Enhanced Thermochemical Water Splitting through Formation of Oxygen Vacancy in La0.6Sr0.4BO3−δ (B=Cr, Mn, Fe, Co, and Ni) Perovskites

Wang, Lulu; Al‐Mamun, Mohammad; Zhong, Yu Lin; Liu, Porun; Wang, Yun; Yang, Hua; Zhao, Huijun

doi:10.1002/cplu.201800178

Cited by 23 publications

(14 citation statements)

References 42 publications

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“…Furthermore, La 0.6 Sr 0.4 CoO 3 presents a lower onset temperature (~900 • C) than La 0.6 Sr 0.4 MnO 3 (~1020 • C) in similar conditions. The reported hydrogen production is also higher for La 0.6 Sr 0.4 CoO 3 (514 µmol/g) at 900 • C (with T red = 1300 • C) than for other La 0.6 Sr 0.4 BO 3 perovskites (Ni: 368 µmol/g; Fe: 349 µmol/g; Cr: 280 µmol/g and Mn: 234 µmol/g) [64].…”

Section: Other Perovskitesmentioning

confidence: 83%

“…The La0.8Sr0.2CoO3 perovskite presents a mass loss (1.5%) higher than La0.8Sr0.2MnO3 (0.1%), meaning a higher reduction extent [63]. Furthermore, La0.6Sr0.4CoO3 offers higher H2 production (514 µmol/g) than La0.6Sr0.4MnO3 (234 µmol/g) [64]. However, Orfila et al [63] tested the stability of this perovskite, highlighting a decrease of the production after four consecutive cycles.…”

Section: Lanthanum-cobalt Perovskitesmentioning

confidence: 98%

“…A compromise between maximum achievable oxygen non-stoichiometry and fuel production yield has to be considered, and the key outcomes may arise from an optimization of the perovskite's composition. The recent results presented above show that the high number of Wang et al [64] studied the impact of the cation (Cr, Mn, Fe, Ni, and Co) occupying the B-site of Sr-doped lanthanum perovskites. They reported that the La 0.6 Sr 0.4 CoO 3 perovskite can accommodate more oxygen vacancies than La 0.6 Sr 0.4 BO 3 perovskites (with B = Cr, Mn, Fe, and Ni), which is due to a low energy of oxygen vacancy formation.…”

Section: Other Perovskitesmentioning

confidence: 99%

“…Wang et al [64] studied the impact of the cation (Cr, Mn, Fe, Ni, and Co) occupying the B-site of Sr-doped lanthanum perovskites. They reported that the La0.6Sr0.4CoO3 perovskite can accommodate more oxygen vacancies than La0.6Sr0.4BO3 perovskites (with B = Cr, Mn, Fe, and Ni), which is due to a low energy of oxygen vacancy formation.…”

Section: Other Perovskitesmentioning

confidence: 99%

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Non-Stoichiometric Redox Active Perovskite Materials for Solar Thermochemical Fuel Production: A Review

et al. 2018

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Due to the requirement to develop carbon-free energy, solar energy conversion into chemical energy carriers is a promising solution. Thermochemical fuel production cycles are particularly interesting because they can convert carbon dioxide or water into CO or H2 with concentrated solar energy as a high-temperature process heat source. This process further valorizes and upgrades carbon dioxide into valuable and storable fuels. Development of redox active catalysts is the key challenge for the success of thermochemical cycles for solar-driven H2O and CO2 splitting. Ultimately, the achievement of economically viable solar fuel production relies on increasing the attainable solar-to-fuel energy conversion efficiency. This necessitates the discovery of novel redox-active and thermally-stable materials able to split H2O and CO2 with both high-fuel productivities and chemical conversion rates. Perovskites have recently emerged as promising reactive materials for this application as they feature high non-stoichiometric oxygen exchange capacities and diffusion rates while maintaining their crystallographic structure during cycling over a wide range of operating conditions and reduction extents. This paper provides an overview of the best performing perovskite formulations considered in recent studies, with special focus on their non-stoichiometry extent, their ability to produce solar fuel with high yield and performance stability, and the different methods developed to study the reaction kinetics.

