Achievements and trends of solid oxide fuel cells in clean energy field: a perspective review

Abdalla, Abdalla M.; Hossain, Shahzad; Petra, Pg M.I.; Ghasemi, Mostafa; Azad, Abul K.

doi:10.1007/s11708-018-0546-2

Cited by 44 publications

(34 citation statements)

References 121 publications

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“…SrMo 1− x M x O 4−δ (M = Fe and Cr, x = 0.1 and 0.2) scheelites were synthesized by the citrate method described in References [ 1 , 2 , 3 ]. Stoichiometric quantities of Sr(NO 3 ) 2 , (NH 4 ) 6 Mo 7 O 24 ·4H 2 O, C 2 FeO 4 ·2H 2 O, or r(NO 3 ) 3 ·9H 2 O were dissolved in citric acid with some drops of nitric acid.…”

Section: Methodsmentioning

confidence: 99%

“…Solid oxide fuel cells (SOFCs) are electrochemical devices that can offer clean and efficient power generation to almost any electrical power device in the world [ 1 ]. In this field, new SrMo 1−x M x O 3−δ (M = Fe and Cr; x = 0.1 and 0.2) perovskite materials have been recently prepared and characterized and perform successfully as anodes for solid-oxide fuel cells (SOFC) [ 2 , 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

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Topotactic Oxidation of Perovskites to Novel SrMo1-xMxO4−δ (M = Fe and Cr) Deficient Scheelite-Type Oxides

2020

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New polycrystalline SrMo1−xMxO4−δ (M = Fe and Cr) scheelite oxides have been prepared by topotactical oxidation, by annealing in air at 500 °C, from precursor perovskites with the stoichiometry SrMo1−xMxO3−δ (M = Fe and Cr). An excellent reversibility between the oxidized Sr(Mo,M)O4−δ scheelite and the reduced Sr(Mo,M)O3−δ perovskite phase accounts for the excellent behavior of the latter as anode material in solid-oxide fuel cells. A characterization by X-ray powder diffraction (XRD) and neutron powder diffraction (NPD) has been carried out to determine the crystal structure features. The scheelite oxides are tetragonal, space group I41/a (No. 88). The Rietveld-refinement from NPD data at room temperature shows evidence of oxygen vacancies in the structure, due to the introduction of Fe3+/Cr4+ cations in the tetrahedrally-coordinated B sublattice, where Mo is hexavalent. A thermal analysis of the reduced perovskite (SrMo1−xMxO3−δ) in oxidizing conditions confirms the oxygen stoichiometry obtained by NPD data; the stability range of the doped oxides, below 400–450 °C, is lower than that for the parent SrMoO3 oxide. The presence of a Mo4+/Mo5+ mixed valence in the reduced SrMo1−xMxO3−δ perovskite oxides confers greater instability against oxidation compared with the parent oxide. Finally, an XPS study confirms the surface oxidation states of Mo, Fe, and Cr in the oxidized samples SrMo0.9Fe0.1O4-δ and SrMo0.8Cr0.2O4-δ.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Topotactic Oxidation of Perovskites to Novel SrMo1-xMxO4−δ (M = Fe and Cr) Deficient Scheelite-Type Oxides

2020

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“…Utilizing methanol for H 2 production involves the use of an environmentally benign strategy for the next generation materials. In reading the current review, the authors believe readers will develop basic knowledge of future technologies based on PEMFCs and the application of H 2 fuel in various industrial and technological areas [80]. This kind of fuel cell can power households to small-scale industries if properly utilized.…”

Section: Future Research Perspectivesmentioning

confidence: 99%

Methanol Electrolysis for Hydrogen Production Using Polymer Electrolyte Membrane: A Mini-Review

