Double Perovskites in Catalysis, Electrocatalysis, and Photo(electro)catalysis

Double perovskites expand the chemical and structural space of the perovskite family, and have emerged as promising alternatives with improved catalytic performance. Double perovskites provide useful options for catalyzing high-temperature redox reactions in solid oxide cells with improvement in electrical conductivity, chemical stability, and catalytic activity. Double perovskites are highly attractive for developing active and stable electrocatalysts in acids and bases for oxygen evolution reaction, oxygen reduction reaction, and hydrogen evolution reaction. Double perovskites have the potential to allow tunable bandgaps and band-edge positions for photo(electro)chemical conversions such as water splitting and CO2 reduction. Double perovskites are attractive catalysts for the activation of peroxymonosulfate to generate reactive oxygen species for advanced oxidation processes (AOPs). A sustainable future requires clean energy and environmental technologies. At the heart of these technologies are high-performance catalysts that efficiently increase the rate and selectivity of key chemical reactions involved. Single perovskites have long been considered as a class of active catalysts with a relatively simple atomic arrangement. Double perovskites, a subclass of perovskites characterized by cation ordering, are emerging alternatives to single perovskites showing comparable or even better performance. In this review, we explore recent developments of double perovskites in various catalytic applications including general catalysis, electrocatalysis, and photo(electro)catalysis. We also discuss how double perovskite chemistries can be tailored toward improved functionality and identify opportunities for the future research of double perovskite catalysts. A sustainable future requires clean energy and environmental technologies. At the heart of these technologies are high-performance catalysts that efficiently increase the rate and selectivity of key chemical reactions involved. Single perovskites have long been considered as a class of active catalysts with a relatively simple atomic arrangement. Double perovskites, a subclass of perovskites characterized by cation ordering, are emerging alternatives to single perovskites showing comparable or even better performance. In this review, we explore recent developments of double perovskites in various catalytic applications including general catalysis, electrocatalysis, and photo(electro)catalysis. We also discuss how double perovskite chemistries can be tailored toward improved functionality and identify opportunities for the future research of double perovskite catalysts. a standard term used in the field of solid oxide fuel cells to describe the resistances associated with the electrode, including those at the electrode–electrolyte interface, within the bulk of the electrode, and at the gas–electrode interface. Generally, the lower the ASR, the better the electrode performance. the build-up of carbon caused by the incomplete oxidation and/or cracking of hydrocarbon fuels. an organic compound with a chemical formula of C4H8O2. It can be used as a solvent for CO2 photoreduction due to the higher solubility of CO2 in ethyl acetate than in water. activity normalized to the catalyst surface area, a term often used to describe the inherent activity of perovskite catalysts in electrochemical catalysis under ambient conditions. Ni composited with an electrolyte material after high-temperature sintering. degradation of cell performance associated with the reaction/interaction of Ni with sulfur impurities in readily available hydrocarbon fuels. a term often used in heterogeneous catalysis to characterize the activity of a catalyst. It is defined as the number of the reactant converted into the desired product per active atom per unit time. The larger the turnover frequency, the higher the catalyst activity.