In situ Small-Angle X-Ray Scattering Analysis of Improved Catalyst -- Support Interactions Through Nitrogen Modification

Kevin N. Wood; Steven T. Christensen; Svitlana Pylypenko; Tim S. Olson; Arrelaine A. Dameron; Katherine E. Hurst; Huyen N. Dinh; Thomas Gennett; Ryan O'hayre

doi:10.1557/mrc.2012.13

In situ Small-Angle X-Ray Scattering Analysis of Improved Catalyst -- Support Interactions Through Nitrogen Modification

Kevin N. Wood, Steven T. Christensen, Svitlana Pylypenko, Tim S. Olson, Arrelaine A. Dameron, Katherine E. Hurst, Huyen N. Dinh, Thomas Gennett, Ryan O'hayre

Research output: Contribution to journal › Article › peer-review

9 Scopus Citations

Abstract

In situ small-angle x-ray scattering (SAXS) is used to investigate the electrochemical durability of Pt-Metal (Pt-M) catalysts sputtered onto nitrogen-modified high surface area carbon powder. The results demonstrate that nitrogen modification promotes catalyst durability through reduction of nanoparticle dissolution and coarsening. Although particle sizes of Pt-M on high surface area carbon supports can be difficult to determine with transmission electron microscopy (TEM), a novel SAXS method has been employed to calculate particle size. SAXS analysis shows that the Pt-M nanoparticle size distribution remained stable for 3000 electrochemical cycles after nitrogen modification, whereas the unmodified support material leads to Pt-M nanoparticle instabilities. These results for industrial-relevant catalyst/support architectures underscore the potential of nitrogen-modified carbon support structures for enhanced Pt-M catalyst durability.

Original language	American English
Pages (from-to)	85-89
Number of pages	5
Journal	MRS Communications
Volume	2
Issue number	3
DOIs	https://doi.org/10.1557/mrc.2012.13 https://doi.org/10.1557/mrc.2012.13
State	Published - Sep 2012

NREL Publication Number

NREL/JA-5900-58338

Access to Document

Cite this

@article{1474e7832fba41fc9cd1d05b9c671eb5,

title = "In situ Small-Angle X-Ray Scattering Analysis of Improved Catalyst -- Support Interactions Through Nitrogen Modification",

abstract = "In situ small-angle x-ray scattering (SAXS) is used to investigate the electrochemical durability of Pt-Metal (Pt-M) catalysts sputtered onto nitrogen-modified high surface area carbon powder. The results demonstrate that nitrogen modification promotes catalyst durability through reduction of nanoparticle dissolution and coarsening. Although particle sizes of Pt-M on high surface area carbon supports can be difficult to determine with transmission electron microscopy (TEM), a novel SAXS method has been employed to calculate particle size. SAXS analysis shows that the Pt-M nanoparticle size distribution remained stable for 3000 electrochemical cycles after nitrogen modification, whereas the unmodified support material leads to Pt-M nanoparticle instabilities. These results for industrial-relevant catalyst/support architectures underscore the potential of nitrogen-modified carbon support structures for enhanced Pt-M catalyst durability.",

author = "Wood, {Kevin N.} and Christensen, {Steven T.} and Svitlana Pylypenko and Olson, {Tim S.} and Dameron, {Arrelaine A.} and Hurst, {Katherine E.} and Dinh, {Huyen N.} and Thomas Gennett and Ryan O'hayre",

year = "2012",

month = sep,

doi = "10.1557/mrc.2012.13",

language = "American English",

volume = "2",

pages = "85--89",

journal = "MRS Communications",

issn = "2159-6859",

publisher = "Springer International Publishing AG",

number = "3",

}

TY - JOUR

T1 - In situ Small-Angle X-Ray Scattering Analysis of Improved Catalyst -- Support Interactions Through Nitrogen Modification

AU - Wood, Kevin N.

AU - Christensen, Steven T.

AU - Pylypenko, Svitlana

AU - Olson, Tim S.

AU - Dameron, Arrelaine A.

AU - Hurst, Katherine E.

AU - Dinh, Huyen N.

AU - Gennett, Thomas

AU - O'hayre, Ryan

PY - 2012/9

Y1 - 2012/9

N2 - In situ small-angle x-ray scattering (SAXS) is used to investigate the electrochemical durability of Pt-Metal (Pt-M) catalysts sputtered onto nitrogen-modified high surface area carbon powder. The results demonstrate that nitrogen modification promotes catalyst durability through reduction of nanoparticle dissolution and coarsening. Although particle sizes of Pt-M on high surface area carbon supports can be difficult to determine with transmission electron microscopy (TEM), a novel SAXS method has been employed to calculate particle size. SAXS analysis shows that the Pt-M nanoparticle size distribution remained stable for 3000 electrochemical cycles after nitrogen modification, whereas the unmodified support material leads to Pt-M nanoparticle instabilities. These results for industrial-relevant catalyst/support architectures underscore the potential of nitrogen-modified carbon support structures for enhanced Pt-M catalyst durability.

AB - In situ small-angle x-ray scattering (SAXS) is used to investigate the electrochemical durability of Pt-Metal (Pt-M) catalysts sputtered onto nitrogen-modified high surface area carbon powder. The results demonstrate that nitrogen modification promotes catalyst durability through reduction of nanoparticle dissolution and coarsening. Although particle sizes of Pt-M on high surface area carbon supports can be difficult to determine with transmission electron microscopy (TEM), a novel SAXS method has been employed to calculate particle size. SAXS analysis shows that the Pt-M nanoparticle size distribution remained stable for 3000 electrochemical cycles after nitrogen modification, whereas the unmodified support material leads to Pt-M nanoparticle instabilities. These results for industrial-relevant catalyst/support architectures underscore the potential of nitrogen-modified carbon support structures for enhanced Pt-M catalyst durability.

UR - http://www.scopus.com/inward/record.url?scp=85011457835&partnerID=8YFLogxK

U2 - 10.1557/mrc.2012.13

DO - 10.1557/mrc.2012.13

M3 - Article

AN - SCOPUS:85011457835

SN - 2159-6859

VL - 2

SP - 85

EP - 89

JO - MRS Communications

JF - MRS Communications

IS - 3

ER -

In situ Small-Angle X-Ray Scattering Analysis of Improved Catalyst -- Support Interactions Through Nitrogen Modification

Abstract

NREL Publication Number

Access to Document

Other files and links

Fingerprint

Cite this