Article
Biochemistry & Molecular Biology
Leon R. S. Rosseau, Jose A. Medrano, Rajat Bhardwaj, Earl L. V. Goetheer, Ivo A. W. Filot, Fausto Gallucci, Martin van Sint Annaland
Summary: The concept of liquid metal membranes as an alternative to palladium-based membranes for hydrogen separation has potential, but the low adsorption energy of hydrogen on liquid metals suggests other factors may be relevant. Microkinetic modeling shows that the flux of liquid metal membranes is limited by dissociative adsorption, resulting in significantly lower flux compared to pure palladium membranes.
Article
Chemistry, Multidisciplinary
Tiago Pomella Lobo, Ester Diaz-Alvarez, Laetitia Frances
Summary: Liquid lead-lithium is a potential material for breeding blankets in future fusion power plants. However, there is a large scattering of measurements for the diffusivity and solubility of tritium in this alloy. To address this issue, researchers developed a model to simulate the dissolution and diffusion of gases in metallic barriers. This model can be used to estimate these coefficients and plan for future experiments.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Ying Zhang, Jianing Gui, Dan Wang, Junjun Mao, Chenchen Zhang, Fengwang Li
Summary: In this study, a tandem catalyst PDI-Cu/Cu with atomically isolated Cu-N sites and Cu clusters was synthesized, which showed more than 2 times the enhancement in C2H4 production compared with the non-tandem catalyst PDI/Cu. Density functional theory (DFT) calculations supported the tandem reaction mechanism, where Cu-N sites first reduced CO2 into highly concentrated CO and then CO migrated to the surfaces of Cu clusters for further conversion into C2H4, decoupling the complex C2H4 generation pathway at single active sites into a two-step tandem reaction. This work offers a rational approach to design electrocatalysts for boosting the selectivity of the CO2RR to C2+ products via a tandem route.
Article
Chemistry, Physical
Hongxing Zhu, Honghui Cheng, Donglei Chen, Zhi Ding
Summary: A compact volumetric apparatus has been developed for measuring hydrogen storage materials. It can provide various tests under different pressure and temperature conditions, and employs novel methods to improve testing efficiency and accuracy.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Environmental Sciences
Brendan T. Higgins, Kristin Chaump, Qichen Wang, Rishi Prasad, Poulomi Dey
Summary: The study investigated the effects of moisture content and active aeration on soluble mineral forms of nitrogen and phosphorus in poultry litter. Higher moisture content led to increased phosphorus solubility but lower nitrification levels. Therefore, lower moisture levels are better for field application to maintain stable phosphate levels, while higher moisture levels may be suitable for low-cost phosphate recovery processes.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Geochemistry & Geophysics
Fabien Bernadou, Fabrice Gaillard, Evelyn Furi, Yves Marrocchi, Aneta Slodczyk
Summary: The study conducted experiments on basalt samples to analyze the nitrogen concentration and C-O-H species distribution in silicate melts, developing a solubility law for nitrogen in basalts and expanding upon existing models. This model can be used to investigate nitrogen degassing processes in planetary accretion and modern volcanism under various pressure, temperature, and fO2 conditions.
Article
Chemistry, Physical
E. MacA Gray, C. J. Webb
Summary: The pressure-composition isotherm is the most important measurement for a new hydrogen storage material, which captures the storage conditions and the amount of hydrogen stored. The Sieverts technique is the most popular experimental approach for constructing such isotherms, where the amount of hydrogen absorbed or desorbed by the sample can be inferred from measurements of the hydrogen pressure. This study discusses the factors contributing to good performance and presents a Figure of Merit for evaluating the apparatus performance in combination with the sample.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Guoqiang Cao, N. Aaron Deskins, Nan Yi
Summary: The study demonstrates that nitrogen-doped titanium dioxide can enhance the catalytic performance of copper-titanium dioxide catalysts, especially in the carbon monoxide oxidation reaction. The different nitrogen modifications on rutile and anatase titanium dioxide phases lead to diverse reaction outcomes.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Thermodynamics
Tomoya Tsuji, Abdul Aleem Seeni Mohamed, Andrea Jia Xin Lai, Lian See Tan, Hiroaki Matsukawa, Taka-aki Hoshina, Katsuto Otake
Summary: This study measured the solubilities of nitrogen and oxygen in two vinyl monomers, a cross-linker, and three esters. The experimental data were compared with those of methyl methacrylate (MMA) and correlated well with the Peng-Robinson equation of state. The functional groups were found to be the main factor controlling the solubilities of nitrogen and oxygen.
