Molybdenum- and vanadium-containing perovskite electrocatalysts for dissociation of H2S

Catalytic operations, achieving considerable energy savings, continue getting wider application especially in clean energy systems. Perovskite materials, owing to their chemical and thermal stability, can be conveniently used as catalysts and electrode materials at wide temperature ranges. Hydrogen sulfide (H₂S) offers a new and abundant source of hydrogen, the ultimate energy carrier. In the present work, change in electrical conductivity of catalysts obtained by adding molybdenum (Mo) and vanadium (V) as B to the perovskite structure with lanthanum (La) and strontium (Sr) as A and A′, respectively, has been studied within a temperature range of up to 1100 K. Samples La_0.75Sr_0.25MoO₃ and LaSr_0.5V_0.5O₃ demonstrated the highest values of conductivity at 1100 K. At lower temperatures, Cr-added Mo and V catalysts La_0.9Sr_0.1Cr_0.5Mo_0.5O₃ and La_0.9Sr_0.1Cr_0.5V_0.5O₃ had higher conductivity, closely followed by LaSr_0.5V_0.5O₃.