Tailoring multi-metallic nanotubes by copper nanowires with platinum and gold via galvanic replacement route for the efficient methanol oxidation reaction. (20th August 2018)

• Record Type: Journal Article
• Authors: Naresh, N.; Karthik, P.; Vinoth, R.; Muthamizhchelvan, C.; Neppolian, B.
• Is Part Of: Electrochimica acta. Volume 282(2018)
• Page Start: 792
• Page End: 798
• Publication Date: 2018-08-20
• Subjects: Trimetallic CuPtAu nanotubes -- Galvanic replacement reaction -- Kirkendall effect -- MOR; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.06.094
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: A facile galvanic replacement approach was successfully adopted to design trimetallic CuPtAu nanotubes (NTs) using pre-synthesized Cu nanowires (Cu NWs) as a partial sacrificial template. It was observed that both galvanic replacement reaction and Kirkendall effect played a crucial role for the formation of trimetallic CuPtAu NTs. The morphological studies clearly confirmed that formation of well-defined trimetallic CuPtAu NTs. The prepared trimetallic NTs exhibited remarkable methanol oxidation performance compared to that of commercial Pt/C catalyst. A maximum current density of 1959.67 mA/mg Pt −1 was achieved, which was ∼4.2 fold higher than commercial Pt/C catalyst. This strategy can be adopted for the synthesis of Pt-based metallic nanotubes for efficient MOR activity. Graphical abstract: Image 1