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Hydrogen Loading of Oxide Powder Particles: A Transmission IR Study for the Case of Zinc Oxide
Author(s) -
Noei Heshmat,
Qiu Hengshan,
Wang Yuemin,
Muhler Martin,
Wöll Christof
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.201000312
Subject(s) - hydrogen , zinc , oxide , conduction band , diffusion , materials science , nanoparticle , interstitial defect , transmission electron microscopy , chemical physics , inorganic chemistry , electron , chemistry , analytical chemistry (journal) , nanotechnology , doping , metallurgy , optoelectronics , organic chemistry , physics , quantum mechanics , chromatography , thermodynamics
Exposing ZnO nanoparticles to atomic and molecular hydrogen at room temperature decreases the transmission coefficient, which demonstrates that diffusion of hydrogen atoms to subsurface and bulk ZnO sites already occurs at these fairly low temperatures (see figure). The interstitial hydrogen atoms act as n‐type shallow donors, which increase the density of electrons in the conduction band.