In situ X‐ray Absorption Analysis of ∼1.8 nm Dendrimer‐Encapsulated Pt Nanoparticles during Electrochemical CO Oxidation | Zendy

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

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In situ X‐ray Absorption Analysis of ∼1.8 nm Dendrimer‐Encapsulated Pt Nanoparticles during Electrochemical CO Oxidation

Author(s) -

Weir Michael G.,

Myers V. Sue,

Frenkel Anatoly I.,

Crooks Richard M.

Publication year - 2010

Publication title -

chemphyschem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.016

H-Index - 140

eISSN - 1439-7641

pISSN - 1439-4235

DOI - 10.1002/cphc.201000452

Subject(s) - dendrimer , x ray absorption fine structure , nanoparticle , electrochemistry , absorption (acoustics) , in situ , materials science , electrode , chemistry , photochemistry , chemical engineering , nanotechnology , polymer chemistry , spectroscopy , organic chemistry , physics , quantum mechanics , engineering , composite material

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 first‐principles calculations if they remain stable.

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