Article
Materials Science, Ceramics
Fei Chu, Kaiyao Wu, Yuying Meng, Deqiang You, Wei Li, Huai-Jun Lin
Summary: Corrosion treatment on amorphous Fe78Si9B13 alloy creates nanoporous structure, significantly enhancing the performance of alkaline hydrogen evolution reaction (HER) and showing excellent cycling performances. The nanoscale columnar structure formed on the surface of the corroded sample effectively inhibits the increase range of the polarization resistance of the alloy after 1000 CV cycles.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
Chunxia Niu, Hua Song, Yunzhen Chang, Wenjing Hou, Yanping Li, Yun Zhao, Yaoming Xiao, Gaoyi Han
Summary: Amorphous MoSx electrocatalysts have gained significant attention due to their structural flexibility and rich defects, providing abundant active sites for hydrogen evolution. In this study, amorphous MoSx films were electrochemically deposited on carbon cloth via constant potentials method in a deposition solution containing different amounts of (NH4)2MoS4 and NaOH. The resulting samples exhibited amorphous structure as confirmed by X-ray diffraction patterns, while X-ray photoelectron and Raman spectrum revealed the presence of defective MoV=O sites coordinated with bridged sulfur. The optimized MoSx electrode showed remarkable overpotentials for hydrogen evolution reaction (HER) in both acidic and alkaline electrolytes, surpassing the performance of most amorphous MoSx-based electrodes. The proposed catalytic pathway suggests the active role of MoV=O sites. This synthesis approach in alkaline electrolyte holds potential for the preparation of high-performance electrocatalysts for HER.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Fuzhen Zhao, Huicong Liu, Houyu Zhu, Xiaoyu Jiang, Liqun Zhu, Weiping Li, Haining Chen
Summary: A novel and simple strategy was developed to synthesize amorphous/amorphous Ni-P/Ni(OH)2 heterostructure nanotubes, which exhibit high catalytic activity and stability as HER catalyst, with significantly decreased energy barrier for hydrogen generation.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Liming Zeng, Tianxiang Yuan, Zerui Liu, Yongyang Zhu, Daifeng Wu, Dongxing Wang, Qing Zhou, Renheng Tang
Summary: In this study, a PtNi10/C alloy material with unique crystalline/amorphous structure supported on carbon black was deliberately designed and fabricated using a reversely rapid co-precipitation and mild thermal reduction strategy. The target catalyst exhibited low overpotential and fast kinetics rate for water dissociation, surpassing other catalysts and even commercial counterparts. The facile and rapid co-precipitation/thermal reduction strategy proposed in this study provides guidelines for designing high-efficiency alkaline HER catalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Pharmacology & Pharmacy
Bin Li, Yingyun Wang, Ying Feng, Dan Yuan, Renjie Xu, Cuiping Jiang, Xuecheng Xiao, Shan Lu
Summary: Co-amorphous supersaturated drug delivery systems are being explored as a method to improve the solubility of BCS II drugs. This study investigated the potential of using active metabolites as co-formers in drug-drug co-amorphous formulations, finding stable and enhanced dissolution properties in the co-amorphous system.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2022)
Article
Chemistry, Physical
Emily T. Nienhuis, Maxime Pouvreau, Trent R. Graham, Micah P. Prange, Katharine Page, John S. Loring, Andrew G. Stack, Aurora E. Clark, Gregory K. Schenter, Kevin M. Rosso, Carolyn I. Pearce, Hsiu-Wen Wang
Summary: The impact of ion speciation and local structure on the precipitation of aluminum hydroxide has been investigated in sodium aluminate solutions. The study reveals a mixture of monomeric and dimeric aluminate species, with the dimeric species increasing in solutions that avoid precipitation for extended periods of time. The conversion between these species is driven by hydrogen/deuterium bonding and proton/deuteron transfer reactions.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Yang Xu, Jun Cheng, Hongkun Lv, Liwei Ding, Kang Zhang, Annan Hu, Xian Yang
Summary: Designing efficient and stable non-precious metal catalysts with heterogeneous structures for electrolytic hydrogen evolution in alkaline media is a challenging topic. Cactus-like amorphous MoS2-CoFeLDO heterostructures derived from calcination of MoS2-CoFeLDH in argon markedly reduced overpotential of hydrogen evolution reaction (HER). The HER overpotential of MoS2-CoFeLDO@400 degrees C in 1 M KOH solution required only 36 mV to reach a current density of 10 mA/cm2 and remained highly active for & GE;24 h.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Medicine, Research & Experimental
Chailu Que, Alexandru Deac, Dmitry Y. Zemlyanov, QingQing Qi, Anura S. Indulkar, Yi Gao, Geoff G. Z. Zhang, Lynne S. Taylor
Summary: This study investigated the relationship between drug chemical structure and the limit of congruency (LoC) in PVPVA-based ASDs. Different types of drug-polymer interactions were found to impact the dissolution performance of ASDs, providing insights into the role of drug and polymer chemical structures on LoC and ASD performance in general.
