Spray-flame synthesis of La(Fe, Co)O3 nano-perovskites from metal nitrates

被引：56

作者：

Angel, Steven ^{[1
]}

Neises, Julian ^{[1
]}

Dreyer, Maik ^{[2
]}

Ortega, Klaus Friedel ^{[2
]}

Behrens, Malte ^{[2
,3
]}

Wang, Yuan ^{[4
]}

Arandiyan, Hamidreza ^{[5
]}

Schulz, Christof ^{[1
,3
]}

Wiggers, Hartmut ^{[1
,3
]}

机构：

[1] Univ Duisburg Essen, Inst Combust & Gas Dynam React Fluids, IVG, Duisburg, Germany

[2] Univ Duisburg Essen, Inorgan Chem, Fac Chem, Duisburg, Germany

[3] Univ Duisburg Essen, Ctr Nanointegrat, CENIDE, Duisburg, Germany

[4] Univ New South Wales, Fac Sci, Sch Chem, Sydney, NSW, Australia

[5] Univ Sydney, Sch Chem, Lab Adv Catalysis Sustainabil, Sydney, NSW, Australia

来源：

AICHE JOURNAL | 2020年 / 66卷 / 01期

关键词：

2-ethylhexanoic acid; CO oxidation; LaCoO3; LaFeO3; perovskite; spray-flame synthesis; OXIDE NANOPARTICLES; LACOO3; PEROVSKITE; PYROLYSIS; CATALYSIS; OXIDATION; COMBUSTION; MORPHOLOGY; REDUCTION; DROPLETS; ACIDS;

D O I：

10.1002/aic.16748

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Nano-sized perovskites were synthesized in a spray flame from nitrate precursors dissolved in ethanol and in ethanol/2-ethylhexanoic acid (2-EHA) mixtures. Experiments with ethanol led to a broad particle-size distribution and to the formation of undesired phases such as La2CoO4, La2O3, and Co3O4. The addition of 2-EHA can initiate micro explosions of the burning droplets and has been systematically investigated toward the formation of single-phase, high-surface-area LaCoO3 and LaFeO3 with a narrow size distribution. To investigate the effect of 2-EHA, temperature-dependent changes of the chemical composition of the precursor solutions were analyzed with ATR-FTIR between 23 and 70 degrees C. In all cases, the formation of esters was identified while in the solutions containing iron, additional formation of carboxylates was observed. The synthesized materials were characterized by BET SSA, XRD, SAED and EDX-TEM and their catalytic activity was analyzed, reaching 50% CO conversion at temperatures below 160 and 300 degrees C for LaCoO3 and LaFeO3, respectively.

引用

页数：12

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