Search references:
1.
Zander, Judith; Wölfel, Julia Petra; Weiss, Morten; Jiang, Yiqun; Cheng, Ningyan; Zhang, Siyuan; Marschall, Roland
Medium- and High-Entropy Spinel Ferrite Nanoparticles via Low-Temperature Synthesis for the Oxygen Evolution Reaction Journal Article
In: Advanced Functional Materials, vol. 34, no. 4, pp. 2310179, 2023, ISSN: 1616-301X.
@article{Zander2024,
title = {Medium- and High-Entropy Spinel Ferrite Nanoparticles via Low-Temperature Synthesis for the Oxygen Evolution Reaction},
author = {Judith Zander and Julia Petra Wölfel and Morten Weiss and Yiqun Jiang and Ningyan Cheng and Siyuan Zhang and Roland Marschall},
url = {https://advanced.onlinelibrary.wiley.com/doi/abs/10.1002/adfm.202310179},
doi = {https://doi.org/10.1002/adfm.202310179},
issn = {1616-301X},
year = {2023},
date = {2023-11-15},
journal = {Advanced Functional Materials},
volume = {34},
number = {4},
pages = {2310179},
abstract = {Abstract High-entropy oxides are a material class that is currently receiving rapidly increasing attention due to the large variety in composition and the adjustable properties. Cooperative effects between different metal cations in the crystal structure in addition to entropic phase stabilization have proven beneficial for electrocatalytic applications. Most synthesis methods, however, require high synthesis temperatures and long times, and additionally only yield selected samples in good phase-purity. Furthermore, toxic or scarce elements are often present in large amounts. Herein, a non-aqueous microwave-assisted solvothermal synthesis is presented as a fast and low-temperature alternative for the fabrication of a wide range of earth-abundant ferrites (AFe2O4). Directly crystalline, phase-pure spinel ferrites of various compositions ranging from one to seven different A-ions are successfully obtained after only 30 min at 225 °C. A detailed characterization of their properties in relation to their composition is performed, and they are also employed for the alkaline oxygen evolution reaction. A partial replacement of Fe by Co moreover shows the high versatility of the synthesis that also allows for the simultaneous variation of the B-ion.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Abstract High-entropy oxides are a material class that is currently receiving rapidly increasing attention due to the large variety in composition and the adjustable properties. Cooperative effects between different metal cations in the crystal structure in addition to entropic phase stabilization have proven beneficial for electrocatalytic applications. Most synthesis methods, however, require high synthesis temperatures and long times, and additionally only yield selected samples in good phase-purity. Furthermore, toxic or scarce elements are often present in large amounts. Herein, a non-aqueous microwave-assisted solvothermal synthesis is presented as a fast and low-temperature alternative for the fabrication of a wide range of earth-abundant ferrites (AFe2O4). Directly crystalline, phase-pure spinel ferrites of various compositions ranging from one to seven different A-ions are successfully obtained after only 30 min at 225 °C. A detailed characterization of their properties in relation to their composition is performed, and they are also employed for the alkaline oxygen evolution reaction. A partial replacement of Fe by Co moreover shows the high versatility of the synthesis that also allows for the simultaneous variation of the B-ion.
2.
Zander, Judith; Weiss, Morten; Marschall, Roland
Fast and Facile Microwave Synthesis of Cubic CuFe2O4 Nanoparticles for Electrochemical CO2 Reduction Journal Article
In: Advanced Energy & Sustainability Research, 2023.
@article{Zander2023b,
title = {Fast and Facile Microwave Synthesis of Cubic CuFe2O4 Nanoparticles for Electrochemical CO2 Reduction},
author = {Judith Zander and Morten Weiss and Roland Marschall},
doi = {10.1002/aesr.202200184},
year = {2023},
date = {2023-01-25},
journal = {Advanced Energy & Sustainability Research},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
3.
Hammon, Sebastian; Klarner, Mara; Hörner, Gerald; Weber, Birgit; Friedrich, Martin; Senker, Jürgen; Kempe, Rhett; de Queiroz, Thiago Branquinho; Kümmel, Stephan
Combining Metal Nanoparticles with an Ir(III) Photosensitizer Journal Article
In: J. Phys. Chem. C, 2021.
