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  • Water-hydroxide trapping in cobalt tungstate for proton exchange membrane water electrolysis

    • Water-hydroxide trapping in cobalt tungstate for proton exchange membrane water electrolysis

    Title Water-hydroxide trapping in cobalt tungstate for proton exchange membrane water electrolysis
    Authors Ranit Ram, Lu Xia, Hind Benzidi, Anku Guha, Viktoria Golovanova, Alba Garzón Manjón, David Llorens Rauret, Pol Sanz Berman, Marinos Dimitropoulos, Bernat Mundet, Ernest Pastor, Veronica Celorrio, Camilo A. Mesa, Aparna M. Das, Adrián Pinilla-Sánchez, Sixto Giménez, Jordi Arbiol, Núria López, F. Pelayo García de Arquer
    Magazine Science
    Date 06/21/2024
    DOI 10.1126/science.adk9849
    Introduction The oxygen evolution reaction (OER) presents a critical challenge for achieving energy-efficient water-based electrolysis, which is essential for the generation of hydrogen and other solar fuels. In proton exchange membrane water electrolysis (PEMWE), the use of precious metals has typically been required for stable catalysis of this reaction. This work demonstrates that the delamination of cobalt tungstate significantly boosts activity and durability by stabilising oxide and water-hydroxide networks within lattice defects in an acidic environment. The resulting catalysts achieve reduced overpotentials, reaching a current density of 1.8 amperes per square centimetre at 2 volts. They also maintain stable operation up to 1 ampere per square centimetre in a PEMWE system under industrial conditions (80°C) at 1.77 volts, representing a threefold improvement in activity and sustained operation at 1 ampere per square centimetre for over 600 hours.
    Quote Ranit Ram, Lu Xia and Hind Benzidi et al. Water-hydroxide trapping in cobalt tungstate for proton exchange membrane water electrolysis. Science. 2024. Vol. 384(6702):1373-1380. DOI: 10.1126/science.adk9849
    Element Cobalt (Co) , Tungsten (W) , Oxygen (O) , Hydrogen (H) , Platinum (Pt) , Iridium (Ir)
    Industry Energy Storage & Batteries , Fuel Cells , Chemical Manufacturing , Research & Laboratory
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