Issue 8, 2016

Facile growth of porous Fe2V4O13 films for photoelectrochemical water oxidation

Abstract

Porous n-type Fe2V4O13 films on FTO substrates were prepared by a simplified successive ion layer adsorption and reaction method and characterized as photoelectrodes for photoelectrochemical (PEC) water oxidation. Synthesis parameters such as film thickness and annealing temperatures and durations were investigated to optimize the PEC performance. A band gap of ∼2.3 eV and a flat band potential of 0.5 V vs. RHE make Fe2V4O13 a promising photoanode material. Water oxidation was kinetically limited at the surface of Fe2V4O13 film as confirmed by tests in electrolyte with a hole scavenger (Na2SO3). Improved PEC performance was achieved by Mo and W doping because of enhanced carrier densities. The best performance was obtained by 2.5% W-doped Fe2V4O13 films (actual 0.8% W-doped), which efficiently oxidize water to O2via photogenerated holes as confirmed by oxygen evolution measurements. Moreover, the Fe2V4O13 photoanode displayed very stable photocurrent under illumination. Due to the suitable band gap and valence band position, Fe2V4O13 is a promising photoanode for solar water splitting. Co-catalyst loading and doping optimization are identified as routes to improve this material's performance further.

Graphical abstract: Facile growth of porous Fe2V4O13 films for photoelectrochemical water oxidation

Supplementary files

Article information

Article type
Paper
Submitted
17 ذو الحجة 1436
Accepted
20 محرم 1437
First published
20 محرم 1437

J. Mater. Chem. A, 2016,4, 3034-3042

Facile growth of porous Fe2V4O13 films for photoelectrochemical water oxidation

D. Tang, A. J. E. Rettie, O. Mabayoje, B. R. Wygant, Y. Lai, Y. Liu and C. B. Mullins, J. Mater. Chem. A, 2016, 4, 3034 DOI: 10.1039/C5TA07877F

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