Effect of H2S on the performance of La0.7Ce0.2FeO3 perovskite catalyst for high temperature water-gas shift reaction

► This work investigates the effect of sulphur on the performance of a La0.7Ce0.2FeO3 perovskite catalyst on the HT-WGS reaction. ► The negative effect of H2S on the activity of La0.7Ce0.2FeO3 perovskite catalyst found to be reversible. ► La0.7Ce0.2FeO3 perovskite catalyst has a high degree of H2S tolerance particularly in the low H2S concentration regime.