Article
Chemistry, Physical
Fan He, Qinning Gao, Zuoqing Liu, Meiting Yang, Ran Ran, Guangming Yang, Wei Wang, Wei Zhou, Zongping Shao
Summary: The use of a new Ba(Zr0.1Ce0.7Y0.1Yb0.1)(0.95)Pd0.05O3-delta perovskite as the key component in ammonia-fueled PCFCs improves catalytic activity for NH3 decomposition and increases proton conductivity, leading to higher power density and stability.
ADVANCED ENERGY MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Jian Song, Yuepeng Hei, Claudia Li, Naitao Yang, Bo Meng, Xiaoyao Tan, Jaka Sunarso, Shaomin Liu
Summary: In this study, BaCe0.85Tb0.05Co0.1O3-δ (BCTCo) perovskite hollow fiber membranes and SrCe0.95Yb0.05O3-δ (SCYb) perovskite oxide were used as catalysts to achieve the catalytic dehydrogenation coupling of methane, leading to increased C-2 hydrocarbon yield.
Article
Engineering, Chemical
Na Rae Kang, Thanh Huong Pham, Hannes Nederstedt, Patric Jannasch
Summary: Phosphonated aromatic polymers functionalized with highly acidic perfluorophenylphosphonic acid show high conductivity, efficient ionic clustering, excellent proton conductivity, and outstanding thermal stability, making them attractive for applications in catalyst layers and proton exchange membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Physical
Sathish Rajendran, Naresh Kumar Thangavel, Samia Alkatie, Yi Ding, Leela Mohana Reddy Arava
Summary: Tri-doping of barium cerium zirconate with rare earth elements Pr, Gd, and Y was studied to enhance sinterability, chemical stability, and proton conductivity. Varying the concentrations of dopants showed significant effects on the microstructure and conductivity of the electrolyte materials. The tri-doped electrolytes exhibited excellent chemical stability and high proton conductivity values at elevated temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Biochemistry & Molecular Biology
Galina F. Prozorova, Alexander S. Pozdnyakov
Summary: In this article, a comparative analysis was conducted on the physicochemical, dielectric, and proton-conducting properties of composite polymer materials based on 1H-1,2,4-triazole. The results showed that 1H-1,2,4-triazole and its homopolymers and copolymers have promising potential for the development of proton-conducting fuel cell membranes. These materials improve the characteristics of electrolyte membranes, enhance their film-forming ability, increase thermal and electrochemical stability, and provide high ionic conductivity under anhydrous conditions at high temperatures.
Article
Chemistry, Multidisciplinary
Cheng-Chieh Lin, Ting-Ran Liu, Sin-Rong Lin, Karunakara Moorthy Boopathi, Chun-Hao Chiang, Wen-Yen Tzeng, Wan-Hsiu Chang Chien, Hua-Shu Hsu, Chih-Wei Luo, Hui-Ying Tsai, Hsin-An Chen, Pai-Chia Kuo, Jessie Shiue, Jau-Wern Chiou, Way-Faung Pong, Chia-Chun Chen, Chun-Wei Chen
Summary: Spin-polarized electrons in CsPbBr3 halide perovskite nanoplates (NPLs) can be manipulated by doping manganese cations (Mn2+) and applying an external magnetic field, leading to improved photocatalytic CO2 reduction reaction (CO2RR) efficiencies. The photocatalytic CO2RR of Mn-doped CsPbBr3 NPLs is significantly enhanced by applying an external magnetic field, resulting in prolonged carrier lifetime and suppressed charge recombination.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Kosuke Sonda, Taiga Kodama, Maria Drira Wea Siga, Keigo Masumoto, Masaru Iwai, Muhammad Fadil, Muhammad Sohail Ahmad, Jonas Karl Christopher Agutaya, Yusuke Inomata, Armando T. Quitain, Andri Hardiansyah, Tetsuya Kida
Summary: A study focused on developing electrochemical sensors based on proton-conducting graphene oxide (GO) nanosheets for the detection of carbon monoxide (CO) at room temperature. The sensors, composed of a Ce-doped GO nanosheet membrane and a sensing electrode made of Pt (10 wt %)-doped SnO2 nanocrystals, exhibited excellent response to CO. The strong adsorption of CO on the Pt sites and the anodic oxidation of adsorbed CO at the interface between the sensing electrode and proton-conducting membrane contribute to the selective sensor response.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Shuangbin Li, John T. S. Irvine
Summary: The demand for clean and sustainable energy has led to a growing interest in high temperature proton-conducting perovskite oxides, which show promising applications in the intermediate temperature range for clean energy. The control of defect chemistry is crucial in fine tuning properties for these applications, with a focus on structure-property relations and non-stoichiometry of perovskites.
