Figure 3

FESEM images of a FZHN plate (inset shows typical surface morphology of a ZHN sample) (a), the CG carbon derived from FZHG nanohybrid (b) and the FCNG carbon catalyst at different magnifications (c–f).

FESEM images of a FZHN plate (inset shows typical surface morphology of a ZHN sample) (a), the CG carbon derived from FZHG nanohybrid (b) and the FCNG carbon catalyst at different magnifications (c–f).