Synthesis and Electrochemical Characterization of Mesoporous MnO₂

Figure 3

Adsorption and desorption isotherms of the samples of blank and MMO- ( = 1–6). The isotherms of MMO-4, MMO-5, and MMO-6 were offset vertically by 25, 35, and 55 cm³ g⁻¹ STP.