SOLID STATE IONICS
(2021)
Article
Chemistry, Physical
Zhaoling Wei, Jinpeng Wang, Xinchao Yu, Zhongbiao Li, Yujun Zhao, Jinling Chai
Summary: The study prepared a new triple-conducting BFCY perovskite cathode using the Pechini sol-gel process and found that it has good thermal expansion coefficient and chemical compatibility. The construction of a BFCY-BCFY composite cathode with good cathode/electrolyte interface adhesion was successful, and the single cell achieved low polarization resistance and high peak power density at 700 degrees Celsius.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
K. Karuppasamy, Dhanasekaran Vikraman, Kyu-Won Jang, Seenu Ravi, Waqas Hassan Tanveer, Ranjith Bose, Maiyalagan Thandavarayan, Hyun-Seok Kim
Summary: This study demonstrates the synthesis of carbohydrate polymer phytagel based composite proton exchange membranes for proton exchange membrane fuel cells. By loading different amounts of sulfamic acid, the proton conductivity of the membranes can be substantially improved without affecting other properties. The highest proton conductivity was achieved with 7 wt% sulfamic acid, showing excellent performance in single cell tests compared to other membranes at elevated temperature and high humidity conditions.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Toshishige Yamada, Ekaterina Ponizovskaya Devine, Soroush Ghandiparsi, Cesar Bartolo-Perez, Ahmed S. Mayet, Hilal Cansizoglu, Yang Gao, Ahasan Ahamed, Shih-Yuan Wang, M. Saif Islam
Summary: A theory is proposed for the physics of nanohole silicon PIN/NIP photodetectors, and experiments validate the findings. It is discovered that nanohole PDs produce photons slower than those in bulk silicon, but carriers remain unchanged, exhibiting different behaviors in steady state and transient characteristics.
Article
Chemistry, Physical
Xihan Tan, Zhangfeng Shen, Awais Bokhari, Muhammad Abdul Qyyum, Ning Han
Summary: This article discusses the principle, preparation method, and application of perovskite-type proton conductor hydrogen permeable membrane. It also explores the development trend of this material.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Libin Lei, Yongzhen Ou, Ruiming Qiu, Wenchao Lian, Yingyu Mo, Jihao Zhang, Zhicong Shi, Jianping Liu, Chao Wang, Ying Chen
Summary: An electrochemical model of PCECs was developed in this study to evaluate and compare the performance in different operating modes, revealing that the hydrogen pump mode achieves higher energy efficiency. Additionally, introducing steam to the anode side was found to have a positive impact on the electrochemical performance of PCECs.
JOURNAL OF POWER SOURCES
(2022)
Article
Thermodynamics
Mayaram Sahu, Jahar Sarkar, Laltu Chandra
Summary: This study investigates the effects of different assumptions on simulating single-phase natural circulation loops, focusing on Boussinesq approximation, property variation, and heat flux distributions. The results show that Boussinesq approximation under-predicts mass flow rate and effectiveness, while over-predicting entropy generation rate. Fluid and solid conduction are crucial for simulating transient characteristics, with Gaussian heat flux distribution showing the highest mass flow rate and non-linear heat flux showing the highest effectiveness and entropy generation.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Multidisciplinary
Zhiyang Zeng, Ruiyang Song, Shengping Zhang, Xiao Han, Zhen Zhu, Xiaobo Chen, Luda Wang
Summary: The introduction of N-doped graphene membranes (NGMs) in the study increased the permeance and selectivity of protons, showing significant advantages over commercial PEMs and providing a high-performance solution for practical applications.
