Popular Chemistry Online: STANDARD HYDROGEN ELECTRODE (SHE)

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Sunday, January 2, 2022

STANDARD HYDROGEN ELECTRODE (SHE)

 ü  It is reference electrode consists of a platinum electrode(Pt wire fitted in glass tube) in contact with H2 gas (1 atm) and aqueous H+ ions (1 M).

ü  It is assigned 0.0 V electrode potential.

ü  It may behave as anodic or cathodic half cell.

ü  It is represented as

          Pt(s)|H2(g)(aH2= 1)|H+(aq)(aH+ = 1).

   ü  When SHE is coupled with an other  half cell then cell potential is the value of the electrode potential of half cell.

        










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