A Novel Thermocell System Using Proton Solvation Entropy.The entropy change associated with proton-coupled electron transfer (PCET) reactions significantly enhance the Seebeck coefficient (Se ) of thermocells.  A redox pair of [Ru(Hx im)6 ]2+/3+ (Him=imidazole, x=0≈1) releases three protons in their one-electron redox reactions in thermocells, which gave a remarkably high Se of -3.7 mV K-1 as confirmed by temperature-dependent square wave voltammetry.  This result demonstrates the utility of PCET reaction toward efficient thermoelectric conversion.
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