MOLECULAR PHARMACEUTICS
(2021)
Article
Chemistry, Physical
Mengya Jin, Mingyue Teng, Shun Wang, Keqin Yang, Juan Wang, Huile Jin
Summary: A facile hydrothermal and heat treatment process was used to synthesize Pt-based nanocapsules, which exhibited excellent hydrogen evolution activity. The interface between crystalline Pt and amorphous TeOx as well as the strong electron transfer contributed to the alkaline hydrogen evolution activity. This work opens up a new direction for efficient catalyst preparation in electrocatalytic reactions or other conversion fields.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Hoyoung Kim, Hyanjoo Park, Dinh Son Tran, Soo-Kil Kim
Summary: Ni62Mo38 catalyst exhibits the highest HOR activity in 0.1 M KOH solution and shows improved performance after stability testing compared to previously reported non-precious HOR catalysts. This superior performance, attributed to structural properties and modified electronic structure, indicates its potential applicability to AEMFC.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Yu-qian Liu, Meng-hui Wang, Bing Yan, Lu Li, Sudip Pan, Zhong-hua Cui, Gernot Frenking
Summary: This study reports the quantum chemical calculations of the diatomic molecules AeB(-) and AeC (Ae=Ca, Sr, Ba). The results show that AeB(-) has an electronic triplet ((3)sigma(-)) ground state, while AeC has a lower-lying triplet state. The bonding in AeC is stronger compared to AeB(-).
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Materials Science, Paper & Wood
Kunfeng Jin, Guangjie Song, Huailing Diao, Xiaocheng Zhang, Xin Ji, Jinming Zhang, Jun Zhang
Summary: In this study, crystalline and amorphous cellulose from tunicate were prepared to investigate the non-conventional photoluminescence property. The results showed that CNC foam had the strongest fluorescence emission intensity and shortest phosphorescence lifetime, while CNC/PVA films had the lowest photoluminescence quantum yield and longest phosphorescence lifetime. Highly amorphous cellulose exhibited stronger phosphorescence emission intensity and longer lifetime compared to crystalline cellulose, attributed to the different hydrogen bonding networks and surface group motion on nanocrystals.
Article
Chemistry, Inorganic & Nuclear
Zi-Yu Fu, Hou-Ming Xu, Wan-Hong Li, Guan-Ping Jin, Shi-Kui Han
Summary: In this study, a series of Ru-based hybrid nanostructure (HN) materials with desired crystal phases were designed through phase engineering and chemical transformation. The t-Ru-RuS2 HN material exhibited the best overpotential and small Tafel slope, surpassing commercial Pt/C catalysts.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Songbo Chen, Dong Liu, Pengfei Zhou, Lulu Qiao, Keyu An, Yuling Zhuo, Jianxi Lu, Qizhen Liu, Weng Fai Ip, Zhenbo Wang, Hui Pan
Summary: Researchers demonstrated a novel multi-metal nanomaterial catalyst with high activity and stability, pointing towards broad applications in hydrogen generation technology.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Wenli Yu, Hongru Liu, Ying Zhao, Yunlei Fu, Weiping Xiao, Bin Dong, Zexing Wu, Yongming Chai, Lei Wang
Summary: In this study, corrosion-resistant bifunctional electrocatalysts with high activity and stability for seawater electrolysis were developed. PtOx-NiOn/NF electrodes were prepared by heat treatment of Ni ZIF-L nanosheets on nickel foam at low temperature. These electrodes exhibited excellent bifunctional activity with low overpotentials for both HER and OER reactions, surpassing previously developed electrocatalysts and commercial Pt/C and RuO2 electrodes. The PtOx-NiOn/NF two-electrode cell showed remarkable durability and stability in alkaline seawater. Under industrial conditions, a low cell voltage of 1.88 V was required for water-splitting at a high current density of 1000 mA/cm². This study provides a new approach in designing in-situ amorphous metal oxide bifunctional electrocatalysts with strong Pt-support interaction.
