Experimental evidences of ferromagnetism in undoped monoclinic zirconia

Pattanaik, Shreenu; Mishra, Dilip Kumar; Sharma, Manoj Kumar; Chatterjee, Ratnamala

doi:10.1016/j.inoche.2020.108042

Cited by 5 publications

(3 citation statements)

References 40 publications

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“…But interestingly, the Raman bands for monoclinic ZrO 2 are either absent or diffused. In nanocrystalline ZrO 2 , most oxygen vacancies act as media for magnetic interaction between Zr ions . The single charge oxygen vacancy reduces Zr 4+ to Zr 3+ , creating a Zr vacancy.…”

Section: Resultsmentioning

confidence: 99%

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Optimizing Hydrogen Production: Influence of Promoters in Methane Decomposition on Titania-Modified-Zirconia Supported Fe Catalyst

Al-Fatesh,

Vadodariya,

Bayazed

et al. 2024

ACS Omega

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This study addresses the pivotal challenge of hydrogen production through methane decomposition, offering a pathway to achieving clean energy goals. Investigating the utilization of titania-modified zirconia dual redox supports (10TiZr) in iron or doped iron-based catalysts for the CH 4 decomposition reaction, our research involves a thorough characterization process. This includes analyses of the surface area porosity, X-ray diffraction, Raman-infrared spectroscopy, and temperature-programmed reduction/oxidation. The observed sustained enhancement in catalytic activity over extended durations suggests the in situ formation of catalytically active sites. The introduction of Co or Ni into the 30Fe/10TiZr catalyst leads to the generation of a higher density of reducible species. Furthermore, the Ni-promoted 30Fe/10TiZr catalyst exhibits a lower crystallinity, indicating superior dispersion. Notably, the cobalt-promoted 30Fe/10TiZr catalyst achieves over 80% CH 4 conversion and H 2 yield within 3 h. Additionally, the Ni-promoted 30Fe/10TiZr catalyst attains a remarkable 87% CH 4 conversion and 82% H 2 yield after 3 h of the continuous process.

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Section: Resultsmentioning

confidence: 99%

“…In nanocrystalline ZrO 2 , most oxygen vacancies act as media for magnetic interaction between Zr ions. 26 The single charge oxygen vacancy reduces Zr 4+ to Zr 3+ , creating a Zr vacancy. Thermodynamically, the Zr vacancy is less favorable than the oxygen vacancy.…”

Section: Resultsmentioning

confidence: 99%

Optimizing Hydrogen Production: Influence of Promoters in Methane Decomposition on Titania-Modified-Zirconia Supported Fe Catalyst

Al-Fatesh,

Vadodariya,

Bayazed

et al. 2024

ACS Omega

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“…Mn-doped zirconia has also been reported to be a magnetic material [11,12]. Magnetic polarization has been achieved and studied also in Fe, Co and Ni doped zirconia [13], Ca and Mg doped [14], Ag doped [15] and even in undoped zirconia [16,17]. MnO 2 has been used as a catalyst [18] and an electrode [19].…”

Section: Introductionmentioning

confidence: 99%

Atomic layer deposited nanolaminates of zirconium oxide and manganese oxide from manganese(III)acetylacetonate and ozone

et al. 2021

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Atomic layer deposition method was used to grow thin films consisting of ZrO2 and MnOx layers. Magnetic and electric properties were studied of films deposited at 300 ºC. Some deposition characteristics of the manganese(III)acetylacetonate and ozone process were investigated, such as the dependence of growth rate on the deposition temperature and film crystallinity. All films were partly crystalline in their as-deposited state. Zirconium oxide contained cubic and tetragonal phases of ZrO2, while the manganese oxide was shown to consist of cubic Mn2O3 and tetragonal Mn3O4 phases. All the films exhibited nonlinear saturative magnetization with hysteresis, as well as resistive switching characteristics.

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Oxygen Vacancy Driven Room Temperature Ferromagnetism in Biogenic Synthesized Black Zirconia Nanoparticles

Selvaraj Janaki,

Jebakumar

2024

J Inorg Organomet Polym

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Experimental evidences of ferromagnetism in undoped monoclinic zirconia

Cited by 5 publications

References 40 publications

Optimizing Hydrogen Production: Influence of Promoters in Methane Decomposition on Titania-Modified-Zirconia Supported Fe Catalyst

Optimizing Hydrogen Production: Influence of Promoters in Methane Decomposition on Titania-Modified-Zirconia Supported Fe Catalyst

Atomic layer deposited nanolaminates of zirconium oxide and manganese oxide from manganese(III)acetylacetonate and ozone

Oxygen Vacancy Driven Room Temperature Ferromagnetism in Biogenic Synthesized Black Zirconia Nanoparticles

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