Highly Reversible Water Oxidation at Ordered Nanoporous Iridium Electrodes Based on an Original Atomic Layer Deposition

Journal article
(Original article)


Publication Details

Author(s): Schlicht S, Haschke S, Mikhailovskii V, Manshina A, Bachmann J
Journal: ChemElectroChem
Publisher: WILEY-V C H VERLAG GMBH
Publication year: 2018
Volume: 5
Journal issue: 9
Pages range: 1259-1264
ISSN: 2196-0216


Abstract

Nanoporous iridium electrodes are prepared and electrochemically investigated towards the water oxidation (oxygen evolution) reaction. The preparation is based on 'anodic' aluminum oxide templates, which provide straight, cylindrical nanopores. Their walls are coated using atomic layer deposition (ALD) with a newly developed reaction which results in a metallic iridium layer. The ALD film growth is quantified by spectroscopic ellipsometry and X-ray reflectometry. The morphology and composition of the electrodes are characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. Their catalytic activity is quantified for various pore geometries by cyclic voltammetry, steady-state electrolysis, and electrochemical impedance spectroscopy. With an optimal pore length of L approximate to 17-20 mu m, we achieve current densities of J = 0.28 mA cm(-2) at pH 5 and J = 2 .4 mA cm(-2) at pH 1. This platform is particularly competitive for achieving moderate current densities at very low overpotentials, that is, for a high degree of reversibility in energy storage.


FAU Authors / FAU Editors

Bachmann, Julien Prof.
Lehrstuhl für Chemistry of thin film materials
Haschke, Sandra
Lehrstuhl für Chemistry of thin film materials
Schlicht, Stefanie
Lehrstuhl für Chemistry of thin film materials


External institutions with authors

Saint Petersburg State University (SPbU) / Санкт-Петербургский государственный университет (СПбГУ)


How to cite

APA:
Schlicht, S., Haschke, S., Mikhailovskii, V., Manshina, A., & Bachmann, J. (2018). Highly Reversible Water Oxidation at Ordered Nanoporous Iridium Electrodes Based on an Original Atomic Layer Deposition. ChemElectroChem, 5(9), 1259-1264. https://dx.doi.org/10.1002/celc.201800152

MLA:
Schlicht, Stefanie, et al. "Highly Reversible Water Oxidation at Ordered Nanoporous Iridium Electrodes Based on an Original Atomic Layer Deposition." ChemElectroChem 5.9 (2018): 1259-1264.

BibTeX: 

Last updated on 2019-04-02 at 15:08

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