Abstract
The carbon nanotubes (CNTs) supported ruthenium cobalt alloy (Ru x Co) nanoparticles (Ru x Co/CNTs) were prepared with different Ru/Co ratios (x=Ru/Co=0.5, 1.0, 2.0, 3.0) by impregnated method using less expensive metal chlorides (CoCl2 and RuCl3) as precursors. The heat treatments were carried at the temperatures of 300°C, 400°C, 500°C and 700°C for comparison. It was found that the as prepared Ru x Co nanoparticles were uniformly dispersed on the CNTs support and exhibited mainly hexagonal alloyed phase with small amounts of metal oxides being presented at the surface. The mean particle sizes were smaller than 10 nm and the potentials corresponding to oxygen reduction reaction (ORR) were 0.67~0.73 V with the electron transfer numbers (n) of 3.0~4.0 by varying the Ru/Co ratios from 0.5 to 3.0. The amounts of Co presented in the alloy significantly influenced the growth of Ru x Co nanoparticles and the defects of CNTs support. The best ORR activity with high stability in an acid solution was achieved with the Ru2Co/CNTs when heat-treated at 400°C under H2 for 2 h.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callSimilar Papers
More From: Electrochemical Society Meeting Abstracts
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
