Zeolite MCM-22 modified with Au and Cu for catalytic total oxidation of methanol and carbon monoxide

2013
journal article
article
42
dc.abstract.enThe goal of this work was to use MCM-22 zeolites for preparation of monometallic (Cu or Au) and bimetallic (Cu and Au) catalysts for oxidation reactions. The focus was on precise determination of the nature of gold and copper species and their activity in the oxidation processes. For that purpose several characterization techniques were applied (XRD, $N_{2}$ adsorption/desorption, TEM, SEM, UV − vis, $H_{2}$-TPR, $^{27}\textrm{Al}$ MAS NMR, FT-IR with the adsorption of pyridine, NO, and CO, ESR spectroscopy). They allowed us to de fi ne the following species formed on MCM-22 surface: metallic gold particles (XRD, UV − vis), isolated $Cu^{2+}$ with octahedral coordination (UV − vis, ESR), square planar $Cu^{2+}$ cations (ESR, IR), $Cu^{+}$ species (ESR+NO, FTIR+CO, and FTIR+NO), and oligonuclear clusters (UV − vis) as well as CuO-like species ($H_{2}$ -TPR). The presence of gold on the MCM-22 surface modified further by copper species caused the interaction between two modifiers leading to much easier reduction of CuO-like species and higher mobility of oxygen-promoting oxidative properties. The bimetallic catalyst was highly active in total oxidation of methanol and CO in the temperature range 523 − 623 K. Cu/Au-MCM-22 zeolite appeared useful for simultaneous removal of CO and methanol (by total oxidation) from gases emitted from automotive devices and during a variety of industrial process operations.pl
dc.affiliationWydział Chemii : Zakład Chemii Nieorganicznejpl
dc.contributor.authorSobczak, Izabelapl
dc.contributor.authorDecyk, Piotrpl
dc.contributor.authorZiółek, Mariapl
dc.contributor.authorRoth, Wiesław - 228241 pl
dc.contributor.authorCampo, Betianapl
dc.contributor.authorDaturi, Marcopl
dc.contributor.authorKamiński, Piotrpl
dc.date.accessioned2015-06-19T08:56:52Z
dc.date.available2015-06-19T08:56:52Z
dc.date.issued2013pl
dc.description.number5pl
dc.description.physical2147-2159pl
dc.description.volume117pl
dc.identifier.doi10.1021/jp310505ypl
dc.identifier.eissn1932-7455pl
dc.identifier.issn1932-7447pl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/9893
dc.languageengpl
dc.language.containerengpl
dc.rights.licenceBez licencji otwartego dostępu
dc.subtypeArticlepl
dc.titleZeolite MCM-22 modified with Au and Cu for catalytic total oxidation of methanol and carbon monoxidepl
dc.title.journalThe Journal of Physical Chemistry. Cpl
dc.typeJournalArticlepl
dspace.entity.typePublication
dc.abstract.enpl
The goal of this work was to use MCM-22 zeolites for preparation of monometallic (Cu or Au) and bimetallic (Cu and Au) catalysts for oxidation reactions. The focus was on precise determination of the nature of gold and copper species and their activity in the oxidation processes. For that purpose several characterization techniques were applied (XRD, $N_{2}$ adsorption/desorption, TEM, SEM, UV − vis, $H_{2}$-TPR, $^{27}\textrm{Al}$ MAS NMR, FT-IR with the adsorption of pyridine, NO, and CO, ESR spectroscopy). They allowed us to de fi ne the following species formed on MCM-22 surface: metallic gold particles (XRD, UV − vis), isolated $Cu^{2+}$ with octahedral coordination (UV − vis, ESR), square planar $Cu^{2+}$ cations (ESR, IR), $Cu^{+}$ species (ESR+NO, FTIR+CO, and FTIR+NO), and oligonuclear clusters (UV − vis) as well as CuO-like species ($H_{2}$ -TPR). The presence of gold on the MCM-22 surface modified further by copper species caused the interaction between two modifiers leading to much easier reduction of CuO-like species and higher mobility of oxygen-promoting oxidative properties. The bimetallic catalyst was highly active in total oxidation of methanol and CO in the temperature range 523 − 623 K. Cu/Au-MCM-22 zeolite appeared useful for simultaneous removal of CO and methanol (by total oxidation) from gases emitted from automotive devices and during a variety of industrial process operations.
dc.affiliationpl
Wydział Chemii : Zakład Chemii Nieorganicznej
dc.contributor.authorpl
Sobczak, Izabela
dc.contributor.authorpl
Decyk, Piotr
dc.contributor.authorpl
Ziółek, Maria
dc.contributor.authorpl
Roth, Wiesław - 228241
dc.contributor.authorpl
Campo, Betiana
dc.contributor.authorpl
Daturi, Marco
dc.contributor.authorpl
Kamiński, Piotr
dc.date.accessioned
2015-06-19T08:56:52Z
dc.date.available
2015-06-19T08:56:52Z
dc.date.issuedpl
2013
dc.description.numberpl
5
dc.description.physicalpl
2147-2159
dc.description.volumepl
117
dc.identifier.doipl
10.1021/jp310505y
dc.identifier.eissnpl
1932-7455
dc.identifier.issnpl
1932-7447
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/9893
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights.licence
Bez licencji otwartego dostępu
dc.subtypepl
Article
dc.titlepl
Zeolite MCM-22 modified with Au and Cu for catalytic total oxidation of methanol and carbon monoxide
dc.title.journalpl
The Journal of Physical Chemistry. C
dc.typepl
JournalArticle
dspace.entity.type
Publication
Affiliations

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