Extended light absorption and enhanced photoelectrochemical activity of palladium‐decorated hematite nanotubes prepared by photodeposition method‏

Extended light absorption and enhanced photoelectrochemical activity of palladium‐decorated hematite nanotubes prepared by photodeposition method‏

Mohamad Mohsen Momeni, Akbar Hallaj, Yousef Ghayeb, Robabeh Bagheri, Zhenlun Song, Hossein Farrokhpour

https://doi.org/10.1002/aoc.5087

Abstract

Palladium particles were deposited on hematite nanotube surfaces via a facile photodeposition method. Anodization method was then used for direct vertical growth of hematite nanotube arrays (HNTs) on a pretreated iron substrate. Field emission scanning electron microscopy, X-ray diffraction, diffraction reflection spectroscopy and X-ray photoelectron spectroscopy analyses were then used to carry out morphological and structural investigations. Compared with the bare HNTs, Pd-decorated hematite films (Pd/HNTs) exhibit intense visible light absorption and show a red shift of the band edge. Pd/HNTs are more photoelectrochemically active than the non-decorated films, according to chronoamperometry measurements. Thus, a promising methodology has been developed for the design of a simple and effective photoelectrode for application in photoelectrochemical water splitting systems.

Applied Organometallic Chemistry

https://onlinelibrary.wiley.com/doi/abs/10.1002/aoc.5087