Journal
ACS NANO
Volume 8, Issue 12, Pages 12660-12668Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn505582e
Keywords
carbonization; direct methanol fuel cell; metal organic framework; oxygen reduction reaction
Categories
Funding
- National Research Fund for Fundamental Key Project [2014CB931801]
- National Natural Science Foundation of China [91023007, 20773033, 21025310]
- New Century Excellent Talents in University, Outstanding Young Funding of Heilongjiang Province
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The oxygen reduction reaction (ORR) is one of the key steps in clean and efficient energy conversion techniques such as in fuel cells and metalair batteries; however, several disadvantages of current ORRs including the kinetically sluggish process and expensive catalysts hinder mass production of these devices. Herein, we develop carbonized nanoparticles, which are derived from monodisperse nanoscale metal organic frameworks (MIL-88B-NH3), as the high performance ORR catalysts. The onset potential and the half-wave potential for the ORR at these carbonized nanoparticles is up to 1.03 and 0.92 V (vs RHE) in 0.1 M KOH solution, respectively, which represents the best ORR activity of all the non-noble metal catalysts reported so far. Furthermore, when used as the cathode of the alkaline direct fuel cell, the power density obtained with the carbonized nanoparticles reaches 22.7 mW/cm(2), 1.7 times higher than the commercial Pt/C catalysts.
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