Journal ArticleDOI
Acidity of heteropoly compounds from XPS measurements
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In this paper, the changes in the partial charges on oxygens in the various heteropoly salts as a result of the acidity differences have been exploited for probing the oxygen 1s and W 4f lines.Abstract:
The changes in the partial charges on oxygens in the various heteropoly salts as a result of the acidity differences have been exploited for probing the oxygen 1s and W 4f lines. The gradation of the acidity thus obtained is compared to that of the conventional method.read more
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Book ChapterDOI
Catalytic Chemistry of Heteropoly Compounds
TL;DR: The catalytic properties of heteropoly compounds have drawn wide attention, owing to the versatility of these compounds as catalysts, which has been demonstrated both by success in large-scale applications and by promising laboratory results as mentioned in this paper.
Journal ArticleDOI
Coking and regeneration of H3PW12O40/SiO2 catalysts
TL;DR: In this paper, the authors investigated the effect of palladium-doped catalysts on the coke formation in a silica-supported heteropoly acid (HPA) H3PW12O40 (PW) and showed that the Keggin structure of the catalysts was unaffected by coke deposition in both undoped and Pddoped PW/SiO2.
Journal ArticleDOI
Core-Shell Vanadium Oxide-Carbon Nanoparticles: Synthesis, Characterization, and Luminescence Properties
TL;DR: In this article, a single step, solvent-, catalyst-, and template-free synthesis process to prepare core−shell vanadium oxide−carbon nanoparticles from the dissociation of a single vanadium(V) oxytriethoxide precursor is demonstrated.
Journal ArticleDOI
Alkylation of toluene with methanol on microporous MxH3−XPW12O40 [M=K+, Cs+, NH4 + and Tl+]
TL;DR: In this article, a linear correlation was observed between protein selectivity and number of strong acid sites with strength of H 0≤−5.6.p-Xylene selectivity was evaluated as a function of x.
References
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Journal ArticleDOI
Methanol conversion over metal salts of 12-tungstophosphoric acid
Hiromu Hayashi,John B. Moffat +1 more
TL;DR: In this article, the sodium, boron, calcium, magnesium, zinc, aluminum, and zirconium salts of 12-tungstophosphoric acid have been prepared and characterized using X-ray diffraction, mercury porosimetry, the chemisorption of ammonia, and Hammett indicators.
Journal ArticleDOI
Acidity of heteropoly compounds
Ashim K. Ghosh,John B. Moffat +1 more
TL;DR: The acidity of 12-tungstophosphoric acid (HPW) and its salts of Na, Ca, Mg, Zn, Al, and Zr under different pretreatment conditions was determined by using an indicator method as discussed by the authors.
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