Extended Data Figure 2: Electron microscopy characterization.
From: Low-temperature hydrogen production from water and methanol using Pt/α-MoC catalysts
a, Low-magnification STEM Z-contrast image of 2% Pt/α-MoC. b, Corresponding fast Fourier transform (FFT) pattern of the image, showing that the α-MoC substrate has a fcc structure and is imaged along the 
zone axis. The red dashed lines illustrate the {111} planes. The polycrystalline substrate is highly textured. c, Electron energy-loss spectrum (EELS) acquired from a 16 × 16 nm2 region of the α-MoC substrate, showing the presence of a very small amount of oxygen and the strong molybdenum and carbon signals. d, STEM bright-field image of 0.2%Pt/α-MoC catalyst. e, Corresponding FFT pattern. The α-MoC support has a porous appearance, with highly textured nanocrystals of 2–6 nm in size. This textured structure shows a strong tendency to align along the {111} direction (as shown in the FFT pattern)—that is, the nanocrystals have strong tendency to expose the {111} surfaces.
