Copper–aluminum hydrotalcite type precursors for NOx abatement
作者： Verónica Muñoz , Fatima Maria Zanon Zotin , Luz Amparo Palacio , None
DOI: 10.1016/J.CATTOD.2014.06.004
关键词: Copper 、 Hydrotalcite 、 Inorganic chemistry 、 Calcination 、 Materials science 、 Catalysis 、 NOx 、 Malachite 、 Redox 、 Noble metal
摘要: Abstract The reduction of NO by CO has been extensively studied for controlling the exhaust emissions. Most papers written on this subject have focused supported noble metal catalysts and their drawbacks, which include scarcity high cost, tendency to form N 2 O as a byproduct during light-off over TWC (three-way catalyst). A copper–aluminum hydrotalcite-type precursor was successfully synthesized with ratio Al/(Al + Cu) = 0.17, using carbonate compensation anion. Different synthesis parameters were varied aiming find pure phase yield. obtained after calcination 600 °C performance evaluated in CO. Another containing hydrotalcite malachite phases used compare properties catalysts. formation precursors mixed oxides evidenced X-ray diffraction (XRD) Raman spectroscopy. Redox TPR/TPO/TPR cycles, show different reducible copper species each material. catalyst derived from attained an excellent promoting low
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