Jump to main content
Jump to site search

Issue 10, 2013
Previous Article Next Article

Nitrogen: unraveling the secret to stable carbon-supported Pt-alloy electrocatalysts

Author affiliations

Abstract

Nitrogen functionalities significantly improve performance for metal-based carbon-supported catalysts, yet their specific role is not well understood. In this work, a direct observation of the nanoscale spatial relationship between surface nitrogen and metal catalyst nanoparticles on a carbon support is established through principal component analysis (PCA) of electron energy loss spectral (EELS) imaging datasets acquired on an aberration-corrected scanning transmission electron microscope (STEM). Improved catalyst–support interactions correlated to high substrate nitrogen content in immediate proximity to stabilized nanoparticles are first demonstrated using model substrates. These insights are applied in direct methanol fuel cell prototypes to achieve substantial improvements in performance and long-term stability using both in-house and commercial catalysts doped with nitrogen. These results have immediate impact in advanced design and optimization of next generation high performance catalyst materials.

Graphical abstract: Nitrogen: unraveling the secret to stable carbon-supported Pt-alloy electrocatalysts

Back to tab navigation

Publication details

The article was received on 19 Jan 2013, accepted on 01 Mar 2013 and first published on 01 Mar 2013


Article type: Paper
DOI: 10.1039/C3EE40189H
Citation: Energy Environ. Sci., 2013,6, 2957-2964
  •   Request permissions

    Nitrogen: unraveling the secret to stable carbon-supported Pt-alloy electrocatalysts

    S. Pylypenko, A. Borisevich, K. L. More, A. R. Corpuz, T. Holme, A. A. Dameron, T. S. Olson, H. N. Dinh, T. Gennett and R. O'Hayre, Energy Environ. Sci., 2013, 6, 2957
    DOI: 10.1039/C3EE40189H

Search articles by author

Spotlight

Advertisements