4.8 Article

Ultra-low overpotential and high rate capability in Li-O2 batteries through surface atom arrangement of PdCu nanocatalysts

期刊

ENERGY & ENVIRONMENTAL SCIENCE
卷 7, 期 4, 页码 1362-1368

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ee43437k

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资金

  1. Institute for Basic Science in Korea
  2. National Research Foundation of Korea (NRF)
  3. Korea Government (MSIP) [2012-005624, R11-2007-050-0000-0]
  4. POSCO-RIST research program [2012K110]
  5. Converging Research Center Program [2013K000307]
  6. Basic Science Research Program through the Ministry of Education [S-2013-A0434-00024]
  7. Science and Technology, the National Research Foundation of Korea
  8. Ministry of Education, Science, and Technology [NRF-2010-C1AAA001-0029018]
  9. Ministry of Knowledge Economy [10041856]
  10. Energy Efficiency & Resources Core Technology Program of the KETEP
  11. Ministry of Trade, Industry Energy [20132020000260, 20132020000340]
  12. Korea Evaluation Institute of Industrial Technology (KEIT) [20132020000260, 20132020000340, 10041856] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
  13. National Research Foundation of Korea [2013H1A2A1033981, 2012R1A1B3000843, 2007-0056091, 2012M1A2A2671808, 2011-50319, 2012R1A2A1A01005624, 2012M1A2A2671807] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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PdCu bimetallic nanoparticles (NPs) having mixed disordered face-centered cubic (fcc) and ordered body-centered cubic (B2-type) phases enhance the kinetics of oxygen reduction/evolution reaction by significant reduction of overpotentials, which leads to the superb round-trip efficiency of similar to 80%. In addition, the PdCu catalyst demonstrates a remarkable cyclic enhancement in stability and an outstanding rate capability even at a high current density of 5000 mA g(carbon)(-1). Our first-principles calculations demonstrate that the low overpotentials of the PdCu catalyst are strongly correlated with the weak LiO2 adsorption strength, caused by electron transfer from Cu to the top-layer Pd atoms on the surface.

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