Results 31 to 40 of about 297,971 (289)
Pd/SAPO-34 passive NO x adsorbers: Stable Pd ion adsorption sites in six-member rings
Materials Research Express, 2021 Pd/zeolites with chabazite (CHA) topology are effective passive NO _x adsorbers (PNAs), which are promising for the removal of NO _x from diesel exhausts during cold start to meet increasingly stringent emission regulations.
Nana Zhang +7 more
doaj +1 more source
Fluorine abundances in planetary nebulae
, 2005 We have determined fluorine abundances from the F II 4789 and F IV 4060 nebular emission lines for a sample of planetary nebulae (PNe). Our results show that fluorine is generally overabundant in PNe, thus providing new evidence for the synthesis of ...
Butler K. +6 more
core +1 more source
Discovery of Interstellar Hydrogen Fluoride [PDF]
, 1997 We report the first detection of interstellar hydrogen fluoride. Using the Long Wavelength Spectrometer (LWS) of the Infrared Space Observatory (ISO), we have detected the 121.6973 micron J = 2 - 1 line of HF in absorption toward the far-infrared ...
Atkinson R. +13 more
core +3 more sources
, 2009 Polycrystalline samples of RO1-xFxFeAs (0 < x < 0.25) (R = La, Sm, Gd) were investigated by wavelength-dispersive X-ray spectroscopy (WDX) in the electron microscope to determine the composition of the samples, in particular the fluorine content.
Anke Köhler +5 more
core +1 more source
Advanced Engineering Materials, EarlyView.Hydrostatic bearings excel in high‐precision applications, but their performance hinges on a continuous external supply. This study evaluates various material combinations for sliding surfaces to mitigate damage during supply failures or misalignment and to discover the most effective materials identified for enhancing the reliability and efficiency of
Michal Michalec +6 more
wiley +1 more source
Nature CommunicationsPlasma-electrochemical tandem conversion with NOx − as intermediates promises a route for renewable ammonia (NH3) synthesis from air and water. However, a critical challenge lies in developing electrolyzers capable of operating efficiently at large ...
Wei Liu +10 more
doaj +1 more source
FirePhysChem, 2021 The introduction of highly oxidative explosophoric groups is an efficient strategy to enhance the detonation properties of energetic materials due to its improvement effect of oxygen balances. Chlorodinitromethyl and fluorodinitromethyl groups are widely
Junlin Zhang +5 more
doaj +1 more source
A Different Perspective on the Solid Lubrication Performance of Black Phosphorous: Friend or Foe?
Advanced Engineering Materials, EarlyView.Researchers investigate black phosphorous (BP) as a standalone solid lubricant coating through ball‐on‐disc linear‐reciprocating sliding experiments in dry conditions. Testing on different metals shows BP doesn't universally reduce friction and wear. However, it achieves 33% friction reduction on rougher iron surfaces and 23% wear reduction on aluminum.
Matteo Vezzelli +5 more
wiley +1 more source
Nanomaterials, 2023 Exploring non-precious metal-based catalysts for oxygen reduction reactions (ORR) as a substitute for precious metal catalysts has attracted great attention in recent times.
Jun Dong +6 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.This review explores wafer bonding technologies, covering wafer preparation, activation methods, and bonding mechanisms. It compares direct and indirect bonding, highlights recent advancements and future trends, and examines applications in 3D integration and packaging.
Abdul Ahad Khan +5 more
wiley +1 more source