Novel alkaline water electrolysis with nickel-iron gas diffusion electrode for oxygen evolution |
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| Affiliation: | 1. Institute of Chemical and Electrochemical Process Engineering, Clausthal University of Technology, Leibnizstr. 17, D-38678, Clausthal-Zellerfeld, Germany;2. Research Center Energy Storage Technologies, Clausthal University of Technology, EnergieCampus, Am Stollen 19A, 38640, Goslar, Germany;1. National Research University “Moscow Power Engineering Institute”, Moscow, Russia;2. National Research Centre “Kurchatov Institute”, Moscow, Russia;3. Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), UMR CNRS 8182, Université Paris-Sud, Orsay, France;1. National Research University “Moscow Power Engineering Institute”, 14, Krasnokazarmennaya str., 111250, Moscow, Russia;2. Institut de Chimie Moléculaire et des Matériaux, UMR CNRS n° 8182, Université Paris Sud 11, bat 410, 91405, Orsay Cedex, France;3. National Research Centre “Kurchatov Institute”, 1, Kurchatov sq., 123182 Moscow Russia;1. CSGI and Dipartimento di Ingegneria dell''Università di Bergamo, Facoltà di Ingegneria, Viale Marconi 5, 24044 Dalmine, Italy;2. Department of Chemical Engineering and Technology, KTH, 100 44 Stockholm, Sweden;3. Dipartimento di Chimica Industriale dell''Università di Bologna, Viale del Risorgimento 4, 40196 Bologna, Italy;1. Department of Electrical and Computer Engineering, Ajou University, Youngtong-gu, Suwon 443-749, Republic of Korea;2. Pahps Inc., 85 LS-ro, Dongan-gu, Anyang 431-080, Republic of Korea;3. Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea;4. Light Bridge, Inc., 107 Gwanggyo-ro, Youngtong-gu, Suwon 443-270, Republic of Korea;1. Department of Chemical Engineering, Aragon Nanoscience Institute (INA), University of Zaragoza, C/ Poeta Mariano Esquillor S/N, 50018 Zaragoza, Spain;2. Departamento de Física de la Materia Condensada, University of Zaragoza, 50009 Zaragoza, Spain;3. Acciona Energía S.A., Avenida Ciudad de la Innovación, 5, E-31621 Sarriguren, Navarra, Spain;4. Ingeteam Power Technology S.A., Avda. Ciudad de la Innovación, 13, E-31621 Sarriguren, Navarra, Spain;1. Intelligent Polymer Research Institute, University of Wollongong, Wollongong, NSW 2522, Australia;2. ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW 2522, Australia |
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| Abstract: | In the present work, a novel electrolyzer concept for alkaline water electrolysis (AEL) with a gas diffusion electrode (GDE) as anode, a conventional immersed porous cathode and a state-of-the-art Zirfon™ separator is presented and compared with a conventional electrolyzer setup. Due to the utilization of a GDE in this configuration, the electrolyte is only circulated through the cathode compartment which greatly simplifies the process. The influence of the catalyst composition and the enhanced electrode surface owing to the three-dimensional porous structure of the GDE are characterized and investigated regarding the electrode performance. Furthermore, process parameters like contact pressure and differential pressure are examined and optimized. The novel process concept with a GDE as anode reveals a similar cell potential compared to a classical electrolysis cell with a Ni/Fe-coated nickel foam anode up to 400 mA cm−2 at 353 K and 32.5 wt% KOH and also exhibits relatively good electrochemical stability over time. |
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| Keywords: | Alkaline water electrolysis Oxygen evolution reaction Anode Gas diffusion electrode Nickel-iron catalyst |
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