Perovskite-Like Mixed Oxides (LaSrMn1−x Ni x O4+δ, 0 ≤ x ≤ 1) as Catalyst for Catalytic NO Decomposition: TPD and TPR Studies

Xiao, Dehai; Li, Jing; Yang, Xiaojing

doi:10.1007/s10562-008-9807-8

Cited by 39 publications

(31 citation statements)

References 29 publications

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“…All single-phase oxides were indexed in the tetragonal space group I4/mmm. These results are in a good agreement with those reported earlier [1,[23][24][25][26][27][28][29]. However, it should be noted that Millburn et al [29] prepared the single-phase LaSrNi 0.5 Mn 0.5 O 4 only under dried deoxygenated argon flow at 1200-1300°C, but not in air.…”

Section: Resultssupporting

confidence: 91%

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Synthesis, oxygen nonstoichiometry and total conductivity of (La,Sr)2(Mn,Ni)O4±

2015

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Section: Resultssupporting

confidence: 91%

“…For example, LaSrNi 1 -x Mn x O 4 ± δ was investigated as catalyst for NO direct decomposition [28]. The high-spin state of Ni +3 ions and their high thermodynamic stability under reducing atmosphere (Ar, 1300°C) were established by Millburn for LaSrNi 0.5 Mn 0.5 O 4± δ [29].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, oxygen nonstoichiometry and total conductivity of (La,Sr)2(Mn,Ni)O4±

2015

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“…It should be noted that this temperature and the W/F value are much lower than those reported for other catalysts to obtain the same NO conversion [24][25][26][27][28] [28] catalysts were reported to exhibit *12%, *13%, \15%, *10%, and *5% NO conversion to N 2 , respectively, at 600°C under W/F of 3.0 g s mL -1 . On the other hand, ST-2(Ce 0.8 Mn 0.15 Ba 0.05 O x ) exhibited 45% NO conversion to N 2 under the same reaction conditions (Fig.…”

Section: Phases Detected By Xrdmentioning

confidence: 99%

“…Catalysts, such as precious metals [12][13][14], single metal oxides [15,16], Cu-ZSM-5 [17][18][19], alkali-doped Co 3 O 4 [20,21], perovskites [22][23][24][25][26], C-type cubic rare earth oxides [27,28], and Ba 0.5 /BaY 2 O 4 [29], have been found to be effective for direct decomposition of NO. We found that Ba-Ce-Co mixed oxides prepared by a polymerized complex method showed high NO decomposition activities [30].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Highly Effective CeO x –MnO y –BaO Catalysts for Direct NO Decomposition

et al. 2011

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Ce-Mn mixed oxides with a Mn/(Ce ? Mn) molar ratio of 0.25 were prepared by solvothermal (ST-1) and co-precipitation (CP) methods, and Ba was loaded on the Ce-Mn oxides. In addition, CeO 2 -MnO x -BaO catalysts with various compositions were directly prepared by the solvothermal (ST-2) method. The NO decomposition activities of these catalysts were examined. Among the catalysts examined, the ST-2 catalyst having a nominal composition of Ce 0.8 Mn 0.15 Ba 0.05 O x exhibited the highest activity; 77% NO conversion to N 2 was attained at 800°C. These catalysts were characterized by X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The Raman and XPS results indicate that the CP catalyst had larger amounts of the BaMnO 3-d and/or Mn 3 O 4 phases. The ST-1 and ST-2 catalysts had highly dispersed Ba species on the surface. The ST-2 catalyst had Mn species with the lowest binding energy of Mn 2p and also had a high population of oxygen vacancies in the ceria lattice, suggesting that Mn species with a low oxidation state contributes to the formation of oxygen vacancies, which play an important role in this reaction.

