Thin‐Walled Carbon Nanocages: Direct Growth, Characterization, and Applications

Carbon nanocages with one or a few graphitic layers (see figure) are directly grown in the solid state by heat treatment of a carbon–iron mixture at low temperature. Such thin-walled nanocages have a fine size of 3–12 nm and a high surface area of 535 m2 g–1. They are are a superb catalyst support for low-temperature fuel cells and could be applicable in many other fields.