文章基本信息

标题：Porous VO_xN_y nanoribbons supported on CNTs as efficient and stable non-noble electrocatalysts for the oxygen reduction reaction
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作者：K. Huang ; K. Bi ; Y. K. Lu 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep17385
出版社：Springer Nature
摘要：Novel nanocomposites of carbon nanotubes supported porous VO_xN_y nonoribbons (VO_xN_y-CNTs) have been synthesized by the annealing of the sol-gel mixture of CNTs and V₂O₅ under NH₃ atmosphere as well as the ageing process in air. Besides the morphological and structural characterizations revealed by TEM, SEAD, EDS, XRD and XPS measurements, typical electrochemical tests including cyclic voltammetry (CV), rotating disk electrode (RDE) and chronoamperometry have been employed to determine the oxygen reduction reaction (ORR) performance of VO_xN_y-CNTs. Inspiringly, the results indicate that VO_xN_y-CNTs catalyst exhibits a 0.4 mA/cm² larger diffusion-limited current density, a 0.10 V smaller onset potential value, a 10.73% less of ORR current decay and an excellent methanol-tolerance compared with commercial Pt/C catalyst. Therefore, we have reasonable grounds to believe that this new VO_xN_y-CNTs nanocomposites can be regarded as a promising non-precious methanol-tolerant ORR catalyst candidate for alkaline fuel cells.