Watching nanoparticles grow: The mechanism and kinetics for the formation of TiO2-Supported Platinum Nanoparticles

Peter J. Chupas; Karena W. Chapman; Guy Jennings; Peter L. Lee; Clare P. Grey

doi:10.1021/ja076437p

Watching nanoparticles grow: The mechanism and kinetics for the formation of TiO₂-Supported Platinum Nanoparticles

Peter J. Chupas
, Karena W. Chapman
, Guy Jennings
, Peter L. Lee
, Clare P. Grey

Chemistry

United States Department of Energy
Stony Brook University

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

128 Scopus citations

Abstract

The formation of supported Pt nanoparticles during the reduction of Pt⁴⁺ on TiO₂ under H₂ (4% in He) gas flow has been monitored using a differential approach to time-resolved pair distribution function (PDF) analysis of high-energy X-ray scattering data. The reduction of Pt⁴⁺ species was found to follow pseudo-zero-order reaction kinetics, with an activation energy of 0.52 eV. Reaction data obtained at constant temperature (100, 150, and 200 °C) and during heating (0-200 °C) indicate that the growth of nanoparticles from the reduce Pt⁰ species depends strongly on temperature and proceeds more rapidly upon heating.

Original language	English
Pages (from-to)	13822-13824
Number of pages	3
Journal	Journal of the American Chemical Society
Volume	129
Issue number	45
DOIs	https://doi.org/10.1021/ja076437p
State	Published - Nov 14 2007

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@article{c4ec7f9a91664ea1b43220172bf37afa,

title = "Watching nanoparticles grow: The mechanism and kinetics for the formation of TiO2-Supported Platinum Nanoparticles",

abstract = "The formation of supported Pt nanoparticles during the reduction of Pt4+ on TiO2 under H2 (4\% in He) gas flow has been monitored using a differential approach to time-resolved pair distribution function (PDF) analysis of high-energy X-ray scattering data. The reduction of Pt4+ species was found to follow pseudo-zero-order reaction kinetics, with an activation energy of 0.52 eV. Reaction data obtained at constant temperature (100, 150, and 200 °C) and during heating (0-200 °C) indicate that the growth of nanoparticles from the reduce Pt0 species depends strongly on temperature and proceeds more rapidly upon heating.",

author = "Chupas, \{Peter J.\} and Chapman, \{Karena W.\} and Guy Jennings and Lee, \{Peter L.\} and Grey, \{Clare P.\}",

year = "2007",

month = nov,

day = "14",

doi = "10.1021/ja076437p",

language = "English",

volume = "129",

pages = "13822--13824",

journal = "Journal of the American Chemical Society",

issn = "0002-7863",

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TY - JOUR

T1 - Watching nanoparticles grow

T2 - The mechanism and kinetics for the formation of TiO2-Supported Platinum Nanoparticles

AU - Chupas, Peter J.

AU - Chapman, Karena W.

AU - Jennings, Guy

AU - Lee, Peter L.

AU - Grey, Clare P.

PY - 2007/11/14

Y1 - 2007/11/14

N2 - The formation of supported Pt nanoparticles during the reduction of Pt4+ on TiO2 under H2 (4% in He) gas flow has been monitored using a differential approach to time-resolved pair distribution function (PDF) analysis of high-energy X-ray scattering data. The reduction of Pt4+ species was found to follow pseudo-zero-order reaction kinetics, with an activation energy of 0.52 eV. Reaction data obtained at constant temperature (100, 150, and 200 °C) and during heating (0-200 °C) indicate that the growth of nanoparticles from the reduce Pt0 species depends strongly on temperature and proceeds more rapidly upon heating.

AB - The formation of supported Pt nanoparticles during the reduction of Pt4+ on TiO2 under H2 (4% in He) gas flow has been monitored using a differential approach to time-resolved pair distribution function (PDF) analysis of high-energy X-ray scattering data. The reduction of Pt4+ species was found to follow pseudo-zero-order reaction kinetics, with an activation energy of 0.52 eV. Reaction data obtained at constant temperature (100, 150, and 200 °C) and during heating (0-200 °C) indicate that the growth of nanoparticles from the reduce Pt0 species depends strongly on temperature and proceeds more rapidly upon heating.

UR - https://www.scopus.com/pages/publications/36148931744

U2 - 10.1021/ja076437p

DO - 10.1021/ja076437p

M3 - Article

AN - SCOPUS:36148931744

SN - 0002-7863

VL - 129

SP - 13822

EP - 13824

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 45

ER -

Watching nanoparticles grow: The mechanism and kinetics for the formation of TiO₂-Supported Platinum Nanoparticles

Abstract

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