Article
Materials Science, Ceramics
Yulong Bai, Xin Wu, Shifeng Zhao
Summary: This study demonstrates the modulation of inverse and conventional magnetocaloric effects in double perovskite Bi2NiMnO6-delta polycrystalline films by controlling artificial oxygen vacancies. The role of oxygen vacancy concentration in magnetocaloric effect is clarified through the charge transfer mechanism. The findings suggest a potential route for designing magnetocaloric materials by manipulating controlled oxygen vacancy defects.
CERAMICS INTERNATIONAL
(2021)
Article
Multidisciplinary Sciences
Zhifang Shi, Zheng Fang, Jingshu Wu, Yi Chen, Qixi Mi
Summary: The structure and properties of organic-inorganic hybrid perovskites are affected by the order-disorder transition, driven by the organic cation and the inorganic framework. The cage-in-framework perovskite AthMn(N-3)(3) features a unique design with an organic cation Ath(+) and undergoes an order-disorder transition characterized by NMR, crystallography, and calorimetry. This transition leads to a significant increase in the dielectric constant, providing insights into the behavior of hybrid materials.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Jan Albert Zienkiewicz, Edyta Kucharska, Maciej Ptak
Summary: [DMHy]Mn(HCOO)(3) is an organic-inorganic hybrid compound with a perovskite-like structure, undergoing an unusual phase transition at 240K driven by the ordering of DMHy(+) cations and steric deformation caused by tight confinement of organic cations. The study combined experimental and computational methods to elucidate the structural changes, showing that the phase transition is highly dynamic and involves rearrangement of hydrogen bonds and cation ordering.
Article
Engineering, Chemical
Christelle Yacou, Adrian Leo, Julius Motuzas, Simon Smart, Shude Zhang, Shaomin Liu, Joao C. Diniz da Costa
Summary: This study presents the preparation, characterization, and oxygen separation performance of catalytic surface modified BSCC perovskite hollow fibers. The BSCC hollow fibers were prepared by phase inversion and sintering, and then surface modified with Ag nanoparticles as a catalyst. The Ag-BSCC hollow fibers showed significantly higher oxygen fluxes compared to the blank BSCC hollow fibers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Mingchun Li, Cunliang Shen, Jie Ji, Laishi Li, Yusheng Wu
Summary: Highly reactive CaO sorbents based on natural limestone with enhanced stability and re-usability were obtained through a pre-sintering-hydration method. These sorbents exhibited high CO2 capture capacity, improved cycle stability, and the ability to maintain a high capture capacity after multiple cycles. The improved properties can be attributed to the active mechanisms introduced by the pre-sintering-hydration treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Ceramics
O. A. Bragina, A. P. Nemudry
Summary: SrFe0.95Mo0.05O3-delta (SFM5) perovskite hollow fiber (HF) membranes with a finger-like structure were fabricated using a phase inversion technique. The oxygen flux through SFM5 hollow fiber membrane was evaluated and reached 0.64 mu mol/cm2 *s at T = 880 degrees C, which is 5 times higher than that of a disk SFM5 membrane (0.12 mu mol/ cm2 *s). A further increase in oxygen fluxes was attained by Ag deposition on the inner surface of SFM5 hollow fiber membrane. The oxygen flux of SFM5 HF membranes is governed by surface-exchange reactions on the permeate side. The equilibrium 3 -delta -lg pO2 -T diagrams showed that doping of SF by molybdenum leads to a broadening of the cubic perovskite phase stability region.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Leo Brody, Runxia Cai, Alajia Thornton, Junchen Liu, Hao Yu, Fanxing Li
Summary: Sorption-enhanced steam reforming using perovskite-based phase transition sorbents (PTSs) is an efficient strategy for producing concentrated hydrogen. This study investigates A- and B-site doped SrFeO3-delta sorbents for the reforming of glycerol. The results show that the PTSs demonstrate excellent catalytic activity, CO2 absorption capability, and stable performance.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Physics, Applied
Yangshi Jin, Fan Zhang, Kai Zhou, Chun Hung Suen, X. Y. Zhou, Ji-Yan Dai
Summary: This study demonstrates the photoflexoelectric effect in SrTiO3 single crystal and reveals the coupling mechanism between its photovoltaic and flexoelectric effect. Thermal annealing in vacuum induces oxygen vacancies in STO, leading to stronger light absorption and enlarged photoflexoelectric effect.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Applied
Wenjian Li, Yu Yin, Kuofeng Xu, Fengjiao Li, Kristina Maliutina, Qixing Wu, Cuihua Li, Bin Zhu, Liangdong Fan
Summary: In this study, cobalt compounds were used to modify (La, Sr)MnO3, improving the performance of the oxygen evolution reaction. By adjusting the loading amounts and phase-microstructure of the cobalt phase, better oxygen electrocatalytic activity was achieved. The research demonstrates that surface modification is an effective method to modify the intrinsic activity of OER inert perovskite materials for multifunctional applications.
