Реферат: SOx uptake and release properties of LaMnO3, Pd/LaMnO3, LaCoO3 and Pd/LaCoO3 perovskites were investigated via in situ Fourier transform infrared (FTIR) spectroscopy, temperature programmed desorption and X-ray photoelectron spectroscopy. Sulfation of the perovskite leads to the formation of surface sulfite/sulfate and bulk-like sulfate species. Pd addition to LaMnO3 and LaCoO3 significantly increases the sulfur adsorption capacity. Pd/LaMnO3 sample accumulates significantly more sulfur than LaMnO3; however it can also release a larger fraction of the accumulated SOx species in a reversible fashion at elevated temperatures in vacuum. This is not the case for Co-based materials, where thermal regeneration of bulk sulfates on poisoned LaCoO3 and Pd/LaCoO3 is extremely ineffective under similar conditions. However, in the presence of an external reducing agent such as H2 (g), Pd/LaMnO3 requires much lower temperature (873 K) for complete sulfur regeneration as compared to that of Pd/LaCoO3 (973 K). Sequential CO and SOx adsorption experiments performed via in situ FTIR indicate that in the presence of carbonyls and/or carbonates, Pd adsorption sites may have a stronger affinity for SOx as compared to that of the perovskite surface, particularly in the early stages of sulfur poisoning.

Библиографическая ссылка: Kurt M. , Say Z. , Ercan K.E. , Vovk E.I. , Kim C.H. , Ozensoy E.
Sulfur Poisoning and Regeneration Behavior of Perovskite-Based NO Oxidation Catalysts
Topics in Catalysis. 2017. V.60. N1-2. P.40-51. DOI: 10.1007/s11244-016-0721-9 WOS Scopus РИНЦ CAPlusCA OpenAlex Sciact

Файлы: Полный текст от издателя

Даты:

Опубликована online:	29 сент. 2016 г.
Опубликована в печати:	1 февр. 2017 г.

Идентификаторы БД:

Web of science:	WOS:000395015100005
Scopus:	2-s2.0-85013972960
РИНЦ:	29484984
Chemical Abstracts:	2016:1595620
Chemical Abstracts (print):	166:240129
OpenAlex:	W2524397729
Sciact:	21593

Цитирование в БД:

БД	Цитирований
Scopus	13
OpenAlex	11

Альметрики: