Fig. 1
From: Atomically dispersed nickel as coke-resistant active sites for methane dry reforming

Electron microscopy images and size distribution of Ni/HAP-Ce samples. a HAADF-STEM images of 0.5Ni1/HAP-Ce, b 2Ni1/HAP-Ce, and c 10Ni/HAP-Ce samples after 500 °C H2 reduction. d particle size distributions of a–c; yellow circles indicate atomically dispersed Ni and red squares indicate Ni metals nanoparticles. e EDX element maps of 0.5Ni1/HAP-Ce