Article
Electrochemistry
Qingjie Wang, Sandrine Ricote, Ming Chen
Summary: Protonic ceramic cells (PCCs), including protonic ceramic fuel cells (PCFCs) and electrolysis cells (PCECs), have advantages such as low activation energy for proton diffusion, fuel flexibility, absence of fuel dilution, and potentially lower costs. However, the design of efficient oxygen electrodes is a major challenge for PCCs. Research groups have made efforts to improve the oxygen electrode, resulting in enhanced power output and current density in PCCs. This review article summarizes the progress in oxygen electrodes for PCCs and provides potential pathways for further development of high-performance electrodes.
ELECTROCHIMICA ACTA
(2023)
Article
Electrochemistry
Yun Xie, Nai Shi, Xueyu Hu, Kang Zhu, Ranran Peng, Changrong Xia, Ming Chen
Summary: This study demonstrates that the novel electrochemical catalyst improves the stability and electrochemical performance of R-PCCs. The enhanced stability and performance of the air electrode catalyst may be attributed to the higher electronegativity of La, which reduces basicity and improves chemical stability in acidic atmospheres; the smaller ionic radius of La, which alleviates lattice distortion; and the stronger interaction between La and lattice oxygen, inhibiting structural degradation caused by Sr segregation.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Yushuai Yao, Yi Yu, Cheng Du, Liu Wan, Yan Zhang, Jian Chen, Ting Xiao, Mingjiang Xie
Summary: In this study, porous carbon materials with oxygen doping were synthesized using different templates with varying basicity. The results showed that the strength of template basicity influenced the surface functionalities and electrochemical performances of the derived carbon materials. Systematic investigations revealed a relationship between the basic strength of the template and the content of electrochemically active oxygen species and microporosity of the derived materials. O-PCN-20, templated by a 20% K/Mg(OH)2 solution, exhibited excellent supercapacitor performances with high specific capacitance, rate capability, energy density, and cycling stability, making it a promising electrode material for energy storage devices.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
Anna Kasyanova, Artem Tarutin, Julia Lyagaeva, Xian-Zhu Fu, Dmitry Medvedev
Summary: The Y0.9Ca0.1Fe1-xCoxO3-delta phases with Co-doping show improved electrical conductivity and electrochemical polarisation resistance while maintaining good thermal properties. The simultaneous modification of both basic cationic sublattices of YFeO3 by calcium and iron tailors the functionality of the obtained compounds. The performance of a single SOFC with Y0.9Ca0.1Fe0.5Co0.5O3-delta electrode confirms the prospects of these modernized MIECs with acceptable electrochemical activity.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Ning Wang, Baoyin Yuan, Chunmei Tang, Lei Du, Ruijie Zhu, Yoshitaka Aoki, Weibo Wang, Lixin Xing, Siyu Ye
Summary: This study accelerates the discovery of efficient mixed protonic-electronic conducting oxides by introducing the machine-learning (ML) method and establishing guidelines for rapid and accurate design and development. The experimental results confirmed the predicted data, showing satisfactory electrochemical performances of the PCC with the selected oxide. This research not only developed a promising air electrode for PCC but also opened a new avenue for ML-based development of mixed protonic-electronic conducting oxides.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Yang Liu, Shanshan Jiang, Hao Qiu, Wei Wang, Elaine Miller, Chao Su
Summary: In this study, the strategy of halogen doping in a Ba0.6Sr0.4Co0.7Fe0.2Nb0.1O3-d (BSCFN) cathode is discussed for improving its activity. Ba0.6Sr0.4Co0.7Fe0.2Nb0.1O3-x-dFx (x = 0, 0.05, 0.1) cathode materials were synthesized and fluorine ion doping was found to enhance the cathode's catalytic performance by increasing active oxygen and surface adsorbed oxygen. The effects of different fluorine ion incorporation amounts on oxygen positions were also analyzed.
