Stable Pentagonal Layered Palladium Diselenide Enables Rapid Electrosynthesis of Hydrogen Peroxide.

Electrosynthesis of hydrogen peroxide (HO) via the two-electron oxygen reduction reaction (2e ORR) is promising for various practical applications, such as wastewater treatment. However, few electrocatalysts are active and selective for 2e ORR yet are also resistant to catalyst leaching under realistic operating conditions. Here, a joint experimental and computational study reveals active and stable 2e ORR catalysis in neutral media over layered PdSe with a unique pentagonal puckered ring structure type.