Improving water splitting efficiency has been the holy grail of hydrogen fuel production. Major efforts have been invested in an attempt to enhance efficiency of a common water oxidation catalyst, α-Fe2O3, through doping and alloying. Recent experiments show that higher efficiency is achieved when niobium (Nb) is added beyond the solubility limit to generate a mixture of two phases: Nb-doped an...

In comparison to the previous researches, ZrO2 nanoparticles with higher surface area (85 m2/g) have been synthesized in this research. The as-prepared ZrO2 nanoparticles by co-precipitation method were characterized with X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The surface area of the s...

This work presents the nanoindentation and XPS results of a newly-developed biomaterial of titanium TNZ alloy after different surface treatments. The investigations were performed on the samples AR (as received), EP (after a standard electropolishing) and MEP (after magnetoelectropolishing). The electropolishing processes, both EP and MEP, were conducted in the same proprietary electrolyte base...

After a very active period of Niobium Titanium superconductor strand development in the mid 1980s, progress slowed as the SSC scaled up for production and emphasis moved towards guaranteeing, rather than enhancing performance. However, this period also produced several advances in the understanding of flux pinning in Niobium Titanium alloys and in the fabrication of composites containing artifi...

Niobium-added titanium oxide is a promising candidate as substitute carbon support for cathodes of PEFCs. Nb-added TiO2 can act platinum nanoparticles to enhance the oxygen reduction reaction (ORR) activity and durability under acidic conditions. supports with desired surface area (10–130 m2 g−1) conductivity (10−7–10−2 S cm−1) were prepared by changing amount Nb heat treatment First, we conduc...

Niobium superconductive radio frequency cavities (SRF cavities) are commonly employed in linear accelerator; very pure, clean, and smooth internal walls required to make the cavity working properly with a high Q factor. Typically, achieve suitable surface quality SRF subjected treatment called Buffered Chemical Polish (BCP), latter uses strong concentrated acids mixture flowing through chemical...

We calculate the electronic structure of 3d impurities in niobium and molybdenum. Our calculations rely on the local density approximation of density functional theory. Assuming a muffin-tin description of the atomic potentials, the impurity potential and the ones of the nearest neighbours are calculated self-consistently while the embedding of this perturbed cluster into the host is described ...