Article
Chemistry, Physical
Leticia P. R. Moraes, Marina Machado, Lays N. Rodrigues, Ziqi Sun, Debora Marani, Fabio C. Fonseca
Summary: A novel method for synthesizing two-dimensional gadolinium-doped cerium oxide nanosheets as interdiffusion barrier layers in solid oxide fuel cells is developed. The shape of the nanosheets is controlled using a low-cost wet-chemical method, allowing for the fabrication of a dense barrier layer. The electrochemical properties of the fuel cells confirm the efficiency of the cerium oxide nanosheets in preventing the formation of resistive phases at the interface.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Agata Sawka, Andrzej Kwatera
Summary: In this work, yttria-doped ceria (YDC) layers were synthesized by Metalorganic Chemical Vapour Deposition using Ce and Y compounds as reactants, and the microstructure and transparency of the layers were investigated. The deposition process resulted in smooth and non-porous YDC layers with varying Y2O3 content, influenced by factors such as gas pressure and molar content of Y reactant. The reduction of gas pressure in the reactor led to the synthesis of uniform layers of different thickness in transverse sample cross-sections.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Materials Science, Ceramics
Monika Singh, Akhilesh Kumar Singh
Summary: The addition of alkali carbonates plays a significant role in influencing superionic conduction in doped ceria-based nanocomposites via composite interfaces. X-ray diffraction confirms the structure of the composite, while TEM analysis shows the formation of an amorphous layer of carbonates on nanocrystalline doped ceria particles.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Huimin Dai, Siyu Su, Yifan Cui, Yueming Lin, Liang Zhang, Xiaohong Zhu
Summary: In this study, nitrogen/sulfur co-doped reduced graphene oxide and polypyrrole composite aerogel materials were prepared and assembled into binder-free flexible electrodes. The RGP-5 sample, prepared with a mass ratio of 1:1 for graphene oxide and polypyrrole, exhibited excellent electrochemical performance with high specific capacitance and capacitance retention. The assembled RGP-5//RGP-5 flexible quasi-solid symmetric supercapacitor showed high energy density and power density, and maintained 80% capacitance after 1000 cycles of charging and discharging. The RGP-5//RGP-5 also showed good flexibility with almost unchanged specific capacitance under different bending angles.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Chemical
Michele Gibelli, Giulio Cordaro, Alessandro Donazzi
Summary: In this study, symmetric electrolyte-supported YSZ cells infiltrated with LSF were prepared, characterized, and tested in the oxygen reduction reaction. The effects of calcination temperature and precursors load on the ORR activity were investigated, with optimal performance achieved at 750 degrees C and with LSF loads between 20% and 40%. Equivalent circuit analysis of the EIS results indicated that the reactivity at the LSF/gas interface is rate-determining.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Physical
Grazia Accardo, Emilio Audasso, Sung Pil Yoon
Summary: Microstructural and electrochemical investigations were conducted on tri-doped cerium oxide with Gd, Li, and Bi. The combination of lithium and bismuth effectively reduced the sintering temperature. The doping-induced complex network of defects improved the ionic transport and increased the total conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Huanhuan Zhang, Zhengguang Zou, Shengyu Li, Yanjiao Zhang, Shuchao Zhang, Jie Liu
Summary: Nanorod-like Co-doped V6O13 was synthesized for the first time by one-step solvothermal method, showing the best electrochemical performance at x = 0.03 with high discharge specific capacity and capacity retention after cycles. The increase in specific surface area and structural stability promoted the kinetics of the chemical reaction, improving the electrochemical properties of the material.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Amar Bendieb Aberkane, Maria Pilar Yeste, Faycal Djazi, Miguel Angel Cauqui
Summary: In this study, a series of NiO-CeO2 mixed-oxide catalysts were prepared using a modified co-precipitation method. The influence of the preparation method and pH value on the properties of the catalysts were investigated. The catalyst prepared at a higher pH value exhibited better performance in the CO methanation reaction.
Article
Chemistry, Multidisciplinary
Xue Bian, Hanying Jia, Ming Cai, Peng Cen, Yuting Bai, Wenyuan Wu
Summary: The study of CeO2-Fe2O3 catalysts showed that the addition of CeO2 reduced the reaction temperature and improved NO conversion. With increasing Ce/Fe ratio, the main phase of the catalyst transformed gradually from iron oxide to ceria, and the specific surface area increased, enhancing the redox capacity and adsorption properties. The in situ infrared surface catalyst reaction involved a combination of the Langmuir-Hinshelwood mechanism and the Eley-Rideal mechanism, which improved denitration performance.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Engineering, Environmental
Shuaishuai Man, Hebin Bao, Ke Xu, Haifeng Yang, Qing Sun, Lei Xu, Wenjing Yang, Zhihong Mo, Xueming Li
Summary: In this study, Nd-Sb co-doped SnO2 nanoflower electrode was prepared, showing excellent electrocatalytic activity and high stability for the degradation of norfloxacin. Factors affecting electrode performance were investigated, and degradation mechanism and toxicity evaluation were explored. The electrode provides a new strategy for norfloxacin degradation through electrochemical oxidation technology.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Rohi Zahra, Sammar Tayyab, M. Anis-ur-Rehman
Summary: Solid oxide fuel cells (SOFCs) have gained much attention for their high efficiency and environmentally friendly nature. The main component affecting fuel cell performance is the electrolyte material. This study focused on the synthesis and characterization of Ce0.75-xBixGd0.25O2 materials for SOFCs operating at intermediate temperatures. The doped samples exhibited improved structural and electrical properties, making them potential candidates for SOFC electrolytes.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Ceramics
Qiuqiu Lyu, Tenglong Zhu, Hongxia Qu, Zaihong Sun, Kaihua Sun, Qin Zhong, Minfang Han
Summary: The hydrothermal reaction method is developed and utilized to enhance the densification of gadolinia doped ceria, resulting in significant reduction of ohmic resistance and cathode polarization resistance in electrolyte supported symmetrical cells. The modified barrier layer shows improved performance and reduced Sr migration, indicating promising large-scale application prospects and cost-competitiveness.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Kun Zhou, Miaomiao Hu, Tingyi Zhao, Qingzhao Shi, Jiaxin Feng, Xue Ma, Mingqin Zhao, Zhihui Shao, Bing Cui
Summary: A series of Co3O4 and CoxCe1Oy catalysts were successfully prepared by a colloidal crystal template method. They exhibited a three-dimensional ordered microporous structure and Ce doping into the Co3O4 lattice. The Ce doping enhanced the oxidation capacity and catalytic performance of the catalysts. Among them, 3D-Co16Ce1Oy showed the best catalytic activity and thermal stability.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
S. Kurajica, I. K. Ivkovic, G. Drazic, V Shvalya, M. Duplancic, G. Matijasic, U. Cvelbar, K. Muzina
Summary: Manganese-doped ceria nanoparticles were synthesized and thermally treated, resulting in improved catalytic activity for toluene oxidation. The presence of manganese in the ceria lattice structure altered the properties of the nanoparticles, leading to an increase in oxygen adsorption that promoted surface reactions.
Article
Electrochemistry
Yanbo Li, Ye Wan, Haixiao Zhang, Xiaodan Wang
Summary: The Fe-doped and Fe/N-co-doped graphene composite materials were synthesized from a graphene oxide dispersion using a hydrothermal method. The Fe2+ was oxidized to alpha-Fe2O3, while the graphene oxide was reduced to rGO during the reaction. In the Fe/N co-doped material, nitrogen atoms were incorporated into the graphene structures in the form of C-N and C=N bonds, leading to improved conductivity and kinetics for ion and electron transport.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)