Article
Chemistry, Multidisciplinary
Lei Cao, Oleg Petracic, Xian-Kui Wei, Hengbo Zhang, Tomas Duchon, Felix Gunkel, Alexandros Koutsioubas, Kirill Zhernenkov, Konstantin Z. Rushchanskii, Heinrich Hartmann, Marek Wilhelm, Zichao Li, Yufang Xie, Suqin He, Moritz L. Weber, Annika Stellhorn, Joachim Mayer, Shengqiang Zhou, Thomas Brueckel, Katefina Veltruska
Summary: The study investigates the evolution of oxygen content in La0.7Sr0.3MnO3-δ epitaxial thin films in real-time, shedding light on the kinetics of oxygen transport in emerging technologies. Through polarized neutron reflectometry, a quantitative depth profile of the oxygen content gradient is achieved, uniquely revealing the formation of a novel structural phase near the surface.
Article
Physics, Multidisciplinary
Bo Han, Ruixue Zhu, Xiaomei Li, Mei Wu, Ryo Ishikawa, Bin Feng, Xuedong Bai, Yuichi Ikuhara, Peng Gao
Summary: Disruptions in symmetry at structural defects such as grain boundaries can lead to the emergence of new properties, as demonstrated by the creation of a two-dimensional antiferrodistortive phase at a specific grain boundary in this study. This localized phase could have important implications for the electrical and optical activity of grain boundaries and potentially offer new strategies for future nanoelectronics.
PHYSICAL REVIEW LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Yong Wang, Chen Huang, Kaifeng Chen, Yang Zhao, Jingxuan He, Shibo Xi, Pei Chen, Xingyu Ding, Xiaoqiang Wu, Qingquan Kong, Xuguang An, Fazal Raziq, Xiaotao Zu, Yonghua Du, Haiyan Xiao, Kelvin H. L. Zhang, Liang Qiao
Summary: This research introduces a novel strategy to enhance the OER activity of perovskite oxides, specifically LaNiO3, by breaking long-range chemical bonds through amorphization. The amorphous structure induces a self-adaptive process, leading to a 9-fold increase in current density compared to epitaxial films, with the highest reported value in literature. This work provides a new protocol for boosting OER performance in perovskite oxides for future clean energy applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Juan Xie, Penghui Bai, Chenjie Wang, Ning Chen, Weifeng Chen, Ming Duan, Hu Wang
Summary: This study investigates the effect of doping SrTiO3 with an extremely low concentration of NiP on the catalytic activity of water splitting under visible light irradiation. It is found that the transformation of oxygen species and the construction of reactive lattice oxygen play a crucial role in improving the hydrogen generation performance. Adjusting the ratio of different oxygen species is an effective strategy to fabricate high-performance photocatalysts for H-2 evolution.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Feifei Dong, Lu Li, Ziqi Kong, Xiaomin Xu, Yaping Zhang, Zhenghui Gao, Biaokui Dongyang, Meng Ni, Quanbing Liu, Zhan Lin
Summary: The study investigates the performance of nickel-substituted perovskite Ba0.5Sr0.5Co0.8Fe0.2NixO3-δ as an OER catalyst, with BSCFN20 showing the best OER activity with low overpotential and Tafel slope. In water splitting experiments, using BSCFN20 as the anode and Pt/C as the cathode can achieve 50 mA cm(-2) with a low voltage, and BSCFN20||Pt/C remains stable for a long period, surpassing the state-of-the-art RuO2||Pt/C counterpart.
