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Electrode Potential-Induced Morphology of Au, Pt and Au-Cu Alloy Particles Formed in Solution

Published online by Cambridge University Press:  02 July 2020

Da-ling Lu  and
Ken-ichi Tanaka
Da-ling Lu
Affiliation:
The Institute for Solid State Physics, The University of Tokyo, 7-22-1, Roppong, Minato-ku, Tokyo106, Japan
Ken-ichi Tanaka
Affiliation:
The Institute for Solid State Physics, The University of Tokyo, 7-22-1, Roppong, Minato-ku, Tokyo106, Japan
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Extract

It has been well known that Au single crystal undergoes reconstruction in vacuum as well as in acidic solutions at negative electrode potentials. The reconstruction is lifted when electrode potential sweeps to positive values. Taking into account of these facts we considered when Au particles grow on an electrode in solution at different electrode potentials, morphology of the particles may be different. Based on this idea, we investigated formation of Au, Pt and Au-Cu alloy particles grown in solutions and observed icosahedral and decahedral particles of Au and Pt formed at negative potentials. These particles are identical with multiply twinned particles (MTPs) observed in vacuum.

Particles were electrodeposited on an amorphous carbon film which was evaporated on a collodion film supported by a Au mesh as required for viewing in a transmission electron microscope (TEM). A three-compartment electrochemical cell was employed at room temperature with Pt wire counter electrode

Type
Nanocrystals and Nanocomposites: Novel Structures For Catalysis, Electronics, and Micromechanics
Information
Microscopy and Microanalysis , Volume 3 , Issue S2: Proceedings: Microscopy & Microanalysis '97, Microscopy Society of America 55th Annual Meeting, Microbeam Analysis Society 31st Annual Meeting, Histochemical Society 48th Annual Meeting, Cleveland, Ohio, August 10-14, 1997 , August 1997 , pp. 415 - 416
Copyright
Copyright © Microscopy Society of America 1997

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References

van Hove, M.A.et al., Surface Science, 103(1981)189.10.1016/0039-6028(81)90107-2CrossRefGoogle Scholar
Hamelin, A., Journal of Electroanalytical Chemistry, 142(1982)299.10.1016/S0022-0728(82)80023-5CrossRefGoogle Scholar
Kolb, D.M. and Schneider, J., Surface Science, 162(1985)764.10.1016/0039-6028(85)90977-XCrossRefGoogle Scholar
Ino, S., Journal of the Physical Society of Japan, 21(1966)346.10.1143/JPSJ.21.346CrossRefGoogle Scholar
Ino, S., Journal of the Physical Society of Japan, 27(1969)941.10.1143/JPSJ.27.941CrossRefGoogle Scholar
Gao, X.et al., Journal of Chemical Physics, 95(1991)6993.10.1063/1.461043CrossRefGoogle Scholar
Gao, X.et al., Physical Review B, 44(1991)10983.10.1103/PhysRevB.44.10983CrossRefGoogle Scholar
Gao, X.et al., Physical Review Letters, 67(1991)618.10.1103/PhysRevLett.67.618CrossRefGoogle Scholar