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Optimized structures of H2O2 on (a) Pt-SWCNT, (b) Pd-SWCNT, (c) Ni-SWCNT, (d) Cu-SWCNT, (e) Rh-SWCNT, and (f) Ru-SWCNT systems. The bond lengths, the diameters, and the binding distances between the metal atom and the nanotube are also given in the unit of Å. The sticks between atoms are only for visualization. The red and black dotted arrows present the diameter of the nanotube parallel and perpendicular orientation to the axis of the nanotube, respectively.
