Atomic-Level Structure and Dynamics of Ordered Metal Electrodes as Probed by Infrared Spectroscopy and Scanning Tunneling Microscopy
Abstract
Some recent applications of in-situ surface spectroscopy and scanning tunneling microscopy (STM) to the adsorption and reaction of small molecules on monocrystalline metal surfaces in electrochemical environments are outlined, with emphasis on the structural effects. Carbon monoxide adsorption and electrooxidation on low-index platinum, rhodium, and iridium surfaces in aqueous solutions as well as nonaqueous media are considered in comparison with the behavior of metal surfaces in ultrahigh vacuum. The combined use of FTIR and STM for the deduction of atomic-level CO adlayer structures is noted for Rh(111) and Rh(110). Real-time FTIR coupled with simultaneous or parallel voltammetric measurements yields molecule-specific information concerning the electrooxidation mechanisms of several small organic molecules on various low index platinum, rhodium, and bismuth-modified platinum surfaces. The acquisition of structural and dynamical information for potential-induced surface reconstruction on low index gold electrodes by means of atomic resolution STM is also outlined.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 28, 1992
- Accession Number
- ADA246738
Entities
People
- Michael J. Weaver
- Xudong Jiang
Organizations
- Purdue University