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Molecules 2016, 21(3), 261; doi:10.3390/molecules21030261

Au-Based Catalysts: Electrochemical Characterization for Structural Insights

Dipartimento di Chimica, Università degli Studi di Milano, via C. Golgi 19, 20133 Milano, Italy
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Academic Editor: Sonia A. C. Carabineiro
Received: 29 January 2016 / Revised: 19 February 2016 / Accepted: 22 February 2016 / Published: 25 February 2016
(This article belongs to the Special Issue Coinage Metal (Copper, Silver, and Gold) Catalysis)
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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. View Full-Text
Keywords: bimetallic catalyst characterization; cyclovoltammetry; electrochemical impedance spectroscopy; AuPd catalysts; synergistic effect bimetallic catalyst characterization; cyclovoltammetry; electrochemical impedance spectroscopy; AuPd catalysts; synergistic effect
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Pifferi, V.; Chan-Thaw, C.E.; Campisi, S.; Testolin, A.; Villa, A.; Falciola, L.; Prati, L. Au-Based Catalysts: Electrochemical Characterization for Structural Insights. Molecules 2016, 21, 261.

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