Fig. 1: Crystal structure of fresh Sr2RuO4 single crystals.
From: Observation of a robust and active catalyst for hydrogen evolution under high current densities
a Three-dimensional crystal structure of layered SRO crystal. The light purple, pink, and gray balls represent Sr, Ru, and O atoms, respectively. b Laue diffraction pattern of the SRO crystal recording along the [100] direction. A photograph of the exfoliated SRO single crystal by exposing the (001) surface. c TEM image of the fresh SRO crystal recorded on a FIB laminar. The bright atoms represent the alternatively arranged Sr element along the c direction. d XPS spectrum of the SRO catalysts taken at Sr 3p. The peak can be fitted well with lattice and surface Sr components. e Comparison of the room temperature conductivities between SRO single crystal and reported state-of-the-art HER catalysts. The error bar in conductivity of the activated SRO crystal is based on three independent measurements.