Article
Chemistry, Analytical
Bruna F. Gomes, Martin Prokop, Tomas Bystron, Rameshwori Loukrakpam, Carlos M. S. Lobo, Maximilian Kutter, Timon E. Guenther, Michael Fink, Karel Bouzek, Christina Roth
Summary: This study investigates the effect of H3PO4 purity on the activity of Pt/C thin film catalysts towards the oxygen reduction reaction (ORR). The results show that non-purified H3PO4 has a more negative effect on catalyst activity, attributed to the presence of H3PO3 in the non-purified H3PO4 solution. The study also demonstrates the importance of H3PO4 purity level for reliable ORR testing.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Maria A. Gordeeva, Artem P. Tarutin, George N. Starostin, Gennady K. Vdovin, Dmitry A. Medvedev
Summary: In order to create efficient solid oxide fuel cells, suitable functional materials are needed to satisfy the requirements for both fuel and oxygen electrodes. By investigating the properties of La1-xBaxFeO3-delta materials, it was found that La0.6Ba0.4FeO3-delta exhibits the highest electrical conductivity and acceptable thermal expansion behavior, making it suitable as an oxygen electrode. However, the transport properties under reducing atmospheres need improvement for the successful use of La1-xBaxFeO3-delta as symmetrical electrodes.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Jong Seon Park, Hyung Jong Choi, Gwon Deok Han, Junmo Koo, Eun Heui Kang, Dong Hwan Kim, Kiho Bae, Joon Hyung Shim
Summary: This study demonstrates the enhanced performance of protonic ceramic fuel cells (PCFCs) by adding palladium (Pd) interlayers, which successfully integrated between the BZCYYb and PBSCF layers with great long-term stability. The presence of Pd significantly improved current collection and reduced polarization impedance at the cathode-electrolyte interface, especially at low temperatures, promising for high-performance and robust PCFCs.
JOURNAL OF POWER SOURCES
(2021)
Article
Multidisciplinary Sciences
Wenjuan Bian, Wei Wu, Baoming Wang, Wei Tang, Meng Zhou, Congrui Jin, Hanping Ding, Weiwei Fan, Yanhao Dong, Ju Li, Dong Ding
Summary: Researchers improved the electrochemical performance and stability of protonic ceramic fuel cells by acid treatment, enabling exceptional performance at lower temperatures.
Article
Chemistry, Physical
Junmeng Jing, Ze Lei, Ziwei Zheng, Haoran Wang, Panpan Zhang, Zhaowen Wang, Hui Xu, Zhibin Yang
Summary: In this research, the crystal structure, oxygen non-stoichiometry, and conductivity of a triple-conducting perovskite Ba0.95La0.05Fe0.8Zn0.2O3_5 (BLFZ) were investigated. It was found that BLFZ exhibits high oxygen vacancy concentration, making it a potential candidate for highly active oxygen electrodes in reversible protonic ceramic cells (R-PCCs). The performance of BLFZ-BZCYYb oxygen electrode was evaluated, and it demonstrated promising results for R-PCCs applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Electrochemistry
Qingjie Wang, Sandrine Ricote, Yu Wang, Peter Vang Hendriksen, Jianqiang Wang, Ming Chen
Summary: In this study, a composite oxygen electrode was prepared by infiltrating a protonic-electronic conducting material into a proton-conducting backbone. The electrode performance was characterized using EIS and three electrode reaction processes were observed. The developed electrode showed low polarization resistance under varying operating conditions.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Sung Hyun Hwang, Soon Ki Kim, Jun-Tae Nam, Jong-Sung Park
Summary: The study optimized the performance of a cathode for protonic ceramic fuel cells by employing a triple-component composite cathode design, which significantly improved the performance of CH4 fuel and suggests a possible contribution of the oxygen reduction reaction at the cathode to the reformation of CH4 at the anode.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Allan J. M. Araujo, Vanessa C. D. Graca, Rafael A. Raimundo, Antonio C. L. Filho, Daniel A. Macedo, Francisco J. A. Loureiro
Summary: Protonic ceramic cells (PCCs) have the potential to be energy conversion devices operating at lower temperatures. This study introduces Ba2Co9O14 (BCO) as an electrocatalyst for oxygen reactions in PCCs, demonstrating high electrochemical performance and chemical compatibility. The results highlight the importance of surface diffusion in explaining the high-performing behavior of BCO electrodes.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Engineering, Environmental
Zuoqing Liu, Dongfang Cheng, Yinlong Zhu, Mingzhuang Liang, Meiting Yang, Guangming Yang, Ran Ran, Wei Wang, Wei Zhou, Zongping Shao
Summary: Driven by the demand for sustainable energy, reversible proton ceramic electrochemical cells (R-PCECs) have attracted attention. However, the low activity and poor durability of the oxygen electrode limit their large-scale application. In this study, a novel oxygen electrode material with high activity and stability is developed through partial doping of non-metallic phosphorus. The results show promising potential for non-metal-doped oxygen electrode materials in practical R-PCECs.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Ceramics
N. Tarasova, A. Galisheva, I. Animitsa, D. Korona, E. Abakumova, D. Medvedev
Summary: This study confirmed that the acceptor (calcium) and donor (indium) doping can significantly improve the properties of layered perovskite BaLa2In2O7 and increase the oxygen-ionic conductivity. It provides a new approach for the design of novel oxygen-ionic conductors.
