Recent Advances in Perovskite Oxides Electrocatalysts: Ordered Perovskites, Cations Segregation and Exsolution

Abstract

Perovskite oxides have been widely confirmed as a promising alternative to precious metals as catalysts for a wide range of environmental protection, energy storage, and conversion devices for their prominent intrinsic electrocatalytic activity, flexible structure, low cost, and easy synthesis. Since its discovery in 1839, perovskite oxide has been the subject of a considerable amount of systematic research in several exploring aspects (e. g., materials synthesis, component regulation, and catalytic properties). The above‐mentioned findings have been extensively reviewed and consolidated in numerous publications. The heterogeneous catalytic performance of perovskite oxides has been significantly affected by their surface composition, electronic structure, and defect chemistry. This study places a focus on the crystal structure and structure regulation of ordered perovskite oxides. Moreover, the recent research progress in areas (e. g., perovskite surface element segregation, law of exsolution, and the mechanism of exsolution) is systematically reviewed. Furthermore, this study highlights potential future directions for the development of perovskite oxides.

Structure‐property Relationship of Double Perovskite Oxide towards Trifunctional Electrocatalytic Activity: Strategy for Designing and Development

“…To overcome this difficulty, researchers have explored a variety of techniques to increase the catalytic activity of DP oxides as well as their surface porosity [67–71] . In this regard, fabricating of DP materials in the form of nanoparticles, introduction of porosity into DP oxides by using different methods like sol‐gel, chemical etching, incorporation of composite materials mainly carbon‐based materials and their various allotropes make possible to adjust and improve the electrocatalytic performance [67–71] . The above strategies can modify the surface area, active site accessibility, mass transport and charge transport characteristics.…”

“…To date, many interesting reviews based on perovskite oxides have been screened focusing bifunctional role of perovskite compounds towards electrochemical water splitting but there is still lack of development for trifunctional electrocatalytic activities specifically for DP oxide materials [67–71] . In this context, firstly we briefly discuss about the structure, classification and composition of DP oxides.…”

Metal exsolution from perovskite-based anodes in solid oxide fuel cells

“…Reported intrinsic factors include A-site defects, oxygen vacancies, lattice strain, crystallographic orientation, B-site defects, and phase transitions, while external factors include oxygen partial pressure, temperature, reduction time, and electrochemical driving, among others. 38–41 Considering the current need for additional comprehensive reviews on intrinsic factors influencing perovskite exsolution, especially for extensively reported factors such as A-site defects, oxygen vacancies, lattice strain, and phase transitions, these could serve as effective entry points for understanding the structure–performance relationship and exploring exsolution mechanisms.…”

Ammonolysis‐Driven Exsolution of Ru Nanoparticle Embedded in Conductive Metal Nitride Matrix to Boost Electrocatalyst Activity

“…[5,11,12] Recently, exsolved metal nanoparticles-based hybrid materials have been utilized as electrocatalysts. [13,14] To further enhance the electrocatalytic activity of these hybrids, controlling the electrical conductivity of the exsolution substrate is supposed to be crucial. [15] This is because metal oxide substrates have a low electrical conductivity, detrimentally affecting the electrocatalytic performance of the immobilized metal nanoparticles.…”