Exsolution and electrochemistry in perovskite solid oxide fuel cell anodes: Role of stoichiometry in Sr(Ti,Fe,Ni)O3

Zhu, Tenglong; Troiani, Horacio Esteban; Mogni, L.; Santaya, Mariano; Han, Min−Koo; Barnett, Scott A.

doi:10.1016/j.jpowsour.2019.227077

Cited by 63 publications

(52 citation statements)

References 35 publications

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“…Perovskite-type materials as well as ceria-based electrodes deliver very promising results in terms of power density [4][5][6] and stability 7,8 . In most studies, a major difference between ceria and perovskite-type anodes is that perovskitetype materials are often used in a single phase functional layer, [9][10][11] while ceria-based anodes are usually used as a cermet with Ni to compensate the relatively low electronic conductivity 5,[12][13][14][15][16][17] . Noteworthy, in reducing conditions the electronic conductivity of many perovskites, such as SrTi 0.3 Fe 0.7 O 3-δ 18 is quite similar to that of Gd-doped ceria (GDC) [19][20][21] .…”

Section: Introductionmentioning

confidence: 99%

Excellent kinetics of single-phase Gd-doped ceria fuel electrodes in solid oxide cells

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Excellent kinetics of single-phase Gd-doped ceria fuel electrodes in solid oxide cells

et al. 2021

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“…One of the initial challenges of applying Ni exsolution in SOFCs was related to ensuring sufficient degree of exsolution, hence several studies focused on maximizing this by exploring the use of A-site deficient perovskite anodes in comparison to stoichiometric ones. Generally it was found that A-site deficiency can have a major role in enhancing electrochemical properties by increasing the degree of exolution [83,84] or to a larger number of nickel particles on the surface. [12] The effect of the nonexsolvable ion and its fraction on the B-site was also studied and it was demonstrated that the even partial replacement of Fe 3+ on the B-site with cations that enhance perovskite lattice stability, such as Mg 2+ /Ti 4+ , increases the structural stability but decreases the electric conductivity under fuel conditions (e.g., in the presence of ethanol, methanol).…”

Section: Nickelmentioning

confidence: 99%

Emergence and Future of Exsolved Materials

Kousi

Tang

Metcalfe

et al. 2021

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game-changing across multiple fields including but not limited to energy conversion and storage and catalysis, as evidenced by more than 300 papers having been published since the first reports of the method a decade ago. However, to the best of our knowledge only four reviews covering different application-related aspects of exsolution have been published so far. [17][18][19][20] Here, we review the trends that define the development of the exsolution concept in terms of design, tunability, functionality, and applicability. We analyze a set of 300 papers published so far on exsolution, to extract statistical information in terms of design elements (types of crystal structures, exsolvable and host lattice elements), synthesis routes, functionalities, and fields of application, including electrochemistry, catalysis photocatalysis, and other (discussed separately for noble and non-noble metal systems). The selected papers are listed and analyzed in the Supporting Information and the results are summarized in the infographic shown in Figure 3 and in Table 1 and based on these, we highlight exciting future directions of research in this fast-growing field. Figure 3. Exsolution infographic. Statistical analysis on a pool of 300 papers published on the field of exsolution since 2010.

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“…This opposite conclusion concerning the impact of A‐site non‐stoichiometry on exsolution may be related to different Sr content of the samples used by the authors. [ 191,201,202 ]…”

Section: Mechanism Of Metal Exsolutionmentioning

confidence: 99%

Progress of Exsolved Metal Nanoparticles on Oxides as High Performance (Electro)Catalysts for the Conversion of Small Molecules

Sun

Chen

Yin

et al. 2021

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Utilizing electricity and heat from renewable energy to convert small molecules into value‐added chemicals through electro/thermal catalytic processes has enormous socioeconomic and environmental benefits. However, the lack of catalysts with high activity, good long‐term stability, and low cost strongly inhibits the practical implementation of these processes. Oxides with exsolved metal nanoparticles have recently been emerging as promising catalysts with outstanding activity and stability for the conversion of small molecules, which provides new possibilities for application of the processes. In this review, it starts with an introduction on the mechanism of exsolution, discussing representative exsolution materials, the impacts of intrinsic material properties and external environmental conditions on the exsolution behavior, and the driving forces for exsolution. The performances of exsolution materials in various reactions, such as alkane reforming reaction, carbon monoxide oxidation, carbon dioxide utilization, high temperature steam electrolysis, and low temperature electrocatalysis, are then summarized. Finally, the challenges and future perspectives for the development of exsolution materials as high‐performance catalysts are discussed.

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Exsolution and electrochemistry in perovskite solid oxide fuel cell anodes: Role of stoichiometry in Sr(Ti,Fe,Ni)O3

Cited by 63 publications

References 35 publications

Excellent kinetics of single-phase Gd-doped ceria fuel electrodes in solid oxide cells

Excellent kinetics of single-phase Gd-doped ceria fuel electrodes in solid oxide cells

Emergence and Future of Exsolved Materials

Progress of Exsolved Metal Nanoparticles on Oxides as High Performance (Electro)Catalysts for the Conversion of Small Molecules

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