Abstract
A facile aqueous method to construct a platinum nanoflowers (PtNFs)/three-dimensional (3D) graphene electrode for electrochemical catalysis was demonstrated. PtNFs composed of thin Pt nanowires with the length of 6–16 nm and the diameter of 2–3 nm were prepared on 3D graphene foam as a growth template in the aqueous solution without any surfactant. The 3D graphene foam was used for patterning PtNFs and controlling their morphology. The fabricated PtNF/3D graphene electrode was applied for electrocatalytic methanol oxidation. Electrochemical measurements show that the PtNF/3D graphene electrode has higher electrocatalytic activity and better stability than commercial Pt-C modified glassy carbon electrode. It displays promising potential for applications in fuel cells.
Highlights
Platinum-based nanostructures have attracted much attention in the development of chemical sensors [1], biosensors [2,3], and electrocatalysts of fuel cells [4,5,6,7,8,9] because of their unusual physical and chemical characteristics
The morphology and structure of platinum nanoflowers (PtNFs) experimental details can be seen in the Materials and Methods section
3D graphene can be modulated by the addition of a Pt precursor. These were studied of PtNFs on growing on 3D graphene can be modulated by the addition of a Pt precursor
Summary
Platinum-based nanostructures have attracted much attention in the development of chemical sensors [1], biosensors [2,3], and electrocatalysts of fuel cells [4,5,6,7,8,9] because of their unusual physical and chemical characteristics. The properties of Pt-based nanostructures, especially electrocatalytic activity, exceedingly rely on their shape, size, crystallinity and composition [10,11,12]. Since platinum is scarce in nature, great effort has been made to improve its catalytic activity to reduce its use [13,14]. The other is developing efficient support materials to enhance dispersion and catalytic efficiency of Pt nanostructures, such as carbon nanofibers [22,23], carbon nanotubes [24,25,26], carbon nanospheres [12], graphene oxide [11], graphene [27], etc
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