Selective reduction of nitric oxide over noble metals

Catalysis for NOx abatement

“…The noble metals in typical three-way catalysts (Pt, Pd, Rh) are dispersed as individual atoms or small clusters of atoms over an oxide support. In the early TWCs, Rh became the catalytic element of choice for NO x control [48]. In the case of Rh/ Al 2 O 3 catalysts, presence of the metal-support interaction has been shown to be present between zero valent Rh atoms at the interface and the oxygen ions of the support [49].…”

Using temporal analysis of products and flux response technology to determine diffusion coefficients in catalytic monoliths

“…In order to maintain high catalyst surface area, the active phase, e.g. a platinum group metal in the case of the automotive catalysts, is impregnated onto an oxide washcoat supported on the monolith (Taylor et al, 1980, Taylor 1984Oh et al, 1986;Heck et al, 1995 andSummers et al, 1994).…”

Detailed surface reaction mechanism for reduction of NO by CO

“…Considering all of the facts in literature, we propose here a surface reaction mechanism based on NO dissociation, for Pt group catalysts. The formation of N 2 directly from the combination of NO * and N * is proposed in a few articles [15,[18][19][20], i.e., the reaction NO * + N * ! N 2 * + O * + * .…”