Perovskite oxides for electrochemical small-molecule oxidation: advances and mechanisms

Abstract

As global demand for sustainable energy grows, developing efficient and eco-friendly energy conversion and utilization technologies has become a key research focus. In this context, the electrocatalytic oxidation of small molecules has attracted significant attention due to its potential to produce hydrogen and valuable chemicals simultaneously with lower energy consumption. Owing to their structural adjustability and excellent catalytic properties, perovskite oxides have become highly promising catalysts for small-molecule oxidation. This review summarizes the recent advances in the application of perovskite oxides to the electro-oxidation of alcohols, urea, and nitrogen, with a focus on the relationship between structure and catalytic performance. The effects of A-site/B-site cation regulation, valence tuning, and oxygen vacancies and the interplay between defect chemistry and electronic conductivity are examined. Additionally, the distinct features and mechanisms of different small-molecule oxidation reactions are analyzed. This review aims to provide a theoretical guidance for designing high-performance electrocatalysts, enhance the understanding of perovskite oxide catalysis, and promote their practical use in energy conversion systems.