Self-assembled dynamic perovskite composite cathodes for intermediate temperature solid oxide fuel cells

Shin, Jongmoon; Xu, Wen Ying; Zanella, Marco; Dawson, Karl; Саввин, С.Н.; Claridge, John B.; Rosseinsky, Matthew J.

doi:10.1038/nenergy.2016.214

Cited by 129 publications

(102 citation statements)

References 34 publications

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“…Constructing hybrids with interfacial interaction between the components has emerged as an effective way to improve the catalytic efficiency. [ 28–31 ] The hybrid structures can usually trigger some novel physical/chemical properties, which is crucial to promoting their electrocatalytic performance. On the one hand, the interface can serve as new catalytic actives with the optimized electronic structure through the existence of charge transfer and lattice stress between the multiple compounds.…”

Section: Figurementioning

confidence: 99%

Self‐Assembled Ruddlesden–Popper/Perovskite Hybrid with Lattice‐Oxygen Activation as a Superior Oxygen Evolution Electrocatalyst

Zhu

Lin

et al. 2020

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The oxygen evolution reaction (OER) is pivotal in multiple gas‐involved energy conversion technologies, such as water splitting, rechargeable metal–air batteries, and CO2/N2 electrolysis. Emerging anion‐redox chemistry provides exciting opportunities for boosting catalytic activity, and thus mastering lattice‐oxygen activation of metal oxides and identifying the origins are crucial for the development of advanced catalysts. Here, a strategy to activate surface lattice‐oxygen sites for OER catalysis via constructing a Ruddlesden–Popper/perovskite hybrid, which is prepared by a facile one‐pot self‐assembly method, is developed. As a proof‐of‐concept, the unique hybrid catalyst (RP/P‐LSCF) consists of a dominated Ruddlesden–Popper phase LaSr3Co1.5Fe1.5O10‐δ (RP‐LSCF) and second perovskite phase La0.25Sr0.75Co0.5Fe0.5O3‐δ (P‐LSCF), displaying exceptional OER activity. The RP/P‐LSCF achieves 10 mA cm−2 at a low overpotential of only 324 mV in 0.1 m KOH, surpassing the benchmark RuO2 and various state‐of‐the‐art metal oxides ever reported for OER, while showing significantly higher activity and stability than single RP‐LSCF oxide. The high catalytic performance for RP/P‐LSCF is attributed to the strong metal–oxygen covalency and high oxygen‐ion diffusion rate resulting from the phase mixture, which likely triggers the surface lattice‐oxygen activation to participate in OER. The success of Ruddlesden–Popper/perovskite hybrid construction creates a new direction to design advanced catalysts for various energy applications.

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Section: Figurementioning

confidence: 99%

Self‐Assembled Ruddlesden–Popper/Perovskite Hybrid with Lattice‐Oxygen Activation as a Superior Oxygen Evolution Electrocatalyst

Zhu

Lin

et al. 2020

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“…To overcome such solution limits, the formation of a composite is proposed, [18 ] in which the intimate interaction of phases can influence the electronic structure, in a similar way to doping. Additionally, the interaction between phases in a composite may influence physicochemical properties and therefore the electrochemical behavior of the material . Thanks to modern in operando and in situ characterization techniques, it is known that catalysts may undergo structural self‐reconstruction during oxidation or reduction, also impacting catalytic activity, where the generation of active surface species during the reaction (commonly metal hydroxide or oxide layers) may improve catalytic activity .…”

Section: Introductionmentioning

confidence: 99%

Bulk and Surface Properties Regulation of Single/Double Perovskites to Realize Enhanced Oxygen Evolution Reactivity

Sun

Guan

et al. 2020

ChemSusChem

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Perovskite‐based oxides have emerged as promising oxygen evolution reaction (OER) electrocatalysts. The performance is closely related to the lattice, electronic, and defect structure of the oxides, which determine surface and bulk properties and consequent catalytic activity and durability. Further, interfacial interactions between phases in a nanocomposite may affect bulk transportation and surface adsorption properties in a similar manner to phase doping except without solubility limits. Herein, we report the development of a single/double perovskite nanohybrid with limited surface self‐reconstruction capability as an OER electrocatalyst. Such superior performance arises from a structure that maintains high crystallinity post OER catalysis, in addition to forming an amorphous layer following the self‐reconstruction of a single perovskite structure during the OER process. In situ X‐ray absorption near edge structure spectroscopy and high‐resolution synchrotron‐based X‐ray diffraction reveal an amorphization process in the hybrid single/double perovskite oxide system that is limited in comparison to single perovskite amorphization, ensuring high catalytic activity.

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“…Solid oxide fuel cells (SOFCs) are high‐temperature (500–1000 °C) fuel cells that employ a solid ion‐conducting electrolyte, which are the cleanest, most efficient and versatile energy conversion systems. Due to their all‐solid‐state structure, high operational temperatures and no pollutions, SOFCs offer many advantages over conventional power generation systems in terms of its high efficiency (without Carnot limitation), reliability, size and fuel flexibilities as well as environmental friendliness . The most distinguishing advantages of SOFCs are the high efficiency (up to 60 %) and excellent fuel flexibility.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in the Development of Anode Materials for Solid Oxide Fuel Cells Utilizing Liquid Oxygenated Hydrocarbon Fuels: A Mini Review

Wang

Julião

et al. 2018

Energy Tech

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Solid oxide fuel cells (SOFCs) are the most widely used fuel cells due to their excellent fuel flexibility, high efficiency and low emissions. Although the liquid fuels are easier to handle and transport than hydrogen, their direct use in SOFC leads to serious performance deterioration because of the coke formation on the traditional Ni‐based cermet anodes. In this review, the advances in the development of coking resistant anodes and the new liquid fuels such as oxygenated hydrocarbons to solve the problem of coke formation with Ni‐based anodes are summarized. It is concluded that Ni‐based cermets are still the most promising anode materials and some targeted modifications are needed to improve the coking resistance. Several strategies to improve the coking resistance of Ni‐based anodes are highlighted. The aim of this review is to provide some helpful guidance and potential directions for the future design of anodes for SOFCs utilizing liquid oxygenated hydrocarbon fuels directly.

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Self-assembled dynamic perovskite composite cathodes for intermediate temperature solid oxide fuel cells

Cited by 129 publications

References 34 publications

Self‐Assembled Ruddlesden–Popper/Perovskite Hybrid with Lattice‐Oxygen Activation as a Superior Oxygen Evolution Electrocatalyst

Self‐Assembled Ruddlesden–Popper/Perovskite Hybrid with Lattice‐Oxygen Activation as a Superior Oxygen Evolution Electrocatalyst

Bulk and Surface Properties Regulation of Single/Double Perovskites to Realize Enhanced Oxygen Evolution Reactivity

Recent Advances in the Development of Anode Materials for Solid Oxide Fuel Cells Utilizing Liquid Oxygenated Hydrocarbon Fuels: A Mini Review

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