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Promotion effect of...
Promotion effect of rare earth elements (Ce, Nd, Pr) on physicochemical properties of M-Al mixed oxides (M = Cu, Ni, Co) and their catalytic activity in N 2 O decomposition
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- Ho, Hoang Phuoc, 1983 (author)
- Rheinisch-Westfaelische Technische Hochschule Aachen,RWTH Aachen University,Université de Montpellier,University of Montpellier,Chalmers tekniska högskola,Chalmers University of Technology,Universita di Bologna,University of Bologna
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- Jabłońska, Magdalena (author)
- Rheinisch-Westfaelische Technische Hochschule Aachen,RWTH Aachen University,Universität Leipzig,Leipzig University
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- Beltrami, Giada (author)
- University of Ferrara
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- Martucci, Annalisa (author)
- University of Ferrara
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- Cacciaguerra, Thomas (author)
- Université de Montpellier,University of Montpellier
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- Paulus, Werner (author)
- Université de Montpellier,University of Montpellier
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- Di Renzo, Francesco (author)
- Université de Montpellier,University of Montpellier
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- Fornasari, Giuseppe (author)
- Universita di Bologna,University of Bologna
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- Vaccari, Angelo (author)
- Universita di Bologna,University of Bologna
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- Benito, Patricia (author)
- Universita di Bologna,University of Bologna
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- Palkovits, Regina (author)
- Rheinisch-Westfaelische Technische Hochschule Aachen,RWTH Aachen University
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(creator_code:org_t)
- 2021-06-28
- 2021
- English.
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In: Journal of Materials Science. - : Springer Science and Business Media LLC. - 0022-2461 .- 1573-4803. ; 56:27, s. 15012-15028
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Abstract
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- A series of M-AlOx mixed oxides (M = Cu, Co, Ni) with the addition of high loadings of rare earth elements (REE, R = Ce, Nd, Pr; R0.5M0.8Al0.2, molar ratio) were investigated in N2O decomposition. The precursors were prepared by coprecipitation and subsequent calcination at 600 °C. The obtained mixed metal oxides were characterized by X-ray diffraction with Rietveld analysis, N2 sorption, and H2 temperature-programmed reduction. Depending on the nature of REE and the initial M-Al system, R cations could be separately segregated in oxide form or coordinated with the transition metal cations and form mixed structures. The addition of Ce3+ consistently led to nanocrystalline CeO2 mixed with the divalent oxides, whereas the addition of Nd3+ or Pr3+ resulted in the formation of their respective oxide phases as well as perovskites/Ruddlesden–Popper phases. The presence of REE modified the textural and redox properties of the calcined materials. The rare earth element-induced formation of low-temperature reducible MOx species that systematically improved the N2O decomposition on the modified catalysts compared to the pristine M-Al materials by the order of Co > Ni > Cu. The Ce0.5Co0.8Al0.2 catalyst revealed the highest activity and remained stable (approximately 90% of N2O conversion) for 50 h during time-on-stream in 1000 ppm N2O, 200 ppm NO, 20 000 ppm O2, 2500 ppm H2O/N2 balance at WHSV = 16 L g−1 h−1.
Subject headings
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
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- ref (subject category)
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Ho, Hoang Phuoc, ...
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Jabłońska, Magda ...
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Beltrami, Giada
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Martucci, Annali ...
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Cacciaguerra, Th ...
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Paulus, Werner
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show more...
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Di Renzo, France ...
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Fornasari, Giuse ...
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Vaccari, Angelo
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Benito, Patricia
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Palkovits, Regin ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Inorganic Chemis ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Physical Chemist ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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Journal of Mater ...
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Chalmers University of Technology