Fabrication of PtNi bimetallic nanoparticles supported on multi-walled carbon nanotubes

Abstract

Platinum/nickel bimetallic nanoparticles supported on multi-walled carbon nanotubes (xPtNi/CNTs) were synthesised. The fabrication process includes the chemical modification on the graphene surface of CNTs by acid treatment and the subsequent deposition of Pt or PtNi bimetallic nanoparticles with different compositions of Pt (x ¼ 100, 90, 80 and 70 wt%). The deposition was carried out using ethylene glycol as a reducing agent in the polyol method or using poly (amidoamine) dendrimer as a platform and sodium borohydride as a reducing agent to load the metal nanoparticles on the CNT surface. The structures of the produced PtNi/CNT nanoparticles were investigated by ultraviolet absorption spectra, X-ray diffraction (XRD) and the composite ratio consisting of 70 wt% of metal content and 30 wt% of CNTs was confirmed by the thermogravimetric analysis. The morphology and the phase identification of the produced PtNi/CNT nanoparticles were investigated by high-resolution scanning electron microscope, transmission electron microscope and XRD measurements. It was observed that the deposited Pt and PtNi bimetallic nanoparticles on the surface of CNTs had average particle sizes of 2-16 nm, when they were prepared from the polyol method. On the other hand, the PtNi/CNT nanoparticles prepared by using a dendrimer as an intermediate had a smaller particle size and more uniform size distribution of the quantum dot size ranged from 2 to 4 nm.

A Review of the Application and Performance of Carbon Nanotubes in Fuel Cells

“…[82]. Therefore, the use of various metals may have an impact on the catalytic activity [83]; we have a need to study the impact of the performance of various metals adding to the catalyst. For example, Ni added to PtRu catalyst with the support of multiwalled CNTs can improve the electrochemical surface of the catalyst; meanwhile, comparing with the commercial catalyst (20 wt.% PtRu/C), it has an effect in which the PtRu loading is reduced (10 wt.% PtRu) and a similar catalytic effect can be achieved [84].…”

Ultrasensitive electrochemical assay of hydrogen peroxide and glucose based on PtNi alloy decorated MWCNTs

“…[10][11][12] Modifying Pt surfaces with ad-metals to form bimetallic alloy can signicantly alter its surface catalytic reactivity. [13][14][15][16] Among various Pt-based bimetallic alloys, PtNi alloy has been widely investigated in the eld of fuel cell 17,18 and shows superior electrocatalytic activity for carbon monoxide 19 and methanol 20 oxidation. This might be attributed to the observations that nickel (Ni), as one of the 3d metals, shows a dramatically synergistic effect to enhance the electrochemical activity of Pt.…”

Ni-Co bimetal decorated carbon nanotube aerogel as an efficient anode catalyst in urea fuel cells

“…The filter cake was dried overnight in vacuum oven at 80 °C. Ni and Co binary metal nanoparticles were deposited onto the functionalized MWCNT by a simple polyol-reduction method 40 . Briefly, CoCl 2 and NiCl 2 were dissolved in 200 mL of ethylene glycol at 0.02 M of the total metal concentration.…”