scholarly journals Green hydrogen from anion exchange membrane water electrolysis: a review of recent developments in critical materials and operating conditions

2020 ◽  
Vol 4 (5) ◽  
pp. 2114-2133 ◽  
Author(s):  
Hamish Andrew Miller ◽  
Karel Bouzek ◽  
Jaromir Hnat ◽  
Stefan Loos ◽  
Christian Immanuel Bernäcker ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Proton Exchange Membrane ◽  
Pure Water ◽  
Water Electrolysis ◽  
Anion Exchange Membrane ◽  
Proton Exchange ◽  
Operating Conditions ◽  
Recent Developments ◽  
Water Feed ◽  
Exchange Membrane

Hydrogen production using water electrolysers equipped with an anion exchange membrane, a pure water feed and cheap components (catalysts and bipolar plates) can challenge proton exchange membrane electrolysis systems as the state of the art.

scholarly journals Overview: State-of-the Art Commercial Membranes for Anion Exchange Membrane Water Electrolysis

2020 ◽  
Vol 18 (2) ◽  
Author(s):  
Dirk Henkensmeier ◽  
Malikah Najibah ◽  
Corinna Harms ◽  
Jan Žitka ◽  
Jaromír Hnát ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Water Electrolysis ◽  
Anion Exchange Membrane ◽  
Proton Exchange ◽  
Operating Conditions ◽  
Alkaline Water Electrolysis ◽  
Chemical Structures ◽  
Technical Requirements ◽  
Target Values ◽  
Exchange Membrane

Abstract One promising way to store and distribute large amounts of renewable energy is water electrolysis, coupled with transport of hydrogen in the gas grid and storage in tanks and caverns. The intermittent availability of renewal energy makes it difficult to integrate it with established alkaline water electrolysis technology. Proton exchange membrane (PEM) water electrolysis (PEMEC) is promising, but limited by the necessity to use expensive platinum and iridium catalysts. The expected solution is anion exchange membrane (AEM) water electrolysis, which combines the use of cheap and abundant catalyst materials with the advantages of PEM water electrolysis, namely, a low foot print, large operational capacity, and fast response to changing operating conditions. The key component for AEM water electrolysis is a cheap, stable, gas tight and highly hydroxide conductive polymeric AEM. Here, we present target values and technical requirements for AEMs, discuss the chemical structures involved and the related degradation pathways, give an overview over the most prominent and promising commercial AEMs (Fumatech Fumasep® FAA3, Tokuyama A201, Ionomr Aemion™, Dioxide materials Sustainion®, and membranes commercialized by Orion Polymer), and review their properties and performances of water electrolyzers using these membranes.

Fabrication of spinel ferrite based alkaline anion exchange membrane water electrolysers for hydrogen production

RSC Advances ◽  
2015 ◽  
Vol 5 (43) ◽  
pp. 34100-34108 ◽  
Author(s):  
T. Pandiarajan ◽  
L. John Berchmans ◽  
S. Ravichandran
Keyword(s):  
Hydrogen Production ◽  
Metal Oxides ◽  
Anion Exchange ◽  
Proton Exchange Membrane ◽  
Spinel Ferrite ◽  
Water Electrolysis ◽  
Anion Exchange Membrane ◽  
Proton Exchange ◽  
Exchange Membrane

Alkaline anion exchange membrane water electrolysis (AEMWE) is considered to be an alternative to proton exchange membrane water electrolysis (PEMWE), owing to the use of non-noble meta/metal oxides in AEMWE.

scholarly journals Effect of Gravity and Various Operating Conditions on Proton Exchange Membrane Water Electrolysis Cell Performance

Membranes ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 822
Author(s):  
Yena Choi ◽  
Woojung Lee ◽  
Youngseung Na
Keyword(s):  
Flow Rate ◽  
Proton Exchange Membrane ◽  
Operating Temperature ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Operating Conditions ◽  
Phase Flow ◽  
Cell Orientation ◽  
Two Phase ◽  
Exchange Membrane

