Extended Data Fig. 6: Structural evolutions of 4H-Au@4H-IrPtNiFeCo catalyst after the acidic HER and OER.
From: Synthesis of 4H-phase high-entropy alloys for electrocatalysis

Schematic illustrations and the corresponding STEM images of the structural evolutions of 4H-Au@4H-IrPtNiFeCo catalyst under acidic HER and OER conditions at 100 and 1,000 mA cm−2 in a PEMWE.