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Molecules, volume 27, issue 17, pages 5638

Hydrogen-Chlorate Electric Power Source: Feasibility of the Device, Discharge Characteristics and Modes of Operation

Konev Dmitry V ^{1, 2}

Istakova Olga I ²

Ruban Evgeny A. ^{1, 2}

Glazkov Artem T ¹

Vorotyntsev M. A. ¹

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Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow 119071, Russia |

Institute for Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka 142432, Russia |

Publication type: Journal Article

Publication date: 2022-09-01

Multidisciplinary Digital Publishing Institute (MDPI)

Journal: Molecules

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Impact factor: 4.6

ISSN: 14203049

DOI: 10.3390/molecules27175638

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PubMed ID: 36080404

Organic Chemistry

Drug Discovery

Physical and Theoretical Chemistry

Pharmaceutical Science

Molecular Medicine

Analytical Chemistry

Chemistry (miscellaneous)

Abstract

A power source based on the current-generating reaction of aqueous chlorate-to-chloride reduction by molecular hydrogen would provide as much as 1150 Wh per 1 L of reagent storage (for a combination of 700 atm compressed hydrogen and saturated aqueous solution of lithium chlorate) at room temperature, but direct electroreduction of chlorate only proceeds with unacceptably high overvoltages, even for the most catalytically active electrodes. In the present study, we experimentally demonstrated that this process can be performed via redox-mediator catalysis by intermediate products of chlorate reduction, owing to their participation in homogeneous com- and disproportionation reactions. A series of current–voltage and discharge characteristics were measured for hydrogen-chlorate membrane–electrode assembly (MEA) cells at various concentrations of chlorate and sulfuric acid under operando spectrophotometric monitoring of the electrolyte composition during the discharge. We established that chlorine dioxide (ClO2) is the key intermediate product; its fraction in the electrolyte solution increases progressively, up to its maximum, equal to 0.4–0.6 of the initial amount of chlorate anions, whereas the ClO2 amount decreases gradually to a zero value in the later stage. In most discharge experiments, the Faradaic yield exceeded 90% (maximal value: 99%), providing approximately 48% chemical energy storage-to-electricity conversion efficiency at maximal power of the discharge (max value: 402 mW/cm2). These results support prospect of a hydrogen-chlorate flow current generator as a highly specific energy-capacity source for airless media.

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Konev D. V. et al. Hydrogen-Chlorate Electric Power Source: Feasibility of the Device, Discharge Characteristics and Modes of Operation // Molecules. 2022. Vol. 27. No. 17. p. 5638.

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Konev D. V., Istakova O. I., Ruban E. A., Glazkov A. T., Vorotyntsev M. A. Hydrogen-Chlorate Electric Power Source: Feasibility of the Device, Discharge Characteristics and Modes of Operation // Molecules. 2022. Vol. 27. No. 17. p. 5638.

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TY - JOUR

DO - 10.3390/molecules27175638

UR - https://doi.org/10.3390%2Fmolecules27175638

TI - Hydrogen-Chlorate Electric Power Source: Feasibility of the Device, Discharge Characteristics and Modes of Operation

T2 - Molecules

AU - Konev, Dmitry V

AU - Istakova, Olga I

AU - Glazkov, Artem T

AU - Vorotyntsev, M. A.

AU - Ruban, Evgeny A.

PY - 2022

DA - 2022/09/01 00:00:00

PB - Multidisciplinary Digital Publishing Institute (MDPI)

SP - 5638

IS - 17

VL - 27

PMID - 36080404

SN - 1420-3049

ER -

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@article{2022_Konev,

author = {Dmitry V Konev and Olga I Istakova and Artem T Glazkov and M. A. Vorotyntsev and Evgeny A. Ruban},

title = {Hydrogen-Chlorate Electric Power Source: Feasibility of the Device, Discharge Characteristics and Modes of Operation},

journal = {Molecules},

year = {2022},

volume = {27},

publisher = {Multidisciplinary Digital Publishing Institute (MDPI)},

month = {sep},

url = {https://doi.org/10.3390%2Fmolecules27175638},

number = {17},

pages = {5638},

doi = {10.3390/molecules27175638}

}

MLA

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Konev, Dmitry V., et al. “Hydrogen-Chlorate Electric Power Source: Feasibility of the Device, Discharge Characteristics and Modes of Operation.” Molecules, vol. 27, no. 17, Sep. 2022, p. 5638. https://doi.org/10.3390%2Fmolecules27175638.

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Publisher

Multidisciplinary Digital Publishing Institute (MDPI)

Journal

Molecules

Quartile SCImago

Quartile WOS

Impact factor

4.6

ISSN

14203049 (Print)

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