Effect of dopant addition on oxygen sorption properties of La-Sr-Co-Fe-O perovskite type oxide

Yin, Qinghua; Lin, Jerry Y S

doi:10.1007/s10450-006-0563-z

Cited by 20 publications

(8 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5 δ versus T is shown for the temperature cycles in air. LSCF has the lowest mass loss, while the Ba doped samples have the highest mass loss, in agreement with the findings of Yin and Lin [24]. LSB20CF furthermore starts to lose oxygen at a lower T than the other compositions…”

Section: Measurements In Airsupporting

confidence: 88%

See 1 more Smart Citation

Defect chemistry and oxygen transport of (La0.6Sr0.4−xMx)0.99Co0.2Fe0.8O3−δ, M=Ca (x=0.05, 0.1), Ba (x=0.1, 0.2), SrPart I: Defect chemistry

et al. 2009

View full text Add to dashboard Cite

Section: Measurements In Airsupporting

confidence: 88%

“…Solving simultaneously the Eqs. (10), (11), (12), (22), (24), (26) and (27) one may calculate all defect concentrations at a given pO2 for a given set of the parameters (K Ox,Fe , K dis , K mix ) of the model.…”

Section: Model Omentioning

confidence: 99%

Defect chemistry and oxygen transport of (La0.6Sr0.4−xMx)0.99Co0.2Fe0.8O3−δ, M=Ca (x=0.05, 0.1), Ba (x=0.1, 0.2), SrPart I: Defect chemistry

et al. 2009

View full text Add to dashboard Cite

“…As discussed earlier, the temperature-profile XRD results for BIO, BIC, BICL025, BICL05, and BIL show phase changes between the ordered brownmillerite and disordered cubic perovskite structures. Based on these results it was expected that the associated characteristic endothermic peaks on heating and exothermic peaks on cooling would be observed in the DSC for reversible order-disorder transition [23,31,32]. The endothermic peak was observed for the BIO sample at 925 • C on heating and the exothermic peak at 1090 • C on cooling, as shown in the DSC in the top right corner of Fig.…”

Section: Thermogravimetric Analysis and Dscmentioning

confidence: 78%

Preparation and characterization of Ce- and La-doped Ba2In2O5 as candidates for intermediate temperature (100–500°C) solid proton conductors

Janković

Wilkinson

Hui

2012

Journal of Power Sources

View full text Add to dashboard Cite

a b s t r a c tFive different compositions of brownmillerite materials, Ce-and La-doped, and undoped Ba 2 In 2 O 5 were synthesized via the solid-state reaction and the glycine-nitrate combustion process. Properties of the materials were characterized using XRD, HR-TEM, and TGA/DSC techniques. Conductivity measurements by AC impedance spectroscopy, performed in air and hydrogen-containing atmospheres, in the temperature range from 100• C to 500• C, were correlated to the properties of the materials and revealed the effects of dopant, microstructure, temperature and atmosphere on the total electrical conductivity of the materials. All compositions showed low conductivity in air. In hydrogen-containing atmospheres, while Ce-and La-doped Ba 2 In 2 O 5 showed low conductivity (4 × 10 −6 -3 × 10 −6 S cm −1 at 500 • C), undoped Ba 2 In 2 O 5 demonstrated a surprisingly high conductivity (between 0.02 S cm −1 and 0.7 S cm −1 in the temperature range from 300• C to 500• C), especially samples produced by the glycine-nitrate process. This finding creates potential opportunity for using Ba 2 In 2 O 5 as a proton-conductive material in intermediate temperature fuel cells.

show abstract

“…13,14 Studies from the US Department of Energy indicate that inorganic membranes could reduce the cost of oxygen production by 35%, 15 an important techno-economic aspect of cost reduction in carbon capture and storage processes. 30,31 In principle, stable perovskite materials sorption and desorption cycles generally have slow kinetics due to large temperature swings and their prospect as air separation units is not attractive. 19,20 However, perovskites tend to decompose in the presence of CO 2 leading to the formation of carbonates.…”

Section: Introductionmentioning

confidence: 99%

Copper aided exchange in high performance oxygen production by CuCo binary oxides for clean energy delivery

Motuzas

Costa

2015

J. Mater. Chem. A

View full text Add to dashboard Cite

Here we show the high oxygen production conferred by binary CuCo oxides. A feature of this material is the robustness to temperature cycling under the exposure of dry and wet air. Higher cobalt content favoured oxygen sorption, though at longer temperature swing cycles of 250 C between oxidation and reduction processes. A more desirable outcome was achieved with a high cobalt content in the presence of copper (Co 0.8 Cu 0.2 O x ) as the temperature cycle was almost halved to 125 C, thus leading to faster cycles of oxygen uptake and release, and higher oxygen production rates $5.0 wt%. The fast uptake was attributed to the reduction of cobalt(III) to cobalt(II) oxide whilst copper oxide enhanced the exchange of oxygen in cobalt oxide. The robustness of the binary CoCu oxides paves the pathway for oxygen production for the new generation of oxyfuel coal power plants.

show abstract

Effect of dopant addition on oxygen sorption properties of La-Sr-Co-Fe-O perovskite type oxide

Cited by 20 publications

References 29 publications

Defect chemistry and oxygen transport of (La0.6Sr0.4−xMx)0.99Co0.2Fe0.8O3−δ, M=Ca (x=0.05, 0.1), Ba (x=0.1, 0.2), SrPart I: Defect chemistry

Defect chemistry and oxygen transport of (La0.6Sr0.4−xMx)0.99Co0.2Fe0.8O3−δ, M=Ca (x=0.05, 0.1), Ba (x=0.1, 0.2), SrPart I: Defect chemistry

Preparation and characterization of Ce- and La-doped Ba2In2O5 as candidates for intermediate temperature (100–500°C) solid proton conductors

Copper aided exchange in high performance oxygen production by CuCo binary oxides for clean energy delivery

Contact Info

Product

Resources

About