One-pot synthesis of Pt/carbon nanotubes by self-regulated reduction for electrocatalysis |
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| Authors: | Lee Chien-Liang Wu Shi-Chi |
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| Affiliation: | Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Science, Kaohsiung 807, Taiwan, Republic of China. |
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| Abstract: | This paper describes a method for size-controlled synthesis of Pt nanoparticles and their attachment to the sidewalls of multiwall carbon nanotubes (CNTs) by self-regulated reduction of sodium n-dodecyl sulfate (SDS), without surface pretreatment. The size of the Pt nanoparticles is controlled by adjusting the concentration of SDS. When Pt/CNTs are heated to 500 degrees C in N2 atmosphere, Pt nanochains are formed on the CNTs; some of these nanochains contain small islands. Electrochemical measurements confirm that the electroactivities of the Pt/CNT nanocatalysts increase with a decrease in the size of the Pt nanoparticles. Additionally, comparing with the heated Pt/CNT nanocatalysts containing smooth Pt nanochains, the heated Pt/CNT nanocatalysts containing Pt nanochains with small Pt islands show higher electrocatalysis activities and stability. |
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