Superior Oxygen Electrocatalysis on RuSex Nanoparticles for Rechargeable Air Cathodes

Ji Hoon Jang, Eunjik Lee, Penghao Xiao, Kyusung Park, In Young Kim, Graeme Henkelman, Seong Ju Hwang, Young Uk Kwon, John B. Goodenough

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A one-step, facile supercritical-ethanol-fluid synthesis of Se-modified Ru nanoparticles nucleated on carbon defects is reported, and it is demonstrated that these nanoparticles provide, with >70% efficiency at 1 A g−1, a highly active and reversible oxygen-reduction/oxygen-evolution reaction on an air cathode in a nonaqueous electrolyte. The Se modification not only prevents Ru oxidation during charge/discharge cycling, but also improves the catalytic activity by promoting Li2O2 versus Li2O deposited on the Ru particles during discharge. A computational calculation with density functional theory supports the role of a larger electron transfer to the oxygen of Li2O2 adsorbed on a surface layer of RuSe2− δ than on a surface layer of RuO2, thereby shifting the more stable adsorbent from Li2O to Li2O2.

Original languageEnglish
Article number1702037
JournalAdvanced Energy Materials
Volume8
Issue number8
DOIs
Publication statusPublished - 2018 Mar 15

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Electrocatalysis
Cathodes
Oxygen
Nanoparticles
Air
Adsorbents
Electrolytes
Density functional theory
Catalyst activity
Ethanol
Carbon
Oxidation
Defects
Fluids
Electrons

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Jang, J. H., Lee, E., Xiao, P., Park, K., Kim, I. Y., Henkelman, G., ... Goodenough, J. B. (2018). Superior Oxygen Electrocatalysis on RuSex Nanoparticles for Rechargeable Air Cathodes. Advanced Energy Materials, 8(8), [1702037]. https://doi.org/10.1002/aenm.201702037
Jang, Ji Hoon ; Lee, Eunjik ; Xiao, Penghao ; Park, Kyusung ; Kim, In Young ; Henkelman, Graeme ; Hwang, Seong Ju ; Kwon, Young Uk ; Goodenough, John B. / Superior Oxygen Electrocatalysis on RuSex Nanoparticles for Rechargeable Air Cathodes. In: Advanced Energy Materials. 2018 ; Vol. 8, No. 8.
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Jang, JH, Lee, E, Xiao, P, Park, K, Kim, IY, Henkelman, G, Hwang, SJ, Kwon, YU & Goodenough, JB 2018, 'Superior Oxygen Electrocatalysis on RuSex Nanoparticles for Rechargeable Air Cathodes', Advanced Energy Materials, vol. 8, no. 8, 1702037. https://doi.org/10.1002/aenm.201702037

Superior Oxygen Electrocatalysis on RuSex Nanoparticles for Rechargeable Air Cathodes. / Jang, Ji Hoon; Lee, Eunjik; Xiao, Penghao; Park, Kyusung; Kim, In Young; Henkelman, Graeme; Hwang, Seong Ju; Kwon, Young Uk; Goodenough, John B.

In: Advanced Energy Materials, Vol. 8, No. 8, 1702037, 15.03.2018.

Research output: Contribution to journalArticle

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AU - Jang, Ji Hoon

AU - Lee, Eunjik

AU - Xiao, Penghao

AU - Park, Kyusung

AU - Kim, In Young

AU - Henkelman, Graeme

AU - Hwang, Seong Ju

AU - Kwon, Young Uk

AU - Goodenough, John B.

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AB - A one-step, facile supercritical-ethanol-fluid synthesis of Se-modified Ru nanoparticles nucleated on carbon defects is reported, and it is demonstrated that these nanoparticles provide, with >70% efficiency at 1 A g−1, a highly active and reversible oxygen-reduction/oxygen-evolution reaction on an air cathode in a nonaqueous electrolyte. The Se modification not only prevents Ru oxidation during charge/discharge cycling, but also improves the catalytic activity by promoting Li2O2 versus Li2O deposited on the Ru particles during discharge. A computational calculation with density functional theory supports the role of a larger electron transfer to the oxygen of Li2O2 adsorbed on a surface layer of RuSe2− δ than on a surface layer of RuO2, thereby shifting the more stable adsorbent from Li2O to Li2O2.

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