CERAMICS INTERNATIONAL
(2022)
Review
Materials Science, Ceramics
Inna A. Zvonareva, Dmitry A. Medvedev
Summary: Solid oxide fuel cells are efficient energy conversion devices, but the traditional yttria-stabilized zirconia materials used for electrolytes require high temperatures. This study analyzes the potential of barium stannate as a proton-conducting electrolyte material and confirms its suitability.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Electrochemistry
Anna V. Kasyanova, Julia G. Lyagaeva, Gennady K. Vdovin, Anna A. Murashkina, Dmitry A. Medvedev
Summary: The synthesis and comprehensive study of acceptor-doped lanthanum ytterbates were successfully conducted. These materials showed high chemical stability, good conductivity, and promising proton-conducting properties, making them suitable for various electrochemical devices, such as solid oxide fuel cells.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Artem P. Tarutin, Nikolai A. Danilov, Andrey A. Kalinin, Anna A. Murashkina, Dmitry A. Medvedev
Summary: The thermomechanical and chemical properties of Pr2NiO4+a-based electrode materials were optimized via Ba-doping, reducing their chemical interaction with Ba(Ce,Zr)O3-based electrolytes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Inna A. Zvonareva, George N. Starostin, Mariam T. Akopian, Gennady K. Vdovin, Xian-Zhu Fu, Dmitry A. Medvedev
Summary: The search for new oxide materials with pronounced proton transport is important for efficient energy conversion processes. Y-doped barium stannates exhibit varying transport properties depending on the doping degree, with weakly doped stannates being electron conductors and heavily doped stannates showing higher ionic conductivity and wider electrolytic domain boundary, making them potential electrolytes for protonic ceramic fuel and electrolysis cells.
JOURNAL OF POWER SOURCES
(2023)
Review
Green & Sustainable Science & Technology
Artem P. Tarutin, Elena A. Filonova, Sandrine Ricote, Dmitry A. Medvedev, Zongping Shao
Summary: Solid oxide fuel cells (SOFCs) and electrolysis cells (SOECs) have the potential for hydrogen and low-carbon energy, aligning with the transition to alternative energy policies. These devices utilize various energy conversion processes, including conventional hydrogen utilization and water electrolysis, as well as novel approaches like CO2 electrolysis and non-oxidative hydrocarbon conversion. Different combinations of electrolytes and electrodes support these processes, enabling electrochemical oxidation and reduction. In this review, structural and chemical strategies to enhance the electrochemical performance of oxygen electrodes at reduced temperatures are discussed. The use of simple perovskite structures, layered derivatives, and modifications of complex oxides are explored as efficient ways to design modernized compositions of oxygen electrodes.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ksenia Belova, Anastasia Egorova, Svetlana Pachina, Irina Animitsa, Dmitry Medvedev
Summary: Oxygen-ionic and proton-conducting oxides, including La2ZnNdO5.5 and its Ca-doped derivatives, were synthesized. These materials were characterized for their phase composition, lattice parameters, and hydration capability. The conductivities of the samples were measured in dry and wet air, showing a significant increase in conductivity due to oxygen vacancies during acceptor doping. The Ca-doped phases also exhibited proton-conducting properties.
Article
Materials Science, Ceramics
Inna A. Zvonareva, George N. Starostin, Mariam T. Akopian, Anna A. Murashkina, Xian-Zhu Fu, Dmitry A. Medvedev
Summary: BaSnO3 is a new family of proton-conducting materials with potential high-temperature applications. The synthesis and characterization of BaSn1-xYxO3-δ (0 < x < 0.4) phases were conducted to understand the variations of chemical and thermal strains depending on composition. The results show that the importance of chemical expansion/contraction effects increases with increasing Y-content. These findings provide valuable data for the application of these materials in protonic ceramic devices.
