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

doi:10.1002/aenm.201702037

Superior Oxygen Electrocatalysis on RuSe_x 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

Department of Materials Science and Engineering

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

12 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 language	English
Article number	1702037
Journal	Advanced Energy Materials
Volume	8
Issue number	8
DOIs	https://doi.org/10.1002/aenm.201702037
Publication status	Published - 2018 Mar 15

Bibliographical note

Funding Information:
J.-H.J. and E.L. contributed equally to this work. This work was supported by the program “Materials and Interfacial Chemistry for Next Generation Electrical Energy Storage” funded by the U.S. Department of Energy (DESC0005397), Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2009) and Welch Foundation (F-1841). The authors give special thanks to CCRF for TEM, NCIRF for ICP-AES, and TMI for XPS measurements.

Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

All Science Journal Classification (ASJC) codes

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1002/aenm.201702037

Cite this

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title = "Superior Oxygen Electrocatalysis on RuSex Nanoparticles for Rechargeable Air Cathodes",

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.",

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

note = "Funding Information: J.-H.J. and E.L. contributed equally to this work. This work was supported by the program “Materials and Interfacial Chemistry for Next Generation Electrical Energy Storage” funded by the U.S. Department of Energy (DESC0005397), Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2009) and Welch Foundation (F-1841). The authors give special thanks to CCRF for TEM, NCIRF for ICP-AES, and TMI for XPS measurements. Publisher Copyright: {\textcopyright} 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

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AU - Jang, Ji Hoon

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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.

N1 - Funding Information: J.-H.J. and E.L. contributed equally to this work. This work was supported by the program “Materials and Interfacial Chemistry for Next Generation Electrical Energy Storage” funded by the U.S. Department of Energy (DESC0005397), Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2009) and Welch Foundation (F-1841). The authors give special thanks to CCRF for TEM, NCIRF for ICP-AES, and TMI for XPS measurements. Publisher Copyright: © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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Y1 - 2018/3/15

N2 - 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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