Article
Materials Science, Ceramics
Yameng Zhu, Jinpeng Zhu, Hailong Wang, Kaijun Yang, Mingliang Li, Jilin He
Summary: The researchers synthesized a novel thermal protection material, LSTN0.125, which exhibits ultrahigh optical reflectivity, high thermal expansion coefficient, and ultralow thermal conductivity, making it an ideal choice for near-infrared thermal protection applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Zicheng Shao, Qiuwan Shen, Haoran Ding, Yaowei Jiang, Shian Li, Guogang Yang
Summary: In this study, a series of SrCo1-xCuxO3-delta catalysts were synthesized and characterized. The results revealed that the doping of cobalt and copper, as well as the reaction conditions, have an impact on the catalyst performance. Among the catalysts tested, SrC0.08Cu0.2O3-delta exhibited the highest hydrogen production rate in the MSR process. Additionally, the porous structure, small particle size, and rough surface of the catalyst also contributed to the improved catalytic performance.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Xihan Tan, Ning Han, Huibing Chen, Lin Su, Chi Zhang, Ying Li
Summary: The Mn-doped BaCeO3 series composite oxide catalysts were successfully prepared by a sol-gel method, exhibiting good catalytic performance and high temperature stability. The catalytic performance of the catalyst is directly proportional to its conductivity, with Mn doping significantly improving the catalytic activity for methane combustion.
CERAMICS INTERNATIONAL
(2021)
Article
Electrochemistry
Xinmin Fu, Xiangwei Meng, Shiquan Lu, WeiJiang Gong
Summary: In this study, Sm0.5Sr0.5Co1-xBixO3-δ (SSCB, x = 0.00-0.10) nanofiber cathode materials were prepared by electrospinning for solid oxide fuel cells (SOFCs). The SSCB nanofibers exhibited orthorhombic perovskite structures according to XRD analysis. XPS analysis confirmed the presence of Sm3+, Sr2+, Co3+/Co4+, and Bi3+ species in the SSCB samples. The nanofiber cathodes of SSCB heated at 900 degrees C showed a homogeneous porous microstructure and good contact with the Sm0.2Ce0.8O1.95 (SDC) electrolyte. Among the samples, the SSCB nanofiber cathode with x = 0.07 showed the lowest polarization resistance (Rp) at various temperatures, and the anode-supported single cell with this cathode achieved a peak power density (PPDs) of 1.16 W cm-2 at 750 degrees C. These findings suggest the potential of nanofiber SSCB oxides as cathode materials for SOFCs.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Birkneh Sirak Teketel, Bayu Admasu Beshiwork, Dong Tian, Shiyue Zhu, Halefom G. Desta, Khan Kashif, Yonghong Chen, Bin Lin
Summary: A new cathode material, PBFZ, was studied to improve the performance of low-temperature solid-oxide fuel cells. By partially substituting Fe with Zn, PBFZ exhibited enhanced electrical conductivity and thermal compatibility, and showed improved conductivity in intermediate temperatures and good chemical compatibility with electrolytes, leading to enhanced performance.
Article
Chemistry, Physical
Jianxiong Gao, Yajing Zhang, Xingkun Wang, Lujian Jia, Heqing Jiang, Minghua Huang, Arafat Toghan
Summary: This study demonstrates the enhanced electrocatalytic performance of perovskite oxide SFMON for hydrogen evolution reaction (HER) in alkaline media through nitrogen doping. The increased oxygen vacancy and high-valence Fe content by nitrogen doping are favorable for improving the HER efficiency.
MATERIALS TODAY ENERGY
(2021)
Article
Biochemistry & Molecular Biology
Chiara Aliotta, Maria Costa, Leonarda Francesca Liotta, Valeria La Parola, Giuliana Magnacca, Francesca Deganello
Summary: Two La0.25Ba0.25Sr0.5Co0.8Fe0.2O3-delta-based perovskite compounds were synthesized by solution combustion method and compared with Ba0.5Sr0.5Co0.8Fe0.2O3-delta and La0.5Sr0.5Co0.8Fe0.2O3-delta perovskites for their potential as cathodes in Solid Oxide Fuel Cells. Calcination at 900 degrees C resulted in a bi-perovskite heterostructure, while higher temperatures led to a single-phase perovskite. Co-doping the A-site of perovskites with barium and lanthanum improved the oxygen vacancies' availability and redox properties, reducing the total resistance.
Article
Chemistry, Physical
Chao Sun, Liuzhen Bian, Ji Qi, Wang Yu, Shuting Li, Yunting Hou, Liju Wang, Jun Peng, Shengli An
Summary: The study presents a promising cathode material, Sr1.9La0.1Fe1.5Mo0.5O6-delta, for CO2 electrolysis, which exhibits excellent electrochemical performance and stability.