@article{Hammon2021,
title = {Combining Metal Nanoparticles with an Ir(III) Photosensitizer},
author = {Sebastian Hammon and Mara Klarner and Gerald Hörner and Birgit Weber and Martin Friedrich and Jürgen Senker and Rhett Kempe and Thiago Branquinho de Queiroz and Stephan Kümmel},
doi = {10.1021/acs.jpcc.1c05756},
year = {2021},
date = {2021-11-12},
journal = {J. Phys. Chem. C},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
4.
Zehetmaier, Peter M; Zoller, Florian; Beetz, Michael; Plaß, Maximilian A; Häringer, Sebastian; Böller, Bernhard; Döblinger, Markus; Bein, Thomas; Fattakhova-Rohlfing, Dina
In: ChemNanoMat, vol. 6, no. 4, pp. 618-628, 2020.
@article{Zehetmaier2020,
title = {Nanocellulose-Mediated Transition of Lithium-Rich Pseudo-Quaternary Metal Oxide Nanoparticles into Lithium Nickel Cobalt Manganese Oxide (NCM) Nanostructures},
author = {Peter M Zehetmaier and Florian Zoller and Michael Beetz and Maximilian A Plaß and Sebastian Häringer and Bernhard Böller and Markus Döblinger and Thomas Bein and Dina Fattakhova-Rohlfing},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/cnma.201900748},
doi = {https://doi.org/10.1002/cnma.201900748},
year = {2020},
date = {2020-01-01},
journal = {ChemNanoMat},
volume = {6},
number = {4},
pages = {618-628},
abstract = {Abstract We report the syntheses of various compounds within the pseudo-quaternary system of the type LiwNixCoyMnzOδ (δ≤1) (pre-NCMs). Four different compositions of this compound were realized as ultrasmall crystalline nanoparticles of 1–4 nm diameter using low-temperature solvothermal reaction conditions in tert-butanol at only 170 °C. All of the pre-NCMs crystallize in the rock-salt structure and their lithium content is between 20% and 30% with respect to the complete metal content. By adjusting the lithium content to 105% stoichiometry in the solvothermal reaction, the pre-NCMs can easily react to the respective Li(NixCoyMnz)O2 (NCM) nanoparticles. Furthermore, nanosized desert-rose structured NCMs were obtained after addition of nanocellulose during the synthesis. By using the mixed metal monoxides as precursor for the NCMs, cation mixing between lithium and nickel is favored and gets more pronounced with increasing nickel content. The cation mixing effect compromises good electrochemical capacity retention, but the desert-rose structure nevertheless enables enhanced stability at high power conditions, especially for NCM333.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Abstract We report the syntheses of various compounds within the pseudo-quaternary system of the type LiwNixCoyMnzOδ (δ≤1) (pre-NCMs). Four different compositions of this compound were realized as ultrasmall crystalline nanoparticles of 1–4 nm diameter using low-temperature solvothermal reaction conditions in tert-butanol at only 170 °C. All of the pre-NCMs crystallize in the rock-salt structure and their lithium content is between 20% and 30% with respect to the complete metal content. By adjusting the lithium content to 105% stoichiometry in the solvothermal reaction, the pre-NCMs can easily react to the respective Li(NixCoyMnz)O2 (NCM) nanoparticles. Furthermore, nanosized desert-rose structured NCMs were obtained after addition of nanocellulose during the synthesis. By using the mixed metal monoxides as precursor for the NCMs, cation mixing between lithium and nickel is favored and gets more pronounced with increasing nickel content. The cation mixing effect compromises good electrochemical capacity retention, but the desert-rose structure nevertheless enables enhanced stability at high power conditions, especially for NCM333.
References (last update: Sept. 23, 2024):
2023
Zander, Judith; Wölfel, Julia Petra; Weiss, Morten; Jiang, Yiqun; Cheng, Ningyan; Zhang, Siyuan; Marschall, Roland
Medium- and High-Entropy Spinel Ferrite Nanoparticles via Low-Temperature Synthesis for the Oxygen Evolution Reaction Journal Article
In: Advanced Functional Materials, vol. 34, no. 4, pp. 2310179, 2023, ISSN: 1616-301X.