Article
Chemistry, Physical
Jiankang Liu, Tingting Zhang, Feng Ji, Zhongyi Liu, Zhiyuan Wang
Summary: In this study, a series of perovskite electrocatalysts with different deficiencies were synthesized and their catalytic activities for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline electrolytes were studied. It was found that there are two distinct oxygen reduction potential regions and the catalyst with the highest deficiency showed the highest activity. This work provides guidance for the further development of easily prepared and highly active perovskite metal oxides.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Chemical
Oscar Ovalle-Encinia, Han-Chun Wu, Tianjia Chen, Jerry Y. S. Lin
Summary: Experimental and simulation results demonstrate the feasibility of hydrogen production with simultaneous CO2 removal through steam reforming of methane in a CO2-perm-selective membrane reactor. The mathematical model accurately describes the process, showing that adjusting permeation number, Damkohler number, reaction pressure, and sweep side conditions can enhance H2 yield and CO2 recovery.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Energy & Fuels
Fateme Banihashemi, Amr F. M. Ibrahim, Shuguang Deng, Jerry Y. S. Lin
Summary: This study investigates the pyrolysis/gasification process of Galdieria sulphuraria and demonstrates its potential as a low-cost and sustainable energy resource for producing high-quality oil and syngas. The results show that temperature significantly affects the product yield, conversion rate, and gas composition. Catalytic gasification at low temperatures produces hydrogen-enriched syngas and high HHV bio-oil with lower oxygen and nitrogen content.
BIOENERGY RESEARCH
(2023)
Article
Engineering, Chemical
Fateme Banihashemi, Jerry Y. S. Lin
Summary: This study reports the successful synthesis of high-quality and stable ZIF-8 membranes on a sol-gel derived mesoporous gamma-alumina layer coated on top of the alpha-alumina support. The ZIF-8 membranes synthesized on the scalable gamma-alumina coated alpha-alumina support exhibit improved separation performance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Fateme Banihashemi, Jerry Y. S. Lin
Summary: This study investigates the influence of xylene activity on the vapor and liquid permeation/separation performance of b-oriented MFI zeolite membranes. The results showed that the permeance and separation factor increase with temperature, but decrease with increasing xylene activity. B-oriented MFI zeolite membranes exhibit better vapor permeation/separation performance compared to randomly oriented membranes, and show less negative effect of xylene activity on separation factor. However, both types of membranes show poor separation factor when operated in the pervaporation mode.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Oscar Ovalle-Encinia, Jerry Y. S. Lin
Summary: This study investigates the effects of high transmembrane pressure on CO2 permeation flux and the stability of molten carbonate in ceramic-carbonate dual-phase membranes. The results show a logarithmic relationship between CO2 permeation flux and CO2 pressure ratio, and indicate that CO2 permeation is mainly dominated by carbonate ionic conduction. The membranes exhibit high stability for high-temperature, high-pressure separation and chemical reaction applications.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Electrochemistry
Kishen Rafiz, Dheeraj Ram Lingam Murali, Jerry Y. S. Lin
Summary: This study demonstrates the use of plate-structured gamma-alumina separators with liquid electrolyte to improve the safety and cycling stability of lithium-ion batteries, without compromising battery performance.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Yue Zhao, Jiung Cho, Miri Choi, Cormac O. Coileain, Sunil Arora, Kuan-Ming Hung, Ching-Ray Chang, Mohamed Abid, Han-Chun Wu
Summary: In this study, the characteristics of InSe/SnS2 van der Waals heterojunction were investigated, showing that the polarity can be tuned by external electric field and illuminated light source. The heterojunction exhibits good performance as self-powered broadband photodetectors.
Article
Physics, Applied
Lili Zhou, Yanhui Lv, Yue Zhao, Gang Wu, Peiyao Xiao, Jiung Cho, Miri Choi, Cormac O. Coileain, Ching-Ray Chang, Han-Chun Wu
Summary: This study investigated how the electrical and photoelectrical properties of InSe based devices change depending on the interfaces made with standard materials such as SiO2, BN, and PMMA. The use of a BN layer was found to alter the carrier type and weaken the out-of-plane vibration of InSe. InSe on SiO2 showed p-type behavior in field-effect transistor devices, while InSe on BN exhibited majority electrons as carriers. Furthermore, the electron mobility of InSe on BN was significantly greater than its hole mobility on SiO2 due to weakened electron-phonon interaction. A p-n junction diode was also demonstrated, showing high rectification ratio and photoresponsivity that can be enhanced with a PMMA coverlayer. These findings contribute to the design of high-performance van der Waals heterojunction photodetectors.
