(470a) High-Temperature Electrolysis over Perovskites : The Role of Exsolution of Metal Nano-Particles

Perovskite oxides are known to have many properties that can easily be tuned by changing the A- and B-site doping. This ease of tunability opens up many applications for them as high-temperature electrocatalysts, in many reactions ranging from CO₂ and H₂O reduction to oxidative dehydrogenation. Another characteristic of the perovskites is their ability to exsolve B-site atoms to the surface in the form of metal or alloy nano-particles. Exsolution can take place upon exposure to high temperatures at reducing environments or by application of an electrical bias. Examples from our studies where exsolution of metal nano-particles was found to change the electrocatalytic behavior will be discussed.