| For small organic molecules fuel cells, platinum is the indispensable anode electrocatalyst. However, the surface of Pt is usually heavily poisoned by the strong adsorption of intermediates(for example:CO) produced during the oxidation of organic fuels, resulting in the lowering of catalytic performance. Alloying Pt with other affordable metals can reduce or eliminate the usage of Pt and increasing the resistance and long-term stability to poisoning, so as to realize economic sustainable development. Bimetallic alloy Au93Pt7 alloy nanowires were synthesized by a facile one-step wet chemical strategy and studied the electrocatalytic performance towards ethanol. The contents are shown as below:1. Ultralong Au93Pt7 nanowires were synthesized directly at the room temperatures, by mixing HAuCl4 and H2PtCl6 in an aqueous solution and using PVP and CTAB as dual stabilizers and ascorbic acid as a reductant. The morphologies, the surface structure of the nanowires were characterized by Transmission electron microscopy, scanning and transmission electron microscopy, X-ray diffraction, X-ray Photoclectron Spectroscopy.2. The growth mechanism of the nanowires was studied by monitoring the real time morphologies and adjusting the PVP:CTAB and the HAuCl4:H2PtCl6 molar ratios. The results showed Au93Pt7 nanowires were achieved by a directional coalescence between spherical nanoparticles.3. The electrocatalytic performance of Au93Pt7 alloy nanowires was studied in the alkaline ethanol fuel cells. The results showed the mass activity on Au93Pt7 nanowires is about ?12 times larger than that on Pt/C and the long-term stability is much higher than that on Pt/C, which may contribute to the synergistic effect of the bimetallic structure. |
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