Perovskite Catalysts for Biomass Valorization

Abstract

Biomass is a widely used renewable energy source, whose uptake is growing due to concerns about the impact of anthropogenic fossil fuel combustion on climate change. Waste biomass-derived fuels and chemicals offer a partial solution to reducing global reliance on fossil fuels in pursuit of Net Zero 2050 CO2 emissions, in concert with environmental, health, and economic benefits. Biorefineries aim to convert biomass resources such as forestry and agricultural waste into diverse product streams, akin to the processing of nonrenewable fossil fuels by petrochemical refineries. However, realizing this ambition requires design of hydrothermally stable catalysts with tunable redox properties and acid–base character to promote molecular deoxygenation or the interconversion of oxygen functionalities. Perovskite oxides of general formula ABO3 (where A = rare or alkaline earth cations and B = transition metal cations) exhibit structural flexibility and diverse surface chemistry; ∼90% of all metals can be introduced to perovskite oxides. Here, we review recent developments in the use of perovskite oxide catalysts for biomass valorization, focusing on structure–reactivity relationships in hydroprocessing, oxidation, steam reforming, and acid–base reactions. Prospects and challenges for the broader application of perovskite oxide catalysts to biomass valorization are also highlighted.

The ex situ exsolved Ni–Ru alloy from nickel–ruthenium co-doped SrFeO3−δ perovskite as a potential catalyst for CC and CO hydrogenation

“…7 Their high thermal and hydrothermal stability, high oxygen mobility, and controllable physicochemical properties enable them to be explored as potential materials for catalytic applications, in particular biomass transformation. 8 Although considerable work was focused on their redox characteristics, catalytic application based on acid-base properties along with their redox potential is a subject of study. Our literature survey reveals that they have proven to be highly effective in selective oxidation, catalytic combustion of volatile organic compounds, oxidative reforming of hydrocarbons, and decomposition reactions.…”

Oxygen Vacancy-Induced Interfacial Lanthanum Hydride and Hydroxide Bifunctional Sites for Selective Hydrogenolysis of Furanic Compounds to Alkyl Diols

“…Perovskite (ABO 3 ) is a versatile mixed oxide with tunable compositions . Controlled reduction of perovskites offers tremendous opportunities to adjust the oxidation state of A and B metal species and tailor surface properties to meet on-demand requirements in specific applications . At present, perovskites as platform materials have been widely used in the field of catalysis, especially in catalytic hydrogenations.…”

Exploring the Optical, Thermoelectric and Dynamic Properties of AReO3 Perovskite Compounds (A = Cs, Rb, Tl): A DFT and MD Study

“…Perovskite oxides are widely used as catalysts in various chemical reactions due to their excellent redox properties, thermal stability, and tunable surface properties. They are employed in applications such as automotive catalytic converters, where they help reduce harmful emissions by catalyzing the oxidation of carbon monoxide and hydrocarbons and the reduction of nitrogen oxides [16][17]. Perovskites also play a role in environmental remediation.…”