The linear sweep voltammograms for the methanol oxidation on the LSCO surface in different methanol concentrations were carried out to obtain the optimal concentration of methanol. For electrocatalytic MOR, the current density increases on increasing the concentration of methanol, their respective percent increment in current density is shown in Figure . This study suggests the excellent electron transfer properties of perovskite material or the methanol electrooxidation process is mass-transfer-controlled up to 0.5 M of methanol concentration. It is well known that concentrated methanol solution is a target fuel in the DMFCs to reduce the volume. Increasing of methanol concentration can also have a negative influence on the current density , which means that the catalytic activity only increases up to a certain methanol concentration and tends to decrease after that optimum concentration. However, in our study there is no negative influence on the current density by LSCO perovskite but the increment almost levels off after 0.5 M concentration of CH3OH. We speculated that it could be due to the saturation of active sites at the catalyst surface. Hence, we have performed all our studies in 0.5 M methanol contained alkaline medium in accordance with the result obtained by concentration dependent studies.