APPLIED PHYSICS LETTERS
(2022)
Article
Engineering, Environmental
Oscar Ovalle-Encinia, Jerry Y. S. Lin
Summary: Water-gas-shift (WGS) reaction is a crucial step in IGCC power plants with CO2 capture, and using a CO2-permselective ceramic-carbonate dual-phase membrane reactor can enhance hydrogen yield and CO2 capture simultaneously. This study investigates the operation of WGS reaction in a samarium-doped ceria membrane reactor infiltrated with lithium/sodium molten carbonate. The results show that under certain conditions, high CO conversion and CO2 recovery can be achieved, but unwanted carbon deposition is observed in the catalyst-free membrane reactor.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Tianjia Chen, Yanyang Xu, Yinmin Zhang, Yanbing Gong, Yongfeng Zhang, Jerry Y. S. Lin
Summary: This study reports a new structure of ceramic-carbonate dual-phase hollow fiber membrane with high CO2 permeance and superior mechanical strength for CO2 separation. The unique double-layer structure of the membrane enables a significant improvement in mechanical strength, resulting in a higher CO2 flux.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Yue Zhao, Gang Wu, Kuan-Ming Hung, Jiung Cho, Miri Choi, Cormac O. Coileain, Georg S. Duesberg, Xiang-Kui Ren, Ching-Ray Chang, Han-Chun Wu
Summary: In this work, we fabricated field effect transistor gas sensors based on mechanically exfoliated van der Waals (vdW) layered materials and investigated their electrical field-dependent gas sensing properties. The results showed good agreement between experimental and theoretical values, indicating the validity of the Langmuir absorption model for vdW materials. Additionally, we demonstrated that the device sensing behavior strongly depends on carrier availability, leading to giant sensitivities and strong selectivity at the sensitivity singularity. Furthermore, our study revealed that these features can be utilized to quickly detect and differentiate low concentrations of mixed hazardous gases using sensor arrays.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Oscar Ovalle-Encinia, Jerry Y. S. Lin
Summary: This work evaluates the characteristics of porous ceramic tubes prepared by centrifugal casting (CC) and cold isostatic pressing (CIP) methods. The results show that CIP method produces ceramic tubes with lower porosity and average pore size, suitable for low porosity or dense ceramic tubes, while CC method is suitable for high-porosity ceramic tubes or tubes with pore gradient tube wall.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Electrochemistry
Kishen Rafiz, N. R. D. Harika, Jerry Y. S. Lin
Summary: This study reports the use of plate-shaped zeolite particles to form an electrode-coated separator for lithium-metal batteries. These separators show promise in preventing dendrite propagation and have better charge/discharge characteristics compared to traditional separators. The results suggest that the unique physical properties and morphology of the zeolite particles contribute to their effectiveness in homogenizing Li-ion flux and preventing dendrite formation.
ELECTROCHIMICA ACTA
(2023)
Article
Engineering, Chemical
Dheeraj R. L. Murali, Fateme Banihashemi, Jerry Y. S. Lin
Summary: Zeolite membrane separators with tailored pore structure and surface chemistry have been developed for the preparation of fire-safe lithium-ion batteries. Compared to commercial polypropylene (PP) separators, these zeolite separators exhibit better wettability, enabling fabrication of high-performance batteries. The results show that the new fire-safe lithium-ion batteries exhibit excellent charge and discharge characteristics and cycle performance.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Jerry Y. S. Lin, Oscar Ovalle-Encinia
Summary: This paper presents a theoretical approach for the pressure dependence of gas permeation flux in dual-phase ionic-conducting membranes, using CO2 permeation in samarium-doped-ceria/molten-carbonate membranes as an example. The model shows that gas permeation is controlled by the materials' intrinsic conductivities and the geometric factors of each phase. The topological structure, which is determined by synthesis method and conditions, can lead to different pressure-dependent flux equations.
JOURNAL OF MEMBRANE SCIENCE LETTERS
(2023)
