Ni-exsolved La1-xCaxNiO3 perovskites for improving CO2 methanation

This work investigates the promoting effect of Ca on CO2 hydrogenation to methane in the highly exsolved Ni particles of La1-xCaxNiO3 perovskite catalysts. TEM images presented that metallic Ni particles are exsolved to the surface under a reducing atmosphere. This exsolution behavior is observed until the Ca ratio (x) becomes 0.4, suggesting that the highly dispersed Ni particles formed by the exsolution can actively adsorb and dissociate H2...