JOURNAL OF POWER SOURCES
(2022)
Article
Materials Science, Ceramics
Hamideh Shakeripour, Seyed Sajjad Hosseini, Seyedeh Sara Ghotb, Behnaz Hadi-Sichani, Sepideh Pourasad
Summary: The study introduced Fe, Co and Ni magnetic impurities into superconducting cuprate YBa2Cu3O7-delta, resulting in an increase in Tc, while non-magnetic dopings showed a decrease in Tc.
CERAMICS INTERNATIONAL
(2021)
Article
Energy & Fuels
Mohammad Ahangari, Jafar Mostafaei, Ali Sayyah, Elham Mahmoudi, Elnaz Asghari, Ali Coruh, Nagihan Delibas, Aligholi Niaei
Summary: Perovskite materials SrFexCo1-xO3-delta (SCF-x, x = 0.2, 0.5, 0.8) were synthesized by sol-gel combustion and studied as electrode materials for supercapacitors. The synthesized samples were characterized using X-ray Diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), Raman spectroscopy, Scanning Electron Microscope (SEM), and Energy Dispersive X-ray Spectroscopy (EDS). Substitution in the perovskite structure affected the oxygen vacancy concentration and changed the electrochemical properties. SCF-0.8 exhibited the highest specific capacitance (433 F center dot g(-1)) at 2 A center dot g(-1) current density due to its morphology, crystal structure, and higher oxygen vacancy concentration. The electrochemical stability of SCF-0.8 was tested and it retained around 60% of its initial specific capacitance after 2500 charge-discharge cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Yanbo Liu, Qiangchao Sun, Tong Duan, Chaoyun Liu, Hongwei Cheng
Summary: The development of a perovskite-type oxygen transport membrane with high stability is important for thermochemical water splitting for hydrogen production. This study investigated the stability enhancement of a doped high valence ion (Nb5+) in the Pr0.6Sr0.4Fe0.9Nb0.1O3-delta (PSFN) oxygen transport membrane, considering the crystal structure, thermal expansion property, and roles of Fe3+/4+ ions. The introduction of Nb inhibits phase transition, thermal expansion, and lattice oxygen release, improving structural stability even in a reducing atmosphere. Additionally, a decrease in the average valence of Fe ions enhances the chemical stability of PSFN, with a Fe3+ to Fe4+ ratio close to 2:1 contributing to long-term stability in hydrogen production from water splitting.
Article
Physics, Condensed Matter
E. K. Abdel-Khalek, E. A. Mohamed, D. A. Rayan, Saad G. Mohamed
Summary: La1-xAgxMnO3 +/-delta perovskite samples were prepared by co-precipitation method for supercapacitor electrodes. Characterizations were performed using various techniques, showing that Ag doped LaMnO3 +/-delta has potential as a promising material for supercapacitor electrodes.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Chemistry, Physical
Yu Shuai, Shucheng Liu, Yanyan Wang, Wenxing Zhou, Xiaosi Qi, Yi Liu
Summary: In this study, Fe doping in the B-site of GdBaCo2O5+delta (GBCO) was adopted to prepare efficient electrocatalysts for alkaline conditions. Fe doping significantly improved the oxygen evolution reaction (OER) activity of GBCO, with GdBaCo1.6Fe0.4O5+delta showing the lowest overpotential of 298 mV at 10 mA cm-2. Furthermore, the surface of GdBaCo1.6Fe0.4O5+delta was modified with MOF ZIF-67, greatly enhancing its oxygen reduction reaction (ORR) activity compared to the pristine perovskite and Pt/C.
CATALYSIS COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Shenghao Li, Xiaohuan Wang, Zhiming Shi, Jun Wang, Guojun Ji, Xinba Yaer
Summary: Ferrous titanate (FeTiO3) has been studied as a potential lithium anode material. Nanopowder and nanosheets of FeTiO3 were prepared using the sol-gel and hydrothermal methods. The researchers found that FeTiO3 nanosheets had better lithium storage performance due to their higher specific surface area, and niobium doping improved the electrochemical properties of FeTiO3.
Article
Chemistry, Physical
Shusheng Wu, Jin Li, Jiaping Hu, Yuhu Huang, Han-Shu Xu, Kaibin Tang
Summary: We conducted a study on the catalytic performance of several typical cubic perovskite oxides, Pr0.5Sr0.5Co0.8Fe0.2O3-delta, Ba0.5Sr0.5Co0.8Fe0.2O3-delta, and SrCo0.8Fe0.2O3-delta, synthesized using the sol-gel method. Pr0.5Sr0.5Co0.8Fe0.2O3-delta calcined at 700 degrees C exhibited the best catalytic performance, with the lowest overpotential of 320mV in 1 M KOH at 10 mA cm(-2) and the highest mass activity of 23.84 A g(-1) at 1.55 V vs. RHE. Additionally, these catalysts displayed paramagnetic and semiconducting behaviors at room temperature. In conclusion, our research expands the application of perovskite oxides in electrocatalytic oxygen evolution.
ACS APPLIED ENERGY MATERIALS
(2023)
