Selective Oxidation of Ammonia by Co-adsorbed Oxygen on Iridium Surfaces: Formation of N2O

被引：3
作者：
Chen, Wenhua [1 ,2 ]
Shen, Quantong [1 ,2 ]
Bartynski, Robert A. [1 ,2 ]
机构：
[1] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA
[2] Rutgers State Univ, Surface Modificat Lab, Piscataway, NJ 08854 USA
来源：
CATALYSIS LETTERS | 2015年 / 145卷 / 03期
关键词：
Iridium; Faceting; Ammonia; Oxygen; Selectivity; Surface morphology; DENSITY-FUNCTIONAL THEORY; CATALYTIC-OXIDATION; NH3; OXIDATION; STRUCTURE SENSITIVITY; RUO2(110) SURFACE; IR SURFACES; PLATINUM; DECOMPOSITION; PT(100); MODEL;
D O I：
10.1007/s10562-014-1468-1
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：
Temperature programmed desorption is used to investigate ammonia oxidation by pre-adsorbed oxygen on planar Ir(210) and faceted Ir(210) with different facet sizes. Evidence is found for formation of N2O from both surfaces, which is the first observation of N2O production in catalytic ammonia oxidation under UHV conditions (< 1 x 10(-9) Torr). The selectivity of the reaction to N-2, N2O and NO can be tuned by oxygen pre-coverage, surface structure, and facet size. The reaction exhibits strong structure sensitivity on faceted Ir(210) versus planar Ir(210) and moderate size effects on faceted Ir(210) for average facet sizes of 5-14 nm.
引用
收藏
页码：757 / 761
页数：5
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