Highly efficient nonprecious metal catalyst prepared with metal-organic framework in a continuous carbon nanofibrous network

Shui Jianglan; Chen Chen; Grabstanowicz LaurenZhao DanLiu Di-Jia

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Highly efficient nonprecious metal catalyst prepared with metal-organic framework in a continuous carbon nanofibrous network

机译：Highly efficient nonprecious metal catalyst prepared with metal-organic framework in a continuous carbon nanofibrous network

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Fuel cell vehicles, the only all-electric technology with a demonstrated >300 miles per fill travel range, use Pt as the electrode catalyst. The high price of Pt creates a major cost barrier for large-scale implementation of polymer electrolyte membrane fuel cells. Nonprecious metal catalysts (NPMCs) represent attractive low-cost alternatives. However, a significantly lower turnover frequency at the individual catalytic site renders the traditional carbon-supported NPMCs inadequate in reaching the desired performance afforded by Pt. Unconventional catalyst design aiming at maximizing the active site density at much improved mass and charge transports is essential for the next-generation NPMC. We report here a method of preparing highly efficient, nanofibrous NPMC for cathodic oxygen reduction reaction by electro-spinning a polymer solution containing ferrous organometallics and zeolitic imidazolate framework followed by thermal activation. The catalyst offers a carbon nanonetwork architecture made of microporous nanofibers decorated by uniformly distributed high-density active sites. In a single-cell test, the membrane electrode containing such a catalyst delivered unprecedented volumetric activities of 3.3 A.cm(-3) at 0.9 V or 450 A.cm(-3) extrapolated at 0.8 V, representing the highest reported value in the literature. Improved fuel cell durability was also observed.

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《Proceedings of the National Academy of Sciences of the United States of America》 |2015年第34期|10629-10634|共6页
作者
Shui Jianglan; Chen Chen; Grabstanowicz LaurenZhao DanLiu Di-Jia;
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作者单位

Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA;

Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117576, Singapore;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
nanofibrous; nonprecious metal catalyst; metal-organic framework; fuel cell; oxygen reduction;

Highly efficient nonprecious metal catalyst prepared with metal-organic framework in a continuous carbon nanofibrous network

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