Article
Energy & Fuels
Anyka M. Bergeson-Keller, Michael D. Sanders, Ryan P. O'Hayre
Summary: This study compared the effects of different compositions of Sr1-xCexMnO3 and CexSr(2-x)MnO(4) on solar thermochemical hydrogen production through experiments and thermodynamic analysis. Experimental results showed that the SCM family produced slightly more hydrogen per mole of oxide compared to the CSM family under similar conditions, but a direct correlation between structure, cerium content, and water-splitting capacity could not be determined.
Article
Engineering, Chemical
Canan Karakaya, Jake Huang, Christopher Cadigan, Adam Welch, Jonathan Kintner, Joseph Beach, Huayang Zhu, Ryan O'Hayre, Robert J. Kee
Summary: This study documents the development and performance of a nano-phase Ru catalyst on a (BaO)(2)(CaO)(Al2O3) support, with a detailed 12-step reaction mechanism for ammonia synthesis validated using packed-bed experiments. Important coverage-dependent activation barriers and catalyst-support interactions are discussed for optimizing reactor design and operating conditions.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Physical
Samantha L. Millican, Ann M. Deml, Meagan Papac, Andriy Zakutayev, Ryan O'Hayre, Aaron M. Holder, Charles B. Musgrave, Vladan Stevanovic
Summary: This paper presents a new method for accurately predicting defect concentrations in complex oxides, taking into account atomic and magnetic disorder as well as effects beyond the dilute defect limit. Using this method, the predicted defect concentrations are in good agreement with experimental values.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Einar Vollestad, Vegar Oygarden, Joachim Seland Graff, Martin Fleissner Sunding, John D. Pietras, Jonathan M. Polfus, Marie-Laure Fontaine
Summary: This study thoroughly investigates the impact of MnO2 as a co-dopant on the sinterability, thermal expansion, crystal structure, and ionic conductivity of ScSZ electrolytes. The results show that the addition of 2 mol% MnO2 significantly enhances the oxide ion conductivity, lowers the peak sintering temperature, and stabilizes the cubic structure. It is also found that manganese predominantly enters the structure as Mn2+ and higher valence states are present at the surface and grain boundaries.
Article
Chemistry, Physical
Zehua Pan, Chuancheng Duan, Tyler Pritchard, Amogh Thatte, Erick White, Robert Braun, Ryan O'Hayre, Neal P. Sullivan
Summary: Electrochemical production of CH4 from CO2-H2O using protonic ceramic electrolysis cells (PCEC) shows high yield and potential economic benefits and scalability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Energy & Fuels
Michael D. Sanders, Anyka M. Bergeson-Keller, Eric N. Coker, Ryan P. O'Hayre
Summary: This study introduces a method called Temperature-Programmed Thermal Redox (TPTR) for evaluating the performance of materials in solar thermochemical hydrogen production (STCH). TPTR can predict the water-splitting performance of materials and help with initial screening. The study discusses the pros and cons of TPTR and proposes its use in the STCH community.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Long Q. Le, Charlie Meisel, Carolina H. Hernandez, Jake Huang, Youdong Kim, Ryan O'Hayre, Neal P. Sullivan
Summary: Proton-conducting ceramics play an important role in electrochemical electricity generation, energy storage, and fuels synthesis. The study finds that the durability of protonic-ceramic electrolyzers is superior to fuel cells. The introduction of an interlayer greatly reduces the degradation rate in both fuel cells and electrolyzers.
