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ACS Nano. 2014 Dec 23;8(12):12660-8. doi: 10.1021/nn505582e. Epub 2014 Dec 3.

Carbonized nanoscale metal-organic frameworks as high performance electrocatalyst for oxygen reduction reaction.

Author information

1
School of Materials Science and Engineering, and §Center for Micro and Nanotechnology, Harbin Institute of Technology , Harbin 150080, P. R. China.

Abstract

The oxygen reduction reaction (ORR) is one of the key steps in clean and efficient energy conversion techniques such as in fuel cells and metal-air 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/cm2, 1.7 times higher than the commercial Pt/C catalysts.

KEYWORDS:

carbonization; direct methanol fuel cell; metal organic framework; oxygen reduction reaction

PMID:
25426850
DOI:
10.1021/nn505582e

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