纳米材料基催化剂
催化作用
碳纳米管
材料科学
纳米颗粒
化学工程
循环伏安法
透射电子显微镜
纳米技术
电化学
化学
物理化学
电极
有机化学
工程类
作者
Gabriel Rosado,Ysmael Verde,Ana María Valenzuela-Muñiz,Romeli Barbosa,Mitsutoshi Yoshida,Beatriz Escobar
标识
DOI:10.1016/j.ijhydene.2016.07.098
摘要
The synthesis and characterization of Pt–Ni nanoparticles with different Ni:Pt atomic ratios and supported on multi-walled carbon nanotubes (MWCNTs) for oxygen reduction reaction (RRO) is investigated. The crystal structure and the elemental analysis of Pt–Ni/MWCNTs nanocatalysts are characterized by X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS), respectively. The morphology of these nanocatalysts is observed by transmission electron microscopy (TEM). The results reveal that Pt–Ni nanocatalysts with a nanoparticle size ranging from 6 to 7 nm are immobilized on the surface of MWCNTs. The kinetics and mechanism of the ORR were analyzed in a 0.5 M H2SO4 solution. The cyclic voltammetry response indicates that PtNi/MWCNTs catalyst displays a higher performance than Pt/MWCNT, which may be due to the alloy of Ni species in PtNi systems, demonstrating that they are promising materials for using in fuel cells.
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