70 research outputs found
Two dimensional LiMgAs; a novel Topological Quantum Catalyst for Hydrogen Evolution Reaction
Quantum materials such as Topological Insulators (TI) have been promising due
to diverse applications of their robust surface/edge states in the bulk (3D)
and two-dimensional (2D) regime. Such conducting surface states in 3D systems,
host "\textit{electron bath}" which are known to facilitate catalysis. However,
the analogous effects in 2D scenarios wherein, conducting helical edge states
giving rise to Fermionic accumulation has been scarcely addressed. Using
density functional theory based \textit{first-principles} calculations, we
demonstrate that, the conducting edge states in 2D TI such as LiMgAs can be
exploited to facilitate excellent catalytic response towards Hydrogen evolution
reactions. The Gibbs free energy in such cases was found to be as low as
0.02 eV which is quite superior as compared to other materials reported in
literature. The concept presented herein can be extended to other well known 2D
TI and used to realise novel topological quantum catalysts for ultra-high
performance and efficient catalytic applications.Comment: 5 pages, 4 figure
其一
Here we present a formal description of Biremis panamae Barka, Witkowski et Weisenborn sp. nov., which was isolated from the marine littoral environment of the Pacific Ocean coast of Panama. The description is based on morphology (light and electron microscopy) and the rbcL, psbC and SSU sequences of one clone of this species. The new species is included in Biremis due to its morphological features; i.e. two marginal rows of foramina, chambered striae, and girdle composed of numerous punctate copulae. The new species also possesses a striated valve face which is not seen in most known representatives of marine littoral Biremis species. In this study we also present the relationship of Biremis to other taxa using morphology, DNA sequence data and observations of auxosporulation. Our results based on these three sources point to an evolutionary relationship between Biremis, Neidium and Scoliopleura. The unusual silicified incunabular caps present in them are known otherwise only in Muelleria, which is probably related to the Neidiaceae and Scoliotropidaceae. We also discuss the relationship between Biremis and the recently described Labellicula and Olifantiella
The Microstructure Degradation of the IN 713C Nickel-Based Superalloy After the Stress Rupture Tests
The Effect of Concentration on Lubricating Properties of Aqueous Solutions of Sodium Lauryl Sulfate and Ethoxylated Sodium Lauryl Sulfate
Generalized Stacking Fault Energies of Aluminum Alloys–Density Functional Theory Calculations
Generalized stacking fault energies of aluminum alloys were calculated using density functional theory. Stacking fault energy of aluminum alloys was correlated with the d-electrons number of transition metal alloying elements. The tendency to twinning is also modified by the presence of the alloying element in the deformation plane. Our results suggest that Al alloys, with such elements as Zr, Nb, Y, Mo, Ta, and Hf, are expected to exhibit a strong work hardening rate due to emission of the partial dislocations
The Effect of Concentration on Lubricating Properties of Aqueous Solutions of Sodium Lauryl Sulfate and Ethoxylated Sodium Lauryl Sulfate
Application of dynamic impedance spectroscopy to atomic force microscopy
Atomic force microscopy (AFM) is a universal imaging technique, while impedance spectroscopy is a fundamental method of determining the electrical properties of materials. It is useful to combine those techniques to obtain the spatial distribution of an impedance vector. This paper proposes a new combining approach utilizing multifrequency scanning and simultaneous AFM scanning of an investigated surface
Influence of Temperature and Pressure on the Possibility of Obtaining Al2O3/Ni-P Nanocomposite through Hot Pressing Process
score: 0collation: 147-15
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