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Yuan M, Wang Z, Gao J, Hao H, Lv Z, Lou X, Xu L, Li J, Wei B. Turning bad into good: A medium-entropy double perovskite oxide with beneficial surface reconstruction for active and robust cathode of solid oxide fuel cells. J Colloid Interface Sci 2024; 672:787-796. [PMID: 38870769 DOI: 10.1016/j.jcis.2024.06.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Revised: 06/05/2024] [Accepted: 06/05/2024] [Indexed: 06/15/2024]
Abstract
The cathodes of solid oxide fuel cells (SOFCs) often suffer from detrimental cation segregations and associated impurities poisoning, leading to insufficient electroactivity and poor stability. Here we developed a medium-entropy double perovskite GdBa(Co1.2Mn0.2Fe0.2Ni0.2Cu0.2)O5-δ (ME-GBCO) for promising SOFC cathode. The increased configuration entropy can effectively tailor the surface composition with in situ formed active BaCoO3-δ (BCO) species, rather than inert and deleterious BaOx segregation on parent GdBaCo2O5-δ (GBCO) surface. Accordingly, the layered ME-GBCO cathode with beneficial surface reconstruction exhibited not only high oxygen reduction activity but excellent durability against CO2 impurity, enabling it a very attractive cathode for intermediate temperature SOFCs (IT-SOFCs). Our study provides a new idea for development of efficient and durable cathodes via configurational entropy induced rational surface reconstruction.
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Affiliation(s)
- Mengke Yuan
- School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China; School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Zhe Wang
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Juntao Gao
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Hongru Hao
- School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China; School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Zhe Lv
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Xiutao Lou
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Lingling Xu
- School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China.
| | - Jingwei Li
- Faculty of Engineering Science, University of Bayreuth, 95447 Bayreuth, Germany
| | - Bo Wei
- School of Physics, Harbin Institute of Technology, Harbin 150001, China.
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2
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Kala J, Anjum U, Mani BK, Haider MA. Controlling surface cation segregation in a double perovskite for oxygen anion transport in high temperature energy conversion devices. Phys Chem Chem Phys 2023; 25:22022-22031. [PMID: 37555332 DOI: 10.1039/d3cp00827d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Double perovskite materials have shown promising applications as an electrode in solid oxide fuel cells and Li-air batteries for oxygen reduction, evolution, and transport. However, degradation of the material due to cation migration to the surface, forming secondary phases, poses an existential bottleneck in materials development. Herein, a theoretical approach combining density functional theory and molecular dynamics simulations is presented to study the Ba-cation segregation in a double perovskite NdBaCo2O5+δ. Solutions to circumvent segregation at the molecular level are presented in two different forms by applying strain and introducing dopants in the structure. On applying compressive strain or Ca as a dopant in the NBCO structure, segregation is estimated to reduce significantly. A more direct way of estimating cation segregation is proposed in MD simulations, wherein the counting of the cations migrating from the sub-surface layers to the surface provided a reliable theoretical assessment of the level of cation segregation.
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Affiliation(s)
- Jyotsana Kala
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110016, Delhi, India.
| | - Uzma Anjum
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110016, Delhi, India.
| | - B K Mani
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110016, Delhi, India.
| | - M Ali Haider
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110016, Delhi, India.
