Structural Modification of Graphene Sheets to Create
a Dense Network of Defect Sites
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Abstract
Pt/graphene
composites were synthesized by loading platinum nanoparticles
onto graphene and etched at 1000 °C in a hydrogen atmosphere.
This results in the formation of a dense array of nanostructured defect
sites in the graphene, including trenches, nanoribbons, islands, and
holes. These defect sites result in an increase in the number of unsaturated
carbon atoms and, consequently, enhance the interaction of the CO<sub>2</sub> molecules with the etched graphene. This leads to a high
capacity for storing CO<sub>2</sub>; 1 g of the etched samples can
store up to 76.3 cm<sup>3</sup> of CO<sub>2</sub> at 273 K under ambient
pressure