In situ X-ray absorption analysis of ~1.8 nm dendrimer- encapsulated Pt nanoparticles during electrochemical CO oxidation

Michael G. Weir; V. Sue Myers; Anatoly I. Frenkel; Richard M. Crooks

doi:10.1002/cphc.201000452

In situ X-ray absorption analysis of ~1.8 nm dendrimer- encapsulated Pt nanoparticles during electrochemical CO oxidation

Michael G. Weir
, V. Sue Myers
, Anatoly I. Frenkel
, Richard M. Crooks

Materials Science and Engineering

University of Texas at Austin

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

29 Scopus citations

Abstract

We report an in situ X-ray absorption-fine structure (XAFS) spectroscopic analysis of ~1.8 nm Pt dendrimer-encapsulated nanoparticles (DENs) during electrocatalytic oxidation of CO. The results indicate that Pt nanoparticles encapsulated within poly(amidoamine) (PAMAM) dendrimers and immobilized on a carbon electrode retain their electrocatalytic activity and are structurally stable for extended periods during CO oxidation. This is a significant finding, because nanoparticles in this size range are good experimental models for comparison to firstprinciples calculations if they remain stable.

Original language	English
Pages (from-to)	2942-2950
Number of pages	9
Journal	ChemPhysChem
Volume	11
Issue number	13
DOIs	https://doi.org/10.1002/cphc.201000452
State	Published - Sep 2010

Keywords

Catalysis
Electrochemistry
Nanoparticles
Platinum
XAFS spectroscopy

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title = "In situ X-ray absorption analysis of \textasciitilde{}1.8 nm dendrimer- encapsulated Pt nanoparticles during electrochemical CO oxidation",

abstract = "We report an in situ X-ray absorption-fine structure (XAFS) spectroscopic analysis of \textasciitilde{}1.8 nm Pt dendrimer-encapsulated nanoparticles (DENs) during electrocatalytic oxidation of CO. The results indicate that Pt nanoparticles encapsulated within poly(amidoamine) (PAMAM) dendrimers and immobilized on a carbon electrode retain their electrocatalytic activity and are structurally stable for extended periods during CO oxidation. This is a significant finding, because nanoparticles in this size range are good experimental models for comparison to firstprinciples calculations if they remain stable.",

keywords = "Catalysis, Electrochemistry, Nanoparticles, Platinum, XAFS spectroscopy",

author = "Weir, \{Michael G.\} and Myers, \{V. Sue\} and Frenkel, \{Anatoly I.\} and Crooks, \{Richard M.\}",

year = "2010",

month = sep,

doi = "10.1002/cphc.201000452",

language = "English",

volume = "11",

pages = "2942--2950",

journal = "ChemPhysChem",

issn = "1439-4235",

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TY - JOUR

T1 - In situ X-ray absorption analysis of ~1.8 nm dendrimer- encapsulated Pt nanoparticles during electrochemical CO oxidation

AU - Weir, Michael G.

AU - Myers, V. Sue

AU - Frenkel, Anatoly I.

AU - Crooks, Richard M.

PY - 2010/9

Y1 - 2010/9

N2 - We report an in situ X-ray absorption-fine structure (XAFS) spectroscopic analysis of ~1.8 nm Pt dendrimer-encapsulated nanoparticles (DENs) during electrocatalytic oxidation of CO. The results indicate that Pt nanoparticles encapsulated within poly(amidoamine) (PAMAM) dendrimers and immobilized on a carbon electrode retain their electrocatalytic activity and are structurally stable for extended periods during CO oxidation. This is a significant finding, because nanoparticles in this size range are good experimental models for comparison to firstprinciples calculations if they remain stable.

AB - We report an in situ X-ray absorption-fine structure (XAFS) spectroscopic analysis of ~1.8 nm Pt dendrimer-encapsulated nanoparticles (DENs) during electrocatalytic oxidation of CO. The results indicate that Pt nanoparticles encapsulated within poly(amidoamine) (PAMAM) dendrimers and immobilized on a carbon electrode retain their electrocatalytic activity and are structurally stable for extended periods during CO oxidation. This is a significant finding, because nanoparticles in this size range are good experimental models for comparison to firstprinciples calculations if they remain stable.

KW - Catalysis

KW - Electrochemistry

KW - Nanoparticles

KW - Platinum

KW - XAFS spectroscopy

UR - https://www.scopus.com/pages/publications/77956869674

U2 - 10.1002/cphc.201000452

DO - 10.1002/cphc.201000452

M3 - Article

AN - SCOPUS:77956869674

SN - 1439-4235

VL - 11

SP - 2942

EP - 2950

JO - ChemPhysChem

JF - ChemPhysChem

IS - 13

ER -

In situ X-ray absorption analysis of ~1.8 nm dendrimer- encapsulated Pt nanoparticles during electrochemical CO oxidation

Abstract

Keywords

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