Skip to main content
Dryad logo

Growth of carbon nanofibres on molybdenum carbide nanowires and their self-decoration with noble-metal nanoparticles

Citation

Vilfan, Mojca; Vengust, Damjan; Mrzel, Aleš (2020), Growth of carbon nanofibres on molybdenum carbide nanowires and their self-decoration with noble-metal nanoparticles, Dryad, Dataset, https://doi.org/10.5061/dryad.931zcrjh2

Abstract

High specific surface area makes carbon nanofibres suitable for catalyst support. Here we report on optimisation of carbon nanofibre (CNF) growth on molybdenum carbide nanowires (MoCNW) by direct carburization of Mo6S2I8 nanowire bundles. Typical CNFs obtained by this method are several hundreds of nanometres long at a diameter of 10-20 nm. We show that nanofibre growth does not depend on the initial morphology of the nanowires: nanofibres grow on individual bundles of MoCNW, on dense networks of nanowires deposited on silicon substrate, and on free-standing nanowire foils. We find that carbon nanofibres remain firmly attached to the nanowires even if they are modified into Mo2C and further into MoS2 nanowires. The method thus enables production of a novel hybrid material composed of MoS2 nanowires densely covered with carbon nanofibres. We have additionally shown that the obtained CNFs can easily be self-decorated with platinum nanoparticles with diameters of several nanometres directly from water solution at room temperature without reducing agents. Such efficient synthesis and decoration process yield hybrid platinum/CNF/molybdenum-based NW materials, which are a promising material for a wide range of possible future applications, including sensitive sensorics and improved catalysis.

Methods

X-ray powder diffraction (XRD) was performed at room temperature using Bruker AXS D4 Endeavor diffractometer with Cu-Ka radiation and Sol-X energy-dispersive detector within angular range 2Θ from 10o to 70o with a step size of 0.02o and a collection time of 2 s at a rotation of 6 rpm.

EDS spectrum was obtained by high-resolution transmission electron microscope (Jeol JEM-2100F, 200 keV), allowing high contrast imaging and simultaneous EDS.

Funding

Javna Agencija za Raziskovalno Dejavnost RS, Award: P1-0040

Javna Agencija za Raziskovalno Dejavnost RS, Award: P1-0192

Javna Agencija za Raziskovalno Dejavnost RS, Award: P2-0091