Article
Chemistry, Physical
Xianxian Xie, Athira Lekshmi Mohandas Sandhya, Lesia Piliai, Mykhailo Vorokhta, Iva Matolinova, Ivan Khalakhan
Summary: Platinum-based bimetallic alloys possess unique activities exceeding those of pure platinum. They suffer from surface structural reorganization under operating conditions, significantly affecting their lifetime performance. This study investigates the surface compositional changes in a PtNi catalyst during repetitive cycles and confirms the resulting catalyst deactivation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Materials Science, Multidisciplinary
Stefan-Marian Iordache, Eusebiu Ilarian Ionete, Ana-Maria Iordache, Ioan Stamatin, Nicolae Catalin Zoita, Arcadie Sobetkii, Cristiana Eugenia Ana Grigorescu
Summary: A sensitive material based on a palladium-functionalized CNT composite was proposed to evaluate deuterium concentration in aqueous samples. Cyclic voltammetry and impedance spectroscopy studies confirmed the sensing behavior of the material, showing quasi-reversible process with low desorption tendency for hydrogen atoms.
Article
Chemistry, Physical
Vikas Kumar Pandey, Sanjeev Verma, Bhawna Verma
Summary: This study investigated the use of waste coconut shells to prepare activated carbon and its application in the fabrication of a ternary hybrid composite. The fabricated electrode exhibited high specific capacitance and excellent cycle stability, which could contribute to the development of new generation energy storage devices.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Bianca Seidler, Jens H. Tran, Julian Hniopek, Philipp Traber, Helmar Gorls, Stefanie Grafe, Michael Schmitt, Jurgen Popp, Martin Schulz, Benjamin Dietzek-Ivansic
Summary: In this study, the photophysical behavior of four panchromatically absorbing copper complexes was investigated using experimental and computational methods. The results showed similar excited-state dynamics under different excitation conditions. The study also revealed fast excited-state relaxation and nonradiative decay processes.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Physical
Jiabin Xu, Kun Feng, Yufeng Chen, Jun Zhong
Summary: In this study, a CuxCo1-xPtyO/RGO catalyst composite was prepared for the hydrolysis of ammonia borane, exhibiting high catalytic activity. The metallic Pt in the catalyst was identified as the true catalytic center, while Co acted as an electron donor to form Co-Pt bonds. Cu contributed to the stability of the catalyst, and RGO as a support facilitated charge transfer and particle dispersion.
APPLIED SURFACE SCIENCE
(2021)
Article
Electrochemistry
Sunil Kavunga, Gerald Luckeneder, Ernst Dietmar Schachinger, Josef Faderl, Guenter Fafilek
Summary: Thermally treated and untreated galvanized low-alloy steel 22MnB5 was investigated using high-temperature cyclic voltammetry (HT-CV), revealing redox peaks of iron, zinc, and manganese, with the ability to distinguish solid and liquid zinc based on different kinetics of the Zn/ZnO redox reaction.
ELECTROCHIMICA ACTA
(2022)
Article
Materials Science, Multidisciplinary
Naseem Akhtar, Malika Rani, Arshad Mahmood, Kashmala Tariq, G. Murtaza, Asma A. Alothman, Rahaf S. AL-zahrani, Sajid Ali, Naveed Kasuar Janjua, Aqeel Shah
Summary: This work successfully synthesized NaCr2O4/GO nanocomposite using co-precipitation method for energy storage applications. Characterizations such as SEM and XRD were performed to investigate the optical and structural properties. The nanocomposite showed reduced crystalline size and high specific capacitance, making it suitable for various applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Environmental
Xiangyang He, Xu Zhang, Baoquan Li, Shujuan Zhou, Yuyuan Zhao, Li Wang, Jin Xu, Huizhong Yan
Summary: La-Y-Ni-based alloys have potential as hydrogen storage materials, but their rapid capacity degradation limits their applications. This study investigates the capacity degradation mechanism of these alloys and the effect of the La/Y ratio on their cyclic stability. The expansion/contraction properties of the subunits in the hydrogen solid solution and hydrides lead to lattice strain and pulverization. Adjusting the subunit ratio can decrease lattice strain and improve cyclic stability. The cyclic stability in the electrolyte decreases with a lower La/Y ratio, opposite to the trend observed in the solid/H-2 system. Y-poor and Y-rich alloys are suitable for electrochemical and solid-state hydrogen storage applications, respectively.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Shahid Alam, Muhammad Zahir Iqbal, Junaid Khan
Summary: The study reports the synthesis of nickel-manganese phosphate and polyaniline-based ternary composites via a facile sonochemical method for high-performance energy storage applications. The composites show excellent electrochemical performance, with the supercapattery device delivering remarkable specific energy and power, along with high capacity retention after 5000 cycles. Dunn's model confirms the hybrid nature of the device, showcasing the potential of these ternary composites for cost-effective and efficient energy storage systems.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Krystina E. Lamb, Colin J. Webb
Summary: Hydrogen storage is important for transitioning to cleaner energy systems. Metal hydride materials, such as core-shell V90Al10-Pd80Ag20, could increase hydrogen storage density and decrease compression costs. This article evaluates the technical viability of V90Al10-Pd80Ag20 and compares its hydrogen-storage capacity to other materials.