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Venkatesha A, Seth D, Varma RM, Das S, Agarwal M, Haider MA, Bhattacharyya AJ. Probing the Na
+
/Li
+
‐ions Insertion Mechanism in an Aqueous Mixed‐Ion Rechargeable Batteries with NASICON‐NaTi
2
(PO
4
)
3
Anode and Olivine‐LiFePO
4
Cathode. ChemElectroChem 2022. [DOI: 10.1002/celc.202201013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Akshatha Venkatesha
- Solid State and Structural Chemistry Unit Indian Institute of Science Bengaluru 560012 India
| | - Deepak Seth
- Renewable Energy and Chemicals Laboratory Indian Institute of Technology Delhi Hauz Khas, New Delhi 110016 India
| | - Rahul Mahavir Varma
- Solid State and Structural Chemistry Unit Indian Institute of Science Bengaluru 560012 India
| | - Suman Das
- Solid State and Structural Chemistry Unit Indian Institute of Science Bengaluru 560012 India
| | - Manish Agarwal
- Renewable Energy and Chemicals Laboratory Indian Institute of Technology Delhi Hauz Khas, New Delhi 110016 India
| | - M. Ali Haider
- Renewable Energy and Chemicals Laboratory Indian Institute of Technology Delhi Hauz Khas, New Delhi 110016 India
| | - Aninda J. Bhattacharyya
- Solid State and Structural Chemistry Unit Indian Institute of Science Bengaluru 560012 India
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Triple Perovskite Nd1.5Ba1.5CoFeMnO9−δ-Sm0.2Ce0.8O1.9 Composite as Cathodes for the Intermediate Temperature Solid Oxide Fuel Cells. MATERIALS 2022; 15:ma15103663. [PMID: 35629687 PMCID: PMC9145612 DOI: 10.3390/ma15103663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/16/2022] [Accepted: 05/17/2022] [Indexed: 11/17/2022]
Abstract
Triple perovskite has been recently developed for the intermediate temperature solid oxide fuel cell (IT-SOFC). The performance of Nd1.5Ba1.5CoFeMnO9−δ (NBCFM) cathodes for IT-SOFC is investigated in this work. The interfacial polarization resistance (RP) of NBCFM is 1.1273 Ω cm2~0.1587 Ω cm2 in the range of 700–800 °C, showing good electrochemical performance. The linear thermal expansion coefficient of NBCFM is 17.40 × 10−6 K−1 at 40–800 °C, which is significantly higher than that of the electrolyte. In order to further improve the electrochemical performance and reduce the thermal expansion coefficient (TEC) of NBCFM, Ce0.8Sm0.2O2−δ (SDC) is mixed with NBCFM to prepare an NBCFM-xSDC composite cathode (x = 0, 10, 20, 30, 40 wt.%). The thermal expansion coefficient decreases monotonically from 17.40 × 10−6 K−1 to 15.25 × 10−6 K−1. The surface oxygen exchange coefficient of NBCFM-xSDC at a given temperature increases from 10−4 to 10−3 cm s−1 over the po2 range from 0.01 to 0.09 atm, exhibiting fast surface exchange kinetics. The area specific resistance (ASR) of NBCFM-30%SDC is 0.06575 Ω cm2 at 800 °C, which is only 41% of the ASR value of NBCFM (0.15872 Ω cm2). The outstanding performance indicates the feasibility of NBCFM-30% SDC as an IT-SOFC cathode material. This study provides a promising strategy for designing high-performance composite cathodes for SOFCs based on triple perovskite structures.
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Surface restructuring of a perovskite-type air electrode for reversible protonic ceramic electrochemical cells. Nat Commun 2022; 13:2207. [PMID: 35459865 PMCID: PMC9033792 DOI: 10.1038/s41467-022-29866-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 04/05/2022] [Indexed: 11/24/2022] Open
Abstract
Reversible protonic ceramic electrochemical cells (R-PCECs) are ideally suited for efficient energy storage and conversion; however, one of the limiting factors to high performance is the poor stability and insufficient electrocatalytic activity for oxygen reduction and evolution of the air electrode exposed to the high concentration of steam. Here we report our findings in enhancing the electrochemical activity and durability of a perovskite-type air electrode, Ba0.9Co0.7Fe0.2Nb0.1O3-δ (BCFN), via a water-promoted surface restructuring process. Under properly-controlled operating conditions, the BCFN electrode is naturally restructured to an Nb-rich BCFN electrode covered with Nb-deficient BCFN nanoparticles. When used as the air electrode for a fuel-electrode-supported R-PCEC, good performances are demonstrated at 650 °C, achieving a peak power density of 1.70 W cm−2 in the fuel cell mode and a current density of 2.8 A cm−2 at 1.3 V in the electrolysis mode while maintaining reasonable Faradaic efficiencies and promising durability. One limiting factor to the high-performing reversible protonic ceramic electrochemical cells is the poor stability and electrocatalytic activity of air electrodes. Here the authors report a water-promoted surface restructuring process to enhance the performance of Ba0.9Co0.7Fe0.2Nb0.1O3-δ air electrode.
