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

The oxygen evolution reaction is the bottleneck to energy-efficient water-based electrolysis for the production of hydrogen and other solar fuels. In proton exchange membrane water electrolysis (PEMWE), precious metals have generally been necessary for the stable catalysis of this reaction. In this...

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Vydáno v:Science (American Association for the Advancement of Science) Ročník 384; číslo 6702; s. 1373
Hlavní autoři: Ram, Ranit, Xia, Lu, Benzidi, Hind, Guha, Anku, Golovanova, Viktoria, Garzón Manjón, Alba, Llorens Rauret, David, Sanz Berman, Pol, Dimitropoulos, Marinos, Mundet, Bernat, Pastor, Ernest, Celorrio, Veronica, Mesa, Camilo A, Das, Aparna M, Pinilla-Sánchez, Adrián, Giménez, Sixto, Arbiol, Jordi, López, Núria, García de Arquer, F Pelayo
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States 21.06.2024
ISSN:1095-9203, 1095-9203
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Shrnutí:The oxygen evolution reaction is the bottleneck to energy-efficient water-based electrolysis for the production of hydrogen and other solar fuels. In proton exchange membrane water electrolysis (PEMWE), precious metals have generally been necessary for the stable catalysis of this reaction. In this work, we report that delamination of cobalt tungstate enables high activity and durability through the stabilization of oxide and water-hydroxide networks of the lattice defects in acid. The resulting catalysts achieve lower overpotentials, a current density of 1.8 amperes per square centimeter at 2 volts, and stable operation up to 1 ampere per square centimeter in a PEMWE system at industrial conditions (80°C) at 1.77 volts; a threefold improvement in activity; and stable operation at 1 ampere per square centimeter over the course of 600 hours.
Bibliografie:ObjectType-Article-1
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ISSN:1095-9203
1095-9203
DOI:10.1126/science.adk9849