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

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Highly Reversible Water Oxidation at Ordered Nanoporous Iridium Electrodes Based on an Original Atomic Layer Deposition. / Schlicht, Stefanie; Haschke, Sandra; Mikhailovskii, Vladimir; Manshina, Alina ; Bachmann, Julien.

In: ChemElectroChem, Vol. 5, No. 9, 01.05.2018, p. 1259-1264.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{afbbc4b81ed84bdeadf2206a115f9335,

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

abstract = "Nanoporous iridium electrodes are prepared and electrochemically investigated towards the water oxidation (oxygen evolution) reaction. The preparation is based on {\textquoteleft}anodic{\textquoteright} 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≈17–20 μm, 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.",

keywords = "catalysis, Electrochemistry, nanostructures, thin films, water splitting, SUBSTRATE-TEMPERATURE, STABILITY, PLATINUM, ELECTROLYZERS, CATALYST, RESISTIVITY, ADSORPTION, ELECTROCATALYSTS, OXYGEN EVOLUTION REACTION, OXIDE THIN-FILMS",

author = "Stefanie Schlicht and Sandra Haschke and Vladimir Mikhailovskii and Alina Manshina and Julien Bachmann",

year = "2018",

month = may,

day = "1",

doi = "10.1002/celc.201800152",

language = "English",

volume = "5",

pages = "1259--1264",

journal = "ChemElectroChem",

issn = "2196-0216",

publisher = "Wiley-Blackwell",

number = "9",

}

RIS

TY - JOUR

T1 - Highly Reversible Water Oxidation at Ordered Nanoporous Iridium Electrodes Based on an Original Atomic Layer Deposition

AU - Schlicht, Stefanie

AU - Haschke, Sandra

AU - Mikhailovskii, Vladimir

AU - Manshina, Alina

AU - Bachmann, Julien

PY - 2018/5/1

Y1 - 2018/5/1

N2 - 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≈17–20 μm, 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.

AB - 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≈17–20 μm, 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.

KW - catalysis

KW - Electrochemistry

KW - nanostructures

KW - thin films

KW - water splitting

KW - SUBSTRATE-TEMPERATURE

KW - STABILITY

KW - PLATINUM

KW - ELECTROLYZERS

KW - CATALYST

KW - RESISTIVITY

KW - ADSORPTION

KW - ELECTROCATALYSTS

KW - OXYGEN EVOLUTION REACTION

KW - OXIDE THIN-FILMS

UR - http://www.scopus.com/inward/record.url?scp=85042523115&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/highly-reversible-water-oxidation-ordered-nanoporous-iridium-electrodes-based-original-atomic-layer

U2 - 10.1002/celc.201800152

DO - 10.1002/celc.201800152

M3 - Article

AN - SCOPUS:85042523115

VL - 5

SP - 1259

EP - 1264

JO - ChemElectroChem

JF - ChemElectroChem

SN - 2196-0216

IS - 9

ER -

ID: 32528880