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Li Z, Peng M, Zhao Y, Li J, Sun Y. Minimized thermal expansion mismatch of cobalt-based perovskite air electrodes for solid oxide cells. NANOSCALE 2021; 13:20299-20308. [PMID: 34846404 DOI: 10.1039/d1nr06845h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The mismatch of thermal expansion coefficients (TECs) between cobalt-containing perovskite air electrodes and electrolytes is a great challenge for the development of thermo-mechanically durable solid oxide cells (SOCs). In this work, we propose a facile design principle to directly grow highly dispersed Co reactive sites onto ion-conducting scaffolds and confine the dimension of active centres within nanoscale. As a representative, the Co-socketed BaCe0.7Zr0.2Y0.1O3-δ perovskite (denoted as R-BCZY-Co) was constructed via a consecutive sol-gel and in situ exsolution approach. Combined XRD, H2-TPR, SEM and TEM results confirm the emergence of Co nanoparticles on a BCZY matrix without the segregation of a secondary Co-rich phase. The symmetric half-cell measurement suggests that R-BCZY-Co air electrode with the optimal Co content of 10 mol% exhibits a 7-fold promoted oxygen activation performance with a polarization resistance of ∼0.17 Ω cm2 at 750 °C. The TEC mismatch between fabricated R-BCZY-Co electrodes and BCZY electrolytes is minimized down to only ∼11.4%, which is significantly lower than that of other representative counterparts. Moreover, the detailed XPS result proves that the architecture of exsolved Co on BCZY possesses a higher concentration of surface oxygen vacancy, which further benefits the kinetics of ion diffusion and oxygen absorption.
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Affiliation(s)
- Zhishan Li
- College of Energy, Xiamen University, Xiamen, Fujian, 361102, China.
| | - Meilan Peng
- College of Energy, Xiamen University, Xiamen, Fujian, 361102, China.
| | - Yingru Zhao
- College of Energy, Xiamen University, Xiamen, Fujian, 361102, China.
| | - Jianhui Li
- National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Yifei Sun
- College of Energy, Xiamen University, Xiamen, Fujian, 361102, China.
- Shenzhen Research Institute of Xiamen University, Shenzhen, Guangdong, 518057, China
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
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Liu M, Li H, Bai L, Zheng K, Zhao Z, Chen Z, Ng SW, Ding L, Zeng C. Real-time and visual sensing devices based on pH-control assembled lanthanide-barium nano-cluster. JOURNAL OF HAZARDOUS MATERIALS 2021; 413:125291. [PMID: 33588337 DOI: 10.1016/j.jhazmat.2021.125291] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 01/24/2021] [Accepted: 01/29/2021] [Indexed: 06/12/2023]
Abstract
Real-time and visual monitoring of pollutants in the air is of great importance since they are usually cannot be seen, smelled, or touched. Lanthanide nano-cluster is a kind of luminescent sensor for various species. However, controlling synthesis of lanthanide nano-cluster remains experimentally challenging. In this work, four series of lanthanide-barium (Ln-Ba) nano-clusters of Dy2Ba (1), Tb2Ba2 (2), Ln4Ba3 (Ln = Tb, 3a; Eu, 3b), Tb4Ba4 (4) were assembled through precisely controlling the pH of the reactant solutions. The work features the first example that the number of cluster's nuclei changes regularly with the pH. Moreover, investigation reveals that nano-cluster 3a is a highly selective and sensitive sensor towards acetylacetone (acac) and aniline. Interestingly, easy-to-use sensing devices of test paper, agarose gel, and five kinds of film on CaCO3, polyfoam, coin, mask, and wall that based on 3a were fabricated by facile methods. The seven sensing devices showed remarkable ability to sense aniline and acac vapors with visibility to the naked eyes. This is the first work on multiple real-time and visual sensing devices based on the lanthanide nano-cluster.
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Affiliation(s)
- Min Liu
- College of Chemistry and Chemical Engineering, Research Center for Ultra Fine Powder Materials, Key Laboratory of Functional Small Organic Molecule, Ministry of Education and Jiangxi's Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, PR China
| | - Haoran Li
- College of Chemistry and Chemical Engineering, Research Center for Ultra Fine Powder Materials, Key Laboratory of Functional Small Organic Molecule, Ministry of Education and Jiangxi's Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, PR China
| | - Lan Bai
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Kai Zheng
- College of Chemistry and Chemical Engineering, Research Center for Ultra Fine Powder Materials, Key Laboratory of Functional Small Organic Molecule, Ministry of Education and Jiangxi's Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, PR China
| | - Zhipeng Zhao
- College of Chemistry and Chemical Engineering, Research Center for Ultra Fine Powder Materials, Key Laboratory of Functional Small Organic Molecule, Ministry of Education and Jiangxi's Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, PR China
| | - Zhao Chen
- College of Chemistry and Chemical Engineering, Research Center for Ultra Fine Powder Materials, Key Laboratory of Functional Small Organic Molecule, Ministry of Education and Jiangxi's Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, PR China
| | - Seik Weng Ng
- UCSI University Kuala Lumpur Campus, Jalan Puncak Menara Gading 1, 56000 Bandar Cheras, Kuala Lumpur, Malaysia
| | - Liwen Ding
- College of Chemistry and Chemical Engineering, Research Center for Ultra Fine Powder Materials, Key Laboratory of Functional Small Organic Molecule, Ministry of Education and Jiangxi's Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, PR China
| | - Chenghui Zeng
- College of Chemistry and Chemical Engineering, Research Center for Ultra Fine Powder Materials, Key Laboratory of Functional Small Organic Molecule, Ministry of Education and Jiangxi's Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, PR China.
