RT Journal Article
T1 Selective Catalytic Reduction of NOx by CO over Cu(Fe)/SBA-15 Catalysts: Effects of the Metal Loading on the Catalytic Activity
A1 Souza, Monique S.
A1 Martins, Antonio J.
A1 Ribeiro, Jackson Anderson S.
A1 Campos, Adriana
A1 Oliveira, Alcineia C.
A1 Jucá, Raí F.
A1 Saraiva, Gilberto D.
A1 Rodríguez-Castellón, Enrique
A1 Araujo, Rinaldo S.
K1 Química inorgánica
AB Mesoporous Cu(Fe)/SBA-15 catalysts were prepared with distinct metal loadings of ca. 2–10 wt.%. A detailed set of characterizations using X-ray diffraction (XRD), electron paramagnetic resonance (EPR), transmission electron microscopy (TEM), scanning electron microscopy coupled to energy dispersive spectroscopy (SEM-EDS), Mössbauer spectroscopy, X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy was performed to correlate the relationship among structure, electronic properties and catalytic performances. All solids were evaluated in the selective catalytic reduction of NOx in the presence of CO (CO-SCR). The influence of the metal loadings on the overall activity indicated that introducing high amounts of Fe or Cu on the catalysts was beneficial to form either CuO or α-Fe2O3 clusters. Cux/SBA-15 series exhibited more efficient activity and poison-tolerant ability during CO-SCR reaction, in contrast to Fex/SBA-15. In spite of the Fe species introduced on SBA-15 having structural features similar to those of Cu ones, low interactions among Fe nanoparticles, silica and clusters impeded the high performances of Fe10/SBA-15. XPS revealed the Fe species in a more oxidized state, indicating the stability of the solid after the catalytic tests, in agreement with EPR and Raman spectroscopy. Cu8/SBA-15 worked better, being recyclable due to the interaction of the Cu2+ ions with SBA-15, avoiding the deactivation of the catalyst.
PB IOAP-MDPI
YR 2023
FD 2023-03-04
LK https://hdl.handle.net/10630/26142
UL https://hdl.handle.net/10630/26142
LA eng
NO Souza MS, Martins AJ, Ribeiro JAS, Campos A, Oliveira AC, Jucá RF, Saraiva GD, Torres MAM, Rodríguez-Castellón E, Araujo RS. Selective Catalytic Reduction of NOx by CO over Cu(Fe)/SBA-15 Catalysts: Effects of the Metal Loading on the Catalytic Activity. Catalysts. 2023; 13(3):527. https://doi.org/10.3390/catal13030527
NO The authors acknowledge the financial support by the Funcap (Grant PS1-0186-00346.01.00/21). A.C.O. and ERC thank to Ministerio de Ciencia e Innovación (Spain) projects PID2021-126235OB-C32 and TED2021-130756B-C31, and FEDER funds. Partial funding for open access charge: Universidad de Málaga
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 4 mar 2026