Hydrogen oxidation-driven hot electron flow detected by catalytic nanodiodes.
Nano Lett
; 9(11): 3930-3, 2009 Nov.
Article
em En
| MEDLINE
| ID: mdl-19731919
ABSTRACT
Hydrogen oxidation on platinum is shown to be a surface catalytic chemical reaction that generates a steady state flux of hot (>1 eV) conduction electrons. These hot electrons are detected as a steady-state chemicurrent across Pt/TiO(2) Schottky diodes whose Pt surface is exposed to hydrogen and oxygen. Kinetic studies establish that the chemicurrent is proportional to turnover frequency for temperatures ranging from 298 to 373 K for P(H2) between 1 and 8 Torr and P(O2) at 760 Torr. Both chemicurrent and turnover frequency exhibit a first order dependence on P(H2).
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MEDLINE
Idioma:
En
Ano de publicação:
2009
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Article