Pseudobrookite Based Heterostructures for Efficient Electrocatalytic Hydrogen Evolution

Abstract Synthesis of ultrathin heterostructures has received much attention in the recent past due to their unique physical and chemical properties. In this work, we report the synthesis of Fe2TiO5–TiO2 heterostructures using a simple hydrothermal technique employing natural ilmenite as the source. Hierarchically arranged nanostructures with interconnected nano-petals of thickness around 50 ​nm are obtained. The electrocatalytic properties of the synthesized Fe2TiO5–TiO2 heterostructures are enhanced following the cathodization technique. The observed enhancement in the synthesized materials’ electrocatalytic property can be attributed to the defect-rich Fe2-xTiO5-x-TiO2-x heterostructures. The current approach and technique discussed in this work offer a simple method to synthesize a nanostructured heterostructure material and create defects for enhancing electrocatalytic activity.