CERAMICS INTERNATIONAL
(2023)
Review
Chemistry, Physical
Nikolai A. Danilov, Inna A. Starostina, George N. Starostin, Anna V. Kasyanova, Dmitry A. Medvedev, Zongping Shao
Summary: Proton-conducting oxide materials have protonic defects in their crystal structure due to their interaction with hydrogen-containing atmospheres, resulting in superior ionic conductivity. Barium cerate, barium zirconate, and barium cerate-zirconate are widely studied as proton-conducting electrolyte materials. Y and Yb co-doped Ba(Ce,Zr)O-3 is considered one of the most promising systems.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Artem P. Tarutin, Stanislav A. Baratov, Liana R. Tarutina, Gennady K. Vdovin, Dmitry A. Medvedev
Summary: Materials based on barium-containing Pr2NiO4+a show promise as air electrodes for protonic ceramic electrochemical cells due to their attractive properties. This study thoroughly analyzes the transport properties of Pr2NiO4+a modified by Ba-doping. The results indicate that the addition of barium not only improves the transport properties, but also enhances the interface quality in the electrolyte/electrode couple.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Ceramics
Maria A. Gordeeva, Artem P. Tarutin, George N. Starostin, Gennady K. Vdovin, Dmitry A. Medvedev
Summary: In order to create efficient solid oxide fuel cells, suitable functional materials are needed to satisfy the requirements for both fuel and oxygen electrodes. By investigating the properties of La1-xBaxFeO3-delta materials, it was found that La0.6Ba0.4FeO3-delta exhibits the highest electrical conductivity and acceptable thermal expansion behavior, making it suitable as an oxygen electrode. However, the transport properties under reducing atmospheres need improvement for the successful use of La1-xBaxFeO3-delta as symmetrical electrodes.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Vaibhav Bedi, Dipendu Mandal, Zahid Hussain, Shi-Ming Chen, Yile Wu, Zheng-Wang Qu, Stefan Grimme, Douglas W. Stephan
Summary: The reaction of (tBuO(2)CN)(2) with 9-BBN leads to the formation of a bicyclic heterocyclic compound, while its reactions with BF3 or [Et3Si][B(C6F5)(4)] result in the isolation of different compounds. Computational studies reveal that the steric and electronic properties of the Lewis acid are important in the formation of one of the compounds.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Chisa Itoh, Haruka Yoshino, Taku Kitayama, Wataru Kosaka, Hitoshi Miyasaka
Summary: A new synthetic route for constructing functional paddlewheel diruthenium(II,II) complexes was developed, utilizing Schiff base condensation reactions. The attached Schiff base groups significantly affected the electronic states of the resulting complexes, as revealed by cyclic voltammetry and DFT calculations.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Danrui Ni, Haozhe Wang, Xianghan Xu, Weiwei Xie, Robert J. Cava
Summary: A layered rhombohedral polymorph of indium(iii) triiodide is synthesized at high pressure and temperature. It has an orange color, which is different from ambient pressure InI3, which has a monoclinic molecular structure and a light-yellow color.
DALTON TRANSACTIONS
(2024)
Review
Chemistry, Inorganic & Nuclear
Juan Carlos Perez-Sanchez, Raquel P. Herrera, M. Concepcion Gimeno
Summary: Gold(II) complexes have been less utilized in catalysis compared to their gold(I) and gold(III) counterparts. However, gold(II) complexes offer potential in homo-coupling and cross-coupling reactions, as they are more easily accessible through simplified oxidation and reduction processes. Gold(II) exhibits characteristics of both soft acid gold(I) and hard acid gold(III). This review explores the unique reactivity and potential applications of gold(II) species, highlighting their significance in catalytic transformations.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Nighat Yousuf, Yanping Ma, Qaiser Mahmood, Wenjuan Zhang, Yizhou Wang, Hassan Saeed, Wen-Hua Sun
Summary: In this study, a series of structurally rigid cyclooctyl-fused iminopyridine iron complexes were synthesized and used with methylaluminoxane for isoprene polymerization. The extent of steric hindrance of the ligand framework was found to significantly affect catalytic performance, with less hindrance leading to better activity and stability.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Chenghao Song, Huiwei Du, Menglei Xu, Jie Yang, Xinyu Zhang, Jungan Wang, Yuanfang Zhang, Chengjun Gu, Rui Li, Tao Hong, Jingji Zhang, Jiangying Wang, Yongchun Ye
Summary: This study improves the performance of perovskite solar cells by using a dual-hole transport layer strategy. This strategy enhances the charge transfer efficiency of the transport layer, reduces charge recombination, and improves the quality of the perovskite film layer. Ultimately, the stability of the device is enhanced.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Mahender Singh, Aakash Yadav, Ranjit Singh, Chullikkattil P. Pradeep
