Topic
Selective catalytic reduction
About: Selective catalytic reduction is a research topic. Over the lifetime, 10502 publications have been published within this topic receiving 226291 citations.
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TL;DR: In this paper, transition metals Co, Mn, and Cu were introduced into a Ce-W-Ti catalyst to promote low-temperature catalytic activity, and the results showed that the Cu species doped into the catalysts optimized surface acid content.
65 citations
TL;DR: In this article, a self-template-driven self-templating method was used for the preparation of copper doped ceria porous nanostructures with a tunable BET surface area.
Abstract: Copper doped ceria porous nanostructures with a tunable BET surface area were prepared using an efficient and general metal–organic-framework-driven, self-template route. The XRD, SEM and TEM results indicate that Cu2+ was successfully substituted into the CeO2 lattice and well dispersed in the CeO2:Cu2+ nanocrystals. The CeO2:Cu2+ nanocrystals exhibit a superior bifunctional catalytic performance for CO oxidation and selective catalytic reduction of NO. Interestingly, CO oxidation reactivity over the CeO2:Cu2+ nanocrystals was found to be dependent on the Cu2+ dopants and BET surface area. By tuning the content of Cu2+ and BET surface area through choosing different organic ligands, the 100% conversion temperature of CO over CeO2:Cu2+ nanocrystals obtained from thermolysis of CeCu–BPDC nanocrystals can be decreased to 110 °C. The porous nanomaterials show a high CO conversion rate without any loss in activity even after five cycles. Furthermore, the activity of the catalysts for NO reduction increased with the increase of BET surface, which is in accordance with the results of CO oxidation.
65 citations
TL;DR: In this paper, a series of monolithic cordierite supported V2O5-MoO3/TiO2 catalysts were synthesized through impregnation method, and the texture characteristics and the active components distribution of the obtained catalysts are investigated by Brunauer-Emmett-Teller (BET), Raman, H2-temperature programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS).
65 citations
TL;DR: In this paper, the synthesis and development of nickel and copper-based nanocatalysts for NaBH4-mediated reduction of environmental pollutants was discussed, where metallic Ni and Cu nanoparticles-embedded carbon sheets, namely as C@Ni and C@Cu, were synthesized through annealing of Ni-BDC and Cu-Bdc metal-organic frameworks under an argon atmosphere at 600°C.
65 citations
Patent•
27 Oct 1994TL;DR: In this article, Nitrogen oxides are removed from the exhaust of an internal combustion engine which operates on a methane-containing fuel by reacting the nitrogen oxides and oxygen in the exhaust gas with a controlled amount of methane in the presence of a reducing catalyst.
Abstract: Nitrogen oxides are removed from the exhaust of an internal combustion engine which operates on a methane-containing fuel by reacting the nitrogen oxides and oxygen in the exhaust gas with a controlled amount of methane in the presence of a reducing catalyst The catalyst preferably comprises a crystalline zeolite having a silicon to aluminum ratio of equal to or greater than about 25 which is prepared from a non-acid zeolite which is ion exchanged with a cation selected from the group consisting of cobalt, nickel, iron, chromium, and manganese Methane for the reaction is provided as a portion of the methane-containing fuel Carbon monoxide present in the exhaust gas is converted to carbon dioxide simultaneously with the reduction of nitrogen oxides
65 citations