Effect of Mechanical Activation on the Electrochemical Behavior of MnO2

Electrochemical behaviour of mechanoactivated β-MnO2 powders has been studied by the method of cyclic voltammetry with a carbon-paste electroactive electrode. Mechanical activation was carried out by dry grinding in an AGO-2 planetary ball mill. It was found that the grinding process results in a mechanochemical effect in the surface layer of the oxide particles: Mn (IV) cations are reduced to Mn (III). Voltammetry test detects that mechanical activation of β-MnO2 leads to a new state, which is characteristic for the γ-modification of manganese dioxide (β-MnO2 γ-MnO2).

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Grinding Behaviour of Aluminum Powder for Al/CNTs Nano Composites Fabrication by Dry Grinding Process Using a High Speed Planetary Ball Mill

Korean Journal of Materials Research ◽

10.3740/mrsk.2013.23.2.89 ◽

2013 ◽

Vol 23 (2) ◽

pp. 89-97 ◽

Cited By ~ 4

Author(s):

Heekyu Choi ◽

Jehyun Lee ◽

Seongsoo Kim ◽

Gyungpil Choi ◽

Daehyung Bae ◽

...

Keyword(s):

Aluminum Powder ◽

Ball Mill ◽

High Speed ◽

Planetary Ball Mill ◽

Nano Composites ◽

Grinding Process ◽

Dry Grinding

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The grinding behavior of ground copper powder for Cu/CNT nanocomposite fabrication by using the dry grinding process with a high-speed planetary ball mill

Journal of the Korean Physical Society ◽

10.3938/jkps.68.147 ◽

2016 ◽

Vol 68 (1) ◽

pp. 147-153 ◽

Cited By ~ 4

Author(s):

Heekyu Choi ◽

Amgalan Bor ◽

Shiori Sakuragi ◽

Jehyun Lee ◽

Hyung-Tae Lim

Keyword(s):

Copper Powder ◽

Ball Mill ◽

High Speed ◽

Planetary Ball Mill ◽

Grinding Process ◽

Dry Grinding

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Discovery of THICZs as Chemical Sensors: Synthesis, Spectrophotometric,Voltammetric and DFT Studies

International Journal of Sensors Wireless Communications and Control ◽

10.2174/2210327909666190710101420 ◽

2019 ◽

Vol 09 ◽

Author(s):

Mardia T. El Sayed ◽

Ibrahim H.I. Habib ◽

Nermien M. Sabry ◽

Sergey A. Pisarev ◽

Mohamed El-Naggar ◽

...

Keyword(s):

Electrochemical Behaviour ◽

Molecular Size ◽

Active Species ◽

Carbon Paste ◽

Reversible Redox ◽

Energy Relationships ◽

Linear Solvation Energy ◽

Solute Interactions ◽

Homo Lumo ◽

Paste Electrode

Absorption spectra of tetrahydro[3,2-b]indolo-carbazoles (THICZs) with various molecular size and alkyl tails have been recorded in various solvents in the range between 200 to 600 nm. The photo physical behaviour of dissolved THICZs depends on the nature of its environment. The solvatochromic behaviours of THICZs and solvent solute interactions can be analysed by means of linear solvation energy relationships concept proposed by Kamlet and Taft. Compound 4 show excellent properties for sensing small molecules. The electrochemical behaviour of some THICZs was investigated at carbon paste electrode where two electrode reactions were involved, irreversible oxidation-one electron transfer and quasi-reversible redox reactions forming phenolic followed by quinolone moiety electro active species. The DFT-calculated molecular orbital energies (B3LYP/6-31G) and HOMO-LUMO gaps for some presented indolocarbazoles have been performed.

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On the electroreduction mechanism of halobenzenes: Detection of intermediates in reduction of monohalobenzenes

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19890900 ◽

1989 ◽

Vol 54 (4) ◽

pp. 900-910 ◽

Cited By ~ 2

Author(s):

Juan Casado ◽

Iluminada Gallardo

Keyword(s):

Cyclic Voltammetry ◽

Electrochemical Behaviour ◽

Experimental Results ◽

Disk Electrode ◽

Rotating Ring Disk Electrode ◽

Mercury Cathode

Experimental results from electrochemical behaviour of halobenzenes in DMF at a mercury cathode are used to discuss alternative mechanisms of reduction. Intermediates of these mechanisms, such as phenyl anion, phenylmercury radical and phenylmercury cation have been detected at the electrode by using cyclic voltammetry and a rotating ring-disk electrode.

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