The preparation and characterization of novel Pt/C electrocatalysts with controlled porosity and cluster size
Abstract
Small platinum clusters have been prepared in zeolite hosts through ion exchange and controlled calcination/reduction processes. In order to enable electrochemical application, the pores of the Pt-zeolite were filled with electrically conductive carbon via infiltration with carbon precursors, polymerization, and pyrolysis. The zeolite host was then removed by acid washing, to leave a Pt/C electrocatalyst possessing quasi-zeolitic porosity and Pt clusters of well-controlled size. The electrocatalysts were characterized by TEM, XRD, EXAFS, nitrogen adsorption and electrochemical techniques. Depending on the synthesis conditions, average Pt cluster sizes in the Pt/C catalysts ranged from 1.3 to 2.0 nm. The presence of ordered porosity/structure in the catalysts was evident in TEM images as lattice fringes, and in XRD as a low-angle diffraction peak with d-spacing similar to the parent zeolite. The catalysts possess micro- and meso-porosity, with pore size distributions that depend upon synthesis variables. Finally, electroactive surface areas as high as 112 m2 gPt-1 have been achieved in Pt/C electrocatalysts which show oxygen reduction performance comparable to standard industrial catalysts.
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- BP Research Center, Naperville (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1426964
- Report Number(s):
- SAND-2007-1311J
Journal ID: ISSN 0959-9428; JMACEP; 526748
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Materials Chemistry
- Additional Journal Information:
- Journal Volume: 17; Journal Issue: 31; Journal ID: ISSN 0959-9428
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE
Citation Formats
Coker, Eric N., Steen, William A., Miller, Jeffrey T., Kropf, A. Jeremy, and Miller, James E. The preparation and characterization of novel Pt/C electrocatalysts with controlled porosity and cluster size. United States: N. p., 2007.
Web. doi:10.1039/b703916f.
Coker, Eric N., Steen, William A., Miller, Jeffrey T., Kropf, A. Jeremy, & Miller, James E. The preparation and characterization of novel Pt/C electrocatalysts with controlled porosity and cluster size. United States. https://doi.org/10.1039/b703916f
Coker, Eric N., Steen, William A., Miller, Jeffrey T., Kropf, A. Jeremy, and Miller, James E. Wed .
"The preparation and characterization of novel Pt/C electrocatalysts with controlled porosity and cluster size". United States. https://doi.org/10.1039/b703916f. https://www.osti.gov/servlets/purl/1426964.
@article{osti_1426964,
title = {The preparation and characterization of novel Pt/C electrocatalysts with controlled porosity and cluster size},
author = {Coker, Eric N. and Steen, William A. and Miller, Jeffrey T. and Kropf, A. Jeremy and Miller, James E.},
abstractNote = {Small platinum clusters have been prepared in zeolite hosts through ion exchange and controlled calcination/reduction processes. In order to enable electrochemical application, the pores of the Pt-zeolite were filled with electrically conductive carbon via infiltration with carbon precursors, polymerization, and pyrolysis. The zeolite host was then removed by acid washing, to leave a Pt/C electrocatalyst possessing quasi-zeolitic porosity and Pt clusters of well-controlled size. The electrocatalysts were characterized by TEM, XRD, EXAFS, nitrogen adsorption and electrochemical techniques. Depending on the synthesis conditions, average Pt cluster sizes in the Pt/C catalysts ranged from 1.3 to 2.0 nm. The presence of ordered porosity/structure in the catalysts was evident in TEM images as lattice fringes, and in XRD as a low-angle diffraction peak with d-spacing similar to the parent zeolite. The catalysts possess micro- and meso-porosity, with pore size distributions that depend upon synthesis variables. Finally, electroactive surface areas as high as 112 m2 gPt-1 have been achieved in Pt/C electrocatalysts which show oxygen reduction performance comparable to standard industrial catalysts.},
doi = {10.1039/b703916f},
journal = {Journal of Materials Chemistry},
number = 31,
volume = 17,
place = {United States},
year = {Wed May 23 00:00:00 EDT 2007},
month = {Wed May 23 00:00:00 EDT 2007}
}
Web of Science
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