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. 2020 Jun 10;11:2940. doi: 10.1038/s41467-020-16769-6

Fig. 1. Microstructures and chemical properties.

Fig. 1

a Typical cross-sectional SEM image of Co3Mo/Cu electrode prepared by chemically dealloying Cu8Co3Mo1Al88 alloy precursor, displaying a three-dimensional bicontinuous and bimodal nanoporous architecture. Scale bar, 200 nm. b High-resolution cross-sectional SEM image of Co3Mo/Cu electrodes with a number of intermetallic Co3Mo nanoparticles in-situ integrated on Cu ligaments. Scale bar, 100 nm. c STEM image and the corresponding STEM-EDS elemental mappings of Cu, Co and Mo, demonstrating the Co3Mo nanoparticles grown on Cu ligaments. Scale bar, 10 nm. d Atomic resolution HAADF-STEM image of intermetallic Co3Mo nanoparticles grown on Cu ligament with a coherent interface structure. Inset: atomic structure of intermetallic Co3Mo. Scale bar, 1 nm. e, f FFT patterns of Co3Mo (e) and Cu (f) in the selected areas in (d). g XRD patterns of nanoporous Co3Mo/Cu hybrid electrode and bare nanoporous Cu electrode. The line patterns show reference cards 04-0836 and 29-0488 for Cu and Co3Mo phases according to JCPDS, respectively.