Hydrogen Oxidation-Driven Hot Electron Flow Detected by Catalytic Nanodiodes

Journal Article · Mon Jul 20 04:00:00 EDT 2009 · Nano Letters

DOI:https://doi.org/10.1021/nl9023275· OSTI ID:1012477

Hervier, Antoine; Renzas, J Russell; Park, Jeong Y; Somorjai, Gabor A

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{sub 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{sub H2} between 1 and 8 Torr and P{sub O2} at 760 Torr. Both chemicurrent and turnover frequency exhibit a first order dependence on P{sub H2}.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: Chemical Sciences Division
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1012477
• Report Number(s): LBNL-4528E
• Journal Information: Nano Letters, Journal Name: Nano Letters Journal Issue: 11 Vol. 9; ISSN 1530-6984
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CHEMICAL REACTIONS
ELECTRONS
HYDROGEN
KINETICS
OXIDATION
OXYGEN
PLATINUM