Partial substitution of magnesium in lanthanum manganite perovskite for nitric oxide oxidation: The effect of substitution sites

2020 ◽  
Vol 580 ◽  
pp. 49-55
Author(s):  
Yiqing Zeng ◽  
Yanan Wang ◽  
Shule Zhang ◽  
Qin Zhong
Keyword(s):  
Nitric Oxide ◽  
Lanthanum Manganite ◽  
Partial Substitution ◽  
Manganite Perovskite

scholarly journals Lanthanum manganite perovskite ceramic powders for CO2 splitting: Influence of Pechini synthesis parameters on sinterability and reactivity

2019 ◽  
Vol 45 (12) ◽  
pp. 15636-15648 ◽  
Author(s):  
Julien Jouannaux ◽  
Anita Haeussler ◽  
Martin Drobek ◽  
André Ayral ◽  
Stéphane Abanades ◽  
...  
Keyword(s):  
Lanthanum Manganite ◽  
Ceramic Powders ◽  
Synthesis Parameters ◽  
Manganite Perovskite ◽  
Pechini Synthesis ◽  
Perovskite Ceramic

scholarly journals Vascular nitric oxide and superoxide anion contribute to sex-specific programmed cardiovascular physiology in mice

2009 ◽  
Vol 296 (3) ◽  
pp. R651-R662 ◽  
Author(s):  
Robert D. Roghair ◽  
Jeffrey L. Segar ◽  
Kenneth A. Volk ◽  
Mark W. Chapleau ◽  
Lindsay M. Dallas ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Blood Pressure ◽  
Locomotor Activity ◽  
Nitric Oxide Synthase ◽  
Dietary Intervention ◽  
Female Offspring ◽  
High Salt ◽  
Male Offspring ◽  
Partial Substitution ◽  
Oxide Synthase

Intrauterine environmental pertubations have been linked to the development of adult hypertension. We sought to evaluate the interrelated roles of sex, nitric oxide, and reactive oxygen species (ROS) in programmed cardiovascular disease. Programming was induced in mice by maternal dietary intervention (DI; partial substitution of protein with carbohydrates and fat) or carbenoxolone administration (CX, to increase fetal glucocorticoid exposure). Adult blood pressure and locomotor activity were recorded by radiotelemetry at baseline, after a week of high salt, and after a week of high salt plus nitric oxide synthase inhibition (by l-NAME). In male offspring, DI or CX programmed an elevation in blood pressure that was exacerbated by Nω-nitro-l-arginine methyl ester administration, but not high salt alone. Mesenteric resistance vessels from DI male offspring displayed impaired vasorelaxation to ACh and nitroprusside, which was blocked by catalase and superoxide dismutase. CX-exposed females were normotensive, while DI females had nitric oxide synthase-dependent hypotension and enhanced mesenteric dilation. Despite the disparate cardiovascular phenotypes, both male and female DI offspring displayed increases in locomotor activity and aortic superoxide production. Despite dissimilar blood pressures, DI and CX-exposed females had reductions in cardiac baroreflex sensitivity. In conclusion, both maternal malnutrition and fetal glucocorticoid exposure program increases in arterial pressure in male but not female offspring. While maternal DI increased both superoxide-mediated vasoconstriction and nitric oxide mediated vasodilation, the balance of these factors favored the development of hypertension in males and hypotension in females.

High Performance Au–Pd Supported on 3D Hybrid Strontium-Substituted Lanthanum Manganite Perovskite Catalyst for Methane Combustion

ACS Catalysis ◽  
2016 ◽  
Vol 6 (10) ◽  
pp. 6935-6947 ◽  
Author(s):  
Yuan Wang ◽  
Hamidreza Arandiyan ◽  
Jason Scott ◽  
Mandana Akia ◽  
Hongxing Dai ◽  
...  
Keyword(s):  
High Performance ◽  
Methane Combustion ◽  
Lanthanum Manganite ◽  
Perovskite Catalyst ◽  
Manganite Perovskite

Effects of excess manganese in lanthanum manganite perovskite on lowering oxidation light-off temperature for automotive exhaust gas pollutants

2011 ◽  
Vol 169 (1-3) ◽  
pp. 282-289 ◽  
Author(s):  
Parvaneh Esmaeilnejad-Ahranjani ◽  
Abbasali Khodadadi ◽  
Hessam Ziaei-Azad ◽  
Yadollah Mortazavi
Keyword(s):  
Lanthanum Manganite ◽  
Exhaust Gas ◽  
Automotive Exhaust ◽  
Manganite Perovskite