Water electrolysis is an eco-friendly method for the utilization of renewable energy sources which provide intermittent power supply. Proton exchange membrane water electrolysis (PEMWE) has a high efficiency in this regard. However, the two-phase flow of water and oxygen at the anode side causes performance degradation, and various operating conditions affect the performance of PEMWE. In this study, the effects of four control parameters (operating temperature, flow rate, cell orientation, and pattern of the channel) on the performance of PEMWE were investigated. The effects of the operating conditions on its performance were examined using a 25 cm2 single-cell. Evaluation tests were conducted using in situ methods such as polarization curves and electrochemical impedance spectroscopy. The results demonstrated that a high operating temperature and low flow rate reduce the activation and ohmic losses, and thereby enhance the performance of PEMWE. Additionally, the cell orientation affects the performance of PEMWE owing to the variation in the two-phase flow regime. It was observed that the slope of specific sections in the polarization curve rapidly increases at a specific cell voltage.

scholarly journals Alkaline membrane fuel cells: anion exchange membranes and fuels

2021 ◽  
Author(s):  
Maša Hren ◽  
Mojca Božič ◽  
Darinka Fakin ◽  
Karin Stana Kleinschek ◽  
Selestina Gorgieva
Keyword(s):  
Fuel Cells ◽  
Anion Exchange ◽  
Energy Production ◽  
Proton Exchange Membrane ◽  
Anion Exchange Membrane ◽  
Proton Exchange ◽  
Anion Exchange Membranes ◽  
Electrochemical Devices ◽  
Alkaline Membrane ◽  
Exchange Membrane

Alkaline anion exchange membrane fuel cells (AAEMFC) are attracting ever-increasing attention, as they are promising electrochemical devices for energy production, presenting a viable opponent to proton exchange membrane fuel cells (PEMFCs).

Comparative Investigation of Electrocatalytic Oxidation By Proton-Exchange-Membrane and Anion-Exchange-Membrane Electrolyses

2020 ◽  
Vol MA2020-02 (43) ◽  
pp. 2773-2773
Author(s):  
Yuto Ido ◽  
Yutaro Shimizu ◽  
Juri Minoshima ◽  
Atsushi Fukazawa ◽  
Kenta Tanaka ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Electrocatalytic Oxidation ◽  
Proton Exchange Membrane ◽  
Comparative Investigation ◽  
Anion Exchange Membrane ◽  
Proton Exchange ◽  
Exchange Membrane

scholarly journals Highly cost-effective platinum-free anion exchange membrane electrolysis for large scale energy storage and hydrogen production

RSC Advances ◽  
2020 ◽  
Vol 10 (61) ◽  
pp. 37429-37438
Author(s):  
Immanuel Vincent ◽  
Eun-Chong Lee ◽  
Hyung-Man Kim
Keyword(s):  
Anion Exchange ◽  
Large Scale ◽  
Proton Exchange Membrane ◽  
Cost Effective ◽  
Platinum Group Metal ◽  
Anion Exchange Membrane ◽  
Proton Exchange ◽  
Pem Electrolysis ◽  
Alkaline Electrolysis ◽  
Exchange Membrane

Anion exchange membrane (AEM) electrolysis eradicates platinum group metal electrocatalysts and diaphragms and is used in conventional proton exchange membrane (PEM) electrolysis and alkaline electrolysis.

scholarly journals RuO2 Nanorods as an Electrocatalyst for Proton Exchange Membrane Water Electrolysis

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1412
Author(s):  
Michael W. Cross ◽  
Richard P. Smith ◽  
Walter J. Varhue
Keyword(s):  
Proton Exchange Membrane ◽  
Critical Factor ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Mixed Metal Oxide ◽  
Anode Catalyst ◽  
Water Feed ◽  
Electron Escape ◽  
Pem Electrolyzer ◽  
Exchange Membrane

A custom-built PEM electrolyzer cell was assembled using 6” stainless-steel ConFlat flanges which were fitted with a RuO2 nanorod-decorated, mixed metal oxide (MMO) ribbon mesh anode catalyst. The current density–voltage characteristics were measured for the RuO2 nanorod electrocatalyst while under constant water feed operation. The electrocatalytic behavior was investigated by making a series of physical modifications to the anode catalyst material. These experiments showed an improved activity due to the RuO2 nanorod electrocatalyst, resulting in a corresponding decrease in the electrochemical overpotential. These overpotentials were identified by collecting experimental data from various electrolyzer cell configurations, resulting in an improved understanding of the enhanced catalytic behavior. The micro-to-nano surface structure of the anode electrocatalyst layer is a critical factor determining the overall operation of the PEM electrolyzer. The improvement was determined to be due to the lowering of the potential barrier to electron escape in an electric field generated in the vicinity of a nanorod.

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