Perovskite Oxides under OER: The Impact of Internal Composition and External Triggers on Restructuring and Catalysis

The purpose of this review is to examine the impacts of internal composition and external triggers on the restructuring of perovskite oxides under OER, and how this affects catalysis. While we will not provide a comprehensive overview of surface reconstruction phenomenon, we will focus on the examples of SrIrO3, Ba0.5Sr0.5Co0.8Fe0.2O3-δ, and other related perovskite oxides over the past decade.

In section 1, we will briefly introduce the OER mechanism, including the conventional adsorbate evolution mechanism (AEM) and lattice oxygen mechanism (LOM). Section 2 will summarize the properties of perovskite oxides and their applications in catalyzing OER. We will then highlight the importance of operando measurements in section 3, as we discuss the various characterization tools available for OER.

In section 4, we will review the effects of inherent compositions and external triggers of surface reconstruction. Finally, we will summarize proposed active structures and present limitations of characterization methods on the OER mechanism in this field. We will conclude with an outlook on potential future directions.