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Title: Superior Oxygen Electrocatalysis on RuSe x Nanoparticles for Rechargeable Air Cathodes

Journal Article · · Advanced Energy Materials
 [1];  [2];  [3];  [1];  [4];  [3];  [4];  [2];  [1]
  1. Texas Material Institute and Materials Science and Engineering Program The University of Texas at Austin Austin TX 78712 USA
  2. Department of Chemistry Sungkyunkwan University Suwon 440‐746 Republic of Korea
  3. Department of Chemistry and the Institute for Computational and Engineering Sciences The University of Texas at Austin Austin TX 78712 USA
  4. Department of Chemistry and Nano Sciences Ewha Womans University Seoul 120‐750 Republic of Korea

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 Li 2 O 2 versus Li 2 O 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 Li 2 O 2 adsorbed on a surface layer of RuSe 2− δ than on a surface layer of RuO 2 , thereby shifting the more stable adsorbent from Li 2 O to Li 2 O 2 .

Sponsoring Organization:
USDOE
Grant/Contract Number:
DESC0005397
OSTI ID:
1411251
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Vol. 8 Journal Issue: 8; ISSN 1614-6832
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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  • Zaikovskii, Vladimir I.; Nagabhushana, Kyatanahalli S.; Kriventsov, Vladimir V.
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