Abstract | Links | BibTeX | Tags: electrocatalysis, high-entropy oxide, nanoparticles, spinel, water oxidation
@article{Zander2024,
title = {Medium- and High-Entropy Spinel Ferrite Nanoparticles via Low-Temperature Synthesis for the Oxygen Evolution Reaction},
author = {Judith Zander and Julia Petra Wölfel and Morten Weiss and Yiqun Jiang and Ningyan Cheng and Siyuan Zhang and Roland Marschall},
url = {https://advanced.onlinelibrary.wiley.com/doi/abs/10.1002/adfm.202310179},
doi = {https://doi.org/10.1002/adfm.202310179},
issn = {1616-301X},
year = {2023},
date = {2023-11-15},
journal = {Advanced Functional Materials},
volume = {34},
number = {4},
pages = {2310179},
abstract = {Abstract High-entropy oxides are a material class that is currently receiving rapidly increasing attention due to the large variety in composition and the adjustable properties. Cooperative effects between different metal cations in the crystal structure in addition to entropic phase stabilization have proven beneficial for electrocatalytic applications. Most synthesis methods, however, require high synthesis temperatures and long times, and additionally only yield selected samples in good phase-purity. Furthermore, toxic or scarce elements are often present in large amounts. Herein, a non-aqueous microwave-assisted solvothermal synthesis is presented as a fast and low-temperature alternative for the fabrication of a wide range of earth-abundant ferrites (AFe2O4). Directly crystalline, phase-pure spinel ferrites of various compositions ranging from one to seven different A-ions are successfully obtained after only 30 min at 225 °C. A detailed characterization of their properties in relation to their composition is performed, and they are also employed for the alkaline oxygen evolution reaction. A partial replacement of Fe by Co moreover shows the high versatility of the synthesis that also allows for the simultaneous variation of the B-ion.},
keywords = {electrocatalysis, high-entropy oxide, nanoparticles, spinel, water oxidation},
pubstate = {published},
tppubtype = {article}
}
Abstract High-entropy oxides are a material class that is currently receiving rapidly increasing attention due to the large variety in composition and the adjustable properties. Cooperative effects between different metal cations in the crystal structure in addition to entropic phase stabilization have proven beneficial for electrocatalytic applications. Most synthesis methods, however, require high synthesis temperatures and long times, and additionally only yield selected samples in good phase-purity. Furthermore, toxic or scarce elements are often present in large amounts. Herein, a non-aqueous microwave-assisted solvothermal synthesis is presented as a fast and low-temperature alternative for the fabrication of a wide range of earth-abundant ferrites (AFe2O4). Directly crystalline, phase-pure spinel ferrites of various compositions ranging from one to seven different A-ions are successfully obtained after only 30 min at 225 °C. A detailed characterization of their properties in relation to their composition is performed, and they are also employed for the alkaline oxygen evolution reaction. A partial replacement of Fe by Co moreover shows the high versatility of the synthesis that also allows for the simultaneous variation of the B-ion.
Zander, Judith; Weiss, Morten; Marschall, Roland
Fast and Facile Microwave Synthesis of Cubic CuFe2O4 Nanoparticles for Electrochemical CO2 Reduction Journal Article
In: Advanced Energy & Sustainability Research, 2023.
Links | BibTeX | Tags: electrochemical, nanoparticles, synthesis
@article{Zander2023b,
title = {Fast and Facile Microwave Synthesis of Cubic CuFe2O4 Nanoparticles for Electrochemical CO2 Reduction},
author = {Judith Zander and Morten Weiss and Roland Marschall},
doi = {10.1002/aesr.202200184},
year = {2023},
date = {2023-01-25},
journal = {Advanced Energy & Sustainability Research},
keywords = {electrochemical, nanoparticles, synthesis},
pubstate = {published},
tppubtype = {article}
}
2021
Hammon, Sebastian; Klarner, Mara; Hörner, Gerald; Weber, Birgit; Friedrich, Martin; Senker, Jürgen; Kempe, Rhett; de Queiroz, Thiago Branquinho; Kümmel, Stephan
Combining Metal Nanoparticles with an Ir(III) Photosensitizer Journal Article
In: J. Phys. Chem. C, 2021.
