2.19 Solid Oxides

Horoz, Sabit; Şahi̇n, Ömer

doi:10.1016/b978-0-12-809597-3.00242-x

Cited by 3 publications

(6 citation statements)

References 147 publications

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“…[3] A perovskite structure that conforms to the general formula ABO 3 typically features a cubic crystal structure consisting of a framework of BO 6 octahedra, which share corners in three dimensions. [4] The properties exhibited by perovskite oxides are mainly attributed to the structure of the BO 6 octahedral network and the state of the cations located at the B-site. [5] Brownmillerite materials belong to the family of perovskiterelated compounds and possess the chemical formula A 2 B 2 O 5 .…”

Section: Introductionmentioning

confidence: 99%

“…Perovskite oxides are common structures in inorganic chemistry that are often considered for use as catalysts and supports [3] . A perovskite structure that conforms to the general formula ABO 3 typically features a cubic crystal structure consisting of a framework of BO 6 octahedra, which share corners in three dimensions [4] . The properties exhibited by perovskite oxides are mainly attributed to the structure of the BO 6 octahedral network and the state of the cations located at the B‐site [5]…”

Section: Introductionmentioning

confidence: 99%

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Brownmillerite Calcium Ferrite, a Promising Perovskite‐Related Material in the Degradation of a Tight Dye under Ambient Conditions

Noori,

Malekzadeh,

Poater

2023

ChemistryOpen

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Evaluation of effective and low‐cost materials as catalysts to combat the threat of pollution is a significant and growing trend. With this aim, we have synthesized calcium ferrite brownmillerite by wet preparation approach as a catalyst for pollution. The structural analysis is established by the X‐ray diffraction of Ca2Fe2O5, whereas the tetrahedral and octahedral sites band stretching for ferrite specimen has been deduced using FTIR. The bandgap energy has been estimated by the Tauc relation (2.17 eV). Ca2Fe2O5 brownmillerite exhibits a BET surface area of 10 m2/g and a BJH pore volume of 0.121 cm3/g with the average particle size of 70 nm. Importantly, the alizarin Red S dye degradation has been studied using the prepared ferrite catalyst, under dark ambient conditions and without the presence of any acidic or basic additives. Degradation is also supported by both FTIR and TOC analysis. Surface properties of brownmillerite Ca2Fe2O5 have been characterized using electronic spectroscopy and CO2 temperature programmed desorption (TPD) analysis and revealed that the basic surface of brownmillerite Ca2Fe2O5 offers active sites that are suitable for degradation processes. All results show that the preparation of brownmillerite Ca2Fe2O5 via the Pechini method is suitable to produce fine surfaces and pores with nanosized particles.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Brownmillerite Calcium Ferrite, a Promising Perovskite‐Related Material in the Degradation of a Tight Dye under Ambient Conditions

Noori,

Malekzadeh,

Poater

2023

ChemistryOpen

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“…Contemporary power backup solutions for the intermittent supply, include a mix of batteries and generators that operates on diesel, propane, or gasoline. Though these systems are well-established, concerns about generator immediate start capability and carbon emissions have prompted a search for alternatives with high reliability, durability at a reasonable cost, and low carbon emissions [1]. Over the years, the literature on the practice of fuel cells is growing because of zero-emission on its operation and can be the possible alternative over other power backup technologies.…”

Section: Introductionmentioning

confidence: 99%

Parametric modeling of re-electrification by green hydrogen as an alternative to backup power

Subedi

Thapa

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Electricity backup systems are needed to address the temporary grid failure, short-term electricity supply at the locations without grids, power surges, and massive blackouts. These power backup technologies include a combination of batteries and generators operating mostly on fossil fuels. Concerns regarding instant start capability with generators, noise, and mainly due to carbon emissions have encouraged to look for alternatives with low carbon technologies based on renewable energy sources. Stored electricity from solar, wind and other renewable sources are emerging and cost-competitive alternatives to fossil fuels-based power backup systems. Due to the high energy density, unlimited production source, and easy storage and transportation, hydrogen is emerging as an effective and efficient energy carrier and its applications for an alternative to power supply systems. Hydrogen produced from the electrolysis of water by renewable electricity makes it green and has minimum carbon emissions among the other alternatives and operates in real-time startups with no mechanical noise. Fuel cell is a growing technology and has the potential to channelize hydrogen energy as an alternative to carbon-intensive power supply systems. In a fuel cell, hydrogen combines with oxygen and produces electricity. The fuel cell is a robust design with several parameters that control its operation and capacity. This paper identifies the parameter-based modeling approach to establish a connection of power demand with hydrogen production. A mathematical model for system sizing of hydrogen production and fuel cell for re-electrification for a reference case is developed.

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“…The anode is where the electrochemical oxidation of fuel takes place. An anode has an important role in oxidizing fuel and acts as a pathway for electrons during the oxidation reaction to transfer electrons to the existing collector [3]. The cathode is the positive side of the SOFC where oxygen molecules flow and are absorbed.…”

Section: Introductionmentioning

confidence: 99%

“…The operating temperature of an SOFC is determined by the electrolyte and separates the cathode and anode. The electrolyte also has the important role in preventing the diffusion between the fuel and oxidizing component; therefore, the electrolyte must be fully dense without open porosity [3]. The interconnect conducts the electrical current between two electrodes through the external circuit [2].…”

Section: Introductionmentioning

confidence: 99%

Perovskite-Type Oxide-Based Dual Composite Cathode for Solid Oxide Fuel Cells: A Short Review

Rahman

Azmi

2021

SSP

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A fuel cell is an electrochemical device that provides efficient power generation. Solid fuel oxide cell (SOFC) is an electrochemical device that generates electrical energy and heat from the gaseous state of fuel using an oxidant. SOFC is a highly efficient and environmentally friendly power generation technology that generates electrical energy from hydrogen gas, natural gas and other renewable fuel. The implementation of SOFCs is still facing challenges because their performance needs to be improved. Constructing cells with solid material alone is difficult because good electrical contacts between the components must be maintained. The concept of a dual composite cathode is important for the development of SOFC single cells. Introducing dual composite cathode can create an ideal cathode microstructure that can improve phase contiguity and interfacial coherence. This paper reviews the behaviour of a perovskite-type oxide-based dual composite cathode of SOFC for the selection of suitable materials and the preparation of a dual composite cathode.

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2.19 Solid Oxides

Cited by 3 publications

References 147 publications

Brownmillerite Calcium Ferrite, a Promising Perovskite‐Related Material in the Degradation of a Tight Dye under Ambient Conditions

Brownmillerite Calcium Ferrite, a Promising Perovskite‐Related Material in the Degradation of a Tight Dye under Ambient Conditions

Parametric modeling of re-electrification by green hydrogen as an alternative to backup power

Perovskite-Type Oxide-Based Dual Composite Cathode for Solid Oxide Fuel Cells: A Short Review

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