Highly quaternized polystyrene ionomers for high performance anion exchange membrane water electrolysers

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

“…For example, some recent studies suggest that phenyl groups adsorbed on the catalyst surface get oxidized to phenols, which (because of the phenols' acidity) reduces the number of hydroxide ions. The solution would be phenyl group-free materials [19,20]. In direct contact with platinum catalysts, also the oxidation of organic cationic groups could be an issue [21].…”

“…7. One recently reported AEM water electrolyzer using con-commercial membranes and ionomers, water as feed and NiFe/PtRu as catalyst reached 2.7 A cm −2 at 1.8 V [19]. However, this system was optimized for performance, and the authors caution that the durability needs to be improved.…”

Novel Electrocatalyst for Alkaline Membrane Water Electrolysis

“…[3] Alkaline water electrolysis is preferred to PEMWE because of the availability of low-cost membranes or diaphragms as separators and non-noble electrocatalyst. [4] However, in alkaline water electrolysis, the use of thick diaphragm as separators results in relatively higher ohmic resistance in the cell. [5] Besides, an alkaline electrolyte is highly corrosive and sensitive to CO 2 to form insoluble K 2 CO 3 .…”

“…Alkaline anion exchange membrane water electrolysis (AAEMWE) uses solid polymer electrolytes and offers several advantages compared to conventional alkaline water electrolysis. [4] Recently, the problems with low ionic conductivity and poor chemical stability of AEMs are systematically addressed. [6][7][8][9][10][11] However, the slow reaction kinetics of oxygen evolution reaction (OER) in AAEMWE reduces the rate and amount of H 2 production.…”

“…[6][7][8][9][10][11] However, the slow reaction kinetics of oxygen evolution reaction (OER) in AAEMWE reduces the rate and amount of H 2 production. [3,4] A schematic illustration of AAEMWE cell operation is provided below ( Figure 1A).…”