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Section: Other Perovskitesmentioning

confidence: 83%

Section: Lanthanum-cobalt Perovskitesmentioning

confidence: 98%

Section: Other Perovskitesmentioning

confidence: 99%

Section: Other Perovskitesmentioning

confidence: 99%

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Non-Stoichiometric Redox Active Perovskite Materials for Solar Thermochemical Fuel Production: A Review

et al. 2018

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“…However, both their re-oxidation extent and production stability are low, making them unsuitable for thermochemical applications requiring numerous consecutive redox cycles [11]. Strategies for doping the lanthanum cobalt perovskites with Ca 2+ or Sr 2+ in A-site or with Cr and Fe in B-site have been investigated, but in all cases the fuel production decreased over cycles [10][11][12][13][14][15][16]. Lanthanum-manganite perovskites doped with strontium (A-site substitution) have been extensively studied for assessing their thermochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Two-step CO2 and H2O splitting using perovskite-coated ceria foam for enhanced green fuel production in a porous volumetric solar reactor

Haeussler

Abanades

Julbe

et al. 2020

Journal of CO2 Utilization

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Solar thermochemical cycles offer a viable option for the production of green synthetic fuels from CO 2 and H 2 O. Two-step cycles using redox materials consist of a high-temperature reduction creating oxygen vacancies, followed by a re-oxidation step with an oxidant gas (CO 2 and/or H 2 O), resulting in CO and/or H 2 production. This study focuses on the thermochemical performance in a solar reactor of a new kind of composite reactive material: reticulated ceria foam with uniform perovskite coating, forming a dual-phase layered heterostructure. La 0.5 Sr 0.5 Mn 0.9 Mg 0.1 O 3 (LSMMg) was selected as perovskite coating due to its high fuel productivity and thermochemical stability upon cycling. The perovskite coating improves the reduction step by increasing the reduction extent reached by the reactive material. The results revealed significant enhancement of oxygen exchange in the dual-phase composite material during reduction compared to individual components. The enhanced reduction extent had a beneficial effect on the oxygen release rate and the total amount of fuel produced by CO 2 and H 2 O splitting, whereas an adverse impact on the peak rate during H 2 /CO evolution was noticed. Decreasing the reduction pressure allowed enhancing the non-stoichiometric oxygen extent, while the re-oxidation extent increased with the inlet oxidant molar fraction. With suitable operating conditions (reduction at 0.100 bar and oxidation in 100% CO 2 ), the LSMMg-coated ceria foam produced a higher amount of fuel but with lower fuel production rate in comparison with pure ceria foam. This study points out the beneficial effects of composite redox materials consisting of LSMMg-coated ceria foam in enhancing the oxygen exchange capacity of ceria for solar fuel production.

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The role of the dopant and structural defects on the water absorption and on the H2 formation in the Al, Co and Cu doped SrTiO3 perovskite steps

Carlotto

2020

Applied Surface Science

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Enhanced Thermochemical Water Splitting through Formation of Oxygen Vacancy in La_0.6Sr_0.4BO_3−δ (B=Cr, Mn, Fe, Co, and Ni) Perovskites

Cited by 23 publications

References 42 publications

Non-Stoichiometric Redox Active Perovskite Materials for Solar Thermochemical Fuel Production: A Review

Non-Stoichiometric Redox Active Perovskite Materials for Solar Thermochemical Fuel Production: A Review

Two-step CO2 and H2O splitting using perovskite-coated ceria foam for enhanced green fuel production in a porous volumetric solar reactor

The role of the dopant and structural defects on the water absorption and on the H2 formation in the Al, Co and Cu doped SrTiO3 perovskite steps

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