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Oxygen Electroreduction Catalyzed by Gold Nanoclusters: Strong Core Size Effects
Author(s) -
Chen Wei,
Chen Shaowei
Publication year - 2009
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200901185
Subject(s) - nanoclusters , oxygen , catalysis , adsorption , electrochemistry , chemistry , fermi level , core (optical fiber) , materials science , inorganic chemistry , nanotechnology , chemical physics , electrode , physics , biochemistry , organic chemistry , quantum mechanics , composite material , electron
Abstract Bigger isn't better : Gold nanoclusters exhibit enhanced electrocatalytic activity in oxygen reduction when the core size decreased from Au 140 to Au 11 , as reflected by the onset potential E onset and peak current density J K (see picture). The increasing fraction of surface atoms with low coordination numbers and the shift of the d‐band center to the Fermi level facilitate oxygen adsorption.