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Growth Trajectories and Coarsening Mechanisms of Metal Nanoparticle Electrocatalysts
Author(s) -
Yu Chengfei,
Holby Edward F.,
Yang Ruizhi,
Toney Michael F.,
Morgan Dane,
Strasser Peter
Publication year - 2012
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201200090
Subject(s) - small angle x ray scattering , materials science , nanoparticle , ostwald ripening , chemical physics , particle size , yield (engineering) , nanotechnology , scattering , electrochemistry , metal , chemical engineering , particle (ecology) , carbon fibers , chemistry , electrode , metallurgy , optics , composite material , oceanography , engineering , geology , physics , composite number
Keeping an eye on electrocatalysts: In situ small angle X‐ray scattering (SAXS) combined with an electrochemical rate model yield insight in the evolution of the particle size distributions (PSDs) of carbon‐supported Pt nanoparticle ensembles. A critical 3–5 nm size region where particles remained structurally stable was identified. A dominant role for a surface energy‐driven Ostwald growth mechanism was deduced.