One-Step Vapor-Phase Synthesis and Quantum-Confined Exciton in Single-Crystal Platelets of Hybrid Halide Perovskites

In this article the synthesis, characterization and catalytic activity studies of zirconia based base catalysts such as Mg(II)/ZrO2, Ca(II)/ZrO2 and Ba(II)/ZrO2 coated on honeycomb monoliths is reported. Honeycomb monoliths were coated with Mg(II)/ZrO2, Ca(II)/ZrO2, Ba(II)/ZrO2 and characterized for their physico-chemical properties such as surface basicity, crystallinity and morphology by using relevant techniques. The catalytic activity of these catalytic materials was evaluated in vapor phase synthesis of glycerol carbonate. The reaction conditions were optimized by varying reaction parameters such as nature of catalytic material, molar ratio of the reactants, catalyst bed temperature, feed-rate of the reactants and time-on-stream to obtain highest possible yield of glycerol carbonate with greater selectivity. The catalytic materials were found to be highly efficient in the synthesis of glycerol carbonate with a possible highest yield up to ~98%. These catalytic materials can be easily reactivated and reused in this reaction.Bangladesh J. Sci. Ind. Res.53(1), 21-28, 2018

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Tuning Pt-CeO2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen

Nature Communications ◽

10.1038/s41467-019-09308-5 ◽

2019 ◽

Vol 10 (1) ◽

Cited By ~ 64

Author(s):

Xavier Isidro Pereira-Hernández ◽

Andrew DeLaRiva ◽

Valery Muravev ◽

Deepak Kunwar ◽

Haifeng Xiong ◽

...

Keyword(s):

High Temperature ◽

Co Oxidation ◽

Vapor Phase ◽

Ambient Pressure ◽

Lattice Oxygen ◽

Single Atom ◽

Stable Form ◽

Phase Synthesis ◽

Vapor Phase Synthesis ◽

High Temperature Vapor

Abstract In this work, we compare the CO oxidation performance of Pt single atom catalysts (SACs) prepared via two methods: (1) conventional wet chemical synthesis (strong electrostatic adsorption–SEA) with calcination at 350 °C in air; and (2) high temperature vapor phase synthesis (atom trapping–AT) with calcination in air at 800 °C leading to ionic Pt being trapped on the CeO2 in a thermally stable form. As-synthesized, both SACs are inactive for low temperature (<150 °C) CO oxidation. After treatment in CO at 275 °C, both catalysts show enhanced reactivity. Despite similar Pt metal particle size, the AT catalyst is significantly more active, with onset of CO oxidation near room temperature. A combination of near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) and CO temperature-programmed reduction (CO-TPR) shows that the high reactivity at low temperatures can be related to the improved reducibility of lattice oxygen on the CeO2 support.

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Vapor phase synthesis of fine particles

IEEE Transactions on Plasma Science ◽

10.1109/27.649619 ◽

1997 ◽

Vol 25 (5) ◽

pp. 1008-1016 ◽

Cited By ~ 23

Author(s):

A.C. Da Cruz ◽

R.J. Munz

Keyword(s):

Vapor Phase ◽

Fine Particles ◽

Phase Synthesis ◽

Vapor Phase Synthesis

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