On A-doping strategy for tuning the TWC catalytic performance of perovskite based catalysts

Garbujo, Alberto; Pacella, Michael S.; Natile, Marta Maria; Guiotto, M.; Fabro, J.; Canu, Paolo; Glisenti, Antonella

doi:10.1016/j.apcata.2017.07.009

Cited by 36 publications

(28 citation statements)

References 51 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%

“…Bulk base-metal oxideshave been widely used as substitutes for PGMs in TWCs, [3][4][5][6] as well as various catalytic applications, [7][8][9] because of their high stability andv ersatility.The crystal structure of metal oxides plays an essential role in determining the catalytic activities. [10][11][12][13][14][15][16] Geometric structures arounda na ctive metal atom, such as interatomic distance, [10,11] connectivity, [10][11][12][13][14] or coordination structure, [14][15][16] are mainly discussed as factors that affect the catalytic activities of metal oxides.…”

Section: Introductionmentioning

confidence: 99%

“…[17][18][19] For instance, the strain of MO 6 octahedra in perovskite oxides varies the splitting of e g orbitals and impacts on the strength of metal-oxygen bondst od etermine the oxygen evolution reaction (OER)/oxygen reduction reaction( ORR) activity. [20] Also, somer esearchersf ound that distinct geometry coordination structure sites (distorted tetrahedrals ites, or corner sharing of AO 4 and BO 5 sites) favorably adsorbed reactioni ntermediate species, whiche nhanced the activity of catalysts with those sites. [21,22] Reports that elucidate the role of the local structurea re limited to water oxidation or the ORR, the mechanisms of which have been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

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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%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…Garbujo et al . found that the reactivity of perovskite‐based catalysts on NO reduction was not satisfactory . Glisenti et al .…”

Section: Introductionmentioning

confidence: 99%

“…17 Garbujo et al found that the reactivity of perovskite-based catalysts on NO reduction was not satisfactory. 18 Glisenti et al discovered that copper (Cu) doping of LaCoO 3 enhanced NO reduction activity. 19 Pacella et al observed that the activity of CuO/LaCoO 3 was greatly influenced by air:fuel ratios.…”

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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A mini‐review of intensified synthesis of 1st and 2nd generation biofuels in the presence of perovskite catalysts

Sai Bharadwaj,

Phillips,

Venkateshbabu

et al. 2024

Can J Chem Eng

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Enhancement of a sustainable environment through the choice of a selective catalyst with high activity, regeneration nature, and high stability is an important aspect to be focused on to achieve a high yield and maximum conversion of feedstock to biodiesel (1st generation biofuel), and also in the biomass valorization/pyrolysis (2nd generation biofuel synthesis). Depending on the nature of the catalyst and synthesis method adopted for biofuel production and biomass valorization, the variations in the process conditions, final yield, and conversion are varied accordingly. A prospective development and application of perovskite catalysts in the synthesis of 1st and 2nd generation biofuels using various process intensification strategies for the development of a clean and green environment is reviewed in this study. The synthesis of types of perovskite catalysts polycrystalline, nano‐sized, and powdered oxide are also discussed in this review. It is also concluded that, apart from other process parameters, molar ratio is one of the most influencing sensitive factors in the case of 1st generation biofuel synthesis, whereas during the production of 2nd generation biofuels, catalyst concentration and liquid–solid ratio are more significant process parameters that change based on the nature of the catalyst selected for the reaction.

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On A-doping strategy for tuning the TWC catalytic performance of perovskite based catalysts

Cited by 36 publications

References 51 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

A mini‐review of intensified synthesis of 1st and 2nd generation biofuels in the presence of perovskite catalysts

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On A-doping strategy for tuning the TWC catalytic performance of perovskite based catalysts

Cited by 36 publications

References 51 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

A mini‐review of intensified synthesis of 1st and 2nd generation biofuels in the presence of perovskite catalysts

Contact Info

Product

Resources

About

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