Pethaiah¹,

Sadasivuni

Jayakumar

et al. 2020

Energies

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Hydrogen (H2) has attained significant benefits as an energy carrier due to its gross calorific value (GCV) and inherently clean operation. Thus, hydrogen as a fuel can lead to global sustainability. Conventional H2 production is predominantly through fossil fuels, and electrolysis is now identified to be most promising for H2 generation. This review describes the recent state of the art and challenges on ultra-pure H2 production through methanol electrolysis that incorporate polymer electrolyte membrane (PEM). It also discusses about the methanol electrochemical reforming catalysts as well as the impact of this process via PEM. The efficiency of H2 production depends on the different components of the PEM fuel cells, which are bipolar plates, current collector, and membrane electrode assembly. The efficiency also changes with the nature and type of the fuel, fuel/oxygen ratio, pressure, temperature, humidity, cell potential, and interfacial electronic level interaction between the redox levels of electrolyte and band gap edges of the semiconductor membranes. Diverse operating conditions such as concentration of methanol, cell temperature, catalyst loading, membrane thickness, and cell voltage that affect the performance are critically addressed. Comparison of various methanol electrolyzer systems are performed to validate the significance of methanol economy to match the future sustainable energy demands.

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“…Solid oxide fuel cells (SOFCs) have stimulated great interest in highly efficient energy conversion [4]. As electrochemical energy conversion devices, SOFCs can directly and electrochemically convert the chemical energy stored in fuels into clean electric power without the limitation of the Carnot cycle, which, in turn, leads to higher energy conversion efficiency (~60%) than traditional combustion engines [5]. For example, gas turbines are applied to produce electricity from coal or natural gas using the intermediary steam with lower energy efficiency ranging from 30-40% [6].…”

Section: Introductionmentioning

confidence: 99%

Direct-Hydrocarbon Proton-Conducting Solid Oxide Fuel Cells

Fan

Duan

2021

Sustainability

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Solid oxide fuel cells (SOFCs) are promising and rugged solid-state power sources that can directly and electrochemically convert the chemical energy into electric power. Direct-hydrocarbon SOFCs eliminate the external reformers; thus, the system is significantly simplified and the capital cost is reduced. SOFCs comprise the cathode, electrolyte, and anode, of which the anode is of paramount importance as its catalytic activity and chemical stability are key to direct-hydrocarbon SOFCs. The conventional SOFC anode is composed of a Ni-based metallic phase that conducts electrons, and an oxygen-ion conducting oxide, such as yttria-stabilized zirconia (YSZ), which exhibits an ionic conductivity of 10−3–10−2 S cm−1 at 700 °C. Although YSZ-based SOFCs are being commercialized, YSZ-Ni anodes are still suffering from carbon deposition (coking) and sulfur poisoning, ensuing performance degradation. Furthermore, the high operating temperatures (>700 °C) also pose challenges to the system compatibility, leading to poor long-term durability. To reduce operating temperatures of SOFCs, intermediate-temperature proton-conducting SOFCs (P-SOFCs) are being developed as alternatives, which give rise to superior power densities, coking and sulfur tolerance, and durability. Due to these advances, there are growing efforts to implement proton-conducting oxides to improve durability of direct-hydrocarbon SOFCs. However, so far, there is no review article that focuses on direct-hydrocarbon P-SOFCs. This concise review aims to first introduce the fundamentals of direct-hydrocarbon P-SOFCs and unique surface properties of proton-conducting oxides, then summarize the most up-to-date achievements as well as current challenges of P-SOFCs. Finally, strategies to overcome those challenges are suggested to advance the development of direct-hydrocarbon SOFCs.

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Achievements and trends of solid oxide fuel cells in clean energy field: a perspective review

Cited by 44 publications

References 121 publications

Topotactic Oxidation of Perovskites to Novel SrMo1-xMxO4−δ (M = Fe and Cr) Deficient Scheelite-Type Oxides

Topotactic Oxidation of Perovskites to Novel SrMo1-xMxO4−δ (M = Fe and Cr) Deficient Scheelite-Type Oxides

Methanol Electrolysis for Hydrogen Production Using Polymer Electrolyte Membrane: A Mini-Review

Direct-Hydrocarbon Proton-Conducting Solid Oxide Fuel Cells

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