Article
Chemistry, Analytical
M. Lukaszewski, M. Soszko, A. Czerwinski
Summary: The stoichiometry of surface oxides on Pt-Pd-Ru alloys in 0.5 M H2SO4 aqueous solutions was proposed based on cyclic voltammetric and electrochemical quartz crystal microbalance measurements. The average metal oxidation state in the oxides depends on the potential of their formation, alloy composition, and homogeneity. The highest metal oxidation state (+8) was observed for the 10% Pt-25% Pd-65% Ru alloy, while the lowest one (+4) was observed for the 35% Pt-26% Pd-38% Ru alloy. Preliminary hydrogen electrosorption on Pd-rich or Ru-rich Pt-Pd-Ru alloys resulted in a decrease in the average metal oxidation states in surface oxides, while the influence of hydrogen treatment was negligible for other alloys.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Alicja Stachowiak, Kamil Kedzierski, Boleslaw Barszcz, Kamil Kotwica, Danuta Wrobel
Summary: Spectroscopic and electrochemical studies were conducted to determine the energy gaps of four commercially available phthalocyanines, revealing the influence of molecular structure on the energy gaps. Experimental results were highly compatible with DFT calculations, but MP2 method results showed significant discrepancies with both.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Zhiping Lin, BeiBei Xiao, Min Huang, Linghui Yan, Zongpeng Wang, Yucong Huang, Shijie Shen, Qinghua Zhang, Lin Gu, Wenwu Zhong
Summary: Alloying noble metals with non-noble metals is a promising method to fabricate catalysts, and electron-abundant Ir/Rh sites in Ir1-xRhxSb alloys show outstanding activity for the hydrogen evolution reaction (HER).
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Firoz Shah Tuglak Khan, Amy L. Waldbusser, Maria C. Carrasco, Hadi Pourhadi, Shabnam Hematian
Summary: This study presents a facile strategy for preparing a series of ferricenium complexes with weakly coordinating anions, and thoroughly investigates their ground state electronic structures, revealing the significant impact of substituents on metal-ligand separations in oxidized species.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Analytical
P. Chithra Lekha, Y. Ram Babu, V. T. Fidal Kumar, T. S. Chandra, Somnath C. Roy
Summary: The Ti/ML-TNT/HRP/Nafion (c) sensor device, fabricated using TiO2 multileg nanotubes, exhibits excellent biosensing performance for different concentrations of hydrogen peroxide. Further analysis shows high sensitivity and selectivity towards H2O2 detection, with a wide detection range and low detection limit.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
M. Pajak, K. Hubkowska, A. Czerwinski
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2018)
Review
Electrochemistry
Jakub Lach, Kamil Wrobel, Justyna Wrobel, Piotr Podsadni, Andrzej Czerwinski
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2019)
Article
Electrochemistry
Katarzyna Hubkowska, Michal Soszkoh, Michal Krajewski, Andrzej Czerwinski
ELECTROCHEMISTRY COMMUNICATIONS
(2019)
Article
Chemistry, Physical
Maciej Ratynski, Bartosz Hamankiewicz, Michal Krajewski, Maciej Boczar, Dominika Ziolkowska, Andrzej Czerwinski
Article
Electrochemistry
M. Pajak, K. Hubkowska, A. Czerwinski
ELECTROCHIMICA ACTA
(2019)
Article
Chemistry, Physical
Maciej Ratynski, Bartosz Hamankiewiecz, Michal Krajewski, Maciej Boczar, Dominika A. Buchberger, Andrzej Czerwinski
Article
Chemistry, Physical
Malgorzata Karwowska, Karol J. Fijalkowski, Andrzej A. Czerwinski
Article
Chemistry, Physical
Katarzyna Hubkowska, Suwaphid Themsirimongkon, Surin Saipanya, Mariusz Lukaszewski, Andrzej Czerwinski
Article
Chemistry, Physical
Maciej Boczar, Michal Krajewski, Bartosz Hamankiewicz, Maciej Ratynski, Dominika Buchberger, Andrzej Czerwinski
Article
Chemistry, Analytical
M. Soszko, M. Lukaszewski, A. Czerwinski
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2020)
Article
Electrochemistry
K. Hubkowska, A. Czerwinski
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2020)
Article
Electrochemistry
M. Pajak, K. Hubkowska, A. Czerwinski
ELECTROCHEMISTRY COMMUNICATIONS
(2020)
Article
Biochemistry & Molecular Biology
Maciej Ratynski, Bartosz Hamankiewicz, Dominika A. Buchberger, Andrzej Czerwinski
Article
Chemistry, Physical
Janusz Kozakiewicz, Jaroslaw Przybylski, Bartosz Hamankiewicz, Krystyna Sylwestrzak, Joanna Trzaskowska, Michal Krajewski, Maciej Ratynski, Witold Sarna, Andrzej Czerwinski
Article
Electrochemistry
Maciej Ratynski, Bartosz Hamankiewicz, Dominika A. Buchberger, Maciej Boczar, Michal Krajewski, Andrzej Czerwinski
BATTERIES & SUPERCAPS
(2020)