, and the stability test were investigated. It was found that the catalyst preparation could affect the surface area, gold particle size, and the state of gold, which are strongly related to the catalytic activity. The results indicated that the La-CeOx prepared by the NH4OH precipitation method have high activity and thermal stability. Under the stability test, the catalyst was stable, even though water was added in the feed stream up to 10%. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.