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“…Noble metal catalysts, including Pt, Pd, Rh, and Au, are of high activity for NO x decomposition; however, they are expensive (National Association of Securities Dealers Automated Quotations System [NASDAQ], 2014). On the other hand, previous studies indicate that perovskite-type catalysts have the potential to replace noble metal catalysts for NO x removal (Voorhoeve et al, 1972;Khan and Frey, 1993) due to their high activities in decomposing NO x into N 2 and O 2 (Ishihara et al, 2003;Zhang et al, 2006;Russo et al, 2007;Zhu et al 2009;Zhao et al, 2009;Ivanov et al, 2011;Wang et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Enhancement of nitric oxide decomposition efficiency achieved with lanthanum-based perovskite-type catalyst

Pan

Chen

Sheng

et al. 2016

Journal of the Air & Waste Management Association

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Direct decompositions of nitric oxide (NO) by La 0.7 Ce 0.3 SrNiO 4 , La 0.4 Ba 0.4 Ce 0.2 SrNiO 4 , and Pr 0.4 Ba 0.4 Ce 0.2 SrNiO 4 are experimentally investigated, and the catalysts are tested with different operating parameters to evaluate their activities. Experimental results indicate that the physical and chemical properties of La 0.7 Ce 0.3 SrNiO 4 are significantly improved by doping with Ba and partial substitution with Pr. NO decomposition efficiencies achieved with La 0.4 Ba 0.4 Ce 0.2 SrNiO 4 and Pr 0.4 Ba 0.4 Ce 0.2 SrNiO 4 are 32% and 68%, respectively, at 400°C with He as carrier gas. As the temperature is increased to 600°C, NO decomposition efficiencies achieved with La 0.4 Ba 0.4 Ce 0.2 SrNiO 4 and Pr 0.4 Ba 0.4 Ce 0.2 SrNiO 4 , respectively, reach 100% with the inlet NO concentration of 1000 ppm while the space velocity is fixed at 8000 hr −1 . Effects of O 2 , H 2 O (g) , and CO 2 contents and space velocity on NO decomposition are also explored. The results indicate that NO decomposition efficiencies achieved with La 0.4 Ba 0.4 Ce 0.2 SrNiO 4 and Pr 0.4 Ba 0.4 Ce 0.2 SrNiO 4 , respectively, are slightly reduced as space velocity is increased from 8000 to 20,000 hr −1 at 500°C. In addition, the activities of both catalysts (La 0.4 Ba 0.4 Ce 0.2 SrNiO 4 and Pr 0.4 Ba 0.4 Ce 0.2 SrNiO 4 ) for NO decomposition are slightly reduced in the presence of 5% O 2 , 5% CO 2 , or 5% H 2 O (g) . For durability test, with the space velocity of 8000 hr −1 and operating temperature of 600°C, high N 2 yield is maintained throughout the durability test of 60 hr, revealing the long-term stability of Pr 0.4 Ba 0.4 Ce 0.2 SrNiO 4 for NO decomposition. Overall, Pr 0.4 Ba 0.4 Ce 0.2 SrNiO 4 shows good catalytic activity for NO decomposition. Implications: Nitrous oxide (NO) not only causes adverse environmental effects such as acid rain, photochemical smog, and deterioration of visibility and water quality, but also harms human lungs and respiratory system. Pervoskite-type catalysts, including La 0.7 Ce 0.3 SrNiO 4 , La 0.4 Ba 0.4 Ce 0.2 SrNiO 4 , and Pr 0.4 Ba 0.4 Ce 0.2 SrNiO 4 , are applied for direct NO decomposition. The results show that NO decomposition can be enhanced as La 0.7 Ce 0.3 SrNiO 4 is substituted with Ba and/or Pr. At 600°C, NO decomposition efficiencies achieved with La 0.4 Ba 0.4 Ce 0.2 SrNiO 4 and Pr 0.4 Ba 0.4 Ce 0.2 SrNiO 4 reach 100%, demonstrating high activity and good potential for direct NO decomposition. Effects of O 2 , H 2 O (g) , and CO 2 contents on catalytic activities are also evaluated and discussed. PAPER HISTORY

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Perovskite-Like Mixed Oxides (LaSrMn1−x Ni x O4+δ, 0 ≤ x ≤ 1) as Catalyst for Catalytic NO Decomposition: TPD and TPR Studies

Cited by 39 publications

References 29 publications

Synthesis, oxygen nonstoichiometry and total conductivity of (La,Sr)2(Mn,Ni)O4±

Synthesis, oxygen nonstoichiometry and total conductivity of (La,Sr)2(Mn,Ni)O4±

Synthesis of Highly Effective CeO x –MnO y –BaO Catalysts for Direct NO Decomposition

Enhancement of nitric oxide decomposition efficiency achieved with lanthanum-based perovskite-type catalyst

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