Electrochemical deposition of platinum hydrosol on graphite observed by scanning tunneling microscopy

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Journal of Catalysis

DOI:https://doi.org/10.1006/jcat.1996.0351· OSTI ID:501860

Shaikhutdinov, Sh K; Moeller, F A; Mestl, G; Behm, R J ^[1]

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1. Universitaet Ulm (Germany)

Ligand stabilized metal colloids are discussed as promising candidates for metal catalyst precursors or even supported catalysts. The protective shell around the metal particles prevents their agglomeration and leads to a highly dispersed metal phase. A narrow metal particle size distribution, as revealed by transmission electron microscopy, is achieved by specific reduction techniques. These catalysts are generally prepared by adsorption, i.e., by adding the support material to the colloidal solution, followed by a drying step. Another way to prepared supported catalysts is electrophoretic deposition, which was recently demonstrated for a gold colloid. For conductive supports, such as carbon, an electrochemical deposition of colloids can be envisioned also. To our knowledge this has not been investigated yet. In this note the authors present, first, the results of a combined scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) study on the electrochemical deposition of platinum nanocolloids with an organic shell (hydrosol) onto highly oriented pyrolytic graphite (HOPG). 7 refs., 3 figs.

• OSTI ID: 501860
• Journal Information: Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 2 Vol. 163; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
CATALYST SUPPORTS
CATALYSTS
ELECTRODEPOSITION
GRAPHITE
PLATINUM
SCANNING ELECTRON MICROSCOPY