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首页> 外文期刊>Catalysis science & technology >Synergistic incorporation of hybrid heterobimetal-nitrogen atoms into carbon structures for superior oxygen electroreduction performance
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Synergistic incorporation of hybrid heterobimetal-nitrogen atoms into carbon structures for superior oxygen electroreduction performance

机译：协同整合的混合heterobimetal-nitrogen原子碳结构优越氧电解还原性能

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摘要

Although Pt-based catalytic technology has led to significant advances in the development of electrocatalysts in fuel cells, Pt replacement with efficient and stable non-precious metal catalysts has a great technological significance for successful large-scale implementation of fuel cells. Here, we present the development of hybrid functional 1-dimensional carbon structures incorporated homogeneously with high contents of non-precious metal multi-dopants, consisting of iron, cobalt and nitrogen, as a promising alternative to Pt-based catalysts for the cathodic oxygen reduction reaction (ORR) through a modified electrospinning technique. These hybrid heterobimetal-nitrogen-incorporated carbon structures exhibit superior ORR electrocatalytic properties i.e., more positive reduction potential, high electroreduction current density, high electron transfer value (similar to 3.87) close to the perfect ORR and improved electrochemical stability with a very small decrease of similar to 8 mV in half-wave potential. The observed enhancement in electrochemical performance can be ascribed to the increased amount of catalytically active sites with relatively high contents of heterometallic iron and cobalt atoms surrounded by nitrogen species and their homogeneous distribution on the catalyst surface.
机译：尽管Pt-based催化技术已导致发展的重大进展electrocatalysts在燃料电池,Pt替换non-precious高效和稳定的金属催化剂有重要的技术意义为成功实施大规模的燃料细胞。功能维碳结构结合均匀高的内容non-precious金属multi-dopants组成的铁、钴和氮,是一种很有前途的替代Pt-based催化剂的阴极氧还原反应(ORR)修改后的电纺的技术。混合heterobimetal-nitrogen-incorporated碳结构表现出优越的奥尔electrocatalytic属性即,更积极的减少潜力,电解还原电流密度高,电子转移价值高(类似于3.87)接近完美的奥尔和改进与一个非常小的电化学稳定性减少类似于半波8 mV的潜力。可以归结于电化学性能增加数量的催化地活跃相对较高的网站的内容heterometallic铁和钴原子包围由氮物种及其均匀催化剂表面的分布。

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