AN XPS STUDY OF THE REDUCTION PROCESS OF CuO-ZnO-Al2O3 CATALYSTS OBTAINED FROM HYDROXYCARBONATES PRECURSORS (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• AN XPS STUDY OF THE REDUCTION PROCESS OF CuO-ZnO-Al2O3 CATALYSTS OBTAINED FROM HYDROXYCARBONATES PRECURSORS (Articolo in rivista) (literal)

Anno

• 2006-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1002/sia.2129 (literal)

Alternative label

• MORETTI G.; FERRARIS G. ; FIERRO G.; LO JACONO M. (2006)
  AN XPS STUDY OF THE REDUCTION PROCESS OF CuO-ZnO-Al2O3 CATALYSTS OBTAINED FROM HYDROXYCARBONATES PRECURSORS
  in Surface and interface analysis (Online); John Wiley & Sons, Ltd., Chichester (Regno Unito), Chichester (Regno Unito)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• MORETTI G.; FERRARIS G. ; FIERRO G.; LO JACONO M. (literal)

Pagina inizio

• 224 (literal)

Pagina fine

• 228 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 38 (literal)

Rivista

• Surface and interface analysis (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

• 5 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 4 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• MORETTI G. [1]; FERRARIS G. [2]; FIERRO G. [2]; LO JACONO M. [1] --- [1] Dipartimento di Chimica - Università di Roma 'SAPIENZA'; [2] Consiglio Nazionale delle Ricerche - Istituto dei Sistemi Complessi (ISC), Sezione di Roma '‘Materiali Inorganici e Catalisi Eterogenea’' (MICE, ex Centro di Studio CNR ‘'SACSO'’), c/o Dipartimento di Chimica, Università di Roma 'SAPIENZA'; (literal)

Titolo

• AN XPS STUDY OF THE REDUCTION PROCESS OF CuO-ZnO-Al2O3 CATALYSTS OBTAINED FROM HYDROXYCARBONATES PRECURSORS (literal)

Abstract

• CuO-ZnO-Al2O3 catalystswith different Cu/Zn/Al atomic ratioswere obtained by thermal decomposition of hydroxycarbonate precursors. The hydroxycarbonate precursors, prepared by coprecipitation at pH = 8, depending on the Cu/Zn/Al atomic ratios contain malachite Cu2CO3(OH)2, zincian-malachite Cu2-xZnxCO3(OH)2, aurichalcite Zn5-xCux(CO3)2(OH)6, hydrozincite Zn5(CO3)2(OH)6, and an hydrotalcitelike: Cu6-xZnxAl2(CO3)2(OH)16. Upon calcination, well interdispersed oxidic phases are obtained. In the ternary Cu/Zn/Al catalysts, the aluminium-containing phase was found to be amorphous and, regardless of the composition, only CuO and ZnO oxides are identified by X-ray diffraction analysis. The reduction process in H2 was studied by XPS and XAES. The reduction of the Cu(II) species leads to the formation of both Cu(I) (Cu2O) and Cu(0) species. The reduction process is much slower for the alumina-containing samples compared to the binary CuO/ZnO specimen. Alumina and ZnO play an important role in the stabilization of Cu(II) and Cu(I) chemical states at low temperature. Upon reduction at high temperature, alumina plays a key role by preventing the sintering process of the Cu(0) particles. (literal)

Editore

• John Wiley & Sons, Ltd., Chichester (Regno Unito) (Editore)

Autore CNR

• GIOVANNI FERRARIS (Unità di personale interno)
• GIUSEPPE FIERRO (Unità di personale interno)

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• Parole chiave di "AN XPS STUDY OF THE REDUCTION PROCESS OF CuO-ZnO-Al2O3 CATALYSTS OBTAINED FROM HYDROXYCARBONATES PRECURSORS" (Insieme di parole chiave)

Incoming links:

Autore CNR di

• GIUSEPPE FIERRO (Unità di personale interno)
• GIOVANNI FERRARIS (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Surface and interface analysis (Rivista)

Editore di

• John Wiley & Sons, Ltd., Chichester (Regno Unito) (Editore)

Prodotto

• http://www.cnr.it/ontology/cnr/individuo/modulo/ID2424

Insieme di parole chiave di

• Parole chiave di "AN XPS STUDY OF THE REDUCTION PROCESS OF CuO-ZnO-Al2O3 CATALYSTS OBTAINED FROM HYDROXYCARBONATES PRECURSORS" (Insieme di parole chiave)