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Atomic interface effect of a single atom copper catalyst for enhanced oxygen reduction reactions

Journal Article · · Energy & Environmental Science
DOI:https://doi.org/10.1039/c9ee02974e· OSTI ID:1595249
 [1];  [2];  [1];  [1];  [3];  [4];  [4];  [5];  [6];  [5];  [7];  [7];  [8];  [6];  [1];  [9]
  1. Beijing Inst. of Technology, Beijing (China)
  2. China Agricultural Univ., Beijing (China)
  3. Univ. of Science and Technology Beijing, Beijing (China)
  4. Chinese Academy of Sciences (CAS), Beijing (China)
  5. Chinese Academy of Sciences (CAS), Shanghai (China)
  6. Tsinghua Univ., Beijing (China)
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  8. Univ. of Science and Technology of China, Hefei (China)
  9. Department of Chemistry; Tsinghua University; Beijing 100084; China
+ Show Author Affiliations
The regulation of catalytic activity in the oxygen reduction reaction (ORR) is significant to the development of metal–air batteries and other oxygen involving energy conversion devices. Herein, we propose an atomic interface strategy to construct a single atom copper catalyst (denoted as Cu-SA/SNC) which exhibits enhanced ORR activity with a half-wave potential of 0.893 V vs. RHE in alkaline media. Moreover, synchrotron-radiation-based X-ray absorption fine structure (XAFS) investigations together with density functional theory (DFT) calculations reveal that the isolated bond-shrinking low-valence Cu (+1)–N4–C8S2 atomic interface moiety serves as an active site during the ORR process, and the synergistic mechanism between the Cu species and the carbon matrix at the atomic interface plays a critical role in boosting the ORR efficiency, by adjusting the reaction free energy of intermediate adsorption. Furthermore, this atomic interface concept may provide an alternative methodology for the rational design of advanced oxygen electrode materials and new probability to improve their catalytic performance.
Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1595249
Journal Information:
Energy & Environmental Science, Journal Name: Energy & Environmental Science Journal Issue: 12 Vol. 12; ISSN EESNBY; ISSN 1754-5692
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY