The invention discloses a LaCeNiO
perovskite catalyst with an ultra-wide Ni (111)
crystal face as well as a preparation method and application of the LaCeNiO
perovskite catalyst. The preparation method comprises the following steps: by taking water as a
solvent,
citric acid as a chelating agent, La and Ce as carrier metals and
metal Ni as an active
metal,
drying, screening, calcining and reducing by adopting a
sol-
gel method to obtain the LaCeNiO
perovskite catalyst. The LaCeNiO perovskite catalyst is characterized in that the size of Ni particles reaches 10-25 nm, the
crystal face of Ni (111) reaches 10 nm, the proportion of
oxygen vacancies reaches 20-30%, the specific surface area of the catalyst is 12-38 m < 2 > / g, the average pore size is 5-13 nm, and the total pore volume is 0.03-0.08 cm < 3 > / g. The catalyst is low in Ni loading capacity and simple to prepare, and when the catalyst is applied to a CO2
methanation reaction, the highest CO2 conversion rate can reach 57.4 mmol CO2 / mol Ni / s, and the
methane selectivity reaches 99.8%. Compared with a conventional commercial Ni / gamma-Al2O3 catalyst, the catalyst has excellent catalyst activity, stability and regeneration performance for dynamic
gas supply and high
water vapor atmosphere.