Topic
Tungsten
About: Tungsten is a research topic. Over the lifetime, 35225 publications have been published within this topic receiving 456213 citations. The topic is also known as: W & element 74.
Papers published on a yearly basis
Papers
More filters
TL;DR: A tungsten phosphide, WP, hydrotreating catalyst was prepared by temperature-programmed reduction of an X-ray amorphous Tungsten phosphate at a heating rate of 0.0167 K s−1 and a 2-h soak at the final temperature of 938 K.
135 citations
TL;DR: In this paper, the field electron emission properties of boron and nitrogen doped carbon nanotubes (CNTs) grown in situ on tungsten (W) tips and silicon substrates have been studied.
134 citations
134 citations
TL;DR: In this article, the esterification of palmitic acid with methanol was studied on zirconia supported tungsten oxide solid acid catalysts prepared by both impregnation and co-precipitation methods.
Abstract: Esterification of palmitic acid with methanol was studied on zirconia supported tungsten oxide solid acid catalysts prepared by both impregnation and co-precipitation methods; the tungsten loading and calcination temperature were varied. These catalysts were characterized by X-ray diffraction for structural elucidation and by temperature-programmed desorption of ammonia for their surface acidity. Whereas the impregnated catalysts exhibited both tetragonal and monoclinic phases of zirconia, at calcination temperatures beyond 500 °C their co-precipitated analogues showed stability towards the tetragonal phase. The formation of monoclinic phases of zirconia and crystalline tungsten oxide decreased the esterification activity, as a consequence of decreased surface acidity. Coexistence of tetragonal zirconia with the amorphous tungsten oxide offered maximum esterification activity.
134 citations
TL;DR: In this article, the large-scale nanowire-like (NW) structure of tungsten oxide is synthesized by the deposition of Tungsten metal on the substrate of porous single-wall carbon nanotubes (SWCNTs) film, followed by thermal oxidation process.
134 citations