JOURNAL OF POWER SOURCES
(2022)
Article
Energy & Fuels
C. Herradon, L. Le, C. Meisel, J. Huang, C. Chmura, Y. D. Kim, C. Cadigan, R. O'Hayre, N. P. Sullivan
Summary: This study investigates the performance of protonic ceramic unit-cell stacks in pressurized steam electrolysis. The results show that increasing the pressure can significantly improve the electrolysis efficiency and reduce the cell's ohmic resistance and polarization resistance.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Chuan Zhou, Dongliang Liu, Meijuan Fei, Xixi Wang, Ran Ran, Meigui Xu, Wei Wang, Wei Zhou, Ryan O'Hayre, Zongping Shao
Summary: In this study, the balance between hydration reaction and oxygen reduction reaction (ORR) over protonic ceramic fuel cells (PCFCs) cathode is optimized by controlling the air flow rate. Different cathode materials show different optimal performance under various operating conditions. The study provides important insights into the environmental demands of PCFC cathodes during operation and offers useful guidance for further performance optimization.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Yasir Arafat, Muhammad Rizwan Azhar, Yijun Zhong, Ryan O'Hayre, Moses O. Tade, Zongping Shao
Summary: This study presents a method of in situ exsolution of CoFe nanoalloys on the surface of Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) perovskite under a N-2 atmosphere, facilitated by organic ligands. The resulting BSCF/CoFe electrode exhibits enhanced electrochemical bi-functional performance, making it a promising candidate for air electrodes in zinc-air batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Meagan C. C. Papac, Jake Huang, Andriy Zakutayev, Ryan O'Hayre
Summary: Through combinatorial experimental methods and multidimensional Bayesian analysis, the dependency of triple ionic-electronic conducting oxides (TIECs) on chemical composition and environmental conditions in high-temperature electrochemical applications is investigated. The study reveals that Co-rich compositions achieve the lowest overall polarization resistance, while Fe substitution may increase polarization resistance. This work provides a map of electronic properties of TIEC materials under relevant conditions, and demonstrates a unique approach to studying TIECs combining combinatorial experiments and Bayesian analysis.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Shiqing Hu, Bingjie Pang, Liming Zhang, Zhongwei Cao, Peng Zhang, Yunjie Ding, Ryan O'Hayre, Xuefeng Zhu, Weishen Yang
Summary: Preventing Ni oxidation and carbon deposition in CO2 electrolysis is a critical challenge for solid oxide electrolysis cells (SOECs). This study reveals that the Nernst voltage, in relation to the operating voltage, controls these reactions and enables the establishment of a reaction phase diagram. The successful demonstration of pure CO2 electrolysis without Ni oxidation and carbon deposition is achieved in Ni-based cathode supported SOECs.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Electrochemistry
Jake Huang, Neal P. Sullivan, Andriy Zakutayev, Ryan O'Hayre
Summary: The distribution of relaxation times (DRT) is a versatile method for analyzing electrochemical impedance spectroscopy (EIS) data from complex devices. It does not require a generative model, making it useful when the system's governing principles are not fully understood. However, DRT estimation is an ill-posed problem that relies on subjective choices of regularization and tuning, leading to the risk of misleading interpretations of the data.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Applied
Xuhao Liu, Zilin Yan, Junwei Wu, Jake Huang, Yifeng Zheng, Neal P. Sullivan, Ryan O'Hayre, Zheng Zhong, Zehua Pan
Summary: A deep-learning-based framework is proposed to predict the impedance response and underlying electrochemical behavior of reversible protonic ceramic cells. Electrochemical impedance spectra (EIS) were used to train an artificial neural network (ANN) model, and the predicted EIS data were compared to the experimental data to assess the accuracy. The study shows that the ANN model can effectively predict both the EIS and the distribution of relaxation times (DRT) of complex electrochemical systems.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Daniel R. Clark, David R. Diercks, Sandrine Ricote, Tania Tauer Dearden, Neal P. Sullivan, J. Will Medlin, Brian P. Gorman, Ryan P. O'Hayre
Summary: This study characterizes the grain boundary (GB) chemistry of BZY10 samples prepared by four different methods using laser-pulsed atom probe tomography (APT). Oxygen depletion and varying segregation/depletion behaviors of cation constituents were observed at the GBs. Common impurities such as Al, Fe, Mg, Si, and Sr were also found to accumulate at the GBs. The study reveals the complexity of BZY10 GB chemistry and the unexpected differences in GB chemistry between adjacent boundaries.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
