Method for producing an electrode catalyst from a perovskite metal oxide
AssigneeUniversity Court of the University of St Andrews
InventorsJohn T. S. Irvine, Jae-Ha Myung, Dragos Neagu, David Miller
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Abstract
The invention relates to a method of producing electrode materials for solid oxide cells which comprises applying an electric potential to a metal oxide which has a perovskite crystal structure. The resultant electrode catalyst exhibits excellent electrochemical performance. The invention extends to the electrode catalyst itself, and to electrodes and solid oxide cells comprising the electrode catalyst.
Claims16
A method of producing an electrode catalyst comprising:
- applying an electric potential to a perovskite metal oxide lattice;
- causing one or more metals from the perovskite metal oxide lattice to exsolve while applying the electric potential;
- and
- forming metal particles of the one or more metals on a surface of the perovskite metal oxide lattice.
A method of of producing an electrode catalyst comprising:
- applying an electric potential to a perovskite metal oxide lattice;
- causing one or more metals from the perovskite metal oxide lattice to exsolve while applying the electric potential;
- and
- forming metal particles of the one or more metals on a surface of the perovskite metal oxide lattice, wherein the perovskite metal oxide lattice has the formula:
- (M1x1M2x2)(M3yM4zM5aM6b)O3-δ
- wherein
- M1 is a rare earth metal,
- M2 is calcium,
- M3, M4, M5 and M6 are each independently Al or a transition metal, and M3 is
- different from at least one of M4, M5 and M6,
- 0≤x1+x2≤1,
- 0<y≤1,
- 0<z≤1,
- 0≤a≤1,
- 0≤b≤1,
- y+z+a+b=1, and
- 0≤γ≤0.1.
A method of producing an electrode catalyst comprising:
- applying an electric potential to a perovskite metal oxide lattice;
- causing one or more metals from the perovskite metal oxide lattice to exsolve while applying the electric potential;
- and
- forming metal particles of the one or more metals on a surface of the perovskite metal oxide lattice;
- wherein the perovskite metal oxide has the formula:
- (M1x1M2x2)(M3yM4zM5aM6b)O3-δ
- wherein
- M1 is a rare earth metal,
- M2 is an alkaline earth metal,
- M3, M4, M5 and M6 are each independently aluminum (Al) or a transition metal,
- and M3 is different from at least one of M4, M5 and M6,
- 0≤x1+x2≤1,
- 0<y≤1,
- 0<z≤1,
- 0≤a≤1,
- 0≤b≤1,
- y+z+a+b=1, and
- 0≤γ≤0.1.
Dependencies are inferred from the claim text.