electrochemical cell problem - when to use platinum?

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pondering-soul
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why is a platinum electrode used if there is a conductive surface for the 2nd equation?it goes in the forward direction, as it is more positive (or less negative) E so the reactants would be Li+ (aq) and MnO2(s) MnO2 is a solid, so why is it not used as the electrode?can only pure metals be used as electrodes?
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thanks for any help in advance, I appreciate it
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charco
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(Original post by pondering-soul)
why is a platinum electrode used if there is a conductive surface for the 2nd equation?it goes in the forward direction, as it is more positive (or less negative) E so the reactants would be Li+ (aq) and MnO2(s) MnO2 is a solid, so why is it not used as the electrode?can only pure metals be used as electrodes?
Image

thanks for any help in advance, I appreciate it
Yes, you need a metal to conduct the electrons
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