氮氧化物
催化作用
材料科学
选择性催化还原
纳米颗粒
吸附
化学工程
傅里叶变换红外光谱
高分辨率透射电子显微镜
多孔性
水银孔隙仪
无机化学
化学
透射电子显微镜
纳米技术
多孔介质
有机化学
复合材料
燃烧
工程类
作者
Lais F. Oton,Alcinéia C. Oliveira,Jesuina C.S. Araújo,Rinaldo dos Santos Araújo,Francisco F. de Sousa,Gilberto D. Saraiva,Rossano Lang,Larissa Otubo,Gian Carlos Silva Duarte,Adriana Campos
标识
DOI:10.1016/j.apt.2019.11.003
摘要
The selective catalytic reduction of NOx by CO (CO-SCR) was investigated over metals supported on porous alumina. The Pt, Co, Fe and Ni nanoparticles were dispersed on the alumina and characterized by XRD, textural properties, FTIR spectroscopy, chemical analyses, Py adsorption followed by FTIR measurements, HRTEM and SEM-EDS. Among the solids studied, the Pt/Al2O3 and NiPt/Al2O3 catalysts exhibited improved performance due to the interaction and synergy between the Pt(Ni) nanoparticles and the support. In other words, the electron transfer facility between the PtOx(Ni) and chlorined Pt species on the support provided a more active solid in the CO-SCR reaction. The surface acidity of Lewis acid sites and the porous features of the Pt/Al2O3 and NiPt/Al2O3 catalysts also contributed significantly to the high performance of these materials in the NOx conversion. The Pt/Al2O3 and NiPt/Al2O3 catalysts were tolerant to the poisoning by SO2 and H2O and depicted a superior catalytic performance, compared to the other solids.
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