Article
Energy & Fuels
A. Cammarata, L. Mastropasqua
Summary: This paper develops analytical equations for calculating the theoretical OCV using the mixed potential theory, using the case of H-2 and CO co-oxidation (or H2O and CO2 co-reduction) in solid oxide cells as a reference case. The results show good agreement with experimental literature data, except for mixtures with relatively large CH4 concentration. A fuel cell polarization model based on the calibration results is also developed to predict the polarization behavior of a SOFC fed with a H-2-H2O-CO-CO2 fuel mixture, indicating that either H-2 or CO may be reduced rather than oxidized via an equivalent water-gas-shift reaction.
FRONTIERS IN ENERGY RESEARCH
(2023)
Article
Chemistry, Physical
Sizhe Li, Xue Chen, Hao Wu, Chang Liu
Summary: The study of ZnO TFTs reveals that the choice of electrode materials significantly impacts performance, with silver electrodes performing the best. Despite a channel length as short as 2 µm, ZnO TFTs with silver electrodes can produce sufficient current to drive micro LEDs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Computer Science, Interdisciplinary Applications
Yang Ye, Yawu Zeng, Xi Chen, Hanqing Sun, Wenjun Ma, Zhixiong Peng
Summary: Research on the normal restitution coefficient in practical rockfall trajectory analysis emphasized the size and velocity dependences, resulting in the development of a new impact device and proposed contact model. The study found that the size and rate-dependent strength significantly affect the NCOR, with size having a greater influence than impact velocity.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Chemistry, Analytical
Canwei Mao, Dajing Yuan, Lu Wang, Eric Bakker
Summary: Thin ion-selective membrane films deposited on solid electrode substrates are useful tools for studying ion transfer processes. The experimental conditions can be chosen to make diffusion processes within the membrane and contacting aqueous solution not rate limiting, allowing equilibrium considerations to describe ion transfer voltammograms. This work describes a model system that agrees with thermodynamic theory, using a redox molecule and a monovalent reference cation for ion transfer. The results show that the full peak width is consistent with theory, with peak current proportional to scan rate supporting thin layer behavior.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Biwas Subedi, Chongwen Li, Cong Chen, Dachang Liu, Maxwell M. Junda, Zhaoning Song, Yanfa Yan, Nikolas J. Podraza
Summary: The Urbach energy is a commonly used indicator of the electronic quality of thin-film materials in solar cells, and is influenced by the anion-cation composition. The correlation between the Urbach energy and the open-circuit voltage deficit of the perovskite thin film shows a direct relationship. However, some perovskite films show a lower Urbach energy but a higher open-circuit voltage deficit due to issues related to material quality and film processing techniques.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Biwas Subedi, Chongwen Li, Cong Chen, Dachang Liu, Maxwell M. Junda, Zhaoning Song, Yanfa Yan, Nikolas J. Podraza
Summary: The Urbach energy, indicating the electronic quality of thin-film materials used in solar cells, is influenced significantly by the anion-cation composition in hybrid inorganic-organic metal halide perovskites. Different compositions lead to variations in the Urbach energy, demonstrating a direct relationship with the open-circuit voltage deficit in solar cells utilizing these materials.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Wei Wei, Wen Chen, Xizhu Zhao, Zifan Yang, Yueli Liu
Summary: The introduction of PMMA buffer layer can significantly suppress the interface carrier recombination in all-inorganic CsPbI3 quantum dots perovskite solar cells, improve the open-circuit voltage, enhance the power conversion efficiency, and increase stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Environmental Sciences
Hamidreza Rahimi, Cristina Maria Sena Fael, Catia Sofia Batista Taborda, Saiyu Yuan, Xiaonan Tang, Prateek Kumar Singh, Emad Fardoost, Cesar Augusto Vaz Santos
Summary: Vegetation plays a crucial role in the flow characteristics of natural open channels, with higher density in the lower layer and sparser in the upper layer. This research used Ansys Fluent and the k-epsilon model to simulate different vegetation configurations and demonstrated that the numerical results align with anticipated Turbulence Kinetic Energy data. The findings revealed that double-layer vegetation induces a more intricate flow distribution, with decreased Turbulence Kinetic Energy in between vegetation zones.
