Dual oxidation state induced oxygen vacancies in Pr substituted BiFeO3 compounds: An effective material activation strategy to enhance the magnetic and visible light-driven photocatalytic properties

Bharathkumar, S.; Sakar, M.; Ponpandian, N.; Balakumar, S.

doi:10.1016/j.materresbull.2017.12.029

Cited by 37 publications

(14 citation statements)

References 52 publications

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“…In the case of Cu–ZnO/Pr 2 O 3 -NS, stronger defect peaks mirror the formation of more oxygen vacancies. Additionally, the peak associated with the exciton recombination at oxygen vacancies in the PL spectra (Figure S10) also demonstrates that the Cu–ZnO/Pr 2 O 3 -NS sample possesses the highest quantity of oxygen vacancies, well-consistent with XPS and Raman results …”

Section: Resultssupporting

confidence: 75%

Efficient Role of Nanosheet-Like Pr₂O₃ Induced Surface-Interface Synergistic Structures over Cu-Based Catalysts for Enhanced Methanol Production from CO₂ Hydrogenation

Zhang

Liu²,

Fan

et al. 2022

ACS Appl. Mater. Interfaces

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In a complex heterogeneous metal-catalyzed reaction process, unique cooperative effects between metal sites and surface-interface active sites, as well as favorable synergy between surface-interface active sites, can play crucial roles in improving their catalytic performances. In this work, a ZnO-modified Cu-based catalyst over defect-rich Pr2O3 nanosheets for high-efficiency CO2 hydrogenation to produce methanol was successfully constructed. It was demonstrated that an as-fabricated nanosheet-like Cu-based catalyst presented several structural advantages including the formation of highly dispersive Cu0 sites and the coexistence of abundant defective Pr3+–Vo–Pr3+ structures (Vo: oxygen vacancy) and interfacial Cu–O–Pr sites. Combining structural characterization and catalytic reaction results with density functional theory calculations, it was clearly unveiled that the synergy between surface defective structures and Cu–Pr2O3 interfaces over the catalyst remarkably promoted the adsorption of CO2 and CO intermediate, thus boosting the CO2 hydrogenation simultaneously via both the formate intermediate pathway and the intense reverse water–gas shift reaction-derived CO hydrogenation pathway, along with a high space-time yield of methanol of 0.395 gMeOH·gcat –1·h–1 under mild reaction conditions (260 °C and 3.0 MPa). The study provides a new strategy to construct high-performance Cu-based catalysts for high-efficiency CO2 hydrogenation to produce methanol and a deep understanding of the promotional roles of synergy between surface-interface active sites in the CO2 hydrogenation.

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Section: Resultssupporting

confidence: 75%

Efficient Role of Nanosheet-Like Pr₂O₃ Induced Surface-Interface Synergistic Structures over Cu-Based Catalysts for Enhanced Methanol Production from CO₂ Hydrogenation

Zhang

Liu²,

Fan

et al. 2022

ACS Appl. Mater. Interfaces

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“…Thus, only the ilmenite polymorph has presented a good potential for photocatalytic purposes, while the corundum and LNO polymorphs are indicated only for electronic or other applications. This behavior was widely reported for BiFeO 3 material, once such material presented low stability of the charge carriers resulting in a high recombination rate 71‐77 . It is noteworthy that the effective mass values are affected by several features, such as chemical composition, structural defects, and the symmetry of the material.…”

Section: Resultssupporting

confidence: 66%

“…This behavior was widely reported for BiFeO 3 material, once such material presented low stability of the charge carriers resulting in a high recombination rate. [71][72][73][74][75][76][77] It is noteworthy that the effective mass values are affected by several features, such as chemical composition, structural defects, and the symmetry of the material. In particular, the materials investigated in this work present the same chemical composition and very similar symmetries due to the rhombohedral space group.…”

Section: Electronic Optical and Photocatalytic Propertiesmentioning

confidence: 99%

A broad theoretical investigation of R‐3, R3c, and R‐3c polymorphs of FeCrO₃

Lacerda

Lázaro

2020

J Am Ceram Soc

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The FeCrO3 is a semiconductor founded in nature as a mineral. Such material exists in three different polymorphs whose properties have been few studied. Therefore, this work has performed a broad computational investigation based on a DFT approach aiming to present the nonreported properties; such as optoelectronic, photocatalytic, and phase stability under pressure. The results have indicated that the magnetic properties of the bulk for the three polymorphs present an antiferromagnetic overall ordering, being the residual magnetism experimentally reported caused by a morphology magnetization and not by a specific surface outcrop. Likewise, as electronic as photocatalytic properties predictions have suggested a bandgap in agreement to interest for applications in chemical processes; however, but the corundum phase has shown a significant photocatalytic activity due to charge carriers’ stability. In particular, the R3c phase of the FeCrO3 has presented a multiferroic behavior, since a magnetoelectric coupling is expected. From all the results exposed in this work, we propose that the FeCrO3 material can be suggested as a high‐level candidate for technological purposes.

