Jump to main content
Jump to site search

Issue 36, 2018
Previous Article Next Article

Synthesis of self-assembled PtPdAg nanostructures with a high catalytic activity for oxygen reduction reactions

Author affiliations

Abstract

Designing a self-assembling structure for a Pt-based catalyst offers a great opportunity to enhance the electrocatalytic performance and maximize the use of precious metals. Herein, we report an etching method based on thermal treatment for the removal of less active metals from Pt-based alloys for the enhancement of the oxygen reduction reaction. PtPdAg nanostructures’ self-assembly can be easily controlled to the dimer stage or nanowires by stirring the nanoparticles in formamide with or without potassium iodide under heat for specific times. Thus oxygen reduction reaction-favoring PtPdAg hollow nanoparticle, nanodimer and nanowire catalysts are synthesized, all of which have been demonstrated to be promoting factors for the ORR. In a Pt-based catalyst, the arrangement and configuration of the surface or topmost few layer atoms influence the adsorption of oxygen and activation for ORR. The PtPdAg dimer catalyst shows excellent ORR activity compared to other PtPdAg nanostructures and commercial Pt/C i.e. 7.2 times higher specific activity and 4.1 times higher mass activity. We further carried out DFT calculations and from the results, we conclude that the most chemically inequivalent structure such as PtPdAg/C nanodimer alloys possesses the weakest oxygen binding energy.

Graphical abstract: Synthesis of self-assembled PtPdAg nanostructures with a high catalytic activity for oxygen reduction reactions

Back to tab navigation

Supplementary files

Publication details

The article was received on 03 May 2018, accepted on 11 Aug 2018 and first published on 13 Aug 2018


Article type: Paper
DOI: 10.1039/C8NR03593H
Citation: Nanoscale, 2018,10, 17140-17147
  •   Request permissions

    Synthesis of self-assembled PtPdAg nanostructures with a high catalytic activity for oxygen reduction reactions

    M. A. Ud Din, F. Saleem, M. Zulfiqar and X. Wang, Nanoscale, 2018, 10, 17140
    DOI: 10.1039/C8NR03593H

Search articles by author

Spotlight

Advertisements