Development and testing of an anion exchange membrane electrolyser

Manolova, Mila; Schoeberl, Claudia; Freudenberger, Renate; Ellwein, Corina; Kerres, Jochen; Stypka, Sebastian; Oberschachtsiek, Bernd

doi:10.1016/j.ijhydene.2015.04.149

Cited by 13 publications

(12 citation statements)

References 28 publications

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“…It must be considered that for implementation into a commercial system, ideally catalysts should be grown on the electrodes themselves such as Ni foam or stainless steel, however these results indicate that natural materials show interesting properties and indeed face the same challenge of stable adherence to electrodes as their synthetically prepared counterparts. Perhaps fabricating membrane electrode assemblies for utilisation in the next generation of anion exchange membrane electrolysers is the most appropriate way forward for this type of material. To understand the origin of the activity of this material a detailed structural and chemical analysis was undertaken.…”

Section: Resultsmentioning

confidence: 99%

Harnessing Native Iron Ore as an Efficient Electrocatalyst for Overall Water Splitting

2019

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Electrochemical water splitting is a widely accepted approach to generate hydrogen at a scale that is suitable for storing renewable energy. Therefore, the choice of catalyst for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are critical in terms of cost when scaling up this technology. Thus, earth abundant transition metals oxides and sulfides have received significant attention as catalysts for the OER and HER, respectively. However, very few examples of actual Earth abundant materials mined from the Earth's crust have been used as electrocatalysts for these reactions. Here, we demonstrate that a raw iron ore is active for both the HER and OER under alkaline conditions, which is due to the natural abundance of the key elements of iron, nickel, and sulfur. The catalyst is stable for both reactions and can operate at 100 mA cm À 2 , which is comparable to many chemically synthesised nanomaterials based on these elements. This approach may be attractive for adding value to iron ore while minimising the cost of catalyst production.[a] Dr.

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Section: Resultsmentioning

confidence: 99%

Harnessing Native Iron Ore as an Efficient Electrocatalyst for Overall Water Splitting

2019

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“…Thus, the performance of an AEM electrolyser depends on three factors: ohmic resistance, kinetic resistance and mass transfer resistance 26 , 27 . These are sources of overall polarization losses, and they can be separated, and quantified, by the electrochemical impedance spectroscopy (EIS) characterization technique.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive impedance investigation of low-cost anion exchange membrane electrolysis for large-scale hydrogen production

Vincent

Lee

Kim

2021

Sci Rep

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Anion exchange membrane (AEM) electrolysis is a promising solution for large-scale hydrogen production from renewable energy resources. However, the performance of AEM electrolysis is still lower than what can be achieved with conventional technologies. The performance of AEM electrolysis is limited by integral components of the membrane electrode assembly and the reaction kinetics, which can be measured by ohmic and charge transfer resistances. We here investigate and then quantify the contributions of the ohmic and charge transfer resistances, and the rate-determining steps, involved in AEM electrolysis by using electrochemical impedance spectroscopy analysis. The factors that have an effect on the performance, such as voltage, flow rate, temperature and concentration, were studied at 1.5 and 1.9 V. Increased voltage, flow rate, temperature and concentration of the electrolyte strongly enhanced the anodic activity. We observed that here the anodic reaction offered a greater contribution to the overpotential than the cathode did.

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“…For most of the hydrogen technologies used in the calculations, other technologies are being developed which are likely to be more energy efficient and/or cost effective. Examples are high temperature solid oxide or proton conducting electrolyzers [152,231], alkaline membrane [232][233][234] electrolyzers and direct solar to hydrogen technologies replacing solar panels and electrolyzers [235][236][237][238][239][240]. Ionic liquid piston compressors [241] and electrochemical hydrogen compression and purification [242,243] could replace compressors and purification systems.…”

Section: Technology Synergy Effects and Developmentmentioning

confidence: 99%

Fuel cell electric vehicle as a power plant: Fully renewable integrated transport and energy system design and analysis for smart city areas

Oldenbroek

Verhoef

Wijk

2017

International Journal of Hydrogen Energy

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Development and testing of an anion exchange membrane electrolyser

Cited by 13 publications

References 28 publications

Harnessing Native Iron Ore as an Efficient Electrocatalyst for Overall Water Splitting

Harnessing Native Iron Ore as an Efficient Electrocatalyst for Overall Water Splitting

Comprehensive impedance investigation of low-cost anion exchange membrane electrolysis for large-scale hydrogen production

Fuel cell electric vehicle as a power plant: Fully renewable integrated transport and energy system design and analysis for smart city areas

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