A Novel Thermocell System Using Proton Solvation Entropy

Takashi Kobayashi; Teppei Yamada; Makoto Tadokoro; Nobuo Kimizuka

doi:10.1002/chem.202004562

A Novel Thermocell System Using Proton Solvation Entropy

Takashi Kobayashi
, Teppei Yamada
, Makoto Tadokoro
, Nobuo Kimizuka

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

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_xim)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 (ΔS_rc), which increased with the number of dissociating protons. This result demonstrates the utility of PCET reaction toward efficient thermoelectric conversion.

Original language	English
Pages (from-to)	4287-4290
Number of pages	4
Journal	Chemistry - A European Journal
Volume	27
Issue number	13
DOIs	https://doi.org/10.1002/chem.202004562
Publication status	Published - 1 Mar 2021

Keywords

electron transfer
thermocell
thermoelectric conversion

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10.1002/chem.202004562

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title = "A Novel Thermocell System Using Proton Solvation Entropy",

abstract = "The entropy change associated with proton-coupled electron transfer (PCET) reactions significantly enhance the Seebeck coefficient (Se) of thermocells. A redox pair of [Ru(Hxim)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. The value of Se is proportional to the redox reaction entropy (ΔSrc), which increased with the number of dissociating protons. This result demonstrates the utility of PCET reaction toward efficient thermoelectric conversion.",

keywords = "electron transfer, thermocell, thermoelectric conversion",

author = "Takashi Kobayashi and Teppei Yamada and Makoto Tadokoro and Nobuo Kimizuka",

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year = "2021",

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T1 - A Novel Thermocell System Using Proton Solvation Entropy

AU - Kobayashi, Takashi

AU - Yamada, Teppei

AU - Tadokoro, Makoto

AU - Kimizuka, Nobuo

PY - 2021/3/1

Y1 - 2021/3/1

N2 - The entropy change associated with proton-coupled electron transfer (PCET) reactions significantly enhance the Seebeck coefficient (Se) of thermocells. A redox pair of [Ru(Hxim)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. The value of Se is proportional to the redox reaction entropy (ΔSrc), which increased with the number of dissociating protons. This result demonstrates the utility of PCET reaction toward efficient thermoelectric conversion.

AB - The entropy change associated with proton-coupled electron transfer (PCET) reactions significantly enhance the Seebeck coefficient (Se) of thermocells. A redox pair of [Ru(Hxim)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. The value of Se is proportional to the redox reaction entropy (ΔSrc), which increased with the number of dissociating protons. This result demonstrates the utility of PCET reaction toward efficient thermoelectric conversion.

KW - electron transfer

KW - thermocell

KW - thermoelectric conversion

UR - https://www.scopus.com/pages/publications/85101789339

U2 - 10.1002/chem.202004562

DO - 10.1002/chem.202004562

M3 - Article

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AN - SCOPUS:85101789339

SN - 0947-6539

VL - 27

SP - 4287

EP - 4290

JO - Chemistry - A European Journal

JF - Chemistry - A European Journal

IS - 13

ER -

A Novel Thermocell System Using Proton Solvation Entropy

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