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“…to ferromagnetic. 84,85 Pr(OH) 3 nanowire bundles exhibit ferromagnetic behavior at room temperature. 86 Pr 6 O 11 can enhance the catalyst performance for ethanol electrooxidation.…”

Section: Characteristic Propertiesmentioning

confidence: 99%

“…Pr 3+ ion with a magnetic moment of 3.5 μ B has been used to tune antiferromagnetic hosts, such as BiFeO 3 , from magnetic to ferromagnetic. , Pr(OH) 3 nanowire bundles exhibit ferromagnetic behavior at room temperature …”

Section: Characteristics Of Rare-earth Elementsmentioning

confidence: 99%

Rare-Earth Doping in Nanostructured Inorganic Materials

et al. 2022

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Impurity doping is a promising method to impart new properties to various materials. Due to their unique optical, magnetic, and electrical properties, rare-earth ions have been extensively explored as active dopants in inorganic crystal lattices since the 18th century. Rare-earth doping can alter the crystallographic phase, morphology, and size, leading to tunable optical responses of doped nanomaterials. Moreover, rare-earth doping can control the ultimate electronic and catalytic performance of doped nanomaterials in a tunable and scalable manner, enabling significant improvements in energy harvesting and conversion. A better understanding of the critical role of rare-earth doping is a prerequisite for the development of an extensive repertoire of functional nanomaterials for practical applications. In this review, we highlight recent advances in rare-earth doping in inorganic nanomaterials and the associated applications in many fields. This review covers the key criteria for rare-earth doping, including basic electronic structures, lattice environments, and doping strategies, as well as fundamental design principles that enhance the electrical, optical, catalytic, and magnetic properties of the material. We also discuss future research directions and challenges in controlling rare-earth doping for new applications.

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Dual oxidation state induced oxygen vacancies in Pr substituted BiFeO3 compounds: An effective material activation strategy to enhance the magnetic and visible light-driven photocatalytic properties

Cited by 37 publications

References 52 publications

Efficient Role of Nanosheet-Like Pr₂O₃ Induced Surface-Interface Synergistic Structures over Cu-Based Catalysts for Enhanced Methanol Production from CO₂ Hydrogenation

Efficient Role of Nanosheet-Like Pr₂O₃ Induced Surface-Interface Synergistic Structures over Cu-Based Catalysts for Enhanced Methanol Production from CO₂ Hydrogenation

A broad theoretical investigation of R‐3, R3c, and R‐3c polymorphs of FeCrO₃

Rare-Earth Doping in Nanostructured Inorganic Materials

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Dual oxidation state induced oxygen vacancies in Pr substituted BiFeO3 compounds: An effective material activation strategy to enhance the magnetic and visible light-driven photocatalytic properties

Cited by 37 publications

References 52 publications

Efficient Role of Nanosheet-Like Pr2O3 Induced Surface-Interface Synergistic Structures over Cu-Based Catalysts for Enhanced Methanol Production from CO2 Hydrogenation

Efficient Role of Nanosheet-Like Pr2O3 Induced Surface-Interface Synergistic Structures over Cu-Based Catalysts for Enhanced Methanol Production from CO2 Hydrogenation

A broad theoretical investigation of R‐3, R3c, and R‐3c polymorphs of FeCrO3

Rare-Earth Doping in Nanostructured Inorganic Materials

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Product

Resources

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Efficient Role of Nanosheet-Like Pr₂O₃ Induced Surface-Interface Synergistic Structures over Cu-Based Catalysts for Enhanced Methanol Production from CO₂ Hydrogenation

Efficient Role of Nanosheet-Like Pr₂O₃ Induced Surface-Interface Synergistic Structures over Cu-Based Catalysts for Enhanced Methanol Production from CO₂ Hydrogenation

A broad theoretical investigation of R‐3, R3c, and R‐3c polymorphs of FeCrO₃