Pseudo-capacitance related with reversible hydrogen

Pseudo-capacitance Related with Reversible Hydrogen Electrosorption in Nanoporous Carbons . 

To summarize, in comparison to acidic and basic electrolytes, a neutral medium has two positive impacts for supercapacitor applications (1) the overpotential for dihydrogen evolution is higher, allowing the stability window to be enlarged (2) the amount of hydrogen reversibly sorbed is enhanced enabling a higher pseudo-capacitive contribution related with its oxidation. 

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