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Cyclic Voltammetry Characterization of Au, Pd, and AuPd Nanoparticles Supported on Different Carbon Nanofibers

Testolin, Anna; Cattaneo, Stefano; Wang, Wu; Wang, Di ORCID iD icon; Pifferi, Valentina; Prati, Laura; Falciola, Luigi; Villa, Alberto

Abstract (englisch):

Three types of carbon nanofibers (pyrolytically stripped carbon nanofibers (PS), low-temperature heat treated carbon nanofibers (LHT), and high-temperature heat treated carbon nanofibers (HHT)) with different graphitization degrees and surface chemistry have been used as support for Au, Pd, or bimetallic AuPd alloy nanoparticles (NPs). The carbon supports have been characterized using Raman, X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). Moreover, the morphology of the metal nanoparticles was investigated using transmission electron microscopy (TEM) and CV. The different properties of the carbon-based supports (particularly the graphitization degree) yield different electrochemical behaviors, in terms of potential window widths and electrocatalytic effects. Comparing the electrochemical behavior of monometallic Au and Pd and bimetallic AuPd, it is possible to observe the interaction of the two metals when alloyed. Moreover, we demonstrate that carbon surface has a strong effect on the electrochemical stability of AuPd nanoparticles. By tuning the Au-Pd nanoparticles’ morphology and modulating the surface chemistry of the carbon support, it is possible to obtain materials characterized by novel electrochemical properties. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000100826
Veröffentlicht am 12.12.2019
DOI: 10.3390/surfaces2010016
Zitationen: 12
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 2571-9637
KITopen-ID: 1000100826
HGF-Programm 43.22.02 (POF III, LK 01) Nanocatalysis
Erschienen in Surfaces
Band 2
Heft 1
Seiten 205–215
Vorab online veröffentlicht am 19.03.2019
Schlagwörter gold; palladium; bimetallic alloy; carbon nanofibers (CNFs); cyclic voltammetry (CV); 2018-020-023389 2016-016-013209 TEM
Nachgewiesen in Dimensions
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