Recent content by angela2007

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    Why Does MnO2 Deposit at Positive Potentials in a Three-Electrode System?

    my question is in three electrode system: working electrode, Pt counter electrode, and Ag/AgCl reference electrode. for example, Mn2+ + 2 H2O -MnO2 + 4 H+ + 2 e− ( −1.22 V), the deposition of Mno2 will be accomplished on positive potential. Cr3+ +3e- Cr ( −0.74 V), the depsotion of metallic Cr...
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    Why Is MnO2 Deposited at Positive Potentials in Electrochemical Reactions?

    my question is in three electrode system: working electrode, Pt counter electrode, and Ag/AgCl reference electrode. for example, Mn2+ + 2 H2O -MnO2 + 4 H+ + 2 e− ( −1.22 V), the deposition of Mno2 will be accomplished on positive potential. Cr3+ +3e- Cr ( −0.74 V), the depsotion of metallic...
  3. A

    Why Is MnO2 Deposited at Positive Potentials in Electrochemical Reactions?

    Mn2+ + 2 H2O - MnO2 + 4 H+ + 2 e− ( −1.22 V), this reaction is acucurate. the standard potential is negative, then why all the work for the formation of MnO2 need to be done in anodic potential?