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 | |
| Publication status | Published - 2018 Mar 15 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
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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 journal › Article
TY - JOUR
T1 - Superior Oxygen Electrocatalysis on RuSex Nanoparticles for Rechargeable Air Cathodes
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.
PY - 2018/3/15
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.
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.
UR - http://www.scopus.com/inward/record.url?scp=85037339649&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85037339649&partnerID=8YFLogxK
U2 - 10.1002/aenm.201702037
DO - 10.1002/aenm.201702037
M3 - Article
AN - SCOPUS:85037339649
VL - 8
JO - Advanced Energy Materials
JF - Advanced Energy Materials
SN - 1614-6832
IS - 8
M1 - 1702037
ER -