Oscillations of the NO-H2 reaction over Ir(110) in activity and selectivity

被引：12

作者：

de Wolf, CA

Nieuwenhuys, BE

Slinko, MM

Smirnov, MY

机构：

[1] Leiden Univ, Leiden Inst Chem, NL-2300 RA Leiden, Netherlands

[2] Russian Acad Sci, Inst Chem Phys, Moscow 117977, Russia

[3] Russian Acad Sci, Boreskov Inst Catalysis, Sieberian Branch, Novosibirsk 630090, Russia

来源：

SURFACE SCIENCE | 1999年 / 433卷

关键词：

hydrogen; iridium; nitrogen oxides; single crystal surfaces;

D O I：

10.1016/S0039-6028(99)00062-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Self-sustained isothermal oscillations in the NO-H, reaction were found on the Ir(110) surface. The rates of NH3 and N-2 formation oscillate exactly out of phase. The high activity state during the oscillations (high NO conversion) corresponds to a high rate of NH3 formation, while in the low activity state a high rate of N-2 formation has been observed. The shape of the oscillations is very sensitive to changes in the H-2/NO ratio or temperature. Build-up of a stable N species might play an important role in the mechanism of the oscillations. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：63 / 68

页数：6

共 9 条

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