Perovskite compound, a catalyst comprising the same, and an electrochemical device comprising the same

Abstract

A perovskite compound having a cubic perovskite structure, high catalytic activity in oxygen reduction and evolution reactions, and excellent durability is provided. The perovskite compound is represented by the following Chemical Formula 1: (AaA′1-a)α(BbB′1-b)βO3-δ  (Chemical Formula 1) in Chemical Formula 1 A is Ba, A′ is one or more selected from the group consisting of lanthanoid elements, Ag, Ca, and Sr, B is Co. B′ is one or more selected from the group consisting of Ta, Nb, V, Sc, Y, Mo, W, Zr, Hf, and Ce, a is a real number greater than 0.9 and 1 or less, b is a real number greater than 0.5 and less than 0.9. α and β real numbers of 0.9 to 1.1. The perovskite compound can be used as a catalyst of electrochemical devices, particularly as a fuel cell catalyst.

Dependencies are inferred from the claim text.