La, Ca and Fe oxide perovskites: preparation, characterization and catalytic properties for methane combustion

Ciambelli, Paolo; Cimino, Stefano; Lisi, L.; Faticanti, Marco; Minelli, G.; Pettiti, Ida; Porta, P.

doi:10.1016/s0926-3373(01)00163-1

Cited by 228 publications

(135 citation statements)

References 19 publications

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“…Meanwhile, in the non stochiometric pure Ca 0.15 Zr 0.8 O 1.85 perovskite with large extent of oxygen vacancies, almost no changes with cooper content was detected. The TPR profiles shown in Figures 5.a) and 5.b) indicates that the copper free zirconates show no reduction peak, indicative of a non-reducible system, similar to LaFeO 3 [24,25]. Upon cooper addition, a larger effect in the reducibility is detected in the Ca series, compared to the Sr zirconates.…”

Section: Resultsmentioning

confidence: 95%

EFFECT OF COOPER ON THE CATALYTIC ACTIVITY FOR ACETYLACETATE COMBUSTION OF Ca1-x Cu xZrO3 AND Sr1-xCu xZrO3 PEROVSKITE-TYPE OXIDES

Pecchi¹,

Morales²

2013

J. Chil. Chem. Soc.

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The effect of lower Cu (≤ 30%) substitution on alkaline earth zirconate (A 1-x Cu x ZrO 3 ; A=Ca; Sr) perovskites prepared via a citrate route and calcined at 700°C has been investigated as catalysts for total acetyl acetate combustion. The thermal behaviour indicates a beneficial effect of Cu in order to decrease the decomposition temperature of Ca and Sr zirconates. The characterization of the solids by atomic absorption spectroscopy (AAS), BET area, SEM, XRD, O 2 -DTP and TPR indicates for the Sr series presence crystalline CuO phase in the copper strontium zirconates, meanwhile almost highly dispersed CuO is detected in the Ca series. Two effects explain the increases in the total acetylacetate combustion of Ca and Sr zirconates upon copper content. For one hand, in the Ca series, highly dispersed CuO phase, easier to be reduced increases the catalytic activity, meanwhile for the Sr series, a large extent of oxygen vacancies explains the catalytic effect.

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Section: Resultsmentioning

confidence: 95%

EFFECT OF COOPER ON THE CATALYTIC ACTIVITY FOR ACETYLACETATE COMBUSTION OF Ca1-x Cu xZrO3 AND Sr1-xCu xZrO3 PEROVSKITE-TYPE OXIDES

Pecchi¹,

Morales²

2013

J. Chil. Chem. Soc.

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“…The resulting precipitate was collected by suction filtration, washed with deionized water, ethanol, and diethyl ether, and then dried in air at 50°C. As references, the other precursors were prepared by decomposition method of polymer precursor (abbreviated as PP method), 26), 27) citrate route, 19), 20) and reverse homogenous precipitation method (RHP method). 28) The powder X-ray diffraction (XRD) patterns of the samples were collected on a Rigaku MiniFlex II diffractometer using Cu K¡ radiation.…”

Section: Materials and Instrumentsmentioning

confidence: 99%

Synthesis of perovskite-type oxide, LaFeO3, from coordination polymer precursor, La[Fe(CN)6]·5H2O

Yamaguchi

Wada

Sánchez-Rodríguez

et al. 2016

J. Ceram. Soc. Japan

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Perovskite-type oxide, LaFeO 3 , was prepared from coordination polymer precursor, La[Fe(CN) 6 ]·5H 2 O by calcination with the different two systems. In a muffle furnace system, the perovskite-type oxide was given by calcination at >500°C. The specific surface area of LaFeO 3 powder calcined at 500°C for 24 h was 18 m 2 ·g ¹1 , which was the largest among single phase perovskitetype oxides calcined in a muffle furnace. In a gas-flow system, the perovskite-type oxide was given by calcination at significantly low temperature (>250°C). The specific surface area of LaFeO 3 powder calcined at 300°C for 1 h in a gas-flow system was dependent on O 2 partial pressure.

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“…There has been some interest in examining the oxidation of carbon monoxide (CO) and hydrocarbons (C n H 2n+2 ) on perovskite-type oxides [1][2][3][4][5][6][7]. Because oxidation occurs on the outmost surface, perovskite-type oxides must be synthesized with good surface crystallinity (regularity of ions) and/or a large specific surface area.…”

Section: Introductionmentioning

confidence: 99%

CO oxidation on perovskite-type LaCoO3 synthesized using ethylene glycol and citric acid

Taguchi

Yamasaki

Itadani

et al. 2008

Catalysis Communications

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In order to synthesize perovskite-type LaCoO 3 with good surface crystallinity, the gel prepared by adding both ethylene glycol (EG) and citric acid (CA) to the aqueous solution of La(NO 3 ) 3 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O was fired at 600°C in air for 3 hours. The transmission electron microscopy (TEM) observation indicated that the particles of LaCoO 3 tended to have a uniform shape at EG/CA = 4. Although the specific surface area of LaCoO 3 synthesized using both EG and CA was slightly smaller than that of LaCoO 3 synthesized using only CA, the catalytic activity of CO oxidation became higher by adding EG.

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La, Ca and Fe oxide perovskites: preparation, characterization and catalytic properties for methane combustion

Cited by 228 publications

References 19 publications

EFFECT OF COOPER ON THE CATALYTIC ACTIVITY FOR ACETYLACETATE COMBUSTION OF Ca1-x Cu xZrO3 AND Sr1-xCu xZrO3 PEROVSKITE-TYPE OXIDES

EFFECT OF COOPER ON THE CATALYTIC ACTIVITY FOR ACETYLACETATE COMBUSTION OF Ca1-x Cu xZrO3 AND Sr1-xCu xZrO3 PEROVSKITE-TYPE OXIDES

Synthesis of perovskite-type oxide, LaFeO<sub>3</sub>, from coordination polymer precursor, La[Fe(CN)<sub>6</sub>]·5H<sub>2</sub>O

CO oxidation on perovskite-type LaCoO3 synthesized using ethylene glycol and citric acid

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La, Ca and Fe oxide perovskites: preparation, characterization and catalytic properties for methane combustion

Cited by 228 publications

References 19 publications

EFFECT OF COOPER ON THE CATALYTIC ACTIVITY FOR ACETYLACETATE COMBUSTION OF Ca1-x Cu xZrO3 AND Sr1-xCu xZrO3 PEROVSKITE-TYPE OXIDES

EFFECT OF COOPER ON THE CATALYTIC ACTIVITY FOR ACETYLACETATE COMBUSTION OF Ca1-x Cu xZrO3 AND Sr1-xCu xZrO3 PEROVSKITE-TYPE OXIDES

Synthesis of perovskite-type oxide, LaFeO<sub>3</sub>, from coordination polymer precursor, La[Fe(CN)<sub>6</sub>]&middot;5H<sub>2</sub>O

CO oxidation on perovskite-type LaCoO3 synthesized using ethylene glycol and citric acid

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Synthesis of perovskite-type oxide, LaFeO<sub>3</sub>, from coordination polymer precursor, La[Fe(CN)<sub>6</sub>]·5H<sub>2</sub>O