A Novel Thermocell System Using Proton Solvation Entropy. Issue 13 (15th December 2020)

• Record Type: Journal Article
• Authors: Kobayashi, Takashi; Yamada, Teppei; Tadokoro, Makoto; Kimizuka, Nobuo
• Is Part Of: Chemistry. Volume 27:Issue 13(2021)
• Page Start: 4287
• Page End: 4290
• Publication Date: 2020-12-15
• Subjects: electron transfer -- thermocell -- thermoelectric conversion; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202004562
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: The entropy change associated with proton‐coupled electron transfer (PCET) reactions significantly enhance the Seebeck coefficient ( S e ) of thermocells. A redox pair of [Ru(H x 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 S e of −3.7 mV K −1 as confirmed by temperature‐dependent square wave voltammetry. The value of S e is proportional to the redox reaction entropy (Δ S rc ), which increased with the number of dissociating protons. This result demonstrates the utility of PCET reaction toward efficient thermoelectric conversion. Abstract : Large redox entropy of proton‐coupled electron transfer reaction was utilized for thermoelectric energy conversion.