Links | BibTeX | Tags: nanoparticles, photosensitizer
@article{Hammon2021,
title = {Combining Metal Nanoparticles with an Ir(III) Photosensitizer},
author = {Sebastian Hammon and Mara Klarner and Gerald Hörner and Birgit Weber and Martin Friedrich and Jürgen Senker and Rhett Kempe and Thiago Branquinho de Queiroz and Stephan Kümmel},
doi = {10.1021/acs.jpcc.1c05756},
year = {2021},
date = {2021-11-12},
journal = {J. Phys. Chem. C},
keywords = {nanoparticles, photosensitizer},
pubstate = {published},
tppubtype = {article}
}
2020
Zehetmaier, Peter M; Zoller, Florian; Beetz, Michael; Plaß, Maximilian A; Häringer, Sebastian; Böller, Bernhard; Döblinger, Markus; Bein, Thomas; Fattakhova-Rohlfing, Dina
In: ChemNanoMat, vol. 6, no. 4, pp. 618-628, 2020.
Abstract | Links | BibTeX | Tags: battery cathode materials, lithium nickel cobalt manganese oxide, nanoparticles, nanoscale-stabilized metastable phases
@article{Zehetmaier2020,
title = {Nanocellulose-Mediated Transition of Lithium-Rich Pseudo-Quaternary Metal Oxide Nanoparticles into Lithium Nickel Cobalt Manganese Oxide (NCM) Nanostructures},
author = {Peter M Zehetmaier and Florian Zoller and Michael Beetz and Maximilian A Plaß and Sebastian Häringer and Bernhard Böller and Markus Döblinger and Thomas Bein and Dina Fattakhova-Rohlfing},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/cnma.201900748},
doi = {https://doi.org/10.1002/cnma.201900748},
year = {2020},
date = {2020-01-01},
journal = {ChemNanoMat},
volume = {6},
number = {4},
pages = {618-628},
abstract = {Abstract We report the syntheses of various compounds within the pseudo-quaternary system of the type LiwNixCoyMnzOδ (δ≤1) (pre-NCMs). Four different compositions of this compound were realized as ultrasmall crystalline nanoparticles of 1–4 nm diameter using low-temperature solvothermal reaction conditions in tert-butanol at only 170 °C. All of the pre-NCMs crystallize in the rock-salt structure and their lithium content is between 20% and 30% with respect to the complete metal content. By adjusting the lithium content to 105% stoichiometry in the solvothermal reaction, the pre-NCMs can easily react to the respective Li(NixCoyMnz)O2 (NCM) nanoparticles. Furthermore, nanosized desert-rose structured NCMs were obtained after addition of nanocellulose during the synthesis. By using the mixed metal monoxides as precursor for the NCMs, cation mixing between lithium and nickel is favored and gets more pronounced with increasing nickel content. The cation mixing effect compromises good electrochemical capacity retention, but the desert-rose structure nevertheless enables enhanced stability at high power conditions, especially for NCM333.},
keywords = {battery cathode materials, lithium nickel cobalt manganese oxide, nanoparticles, nanoscale-stabilized metastable phases},
pubstate = {published},
tppubtype = {article}
}
Abstract We report the syntheses of various compounds within the pseudo-quaternary system of the type LiwNixCoyMnzOδ (δ≤1) (pre-NCMs). Four different compositions of this compound were realized as ultrasmall crystalline nanoparticles of 1–4 nm diameter using low-temperature solvothermal reaction conditions in tert-butanol at only 170 °C. All of the pre-NCMs crystallize in the rock-salt structure and their lithium content is between 20% and 30% with respect to the complete metal content. By adjusting the lithium content to 105% stoichiometry in the solvothermal reaction, the pre-NCMs can easily react to the respective Li(NixCoyMnz)O2 (NCM) nanoparticles. Furthermore, nanosized desert-rose structured NCMs were obtained after addition of nanocellulose during the synthesis. By using the mixed metal monoxides as precursor for the NCMs, cation mixing between lithium and nickel is favored and gets more pronounced with increasing nickel content. The cation mixing effect compromises good electrochemical capacity retention, but the desert-rose structure nevertheless enables enhanced stability at high power conditions, especially for NCM333.