Article
Psychology, Mathematical
Yuqing Cai, Christoph Strauch, Stefan van der Stigchel, Marnix Naber
Summary: This article introduces an open-source toolkit called Open-DPSM for modeling the changes in pupil size in response to dynamic visual inputs. The toolkit improves the prediction of pupil size changes and provides Python functions and a graphical user interface. Users can use the predicted pupil trace to mitigate the effects of low-level features or evaluate the efficacy of low-level feature manipulations.
BEHAVIOR RESEARCH METHODS
(2023)
Article
Electrochemistry
Nicolo Pianta, Federico Scarpioni, Richard Chukwu, Fabio La Mantia, Riccardo Ruffo
Summary: Dynamic Electrochemical Impedance Spectroscopy (DEIS) is a useful tool for studying the kinetic parameters of non-Faradic processes in Electrochemical Double Layer Capacitors (EDLC) under non-equilibrium conditions. DEIS measures the frequency-dependent impedance during a dynamic process with overpotential, making it superior to classic Electrochemical Impedance Spectroscopy. However, there are challenges in sampling signals and manipulating data to obtain impedance spectra at low frequencies. This study used the Dynamic Multi-Frequency Analysis algorithm to compute impedance and reconstruct the cyclic voltammetry profile. Kinetic parameters, such as double layer capacitance and adsorption phenomenon, were extracted from an equivalent circuit model regression and impedance spectra dataset during a full charge/discharge cycle, revealing potential dependence and the presence of side re-actions.
ELECTROCHIMICA ACTA
(2023)
Article
Nanoscience & Nanotechnology
Jesus Gandara-Loe, Rocio Bueno-Perez, Alexander Missyul, David Fairen-Jimenez, Joaquin Silvestre-Albero
Summary: The evaluation of flexibility in ZIFs is crucial for understanding their gas adsorption performance. In this study, adsorption properties of ZIF-62 were analyzed through various techniques, revealing the impact of temperature on gas access to internal porosity and structural transitions. The study also predicts the preferential adsorption of alkanes over alkenes in ZIF-62 for small hydrocarbons, with kinetic restrictions playing a key role in adsorption of larger hydrocarbons.
ACS APPLIED NANO MATERIALS
(2021)
Article
Physics, Applied
Kuibo Lan, Gaojie Wen, Junqing Wei, Zhi Wang, Guoxuan Qin
Summary: This paper presents an effective non-destructive failure analysis method based on dynamic InGaAs photon emission microscopy and schematic/layout analysis to determine the type and position of open circuit defects in mixed signal IC on SOI. The proposed method accurately detects open circuit failures efficiently.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Engineering, Chemical
Mohit Gupta, Kaiwu Huang, Aaron Noble, Roe-Hoan Yoon
Summary: A flotation model based on hydrophobic force was developed to simulate a large porphyry copper flotation plant. The model predicts grade vs. recovery curves for the flotation bank by using the size-by-class liberation matrix of the flotation feed. With simplified assumptions, the model can be used to predict the performance of a flotation circuit. The results suggest that significant financial benefits can be achieved by recovering slow-floating particles from cleaner-scavenger tails using advanced separation technology in a separate copper recovery unit.
MINERALS ENGINEERING
(2023)
Article
Engineering, Environmental
Bishnu Bhattarai, Davide Dionisi, Waheed Afzal
Summary: This study investigated the aerobic biodegradation of paracetamol as sole carbon and energy source and found that it had a slower degradation rate and longer acclimation time compared to glucose, although it could be fully degraded at all concentrations. The microbial growth on paracetamol was characterized by lower maximum specific growth rate, slightly higher growth yield, and higher time constant for acclimation, compared to glucose.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Analytical
V. V. Emets, I. M. Gavrilin, T. L. Kulova, A. M. Skundin, A. M. Sharafutdinova, S. A. Gavrilov
Summary: Electrochemical impedance spectroscopy was used to study the process of lithium ion insertion into germanium nanowire electrodes at different temperatures. Results showed that with an increase in lithiation degree, the resistance of the solid electrolyte film and charge transfer resistance values also increased accordingly.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
