Voltammetric study of one-step electrochemical methane production during water and CO2 co-electrolysis in molten CsH2PO4

Aleksey Valerievich Nikiforov, Irina Petrushina, Erik Christensen, Rolf W. Berg, Niels J. Bjerrum

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Cyclic voltammetry was performed with a nickel electrode in molten CsH2PO4 at 350 °C and at approximately 25 bar of water pressure. The effect of adding carbon dioxide was examined. It is found that even small amounts of CO2 (partial pressure below 0.2 bar at 350 °C, corresponding to 0.5 bar at 22 °C of a 5:1 mixture of N2:CO2) have a pronounced effect on the cyclic voltammetry curves. Under these conditions the hydrogen formation is substituted by another process, methane formation. At the same time the cathodic current increased by a factor of 4–6, meaning that the ease of methanisation was much improved.
Original languageEnglish
JournalRenewable Energy
Volume145
Pages (from-to)508-513
Number of pages6
ISSN0960-1481
DOIs
Publication statusPublished - 2020

Keywords

  • Co-electrolysis
  • Carbon dioxide
  • CsH2PO4
  • Methane
  • Voltammetry

Cite this

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title = "Voltammetric study of one-step electrochemical methane production during water and CO2 co-electrolysis in molten CsH2PO4",
abstract = "Cyclic voltammetry was performed with a nickel electrode in molten CsH2PO4 at 350 °C and at approximately 25 bar of water pressure. The effect of adding carbon dioxide was examined. It is found that even small amounts of CO2 (partial pressure below 0.2 bar at 350 °C, corresponding to 0.5 bar at 22 °C of a 5:1 mixture of N2:CO2) have a pronounced effect on the cyclic voltammetry curves. Under these conditions the hydrogen formation is substituted by another process, methane formation. At the same time the cathodic current increased by a factor of 4–6, meaning that the ease of methanisation was much improved.",
keywords = "Co-electrolysis, Carbon dioxide, CsH2PO4, Methane, Voltammetry",
author = "Nikiforov, {Aleksey Valerievich} and Irina Petrushina and Erik Christensen and Berg, {Rolf W.} and Bjerrum, {Niels J.}",
year = "2020",
doi = "10.1016/j.renene.2019.06.075",
language = "English",
volume = "145",
pages = "508--513",
journal = "Renewable Energy",
issn = "0960-1481",
publisher = "Pergamon Press",

}

Voltammetric study of one-step electrochemical methane production during water and CO2 co-electrolysis in molten CsH2PO4. / Nikiforov, Aleksey Valerievich; Petrushina, Irina; Christensen, Erik; Berg, Rolf W.; Bjerrum, Niels J.

In: Renewable Energy, Vol. 145, 2020, p. 508-513.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Voltammetric study of one-step electrochemical methane production during water and CO2 co-electrolysis in molten CsH2PO4

AU - Nikiforov, Aleksey Valerievich

AU - Petrushina, Irina

AU - Christensen, Erik

AU - Berg, Rolf W.

AU - Bjerrum, Niels J.

PY - 2020

Y1 - 2020

N2 - Cyclic voltammetry was performed with a nickel electrode in molten CsH2PO4 at 350 °C and at approximately 25 bar of water pressure. The effect of adding carbon dioxide was examined. It is found that even small amounts of CO2 (partial pressure below 0.2 bar at 350 °C, corresponding to 0.5 bar at 22 °C of a 5:1 mixture of N2:CO2) have a pronounced effect on the cyclic voltammetry curves. Under these conditions the hydrogen formation is substituted by another process, methane formation. At the same time the cathodic current increased by a factor of 4–6, meaning that the ease of methanisation was much improved.

AB - Cyclic voltammetry was performed with a nickel electrode in molten CsH2PO4 at 350 °C and at approximately 25 bar of water pressure. The effect of adding carbon dioxide was examined. It is found that even small amounts of CO2 (partial pressure below 0.2 bar at 350 °C, corresponding to 0.5 bar at 22 °C of a 5:1 mixture of N2:CO2) have a pronounced effect on the cyclic voltammetry curves. Under these conditions the hydrogen formation is substituted by another process, methane formation. At the same time the cathodic current increased by a factor of 4–6, meaning that the ease of methanisation was much improved.

KW - Co-electrolysis

KW - Carbon dioxide

KW - CsH2PO4

KW - Methane

KW - Voltammetry

U2 - 10.1016/j.renene.2019.06.075

DO - 10.1016/j.renene.2019.06.075

M3 - Journal article

VL - 145

SP - 508

EP - 513

JO - Renewable Energy

JF - Renewable Energy

SN - 0960-1481

ER -