E-resources
Peer reviewed
-
Zamanzad Ghavidel, M.R.; Monteverde Videla, Alessandro H.A.; Specchia, Stefania; Easton, E. Bradley
Electrochimica acta, 03/2017, Volume: 230Journal Article
Display omitted •Pt0.25Cu0.75/C catalysts were prepared & tested for ethanol oxidation activity.•The preparation method alters the Pt-Cu particle size and crystalline composition.•Heat treatment at 700°C leads to the formation of the Pt-Cu intermetallic phase.•The Pt-Cu intermetallic phase has increased activity towards ethanol oxidation. In this study, the Pt-Cu/C alloy with nominal composition of Pt0.25Cu0.75 was produced via three different methods impregnation, impregnation in the presence of sodium citrate additive and microwave assisted polyol method. Each method produced catalysts with differing structural and electrochemical properties. These catalysts were also heat treated to induce changes in the crystalline structure which in turn altered the activity towards the ethanol oxidation reaction (EOR). The crystalline structure, particle dispersion and chemical composition of the Pt-Cu samples were studied by Thermogravimetric Analysis (TGA), X-ray Powder Diffraction (XRD), Transmission Electron Microscopy (TEM) Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) and X-ray photoelectron spectroscopy (XPS). The ICP, XPS, TGA and TEM results indicate each synthetic method produced catalysts with different chemical composition, metal loadings and particle dispersion. The XRD analysis showed that the heat treatment of the Pt-Cu/C samples resulted in ordered intermetallic crystalline structures such as PtCu and PtCu3. The highest EOR activity was observed for samples rich in intermetallic ordered phases, PtCu in particular. XPS and CO stripping measurements indicates that the electronic structure of the Pt-rich surface of the Pt-Cu particles was altered due to formation of intermetallic phases and the Cu-rich core.
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.