Electrochemical oxidation of Mn/MnO films: formation of an electrochemical capacitor

A comparative study of sequentially layer-deposited and co-deposited Co–Mn oxides as potential redox capacitors

“…These peaks are indexed as (102) and (110) [17]. The XRD pattern corresponds to the well-known form of hexagonal crystalline Co (OH) 2 [18]. Previously reported XRD patterns of Co (OH) 2 prepared by precipitation methods, show stronger (00ℓ) reflections compared to other reflections which is not the case in Fig.…”

“…Figure 6 shows typical CVs of (CM) electrodes in 2 M NaOH electrolyte at different scan rates. The potential window of (CM) is around 0.7 V that it is considerably wider compared to Co (OH) 2 [18] and cobalt oxide samples prepared by other methods [14,[25][26][27] but it is narrower than the potential window of MnOOH. Therefore, it is found that cobalt hydroxide presence in (CM) is a limiting agent in the width of the potential window.…”

“…2a. This is due to the nanosize of α-Co (OH) 2 layers along the basal planes, which results in loss of intensity of the (00ℓ) reflections [18]. The XRD pattern for MnOOH is seen in Fig.…”

Synthesis of ultrathin and compact Au@MnO2 nanoparticles for shell‐isolated nanoparticle‐enhanced Raman spectroscopy (SHINERS)

“…3(b) and (c) that there are three peaks located at about 529.8, 531.6, and 532.5 eV, corresponding to O 1s binding energy in the anhydrous compounds (Mn-O-Mn), hydrated manganese (Mn-O-H), and free water (H-O-H), respectively. [40] The ratio of hydrated manganese (Mn-O-H) of 55 nm Au@1.2 nm MnO 2 synthesized at high pH is larger than that at low pH, since the reaction at high pH favors the formation of the hydroxide species. Considering the shell property of the 55 nm Au@1.2 nm MnO 2 synthesized at the high pH, the relatively large amount of hydrated manganese must play an important role in the compactness of the MnO 2 .…”

A Kinetic Study of Oxalic Acid Electrochemical Oxidation on a Manganese Dioxide Rotating Cylinder Anode

“…These oxides display excellent electrocatalytic properties, low cost, availability, environmental compatibility and chemical stability [6,7]. Electrodes based on manganese oxide thin films may be obtained by different methods, such as sol-gel [10], physical vapor deposition [11], electrostatic spray deposition [12], electrochemical deposition [13], and chemical bath deposition [14,15]. The low costs of equipment and the accurate control of the deposited thickness make the electrodeposition method very widely used in manganese dioxide synthesis [13].…”