Largely Cu-doped LaCo1−Cu O3 perovskites for TWC: Toward new PGM-free catalysts

Glisenti, Antonella; Pacella, Michael S.; Guiotto, M.; Natile, Marta Maria; Canu, Paolo

doi:10.1016/j.apcatb.2015.06.017

Cited by 125 publications

(82 citation statements)

References 63 publications

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“…Bulk base‐metal oxides have been widely used as substitutes for PGMs in TWCs, as well as various catalytic applications, because of their high stability and versatility. The crystal structure of metal oxides plays an essential role in determining the catalytic activities .…”

Section: Introductionmentioning

confidence: 99%

Structure–Activity Relationship of Iron Oxides for NO Reduction in the Presence of C₃H₆, CO, and O₂

Ueda

Ohyama

Sawabe

et al. 2019

Chemistry A European J

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Spinel‐type NiFe2O4 exhibited the highest NO reduction activity among base‐metal oxides under simulated exhaust of a gasoline‐powered vehicle. The structure–activity relationship of iron oxides has been investigated through both experimental and computational studies. Spinel iron oxide (γ‐Fe2O3) exhibited a much higher NO reduction activity than that of iron oxide with other structures (α‐Fe2O3 and LaFeO3). Operando IR measurements clarified that the spinel structure facilitated the reaction between NOx and adsorbed oxidized hydrocarbon or cyanide species. The high reactivity of the spinel structure was ascribed to the high adsorption energy of NO, as elucidated by DFT calculations. Furthermore, molecular orbital calculations demonstrated that the local coordination structure of the spinel iron oxide induced the involvement of not only σ but also π orbitals during NO adsorption on Fe atoms. This work clarified the origin of the structure‐dependent activity of metal oxides, with a focus on their local coordination structures.

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Section: Introductionmentioning

confidence: 99%

Structure–Activity Relationship of Iron Oxides for NO Reduction in the Presence of C₃H₆, CO, and O₂

Ueda

Ohyama

Sawabe

et al. 2019

Chemistry A European J

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“…Glisenti et al . discovered that copper (Cu) doping of LaCoO 3 enhanced NO reduction activity . Pacella et al .…”

Section: Introductionmentioning

confidence: 99%

Removing NO_x, CO and HC from automobile exhaust based on chemical looping combustion

Luo

et al. 2019

J of Chemical Tech & Biotech

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Background To meet more stringent automobile exhaust emission standards without using platinum group metal three‐way catalysts (TWCs), two nonprecious metal oxide oxygen carriers, Cu10/Al90 and Ni10/Al90, were investigated for the simultaneous and thorough removal of nitrogen oxides (NOx), carbon monoxide (CO) and hydrocarbons (HC) from automobile exhaust. Results In oxidation reactions of the reductive oxygen carriers with NO, the reductive oxygen carriers were converted to the oxidative oxygen carriers and NO was simultaneously reduced to N2. Then, the oxidative oxygen carriers were regenerated to the reductive oxygen carriers with reducing gases, including CO, H2 and HC. At the same time, CO was converted to CO2, H2 was converted to H2O, and HC was converted to CO2 and H2O. The simultaneous removal of NOx, CO and HC could be achieved based on a chemical looping combustion mechanism. Compared with Ni10/Al90, Cu10/Al90 exhibited better performance for removing NO, CO and C3H6 from simulated automobile exhaust. However, the reductive Ni10/Al90 had an excellent steam reforming catalytic activity and was capable of converting residual C3H6 in the exhaust to harmless H2 and CO2. Conclusion Based on these findings, a novel chemical looping combustion process is proposed, in which the first oxygen carrier‐filling layer based on Cu10/Al90 removed NOx, CO and HC simultaneously, and the second oxygen carrier‐filling layer based on Ni10/Al90 removed residual NO and C3H6. © 2019 Society of Chemical Industry

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“…For example, the spinels have been studied as an active components of platinum‐group metal‐free automotive three‐way catalyst to purify nitrogen oxides (NO x ), unburned hydrocarbons (HC), and carbon monoxide (CO) in gasoline vehicle exhausts. Recently, Ueda et al reported that NiFe 2 O 4 with a spinel structure, which is obtained by substituting Ni for Fe atoms in Fe 3 O 4 , showed nearly 10 times better NO x reduction than a existing base metal catalyst LaCo 1 − x Cu x O 3 .In lithium ion battery material research, the substitution effect of different elements to the spinel structure materials such as LiTi 2 O 4 has been studied by considering the substituted elements as extrinsic lattice defects …”

Section: Introductionmentioning

confidence: 99%

Site‐sensitive X‐ray photoelectron spectroscopy of Fe₃O₄ by photoelectron diffraction

Hashimoto

Taguchi

Fukami

et al. 2018

Surface & Interface Analysis

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Fe 2p core‐level photoelectron spectra of magnetite were measured using soft X‐ray and hard X‐ray, and its emission angle dependence was investigated. The photoelectron diffraction pattern from different atomic sites differs because the atomic arrangement surrounding each site is different. By selecting the forward‐focusing‐peak (FFP) directions characteristic to each atomic site and measuring the kinetic energy dependence of the FFP intensities at the Fe 2p core‐level range, we succeed in detecting the variation of the peak intensity of Fe 2p core‐level spectra at different emission directions. This result, consistent with recent results, suggests that the lower‐binding‐energy peak of the Fe 2p core‐level spectrum may be assigned as the B site component.

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Largely Cu-doped LaCo1−Cu O3 perovskites for TWC: Toward new PGM-free catalysts

Cited by 125 publications

References 63 publications

Structure–Activity Relationship of Iron Oxides for NO Reduction in the Presence of C₃H₆, CO, and O₂

Structure–Activity Relationship of Iron Oxides for NO Reduction in the Presence of C₃H₆, CO, and O₂

Removing NO_x, CO and HC from automobile exhaust based on chemical looping combustion

Site‐sensitive X‐ray photoelectron spectroscopy of Fe₃O₄ by photoelectron diffraction

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Largely Cu-doped LaCo1−Cu O3 perovskites for TWC: Toward new PGM-free catalysts

Cited by 125 publications

References 63 publications

Structure–Activity Relationship of Iron Oxides for NO Reduction in the Presence of C3H6, CO, and O2

Structure–Activity Relationship of Iron Oxides for NO Reduction in the Presence of C3H6, CO, and O2

Removing NOx, CO and HC from automobile exhaust based on chemical looping combustion

Site‐sensitive X‐ray photoelectron spectroscopy of Fe3O4 by photoelectron diffraction

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Resources

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Structure–Activity Relationship of Iron Oxides for NO Reduction in the Presence of C₃H₆, CO, and O₂

Structure–Activity Relationship of Iron Oxides for NO Reduction in the Presence of C₃H₆, CO, and O₂

Removing NO_x, CO and HC from automobile exhaust based on chemical looping combustion

Site‐sensitive X‐ray photoelectron spectroscopy of Fe₃O₄ by photoelectron diffraction