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Materials (Basel)

Title:		Catalytic Abatement of Volatile Organic Compounds and Soot over Manganese Oxide Catalysts
Author(s):		Figueredo MJM; Cocuzza C; Bensaid S; Fino D; Piumetti M; Russo N;
Address:		"Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy"
Journal Title:		Materials (Basel)
Year:		2021
Volume:		20210812
Issue:		16
Page Number:		-
DOI:		10.3390/ma14164534
ISSN/ISBN:		1996-1944 (Print) 1996-1944 (Electronic) 1996-1944 (Linking)
Abstract:		"A set of manganese oxide catalysts was synthesized via two preparation techniques: solution combustion synthesis (Mn(3)O(4)/Mn(2)O(3)-SCS and Mn(2)O(3)-SCS) and sol-gel synthesis (Mn(2)O(3)-SG550 and Mn(2)O(3)-SG650). The physicochemical properties of the catalysts were studied by means of N(2)-physisorption at -196 degrees C, X-ray powder diffraction, H(2) temperature-programmed reduction (H(2)-TPR), soot-TPR, X-ray photoelectron spectroscopy (XPS) and field-emission scanning electron microscopy (FESEM). The high catalytic performance of the catalysts was verified in the oxidation of Volatile Organic Compounds (VOC) probe molecules (ethene and propene) and carbon soot in a temperature-programmed oxidation setup. The best catalytic performances in soot abatement were observed for the Mn(2)O(3)-SG550 and the Mn(3)O(4)/Mn(2)O(3)-SCS catalysts. The catalytic activity in VOC total oxidation was effectively correlated to the enhanced low-temperature reducibility of the catalysts and the abundant surface O(alpha)-species. Likewise, low-temperature oxidation of soot in tight contact occurred over the Mn(2)O(3)-SG550 catalyst and was attributed to high amounts of surface O(alpha)-species and better surface reducibility. For the soot oxidation in loose contact, the improved catalytic performance of the Mn(3)O(4)/Mn(2)O(3)-SCS catalyst was attributed to the beneficial effects of both the morphological structure that-like a filter-enhanced the capture of soot particles and to a probable high amount of surface acid-sites, which is characteristic of Mn(3)O(4) catalysts"
Keywords:		catalytic oxidation of volatile organic compounds manganese oxide catalysts soot catalytic oxidation sustainable catalysts;
Notes:		"PubMed-not-MEDLINEFigueredo, Miguel Jose Marin Cocuzza, Clarissa Bensaid, Samir Fino, Debora Piumetti, Marco Russo, Nunzio eng 768692/European Union's Horizon 2020 research and innovation programme under grant agreement No 768692./ Switzerland 2021/08/28 Materials (Basel). 2021 Aug 12; 14(16):4534. doi: 10.3390/ma14164534"