FLUID PHASE EQUILIBRIA
(2024)
Article
Polymer Science
Martina Klucakova
Summary: Agarose hydrogels enriched by chitosan were studied for their diffusion properties and the immobilization of copper ions. The addition of chitosan increased the effective diffusion coefficients, but a lower addition resulted in decreased diffusivity compared to hydrogel without chitosan. Liesegang patterns were observed in the hydrogels with higher chitosan content, causing a local decrease in copper ion concentration and affecting concentration profiles.
Article
Nanoscience & Nanotechnology
Ghenwa Zaher, Xavier Sauvage, Samuel Jouen
Summary: The design of electrical contacts with both high electrical conductivity and excellent wear resistance can be achieved by surface hardening through nitrogen implantation. Electron microscopy was used to investigate the underlying mechanisms. The study found that the larger lattice parameter of CuSn does not promote nitrogen implantation, but the high density of crystalline defects in the severely deformed material leads to a thicker implanted layer. The strong hardening is attributed to the high density of nanoscaled Cu3N particles.
SCRIPTA MATERIALIA
(2023)
Article
Engineering, Electrical & Electronic
Chao Qi, Jiamin Zhang, Mengnan Ma, Xingping Zhou
Summary: In this study, yellow-emitting fluorescent carbon dots (Y-CDs) were prepared using o-Phenylenediamine and taurine via a hydrothermal method. The Y-CDs demonstrated good water phase stability and were able to selectively detect Cu2+ and phenylalanine. These Y-CDs have potential applications in environmental protection and human health.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Shuai Zhang, Yunxuan Zhao, Run Shi, Chao Zhou, Geoffrey I. N. Waterhouse, Zhuan Wang, Yuxiang Weng, Tierui Zhang
Summary: This study reports the successful synthesis of uniformly sized and ultrafine Cu2O platelets, which exhibit excellent performance and stability for the visible light driven photocatalytic reduction of N-2 to NH3. The high activity is attributed to long-lived photoexcited electrons in trap states, an abundance of exposed active sites, and the underlying support structure.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Quentin Dherbassy, Srimanta Manna, Chunling Shi, Watcharapon Prasitwatcharakorn, Giacomo E. M. Crisenza, Gregory J. P. Perry, David J. Procter
Summary: In this study, an enantioselective copper-catalyzed borylative cyclization was reported for the assembly of privileged pyrroloquinazolinone motifs. The reaction demonstrated high enantio- and diastereocontrol, yielding products with quaternary stereocenters. The utility of the products was further demonstrated through additional manipulations.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Wahyu Prasetyo Utomo, Hao Wu, Yun Hau Ng
Summary: In this study, the performance of electrocatalytic nitrogen reduction reaction (NRR) is enhanced by loading copper nanoparticles on oxygen-deficient TiO2. Compared to pristine TiO2, the modified catalyst exhibits higher ammonia yield of 13.6 mu g mg(cat)(-1) h(-1) at -0.5 V versus reversible hydrogen electrode (RHE) and Faradaic efficiency of 17.9% at -0.4 V versus RHE. The enhanced performance is attributed to the increased electrochemically active surface area, promoted electron transfer, and strong metal-support interaction (SMSI) between Cu nanoparticles and oxygen-deficient TiO2.
