Hydrogen Oxidation-Driven Hot Electron Flow Detected by Catalytic Nanodiodes

被引：90

作者：

Hervier, Antoine ^{[2
]}

Renzas, J. Russell ^{[2
]}

Park, Jeong Y. ^{[1
,3
]}

Somorjai, Gabor A. ^{[1
,2
,3
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

NANO LETTERS | 2009年 / 9卷 / 11期

关键词：

OXYGEN REACTION; WATER FORMATION; PLATINUM; SURFACE; PT(111); MECHANISM; DEUTERIUM; KINETICS;

D O I：

10.1021/nl9023275

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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/TiO2 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.

引用

页码：3930 / 3933

页数：4

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