Synthesis, Activity and Durability of Pt Nanoparticles Supported on Multi-walled Carbon Nanotubes for Oxygen Reduction
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Carbon nanotube supported metal nanoparticles (NPs) have attracted considerable attention due to their great potential for heterogeneous catalysis. In this paper, surfactant-free and well dispersed platinum (Pt) NPs supported on multi-walled carbon nanotubes (MWCNTs) were synthesized by immobilization of negatively charged Pt precursor (PtCl4[superscript 2−]) onto positively charged MWCNTs (NH3[superscript +]-MWCNTs) by electrostatic interactions, which was reduced subsequently to Pt NPs of ∼2 nm supported on MWCNTs by heating in 4% H2 atmosphere. The Pt loading on MWCNTs could be controlled by the pH of the suspension of Pt precursor and MWCNTs, and the Pt-precursor concentration in the suspension. These Pt NPs supported on MWCNTs showed comparable oxygen reduction reaction (ORR) activity to a commercial Pt catalyst supported on high-surface-area carbon but with enhanced durability.
DepartmentMassachusetts Institute of Technology. Department of Chemistry; Massachusetts Institute of Technology. Department of Materials Science and Engineering; Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal of The Electrochemical Society
Sheng, Wenchao, Seung Woo Lee, Ethan J. Crumlin, Shuo Chen, and Yang Shao-Horn. Synthesis, Activity and Durability of Pt Nanoparticles Supported on Multi-walled Carbon Nanotubes for Oxygen Reduction. Journal of The Electrochemical Society 158, no. 11 (2011): B1398. ©2011 ECS - The Electrochemical Society
Final published version