Fig. 4
From: Unusual synergistic effect in layered Ruddlesden−Popper oxide enables ultrafast hydrogen evolution
Electrochemical activation of Sr2RuO4 by ADT. a Polarization curves of Sr2RuO4 catalyst initially, as well as after 5 and 1000 cycles. b Linear fitting curves of the capacitive currents versus CV scan rates for Sr2RuO4 and ADT-Sr2RuO4. c XRD patterns of Sr2RuO4 and ADT-Sr2RuO4 loaded on the carbon paper substrate. Insert is the magnified XRD patterns showing main peaks of Sr2RuO4 and ADT-Sr2RuO4. d Ru-L2,3 XAS spectra of Sr2RuO4 and ADT-Sr2RuO4. Insert is the magnified Ru-L3 spectra of Sr2RuO4 and ADT-Sr2RuO4. e HAADF-STEM image and the corresponding EDX elemental mapping of ADT-Sr2RuO4. f EDX spectra at the position in points 1 and 2 in (e)
