Morphological, Structural and Hydrogen Storage Properties of LaCrO3 Perovskite-Type Oxides

Mohamed Amine Lahlou Nabil,Joan Josep Sunyol,Ioana Popa,Nouredine Fenineche

doi:10.3390/en15041463

Mohamed Amine Lahlou Nabil, Joan Josep Sunyol + Show 2 more

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https://doi.org/10.3390/en15041463

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Abstract

Recently, perovskite-type oxides have attracted researchers as new materials for solid hydrogen storage. This paper presents the performances of perovskite-type oxide LaCrO3 dedicated for hydrogen solid storage using both numerical and experimental methods. Ab initio calculations have been used here with the aim to investigate the electronic, mechanical and elastic properties of LaCrO3Hx (x = 0, 6) for hydrogen storage applications. Cell parameters, crystal structures and mechanical properties are determined. Additionally, the cohesive energy indicates the stability of the hydride. Furthermore, the mechanical properties showed that both compounds (before and after hydrogenation) are stable. The microstructure and storage capacity at different temperatures of these compounds have been studied. We have shown that storage capacities are around 4 wt%. The properties obtained from this type of hydride showed that it can be used for future applications. XRD analysis was conducted in order to study the structural properties of the compound. Besides morphological, thermogravimetric analysis was also conducted on the perovskite-type oxide. Finally, a comparison of these materials with other hydrides used for hydrogen storage was carried out.

Highlights

Hydrogen represents a clean source and very important energy vector
The aim of the present work is to study the hydrogen storage properties of the perovskite-type oxide LaCrO3, as there is no experimental study in the literature on perovskite-type oxide materials for hydrogen solid storage, with the exception of the perovskite hydrides mentioned above and the numerical study of Gencer et al [31]
70 study, ab-initio calculations were performed in order to study the perovskitetype oxide LaCrO3 for hydrogen storage applications

Summary

Introduction

Hydrogen represents a clean source and very important energy vector. Hydrogen has always been the focus of related research because of the high value of its energetic density. Hydrogen is primarily produced using two principal methods: steam reforming and electrolysis. Steam reforming is a high-temperature process in which steam reacts with hydrocarbon fuel to produce hydrogen. In order to produce hydrogen, there is a hightemperature process where steam reacts with hydrocarbon fuels called steam reforming. Hydrogen can be produced by reforming hydrocarbon fuels, such as natural gas, diesel, renewable liquid fuels and gasified cool or gasified biomass.

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