Article
Chemistry, Multidisciplinary
Marcel Maslyk, Zsolt Dallos, Martha Koziol, Sebastian Seiffert, Tim Hieke, Katharina Petrovio, Ute Kolb, Mihail Mondeshki, Wolfgang Tremel
Summary: This study presents a fast and sustainable method to produce bassanite, an important construction material, by solvent-assisted milling, which eliminates the need for energy-intensive dehydration. The resulting bassanite nanocrystals can be stabilized and applied in hybrid materials.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Marcel Maslyk, Tobias Gaeb, Galina Matveeva, Phil Opitz, Mihail Mondeshki, Yasar Krysiak, Ute Kolb, Wolfgang Tremel
Summary: The study demonstrates that CO2 emissions during clinker production of cement can be reduced by utilizing a metathesis reaction at room temperature in ball-mills. This method involves forming aNaSiCC, an amorphous intermediate, by mechanochemical activation of CaCO3 and Na2SiO3. It helps understand the interplay between thermodynamics and kinetics in complex reactions of alkali-activated binders and for CaCO3 crystallization in industrial and geochemical settings.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Sergii Shylin, Sergiu Shova, Helena J. Shepherd, Vadim Ksenofontov, Wolfgang Tremel, Il'ya A. Gural'skiy
Summary: We report on a molecular cationic iron(ii) complex with an incomplete spin crossover (SCO) behavior. The complex has an unusual disordered structure and a linear arrangement of ligand and water molecules, potentially accommodating up to four iron atoms. Through magnetic susceptibility measurements and Mossbauer spectroscopy, the thermal-induced SCO behavior of iron cations in the complex has been characterized.
DALTON TRANSACTIONS
(2022)
Article
Biochemistry & Molecular Biology
Ronald E. Unger, Sanja Stojanovic, Laura Besch, Said Alkildani, Romina Schroeder, Ole Jung, Caroline Bogram, Oliver Goerke, Stevo Najman, Wolfgang Tremel, Mike Barbeck
Summary: The study demonstrated that hydrogels containing nano-vaterite particles are biocompatible and beneficial for bone tissue regeneration. Tissue pathological and immunohistochemical detection showed the influence of hydrogels on macrophages, promoting tissue integration.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Eva Puetz, Athanasios Gazanis, Nils Gert Keltsch, Olga Jegel, Felix Pfitzner, Ralf Heermann, Thomas A. Ternes, Wolfgang Tremel
Summary: Bacterial biofilm formation is a significant problem and the discovery of anti-biofilm agents, such as CeO2 nanocrystals, that interfere with the bacterial cell-cell communication process known as quorum sensing (QS), shows promise. These nanocrystals were found to be effective in inhibiting QS signals through bromination reactions, preventing biofilm formation and controlling the expression of virulence genes. This non-toxic strategy could be a valuable approach for the development of anti-infectives.
Article
Chemistry, Multidisciplinary
Eva Puetz, Ina Tutzschky, Hajo Frerichs, Wolfgang Tremel
Summary: Designing catalyst particles at the nanometer scale can enhance their performance. Nanoceria, as a functional mimic of haloperoxidases, demonstrated the in situ generation of H2O2 and significantly enhanced catalytic activity through Bi3+ substitution.
Review
Chemistry, Multidisciplinary
Muhammad Ashraf, Nisar Ullah, Ibrahim Khan, Wolfgang Tremel, Shahzada Ahmad, Muhammad Nawaz Tahir
Summary: Renewable energy is crucial for environmental sustainability, and sunlight-driven fuel synthesis through water splitting is a sustainable and economical method. However, the water oxidation half-reaction in photocatalytic water splitting is challenging and requires designer photocatalysts. Photoreforming can address these challenges and convert waste plastics and biomass into valuable organic products for H2 production. This article provides an overview of photoreforming, including its mechanisms and the use of different polymer wastes as substrates for photocatalysts.