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8
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Li Z, Li M, Zhu Z. Perovskite Cathode Materials for Low-Temperature Solid Oxide Fuel Cells: Fundamentals to Optimization. ELECTROCHEM ENERGY R 2021. [DOI: 10.1007/s41918-021-00098-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Liu Y, Dou Y, Li S, Xia T, Xie Y, Wang Y, Zhang W, Wang J, Huo L, Zhao H. Synergistic Interaction of Double/Simple Perovskite Heterostructure for Efficient Hydrogen Evolution Reaction at High Current Density. SMALL METHODS 2021; 5:e2000701. [PMID: 34927891 DOI: 10.1002/smtd.202000701] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 09/02/2020] [Indexed: 06/14/2023]
Abstract
Electrocatalytic hydrogen production for industrial level requires highly active and cost-effective catalysts at large current densities. Herein A-site Ba-deficient double perovskite PrBa0.94 Co2 O5+ δ (PB0.94 C) is used as a precursor for fabricating PB0.94 C-based double/simple perovskite heterostructure (PB0.94 C-DSPH). PB0.94 C-DSPH with enhanced electrochemical surface area, more hydrophilic surface, and high conductivity ensures abundant active sites, rapid release of gas, and efficient charge transfer at high current densities. The resultant PB0.94 C-DSPH delivers the overpotential of 364 mV at a current density of 500 mA cm-2 for hydrogen evolution reaction in 1.0 m KOH solution, along with excellent long-term durability. Promisingly, the electrolyzer with PB0.94 C-DSPH cathode and NiFe-layered double hydroxide anode demonstrates high performance for overall water splitting by yielding high current density of 500 mA cm-2 at 1.93 V. Density functional theory calculations indicate that the double/simple perovskite heterostructure promotes the water adsorption, the dissociation of molecular H2 O, and the OH* desorption considerably, which controls the whole hydrogen evolution process. The proposed PB0.94 C-DSPH solves the problem of low hydrogen-evolution efficiency at high current density faced by noble metal-based catalysts in basic environment. This study may provide a route to explore high-demand elements in the earth for addressing the critical catalysts in clean-energy utilizations.
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Affiliation(s)
- Yingying Liu
- Key Laboratory of Functional Materials Chemistry, Ministry of Education, School of Chemistry, Chemical Engineering and Materials, Heilongjiang University, Harbin, 150080, P. R. China
| | - Yingnan Dou
- Key Laboratory of Functional Materials Chemistry, Ministry of Education, School of Chemistry, Chemical Engineering and Materials, Heilongjiang University, Harbin, 150080, P. R. China
| | - Shuang Li
- Key Laboratory of Functional Materials Chemistry, Ministry of Education, School of Chemistry, Chemical Engineering and Materials, Heilongjiang University, Harbin, 150080, P. R. China
| | - Tian Xia
- Key Laboratory of Functional Materials Chemistry, Ministry of Education, School of Chemistry, Chemical Engineering and Materials, Heilongjiang University, Harbin, 150080, P. R. China
| | - Ying Xie
- Key Laboratory of Functional Materials Chemistry, Ministry of Education, School of Chemistry, Chemical Engineering and Materials, Heilongjiang University, Harbin, 150080, P. R. China
| | - Yan Wang
- Key Laboratory of Automobile Materials MOE, and Electron Microscopy Center, Jilin University, Changchun, 130012, P. R. China
| | - Wei Zhang
- Key Laboratory of Automobile Materials MOE, and Electron Microscopy Center, Jilin University, Changchun, 130012, P. R. China
| | - Jingping Wang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China
| | - Lihuo Huo
- Key Laboratory of Functional Materials Chemistry, Ministry of Education, School of Chemistry, Chemical Engineering and Materials, Heilongjiang University, Harbin, 150080, P. R. China
| | - Hui Zhao
- Key Laboratory of Functional Materials Chemistry, Ministry of Education, School of Chemistry, Chemical Engineering and Materials, Heilongjiang University, Harbin, 150080, P. R. China
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