Tailored copper nanoparticles in ordered mesoporous KIT-6 silica: Preparation and application as catalysts in integrated system for NO removal with products of methanol decomposition

Authors: Tanya Tsoncheva, Alessandro Gallo, Ivanka Spassova, Momtchil Dimitrov, Izabella Genova, Marcello Marelli, Mariana Khristova, Genoveva Atanasova, Daniela Kovacheva, Vladimiro Dal Santo

Abstract:
Firsttime a combined wetimpregnation (WI)-organometallics chemical vapor deposition (OMCVD) strategy was applied for loading of 3–7 wt.% copper in mesoporous silica KIT-6 matrix nanoparticles with tailored particle size. XRD, HRTEM, nitrogen physisorption, UV–vis, XPS and temperature programmed reduction with hydrogen were used for the samples characterization and comparison with the similar materials obtained by conventional impregnation technique. The catalytic behaviour of all samples was tested in number of ecological reactions, such as methanol decomposition, selective catalytic reduction (SCR) of NO by CO and, for the first time, in SCR of NO with a mixture of CO and CH4. The catalyst composition was optimized in a view of its potential application in an integrated catalytic system for the NO removal by SCR with the products of methanol decomposition. The step-wise WI-OMCVD technique is appropriate for the preparation of uniform and finely dispersed copper nanoparticles inside the mesoporous of KIT-6 silica matrix. The growth of copper particles and their catalytic behaviour is strongly controlled by the porous structure of the support.

Keywords:
OMCVD technique
Copper nanoparticles supported on KIT-6
Methanol decomposition
SCR of NO with CO
SCR of NO with CO and CH₄

Published in: Applied catalysis A: General  (Volumes 464–465, Pages 1-384, 15 August 2013)

Publisher: Elsevier  

ISSN Information: 0926-860X

Tailored copper nanoparticles in ordered mesoporous KIT-6 silica: Preparation and application as catalysts in integrated system for NO removal with products of methanol decomposition

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