Issue 40, 2019

Electrochemical interfacing of Prussian blue nanocrystals with an ITO electrode modified with a thin film containing a Ru complex

Abstract

Prussian blue (PB) is a well-known porous metal–organic framework (MOF) material, whose redox chemistry on indium-tin oxide (ITO) electrodes has been studied extensively. However, the molecular interfacing of PB nanocrystals has not yet been explored in such detail. In this study, electrochemical interfacing of PB nanocrystals with a thin film containing a redox-active Ru complex (Ru-NP) was investigated. Spontaneous growth of preferentially oriented PB nanocrystals was observed on an ITO electrode modified with a Ru-NP primer film, which was subsequently characterized by UV-Vis-NIR spectroscopy, scanning electron microscopy (SEM), and X-ray diffraction (XRD) analysis. Blocking and rectification of electron transport (ET) were observed between PB and the Ru complex, and this behavior was governed by the energy gap between the Ru complex and PB nanocrystals as well as the thickness of the Ru-containing primer layer film. ET rectification at the ITO‖(Ru-NP)3/PB heterojunction was supported by a potential-step chronoamperometry (PSCA) analysis of the it curves. Owing to the large difference between the forward and backward ET rates at the ITO‖(Ru-NP)3/PB heterojunction, a large hysteresis loop was observed during electrochemical quartz crystal microbalance (EQCM) measurements, indicating dynamic ion transfer gating in the PB nanopores through the rectified electron transport between the Ru-NP layer and the ITO electrode at the ITO‖(Ru-NP)3/PB heterojunction.

Graphical abstract: Electrochemical interfacing of Prussian blue nanocrystals with an ITO electrode modified with a thin film containing a Ru complex

Supplementary files

Article information

Article type
Paper
Submitted
31 Jul 2019
Accepted
13 Sep 2019
First published
13 Sep 2019

J. Mater. Chem. C, 2019,7, 12491-12501

Electrochemical interfacing of Prussian blue nanocrystals with an ITO electrode modified with a thin film containing a Ru complex

H. Sato, M. Ide, R. Saito, T. Togashi, K. Kanaizuka, M. Kurihara, H. Nishihara, H. Ozawa and M. Haga, J. Mater. Chem. C, 2019, 7, 12491 DOI: 10.1039/C9TC04192C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements