Forming Ni-Fe and Co-Fe Bimetallic Structures on SrTiO3-Based SOFC Anode Candidates DOI Creative Commons

Kinga Kujawska,

Wojciech Koliński,

Beata Bochentyn

et al.

Fuels, Journal Year: 2024, Volume and Issue: 5(3), P. 564 - 573

Published: Sept. 20, 2024

The aim of this work was to verify the possibility forming Ni-Fe and Co-Fe alloys via topotactic ion exchange exsolution in Fe-infiltrated (La,Sr,Ce)0.9(Ni,Ti)O3-δ or (La,Sr,Ce)0.9(Co,Ti)O3-δ ceramics. For purpose, samples were synthesized using Pechini method then infiltrated with an iron nitrate solution. reduction process dry H2 forced exsolution, leading formation additional round-shape structures on surfaces grains. EDS scans XRD analysis confirmed bimetallic alloys, which suggests that these materials have great potential for further use as anode Solid Oxide Fuel Cells (SOFCs).

Language: Английский

Current and further trajectories in designing functional materials for solid oxide electrochemical cells: A review of other reviews DOI
Stanislav A. Baratov, Elena Filonova, Anastasiya Ivanova

et al.

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 94, P. 302 - 331

Published: March 8, 2024

Language: Английский

Citations

61
Perovskite oxides as electrocatalysts for water electrolysis: From crystalline to amorphous DOI Creative Commons
Hainan Sun, Xiaomin Xu,

Gao Chen

et al.

Carbon Energy, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 2, 2024

Abstract Crystalline perovskite oxides are regarded as promising electrocatalysts for water electrolysis, particularly anodic oxygen evolution reactions, owing to their low cost and high intrinsic activity. Perovskite with noncrystalline or amorphous characteristics also exhibit electrocatalytic performance toward electrochemical splitting. In this review, a fundamental understanding of the advantages crystalline, noncrystalline, is presented. Subsequently, recent progress in development advanced electrolysis by engineering breaking crystallinity reviewed, special focus on underlying structure–activity relationships. Finally, remaining challenges unsolved issues presented, an outlook briefly proposed future exploration next‐generation water‐splitting based oxides.

Language: Английский

Citations

18
Precise Regulation of In Situ Exsolution Components of Nanoparticles for Constructing Active Interfaces toward Carbon Dioxide Reduction DOI
Yao Luo, Chang Xu,

Jietao Wang

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Metal nanocatalysts supported on oxide scaffolds have been widely used in energy storage and conversion reactions. So far, the main research is still focused growth, density, size, activity enhancement of exsolved nanoparticles (NPs). However, lack precise regulation type composition NPs elements under reduction conditions has restricted architectural development situ exsolution systems. Herein, we propose a strategy to attain regulated distribution transition metals (Cu, Ni, Fe) Sr2Fe1.2Ni0.2Cu0.2Mo0.4O6–δ medium-entropy perovskite oxides by varying oxygen partial pressure (pO2) gradient mixture. At 800 °C, unitary Cu, binary Cu–Ni, ternary Cu–Ni–Fe are as pO2 decreases from high low. Combining experimental theoretical simulations, further corroborate that solid electrolysis cells with alloy clusters at CNF@SFO interface exhibit superior CO2 electrolytic performance. Our results provide tailored strategies for nanostructures nanointerfaces studying metal systems, including fuel electrode materials.

Language: Английский

Citations

6
Vanadium-assisted surface engineering of heterostructured cathode for enhanced protonic ceramic fuel cell performance DOI
Min Fu, Yang Gao, Mingming Zhang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159722 - 159722

Published: Jan. 1, 2025

Language: Английский

Citations

3
Magnetron sputtered bilayer composite (Mn, Co)3O4 coating to improve oxidation resistance and suppress elements diffusion for interconnects of solid oxide fuel cell DOI
Jingwen Mao, Enhua Wang, Haochen Dang

et al.

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 162660 - 162660

Published: Feb. 1, 2025

Language: Английский

Citations

1
Dual exsolution in silver‐functionalized layered and cubic perovskite oxides DOI Open Access
Francis Oseko, Sebastian Wachowski, Tadeusz Miruszewski

et al.

Journal of the American Ceramic Society, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 9, 2025

Abstract In this work, exsolution is achieved from both the A‐site and B‐site of (BaGd 0.8 La 0.2 ) 1‐ x Ag Co 2 O 6‐ δ (BaLa) CoFeO ( = 0.04, 0.1, 0.2) perovskites prepared via solid‐state sintering. Through synchrotron radiation powder X‐ray diffraction absorption spectroscopy techniques, chemical composition nanoparticles was determined to constitute CoO. Microstructural studies were done using scanning electron microscopy with varying sizes shapes present for respective annealing atmospheres temperatures. By applying a numerical model experimental data, it also established that changes in enthalpy oxygen vacancy formation decrease an increase silver dopant. From thermogravimetric measurements, single 0.95 0.10 perovskite had relatively higher water uptake than layered perovskite. The total electrical conductivity dry wet conditions decreased temperature range 300–800°C perovskites. results obtained relaxation measurements exhibit increased reduction reaction activity 6‐δ nanoparticles.

Language: Английский

Citations

1
Tailoring the Reversible Phase Transition of Perovskite Nanofiber Electrodes for High-Performance and Durable Reversible Solid Oxide Cells DOI Creative Commons
Chaofan Yin, Jiaming Yang,

Jiangyuan Feng

et al.

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: Feb. 17, 2025

Abstract Reversible solid oxide cells (RSOCs) are capable of converting various energy resources, between electricity and chemical fuels, with high efficiency flexibility, making them suitable for grid balancing renewable consumption. However, the practical application RSOCs is still limited by insufficient activity stability electrodes in different operating modes. Herein, a highly efficient symmetrical electrode composed La 0.3 Sr 0.6 Ti 0.1 Co 0.2 Fe 0.7 O 3− δ (LSTCF) nanofibers situ exsolved 3 7 nanoparticles developed boosting performance RSOCs. The reversible phase transition, have been confirmed combination experimental (e.g., transmission electron microscopy X-ray absorption fine structure) computational studies. Electrolyte-supported demonstrate excellent catalytic stability, achieving peak power density 0.98 W cm −2 fuel cell mode using H 2 as (or 0.53 CH 4 fuel) current 1.09 A at 1.4 V CO electrolysis 1.03 1.3 electrolysis) 800 °C while maintaining durability over 100 h.

Language: Английский

Citations

1
Cu-doped perovskite-type oxides: A structural deep dive and examination of their exsolution behaviour influenced by B-site doping DOI Creative Commons
Tobias Berger, Hedda Drexler, Thomas Ruh

et al.

Catalysis Today, Journal Year: 2024, Volume and Issue: 437, P. 114787 - 114787

Published: May 8, 2024

Perovskite-type oxides have gained significant attention in the scientific community due to their unique properties and potential applications. Their ability exsolve reducible B-site cations (e.g. Co, Ni, Cu) combined with flexibility regarding A-site composition allows for tailoring of novel catalytic materials. This study focuses on doped perovskite-type a general formula Nd0.6Ca0.4Fe1-xCuxO3 Pr0.6Ca0.4Fe1-xCuxO3 (x = 0.0, 0.03, 0.05, 0.10) use as catalyst Methanol Steam Reforming via exsolution catalytically active Cu nanoparticles. The atomic electronic structure, morphology, behaviour these materials were investigated experimentally density functional theory, specific emphasis impact doping varying content well choice element. Both parameters influenced crystal surface area, morphology was observed using in-situ XRD at DESY beamline P02.1 PETRA III, nanoparticles forming after reductive treatments host oxide surface. quantity size found be adjustable by selecting ion, B-site, reducing agent. Materials higher exhibited facilitated exsolution. Furthermore, promoted Nd element compared Pr. In conclusion, controlled introduces Cu-doped promising candidates developing systems. findings underscore importance fine-tuning (A-site element, amount dopant) achieve tailored nanoparticles, which is crucial rational material design. By leveraging this knowledge, catalysts finely tuned can created applications operational environments.

Language: Английский

Citations

6
Metal exsolution from perovskite-based anodes in solid oxide fuel cells DOI

Shasha Zhu,

Junde Fan,

Zongbao Li

et al.

Chemical Communications, Journal Year: 2023, Volume and Issue: 60(9), P. 1062 - 1071

Published: Dec. 22, 2023

Various effects in facilitating the exsolution of B-site cations for perovskite oxides.

Language: Английский

Citations

12
A Single Model for the Thermodynamics and Kinetics of Metal Exsolution from Perovskite Oxides DOI Creative Commons
Alexander Bonkowski, Matthew J. Wolf, Ji Wu

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(33), P. 23012 - 23021

Published: Aug. 8, 2024

Exsolution has emerged as an outstanding route for producing oxide-supported metal nanoparticles. For ABO3-perovskite oxides, various late transition-metal cations can be substituted into the lattice under oxidizing conditions and exsolved nanoparticles after reduction. A consistent comprehensive description of point-defect thermodynamics kinetics this phenomenon is lacking, however. Herein, supported by hybrid density-functional-theory calculations, we propose a single model that explains diverse experimental observations, such why substituent (but not host cations) exsolve from perovskite oxides upon reduction; different conditions; are embedded in surface; exsolution occurs surprisingly rapidly at relatively low temperatures; reincorporation species involves far longer times much higher temperatures. Our model's foundation reduced to neutral within Fermi level shifted upward bandgap sample The calculations also indicate unconventional influences oxygen vacancies A-site vacancies. thus provides fundamental basis improving existing, creating new, exsolution-generated catalysts.

Language: Английский

Citations

4