Results 41 to 50 of about 409,435 (303)

Improvement of Hydrogen Desorption Characteristics of MgH2 With Core-shell Ni@C Composites

open access: yesMolecules, 2018
Magnesium hydride (MgH2) has become popular to study in hydrogen storage materials research due to its high theoretical capacity and low cost. However, the high hydrogen desorption temperature and enthalpy as well as the depressed kinetics, have severely
Cuihua An, Qibo Deng
doaj   +1 more source

Synthesis and Application of Porous Carbon Nanomaterials from Pomelo Peels: A Review

open access: yesMolecules, 2023
Advanced carbon nanomaterials have been widely applied in various fields such as microelectronics, energy storage, catalysis, adsorption, biomedical engineering, and material strengthening. With the increasing demand for porous carbon nanomaterials, many
Zixuan Liu   +6 more
doaj   +1 more source

Complex Organic Materials in the HR 4796A Disk? [PDF]

open access: yes, 2008
The red spectral shape of the visible to near infrared reflectance spectrum of the sharply-edged ring-like disk around the young main sequence star HR 4796A was recently interpreted as the presence of tholin-like complex organic materials which are seen ...
Aigen Li   +26 more
core   +2 more sources

Destruction of Refractory Carbon in Protoplanetary Disks [PDF]

open access: yes, 2017
The Earth and other rocky bodies in the inner solar system contain significantly less carbon than the primordial materials that seeded their formation. These carbon-poor objects include the parent bodies of primitive meteorites, suggesting that at least ...
Anderson, Dana E.   +5 more
core   +3 more sources

Complex Pt/Al2O3 materials for small catalytic systems [PDF]

open access: yes, 2007
This paper reports on the preparation of catalytic materials composed of a porous metallic preform containing winding microchannels whose surface is coated by a complex catalytic film. Al2O3 is deposited inside the pores by means of wet impregnation in a
Alphonse, Pierre   +4 more
core   +3 more sources

Monitoring the length change of Ni@C composite electrodes during charging/discharging processes

open access: yesElectrochemistry Communications, 2019
The iterative volume change of electrode materials during electrochemical charging/discharging processes could generally result in the performance degradation of electrochemical capacitors. This work investigates the mechanical stability of the electrode
Cuihua An   +3 more
doaj   +1 more source

Flow conveying and diagnosis with carbon nanotube arrays [PDF]

open access: yes, 2006
Dense arrays of aligned carbon nanotubes are designed into strips, nanowicks, as a miniature wicking element for liquid delivery and potential microfluidic chemical analysis devices. Liquid wicks away along the nanowicks spontaneously.
Gharib, Morteza   +2 more
core   +1 more source

Self-powered H2 production with bifunctional hydrazine as sole consumable

open access: yesNature Communications, 2018
While water electrolysis provides an attractive means to produce high-energy hydrogen (H2), the process imposes significant material overpotential barriers.
Xijun Liu   +8 more
doaj   +1 more source

Effects of carbon nanotubes/graphene nanoplatelets hybrid systems on the structure and properties of polyetherimide-based foams [PDF]

open access: yes, 2018
Foams based on polyetherimide (PEI) with carbon nanotubes (CNT) and PEI with graphene nanoplatelets (GnP) combined with CNT were prepared by water vapor induced phase separation. Prior to foaming, variable amounts of only CNT(0.1–2.0wt%) or a combination
Abbasi, Hooman   +2 more
core   +3 more sources

Low‐Cost, Large‐Scale Nanoporous Metals by Mechanical Alloying, Oxide Reduction, and Dealloying of Powders

open access: yesAdvanced Engineering Materials, EarlyView.
Powder metal processing provides scalable advantages in nanoporous (np) metal development. Mechanical alloying is used to produce unique precursors for hybrid nanopore formation by oxide reduction and dealloying. As demonstrated in np Ag, this approach improves process efficiency while promoting smaller ligaments and larger pores, both of which are ...
Mark A. Atwater, Oliver A. Fowler
wiley   +1 more source

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