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5th Edition of

Chemistry World Conference

June 02-04, 2025 | Rome, Italy

Chemistry 2024

Development of a methodology for ferrites evaluation by WDXRF

Speaker at Chemistry World Conference 2024 - M Belen Gomez Mancebo
(CIEMAT, Spain
Title : Development of a methodology for ferrites evaluation by WDXRF

Abstract:

MFe2O4 (M: metal) (ferrites) are compounds widely employed in many industrial areas. The thermochemical water-splitting cycles, one of the most popular applications of these materials, have a significant potential to efficiently produce green hydrogen employing renewable energy resources. These thermochemical cycles can employ ferrites with spinel crystal structure. These cycles are known as “ferrite cycles” [1, 2].

Spinel ferrites are considered appropriate candidates for two-step water splitting processes. In these cycles, the starting ferrite is reduced in the endothermic first step (activation), releasing oxygen, and then reacted with water (hydrolysis) to produce hydrogen and the pristine ferrite. These spinel ferrites are subsequently recycled to the first step and can be used in several hydrogen production cycles. This is a green hydrogen production process as it uses H2O as a starting product and the final products obtained are H2 and O2.

 

In terms of cost, synthetic ferrites could be interesting candidates for scalable production. Different approaches of synthesis have been proposed, although co-precipitation method can be considered an easy and economical method for preparation of spinel ferrites [3]. In this study, cobalt ferrite was synthetized by co-precipitation method using stoichiometric amounts of metal nitrates [4, 5]. To evaluate the performance of this method of synthesis is important the characterization of the as-prepared materials. Elemental characterization is mandatory, in this case, to determine the amount of each element in the final compound and Wavelength Dispersive X-ray Fluorescence (WDXRF) is an appropriated instrumentation for this evaluation. A methodology was developed and validated using WDXRF technique, for the evaluation of ferrites substituted with different metals (cobalt and nickel). An analysis of the sources of analytical uncertainty was also performed.

 

Audience Take-Away:

  • The public will be able to learn how to develop a simple method of quantitative analysis by WDXRF.
  • Additionally, it will be provided the methodology to perform a validation of the method.
  • Furthermore, this study supply a solution for studying the associated uncertainties of the whole process.

Biography:

Dr. M. Belén Gómez Mancebo studied Chemistry at the Complutense University, Madrid (Spain) and graduated in 1994. Then, she joined the research group of Prof. Carmen Cámara at the department of Analytical Chemistry, at the Complutense University, Madrid (Spain). She received her PhD degree in 2002 at the same institution. After a three months postdoctoral fellowship supervised by Dr R. Morabito at the National Agency for New Technology, Energy and The Environment (ENEA), Italy, she worked during three years in PPQF, Alcalá de Henares University. Finally, she got a position as a senior scientist at CIEMAT, Madrid (Spain). She has published more than 40 research articles in SCI(E) journals.

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