Au-based catalysts are widely used in important processes because of their peculiar characteristics. The catalyst performance depends strongly on the nature and structure of the metal nanoparticles, especially in the case of bimetallic catalysts where synergistic effects between the two metals can be occasionally seen. In this paper, it is shown that electrochemical characterisation (cyclovoltammetry CV and electrochemical impedance spectroscopy EIS) of AuPd systems can be used to determine the presence of an electronic interaction between the two metals, thus providing a strong support in the determination of the nature of the synergy between Au and Pd in the liquid phase oxidation of alcohols. However, it seems likely that the strong difference in the catalytic behavior between the single metals and the bimetallic system is connected not only to the redox behaviour, but also to the energetic balance between the different elementary steps of the reaction.

Au-Based Catalysts : Electrochemical Characterization for Structural Insights / V. Pifferi, C.E. Chan-Thaw, S. Campisi, A. Testolin, A. Villa, L. Falciola, L. Prati. - In: MOLECULES. - ISSN 1420-3049. - 21:3(2016), pp. 261.1-261.9. [10.3390/molecules21030261]

Au-Based Catalysts : Electrochemical Characterization for Structural Insights

V. Pifferi
Primo
;
C.E. Chan-Thaw
Secondo
;
S. Campisi;A. Testolin;A. Villa;L. Falciola
Penultimo
;
L. Prati
2016

Abstract

Au-based catalysts are widely used in important processes because of their peculiar characteristics. The catalyst performance depends strongly on the nature and structure of the metal nanoparticles, especially in the case of bimetallic catalysts where synergistic effects between the two metals can be occasionally seen. In this paper, it is shown that electrochemical characterisation (cyclovoltammetry CV and electrochemical impedance spectroscopy EIS) of AuPd systems can be used to determine the presence of an electronic interaction between the two metals, thus providing a strong support in the determination of the nature of the synergy between Au and Pd in the liquid phase oxidation of alcohols. However, it seems likely that the strong difference in the catalytic behavior between the single metals and the bimetallic system is connected not only to the redox behaviour, but also to the energetic balance between the different elementary steps of the reaction.
bimetallic catalyst characterization; cyclovoltammetry; electrochemical impedance spectroscopy; AuPd catalysts; synergistic effect
Settore CHIM/01 - Chimica Analitica
Settore CHIM/02 - Chimica Fisica
Settore CHIM/03 - Chimica Generale e Inorganica
Article (author)
File in questo prodotto:
File Dimensione Formato  
molecules-21-00261.pdf

accesso aperto

Descrizione: Articolo pubblicato
Tipologia: Publisher's version/PDF
Dimensione 1.79 MB
Formato Adobe PDF
1.79 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/374063
Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 9
social impact