Thin film deposition of lanthanum manganite perovskite by the ALE process

1999 ◽  
Vol 9 (8) ◽  
pp. 1781-1784 ◽  
Author(s):  
Ola Nilsen ◽  
Marko Peussa ◽  
Helmer Fjellvåg ◽  
Lauri Niinistö ◽  
Arne Kjekshus
Keyword(s):  
Thin Film ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Lanthanum Manganite ◽  
Manganite Perovskite

Molten Salt Synthesis of Strontium-Doped Lanthanum Manganite Nanoparticles with Enhanced Catalytic Performance for Toluene Combustion

NANO ◽  
2016 ◽  
Vol 11 (05) ◽  
pp. 1650059 ◽  
Author(s):  
Yingliang Tian ◽  
Wencai Liu ◽  
Yongqiang Lu ◽  
Shibing Sun
Keyword(s):  
Molten Salt ◽  
Catalytic Performance ◽  
Lanthanum Manganite ◽  
Molten Salt Synthesis ◽  
Molar Ratio ◽  
Partial Substitution ◽  
Molten Salt Method ◽  
Promoting Effect ◽  
Manganite Nanoparticles ◽  
One Step

La[Formula: see text]SrxMnO[Formula: see text] (LSMO) and LaMnO[Formula: see text] (LMO) nanoparticle catalysts have been synthesized via a one-step molten salt route. It was found that the partial substitution of lanthanum by strontium had a promoting effect on the catalytic performance for toluene oxidation. Under the condition of toluene [Formula: see text][Formula: see text]ppm, toluene/O2[Formula: see text] and the space [Formula: see text][Formula: see text]mL/(g h), the temperature required for 50% and 90% toluene combustion conversion was 150[Formula: see text]C and 205[Formula: see text]C over LSMO catalyst, respectively. It is concluded that the oxygen vacancy, the molar ratio Mn[Formula: see text]/Mn[Formula: see text] on the surface and the specific surface area contribute to the improved catalytic performance of the LSMO nanoparticle materials via a one-step molten salt method.

scholarly journals Synthesis and Evaluation of ABO3 Perovskites (A=La and B=Mn, Co) with Stoichiometric and Over-stoichiometric Ratios of B/A for Catalytic Oxidation of Trichloroethylene

2018 ◽  
Vol 13 (1) ◽  
pp. 47 ◽  
Author(s):  
Razieh Alagheband ◽  
Sarah Maghsoodi ◽  
Amirhossein Shahbazi Kootenaei ◽  
Hassan Kianmanesh
Keyword(s):  
Catalytic Oxidation ◽  
Fixed Bed ◽  
Combustion Method ◽  
Catalytic Performance ◽  
Lanthanum Manganite ◽  
Fixed Bed Reactor ◽  
Bet Surface Area ◽  
Manganite Perovskite ◽  
Different Temperatures ◽  
Stoichiometric Ratios

In this contribution, perovskite catalysts (ABO3) were probed that site A and site B were occupied by lanthanum and transition metals of manganese or cobalt, respectively, with stoichiometric ratios as well as 20 % over-stoichiometric ratios of B/A. The perovskite samples were synthesized using a gel-combustion method and characterized by BET, XRD, SEM and O2-TPD analyses. After mounting in a fixed bed reactor, the catalysts were examined in atmospheric pressure conditions at different temperatures for oxidation of 1000 ppm trichloroethylene in the air. Evaluation of over-stoichiometric catalysts activity showed that the increased ratio of B/A in the catalysts compared to the stoichiometric one led to BET surface area, oxygen mobility, and consequently catalytic performance improvement. The lanthanum manganite perovskite with 20 % excess manganese yielded the best catalytic performance among the probed perovskites. Copyright © 2018 BCREC Group. All rights reservedReceived: 28th April 2017; Revised: 31st July 2017; Accepted: 4th August 2017; Available online: 22nd January 2018; Published regularly: 2nd April 2018How to Cite: Alagheband, R., Maghsoodi, S., Kootenaei, A.S., Kianmanesh, H. (2018). Synthesis and Evaluation of ABO3 Perovskites (A=La and B=Mn, Co) with Stoichiometric and Over-stoichiometric Ratios of B/A for Catalytic Oxidation of Trichloroethylene. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (1): 47-56 (doi:10.9767/bcrec.13.1.1188.47-56) 

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