Engineering Nanoporous Iron(III) Oxide into an Effective Water Oxidation Electrode
Haschke S, Wu Y, Bashouti M, Christiansen S, Bachmann J (2015)
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2015
Journal
Publisher: Wiley-VCH Verlag
Book Volume: 7
Pages Range: 2455-2459
Abstract
The geometric effects of nanostructuring a pure Fe2O3 surface on its electrochemical water oxidation performance at neutral pH were systematically explored. Atomic layer deposition was used to coat the inner walls of cylindrical "anodic" nanopores ordered in parallel arrays with a homogeneous Fe2O3 layer. Annealing and electrochemical treatments generated a roughened surface, as demonstrated by X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy, the larger geometric area of which increases current densities. Combining these treatments with the "anodic" pore geometry delivered an effective increase in turnover by almost three orders of magnitude with respect to a smooth, planar Fe2O3 surface. However, the current density depended on the pore length in a non-monotonic manner. An optimal length was found that maximized turnover by equating the rate of transport in the electrolyte with that of charge transfer across the interface.
Authors with CRIS profile
Sandra Haschke
Professur für Anorganische Chemie
Yanlin Wu
Lehrstuhl für Anorganische und Allgemeine Chemie
Julien Bachmann
Lehrstuhl für Chemistry of thin film materials
Additional Organisation(s)
Involved external institutions
Germany (DE)How to cite
APA:
Haschke, S., Wu, Y., Bashouti, M., Christiansen, S., & Bachmann, J. (2015). Engineering Nanoporous Iron(III) Oxide into an Effective Water Oxidation Electrode. ChemCatChem, 7, 2455-2459. https://doi.org/10.1002/cctc.201500623
MLA:
Haschke, Sandra, et al. "Engineering Nanoporous Iron(III) Oxide into an Effective Water Oxidation Electrode." ChemCatChem 7 (2015): 2455-2459.
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