Issue 4, 2012

Photoelectrochemical water splitting over ordered honeycomb hematite electrodes stabilized by alumina shielding

Abstract

Highly ordered, honeycomb-like iron oxide (hematite) films were fabricated by double-step anodic oxidation of iron foil. The honeycomb structure obtained by double step anodization was found to be more effective in producing a large area film with homogeneous pore distribution compared to nanotubes fabricated by the conventional single-step anodic oxidation process. To prevent agglomeration of the hematite film during the annealing process, a thin alumina layer was deposited on the hematite film surface by atomic layer deposition. With this alumina shielding and subsequent removal by alkaline treatment, one-dimensional (1-D) hematite nanostructure was preserved perfectly after annealing at 550 °C. This highly ordered 1-D nanostructure film showed much enhanced photoelectrochemical cell performances relative to hematite films with low degrees of ordering.

Graphical abstract: Photoelectrochemical water splitting over ordered honeycomb hematite electrodes stabilized by alumina shielding

Supplementary files

Article information

Article type
Paper
Submitted
31 Aug 2011
Accepted
19 Oct 2011
First published
14 Nov 2011

Energy Environ. Sci., 2012,5, 6375-6382

Photoelectrochemical water splitting over ordered honeycomb hematite electrodes stabilized by alumina shielding

H. Jun, B. Im, J. Y. Kim, Y. Im, J. Jang, E. S. Kim, J. Y. Kim, H. J. Kang, S. J. Hong and J. S. Lee, Energy Environ. Sci., 2012, 5, 6375 DOI: 10.1039/C1EE02526K

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