My son is researching something for school along these lines. If we could stop even for a millisecond a proton's path, if thats even possible, the applications would be huge.
The possiblitiy to study other electrochemical systems with heterogeneous electrodes.
http://prl.aps.org/abstract/PRL/v111/i16/e168301
Imaging the Proton Concentration and Mapping the Spatial Distribution of the Electric Field of Catalytic Micropumps