Department of Chemistry, University of California, Berkeley, California 94720, USA.
Nano Lett. 2009 Nov;9(11):3930-3. doi: 10.1021/nl9023275.
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).
在铂上的氢气氧化被证明是一个表面催化的化学反应，它产生一个稳定状态的热（>1 eV）传导电子通量。这些热电子被检测为横跨 Pt/TiO(2) 肖特基二极管的稳态化学电流，其 Pt 表面暴露于氢气和氧气中。动力学研究表明，在温度范围为 298 至 373 K 之间，对于 1 至 8 托的 P(H2) 和 760 托的 P(O2)，化学电流与周转率成正比。化学电流和周转率都表现出对 P(H2) 的一阶依赖关系。
