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Title: Induction of an electronic perturbation in supported metal catalysts

Abstract

The debate as to whether an electronic effect is responsible for perturbations in the normal behavior of supported metal catalysts has seized the attention of scientists for many years. Unfortunately, many of the proposed so-called electronic models can now be more satisfactorily explained in terms of either the surface concentration or the size of the ensembles present on the support surface. In this study the authors have used both ferroelectric and selected ceramic support media to demonstrate that at specific temperatures the catalytic activity of a supported metal particle can be enhanced to a significant degree. The observed improvement in the performances of these systems can be correlated with changes in the structure of the support media and to the different dielectric constants exhibited by these materials. A further aspect that must be taken into consideration is the finding from high-resolution TEM examinations that even after mild reduction at 350 C there was evidence that in the vicinity of metal particles the support underwent transformation to a lower oxide state.

Authors:
;
Publication Date:
Research Org.:
Northeastern Univ., Boston, MA (US)
Sponsoring Org.:
USDOE
OSTI Identifier:
20075918
DOE Contract Number:  
FG02-93ER14358
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical
Additional Journal Information:
Journal Volume: 104; Journal Issue: 18; Other Information: PBD: 11 May 2000; Journal ID: ISSN 1089-5647
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SUPPORTS; CATALYSTS; METALS; DISTURBANCES; TRANSMISSION ELECTRON MICROSCOPY; VALENCE

Citation Formats

Park, C., and Baker, R.T.K. Induction of an electronic perturbation in supported metal catalysts. United States: N. p., 2000. Web. doi:10.1021/jp993219c.
Park, C., & Baker, R.T.K. Induction of an electronic perturbation in supported metal catalysts. United States. doi:10.1021/jp993219c.
Park, C., and Baker, R.T.K. Thu . "Induction of an electronic perturbation in supported metal catalysts". United States. doi:10.1021/jp993219c.
@article{osti_20075918,
title = {Induction of an electronic perturbation in supported metal catalysts},
author = {Park, C. and Baker, R.T.K.},
abstractNote = {The debate as to whether an electronic effect is responsible for perturbations in the normal behavior of supported metal catalysts has seized the attention of scientists for many years. Unfortunately, many of the proposed so-called electronic models can now be more satisfactorily explained in terms of either the surface concentration or the size of the ensembles present on the support surface. In this study the authors have used both ferroelectric and selected ceramic support media to demonstrate that at specific temperatures the catalytic activity of a supported metal particle can be enhanced to a significant degree. The observed improvement in the performances of these systems can be correlated with changes in the structure of the support media and to the different dielectric constants exhibited by these materials. A further aspect that must be taken into consideration is the finding from high-resolution TEM examinations that even after mild reduction at 350 C there was evidence that in the vicinity of metal particles the support underwent transformation to a lower oxide state.},
doi = {10.1021/jp993219c},
journal = {Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical},
issn = {1089-5647},
number = 18,
volume = 104,
place = {United States},
year = {2000},
month = {5}
}