Summary: A new aryl selenonium polyoxometalate hybrid was developed and compared with an aryl sulfonium polyoxometalate hybrid in terms of their photocatalytic properties. It was found that the aryl selenonium hybrid exhibited better catalytic performance, which could be attributed to the larger atomic radii of selenium stabilizing the photogenerated electron-hole pair more efficiently. Additionally, the generation of elemental selenium through cleavage of C-Se bonds during catalysis was observed.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Yuhan Xie, Boyu Dong, Xuemin Wang, Siyuan Wang, Jinxi Chen, Yongbing Lou
Summary: This study successfully fabricated visible-light-responsive three-dimensional core-shell CoSe2/ZnIn2S4 heterostructures and achieved attractive activity in photocatalytic hydrogen evolution. The presence of CoSe2 improved light absorption and accelerated charge transfer kinetics. The strong interaction between CoSe2 and ZnIn2S4 reduced charge recombination, further enhancing photocatalytic activity for hydrogen evolution.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Andre L. de O. Batista, Joao Marcos T. Palheta, Mauricio J. Piotrowski, Celso R. C. Rego, Diego Guedes-Sobrinho, Alexandre C. Dias
Summary: This study presents a simulation protocol that provides a solid foundation for exploring two-dimensional materials. Using the TiBr2 2H monolayer as an example, the study reveals its promising properties for optoelectronic and valleytronic applications, including its stability, spin-orbit coupling effects, and optical helicity selection rule.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Jiang Jiang, Zi-Wei Li, Zhi-Zhuan Zhang, Bin Tan, Zhao-Feng Wu, Xiao-Ying Huang
Summary: In this work, two metal organic frameworks (MOFs) containing {Cu2I2} clusters, Eu-CuI-INA and Sr-K-CuI-INA, were synthesized and characterized. Both materials have a three-dimensional structure with {Cu2I2} clusters coordinated by INA(-) ligands and Eu3+ or Sr2+ ions. The Sr-K-CuI-INA material exhibited sensitive fluorescence sensing behaviors towards cysteine and nitro-bearing molecules, showing potential applications in bio and explosive molecule sensing. This work provides a good reference for designing fluorescent MOF probes containing CuI molecules.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Zhiya Lin, Jiasheng Wu, Qianwen Ye, Yulong Chen, Hai Jia, Xiaohui Huang, Shaoming Ying
Summary: Na-ion batteries (NIBs) have attracted great interest as a potential technology for grid-scale energy storage due to the wide distribution, low cost, and environmental friendliness of sodium resources. However, their implementation is hindered by low rate capability and cycling stability caused by the large ionic size of Na+. In this study, a three-dimensional nanoarchitectured coral-like CoSe2@N-doped carbon (CL-CoSe2@NC) was synthesized, and it exhibited improved sodium storage properties with better electrode kinetics and a stable SEI film.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Ya-Qiong Zhang, Yu Zhang, Guoping Zeng, Rong-Zhen Liao, Man Li
Summary: The mechanism and selectivity of CO2 reduction under visible light were investigated using density functional calculations. The results showed that a tetradentate PNNP-type Iridium(III) complex exhibited high activity and selectivity in the reaction.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Sanyukta Ghosh, Shubhanth Jain, Soumya Ranjan Mishra, Gerda Rogl, Peter Rogl, Ernst Bauer, B. S. Murty, A. Govindaraj, Ramesh Chandra Mallik
Summary: In this study, reduced graphene oxide (rGO) was uniformly dispersed in the In0.5Co4Sb12 bulk material by ultrasonication, which effectively reduced the lattice thermal conductivity and improved the thermoelectric efficiency.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Mika Takeuchi, Yutaka Amao
Summary: This study developed an effective visible-light driven system for fumaric acid production using renewable resources such as biomass derivatives, providing an alternative to the current petroleum-based synthesis methods.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Juan Jian, Meiting Wang, Zhuo Wang, Jingwen Meng, Yuqin Yang, Limin Chang
Summary: Developing low-cost and self-supported bifunctional catalysts is crucial for highly efficient water splitting devices. In this study, nano-NiFe2O4 was directly grown onto iron foil surface and Sn4+ was introduced into the NiFe2O4. The resulting Sn-NiFe2O4/IF showed low overpotentials and high current densities during oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), making it a promising catalyst for large-scale hydrogen production.
DALTON TRANSACTIONS
(2024)
