For example, Pt is used in the following half-cells:
Hydrogen electrode:  Pt(s)|H2(g)| H+(aq)
With half-cell reaction:  H+ (aq)+ e– ® ½ H2(g)
Bromine electrode: Pt(s)|Br2(aq)| Br–(aq)
Rationalised 2023-24
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Chemistry
With half-cell reaction: ½ Br2(aq) + e– ® Br–(aq)
The standard electrode potentials are very important and we can
extract a lot of useful information from them The values of standard
electrode potentials for some selected half-cell reduction reactions are
given in Table 2 1 If the standard electrode potential of an electrode
is greater than zero then its reduced form is more stable compared to
hydrogen gas