In situ electrochemical scanning tunneling microscopy of single-crystal surfaces of Pt(111), Rh(111), and Pd(111) in aqueous sulfuric acid solution
- Tohoku Univ., Sendai (Japan)
This paper reports on in situ electrochemical scanning tunneling microscopy (STM) applied to single-crystal platinum(111), rhodium(111), and palladium(11) surfaces in an aqueous sulfuric acid solution. Atomically flat surfaces on Pt(111) are roughened in solutions by the electrochemical oxidation-reduction cycle. It is shown that a single potential cycle causes the formation of many adatoms and very small clusters on the Pt(111) terrace. A steady-state surface structure can be clearly observed after applying a few potential cycles. The STM image is composed of regularly arrayed islands whose diameter and height are in the ranges of 2-3 and 0.5-0.75 nm, respectively. Atomically flat terrace-step structures can be also observed on Rh(111) and Pd(111) surfaces. The effect of oxidation-reduction cycle on these surfaces is also discussed.
- OSTI ID:
- 5231605
- Journal Information:
- Journal of Vacuum Science and Technology. B, Microelectronics Processing and Phenomena; (United States), Vol. 9:2; ISSN 0734-211X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PALLADIUM
ELECTROCHEMICAL CORROSION
SURFACE PROPERTIES
PLATINUM
RHODIUM
AQUEOUS SOLUTIONS
ELECTROCHEMISTRY
IN-SITU PROCESSING
MICROSCOPY
ROUGHNESS
SULFURIC ACID
CHEMICAL REACTIONS
CHEMISTRY
CORROSION
DISPERSIONS
ELEMENTS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
METALS
MIXTURES
PLATINUM METALS
PROCESSING
SOLUTIONS
TRANSITION ELEMENTS
360105* - Metals & Alloys- Corrosion & Erosion
360104 - Metals & Alloys- Physical Properties