Article
Engineering, Environmental
N. G. Keltsch, E. Puetz, C. Dietrich, A. Wick, W. Tremel, T. A. Ternes
Summary: This study investigates the bromination behavior of three quorum sensing molecules with different molecule moieties and explores the mechanism and possible influence of vanadium bromoperoxidase and cerium dioxide nanocrystals on bacterial communication system. It is found that the halogenation of quorum sensing molecules can be catalyzed by haloperoxidase and cerium dioxide nanocrystals. The degradation behavior of different molecule moieties of quorum sensing molecules is elucidated, showing fast degradation and molecule-specific transformations.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Ashraf, Roshan Ali, Ibrahim Khan, Nisar Ullah, Muhammad Sohail Ahmad, Tetsuya Kida, Sanghyuk Wooh, Wolfgang Tremel, Udo Schwingenschlogl, Muhammad Nawaz Tahir
Summary: This study reports the use of highly reduced graphene oxide (HRG) to engineer the bandgap of melon, improving its performance in photocatalytic reactions. Experimental results show that the addition of HRG significantly increases the photocurrent density, and this is validated by theoretical calculations.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Rene Doeren, Martin Panthoefer, Leon Praedel, Wolfgang Tremel, Mihail Mondeshki
Summary: Mixed-valence tungsten bronzes with adaptive structural and compositional features have attracted significant attention in thermoelectrics, electrochromics, catalysis, and battery electrodes. This study focuses on the characterization of Li+ cations using NMR experiments and provides insights into their spatial connectivity and chemical exchange properties.
Article
Chemistry, Multidisciplinary
Eva Puetz, Glen J. Smales, Olga Jegel, Franziska Emmerling, Wolfgang Tremel
Summary: Designing the shape and size of catalyst particles, as well as their interfacial charge, at the nanometer scale can significantly alter their performance. By studying ceria nanoparticles, researchers have found that the chemical activity of the nanoparticles is influenced by their active surface area, surface charge, and surface defects. The surface properties of the particles can be selectively controlled by adjusting the synthesis time, allowing for the tailored preparation of nanocatalysts according to specific needs.
Article
Chemistry, Inorganic & Nuclear
Do-Hyun Quak, Massih Sarif, Phil Opitz, Martin Lange, Olga Jegel, Dang Hieu Pham, Martha Koziol, Leon Praedel, Mihail Mondeshki, Muhammad Nawaz Tahir, Wolfgang Tremel
Summary: In this study, NaCrO2 particles for high-rate sodium ion batteries were prepared using microfluidic processing. The reaction time was significantly reduced compared to conventional synthesis methods, allowing for large-scale production of cathode materials with superior properties.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Marcel Maslyk, Mihail Mondeshki, Wolfgang Tremel
Summary: Amorphous calcium carbonate (ACC) is a precursor in the biomineralization of crystalline CaCO3, and its lifetime is regulated by biomacromolecules. We developed a method to prepare monohydrate-like ACC (aCCM) using ethanol as auxiliary solvent. The amorphization reaction was analyzed using various scattering methods and spectroscopies coupled with thermal analysis. The study showed that by temporarily replacing structural water with ethanol, the metastable aCCM could be stabilized, and the absence of hydrogen bonding in the hydrate network was crucial in the process.
Article
Chemistry, Multidisciplinary
Phil Opitz, Olga Jegel, Jamal Nasir, Tobias Rios-Studer, Athanasios Gazanis, Dang-Hieu Pham, Katrin Domke, Ralf Heermann, Joern Schmedt auf der Guenne, Wolfgang Tremel
Summary: Marine organisms combat bacterial colonization by biohalogenation of signaling compounds. Nanoceria can emulate the activity of haloperoxidase enzymes. Lanthanide substitution greatly enhances the haloperoxidase-like activity of nanoceria. This method offers an efficient antifouling application without the need for additional chemicals.
