Carbonized Nanoscale Metal–Organic Frameworks as High Performance Electrocatalyst for Oxygen Reduction Reaction
2014; American Chemical Society; Volume: 8; Issue: 12 Linguagem: Inglês
10.1021/nn505582e
ISSN1936-086X
AutoresShenlong Zhao, Huajie Yin, Lei Du, Liangcan He, Kun Zhao, Lin Chang, Geping Yin, Huijun Zhao, Shaoqin Liu, Zhiyong Tang,
Tópico(s)Advanced battery technologies research
ResumoThe 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.
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