Highly Reversible Water Oxidation at Ordered Nanoporous Iridium Electrodes Based on an Original Atomic Layer Deposition
Schlicht S, Haschke S, Mikhailovskii V, Manshina A, Bachmann J (2018)
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2018
Journal
Publisher: WILEY-V C H VERLAG GMBH
Book Volume: 5
Pages Range: 1259-1264
Journal Issue: 9
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.
Authors with CRIS profile
Stefanie Schlicht
Lehrstuhl für Chemistry of thin film materials
Sandra Haschke
Lehrstuhl für Chemistry of thin film materials
Julien Bachmann
Lehrstuhl für Chemistry of thin film materials
Involved external institutions
Russian Federation (RU)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.
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