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Hydrogen Diffusion into Palladium Nanoparticles: Pivotal Promotion by Carbon
Author(s) -
Neyman Konstantin M.,
Schauermann Swetlana
Publication year - 2010
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.200904688
Subject(s) - palladium , hydrogen , carbon fibers , diffusion , materials science , nanoparticle , activation energy , metal , chemical physics , surface diffusion , chemical engineering , catalysis , nanotechnology , chemistry , metallurgy , composite material , thermodynamics , physics , composite number , organic chemistry , adsorption , engineering
The activation barrier for subsurface migration of surface hydrogen atoms on (111) facets of palladium nanoparticles drastically decreases or even vanishes in the presence of subsurface carbon atoms deposited nearby (see energy diagram). On regular Pd(111) surfaces, this promoting effect is essentially absent because of the hindered lateral mobility of the surface metal atoms.