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  An alkaline water electrolyzer with nickel electrodes enables efficient high current density operation

Schalenbach, M., Kasian, O., & Mayrhofer, K. J. J. (2018). An alkaline water electrolyzer with nickel electrodes enables efficient high current density operation. International Journal of Hydrogen Energy, 43(27), 11932-11938. doi:10.1016/j.ijhydene.2018.04.219.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-E5F5-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-E5F6-7
Genre: Journal Article

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 Creators:
Schalenbach, Maximilian1, Author              
Kasian, Olga1, Author              
Mayrhofer, Karl Johann Jakob1, 2, 3, Author              
Affiliations:
1Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              
2Helmholtz-Institute Erlangen-Nuremberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Egerlandstrasse 3, 91058 Erlangen, Germany, ou_persistent22              
3Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany, ou_persistent22              

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Free keywords: Dealloying; Diaphragms; Electrocatalysts; Electrodes; Electrolysis; Electrolytic cells; Nickel; Proton exchange membrane fuel cells (PEMFC); Solid electrolytes; Temperature, Alkaline electrolytes; Alkaline water electrolysis; Cell design; High current densities; High surface area electrodes; Hot dip galvanization; Industrial water; Voltage-current characteristics, Polyelectrolytes
 Abstract: Low-temperature industrial water electrolysis is typically conducted using either liquid alkaline electrolytes or acidic polymer electrolyte membranes (PEMs). The latter approach is considered to be more efficient but also more expensive as it requires Pt and Ir based catalysts. This study reports on an alkaline water electrolyzer with Ni electrodes that operates at a current density of 2 A/cm2 with a cell voltage of 1.85 V, which provides a comparable voltage-current characteristic to the state-of-the-art PEM water electrolyzers. Thin Ni mesh electrodes with surface areas that are thousand times higher than the geometric area were manufactured by an easily scalable and cheap process, i.e. metallurgical hot dip galvanization with subsequent de-alloying. With a thin porous polymer of approximately 140μm as the diaphragm a low cell resistance of 0.11 Ω cm−2 was obtained. © 2018 Hydrogen Energy Publications LLC

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Language(s): eng - English
 Dates: 2018-07-05
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.ijhydene.2018.04.219
BibTex Citekey: Schalenbach201811932
 Degree: -

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Title: International Journal of Hydrogen Energy
  Other : Int. J. Hydrogen Energy
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 43 (27) Sequence Number: - Start / End Page: 11932 - 11938 Identifier: ISSN: 0360-3199
CoNE: /journals/resource/954925521672