Fig. 2: Synthesis and characterization of Ni-CMC aerogel and Ni-CNTs/PC. | Nature Communications

Fig. 2: Synthesis and characterization of Ni-CMC aerogel and Ni-CNTs/PC.

From: Nutrient diffusion-inspired catalysts with self-reinforced concentration gradient for sustainable electroreduction of dilute CO2

Fig. 2

a Schematic for the preparation of hierarchical Ni-CNTs/PC. b Schematic for synthesizing Ni-CMC hydrogel through the sol-gel strategy followed by swelling treatment. c Top-view SEM images and d HRTEM image of Ni-CNTs30/PC (the white circle in d refers to the location of the etched Ni particle). e Aberration-corrected HAADF-STEM image of Ni-CNTs. f EDS elemental mappings of C, N, and Ni. g Schematic for the tip-growth mode of Ni-CNTs. h Swelling ratio of Ni-CMC hydrogel and Ni nanoparticles (NPs) size versus swelling time. i The thickness of PC NSs and the length of Ni-CNTs in Ni-CNTs/PC versus growth time. Error bars represent the standard deviation of three independent measurements. Source data are provided as a Source Data file.

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