Cobalt titanate: A versatile ilmenite for next-generation energy and catalytic applications

What is it about?

Cobalt titanate (CoTiO3), an ABO3-type ilmenite oxide, has emerged as a promising multifunctional material owing to its Co-O-Ti framework, Co-centered redox activity, visible-light response, robust chemical stability, and tunable physicochemical properties. Despite its potential, current literature lacks a unified assessment of CoTiO3 across its diverse applications. This review addresses this gap by critically integrating recent advances in CoTiO3 synthesis and nanostructure engineering, specifically through defect engineering, morphology control, heterostructure construction, and carbonaceous supports. We critically evaluate the structure–property–performance relationships of CoTiO3-based nanostructures in advanced oxidation processes (AOPs), photocatalytic pollutant degradation, solar-driven reactions, oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reaction (HER), nitrate reduction to ammonia. Furthermore, its performance in supercapacitors, batteries, H2 storage, and sensing applications is discussed. The review highlights how specific modifications enhance charge separation, electron/ion transport, active-site exposure, intermediate adsorption, and catalytic activity. Finally, we propose future research directions, including defect engineering, in situ/operando characterization, density functional theory (DFT)-guided design, Z-/S-scheme heterostructures, and scalable synthesis protocols, to unlock the potential of CoTiO3 in sustainable energy and environmental technologies.

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Photo by Caspar Rae on Unsplash

Photo by Caspar Rae on Unsplash

Why is it important?

Cobalt titanate (CoTiO3), an ABO3-type ilmenite oxide, has emerged as a promising multifunctional material owing to its Co-O-Ti framework, Co-centered redox activity, visible-light response, robust chemical stability, and tunable physicochemical properties. Despite its potential, current literature lacks a unified assessment of CoTiO3 across its diverse applications. This review addresses this gap by critically integrating recent advances in CoTiO3 synthesis and nanostructure engineering, specifically through defect engineering, morphology control, heterostructure construction, and carbonaceous supports. We critically evaluate the structure–property–performance relationships of CoTiO3-based nanostructures in advanced oxidation processes (AOPs), photocatalytic pollutant degradation, solar-driven reactions, oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reaction (HER), nitrate reduction to ammonia. Furthermore, its performance in supercapacitors, batteries, H2 storage, and sensing applications is discussed. The review highlights how specific modifications enhance charge separation, electron/ion transport, active-site exposure, intermediate adsorption, and catalytic activity. Finally, we propose future research directions, including defect engineering, in situ/operando characterization, density functional theory (DFT)-guided design, Z-/S-scheme heterostructures, and scalable synthesis protocols, to unlock the potential of CoTiO3 in sustainable energy and environmental technologies.

Perspectives