Figure 2

(a) XRD results for CNTs and the CNTs@MnOx and CNTs@MnO composites; (b) XPS results for the CNTs@MnOx and CNTs@MnO composites.
(a) XRD results for CNTs and the CNTs@MnOx and CNTs@MnO composites; (b) XPS results for the CNTs@MnOx and CNTs@MnO composites.