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Materials 2010, 3(6), 3675-3693; doi:10.3390/ma3063675
Article

Scanning Tunneling Spectroscope Use in Electrocatalysis Testing

Received: 29 April 2010 / Revised: 21 May 2010 / Accepted: 8 June 2010 / Published: 14 June 2010
(This article belongs to the Special Issue SPM in Materials Science)
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Abstract

The relationship between the electrocatalytic properties of an electrode and its ability to transfer electrons between the electrode and a metallic tip in a scanning tunneling microscope (STM) is investigated. The alkaline oxygen evolution reaction (OER) was used as a test reaction with four different metallic glasses, Ni78Si8B14, Ni70Mo20Si5B5, Ni58Co20Si10B12, and Ni25Co50Si15B10, as electrodes. The electrocatalytic properties of the electrodes were determined. The electrode surfaces were then investigated with an STM. A clear relationship between the catalytic activity of an electrode toward the OER and its tunneling characteristics was found. The use of a scanning tunneling spectroscope (STS) in electrocatalytic testing may increase the efficiency of the optimization of electrochemical processes.
Keywords: scanning tunneling microscope; oxygen evolution reaction; metallic glasses of Ni alloys scanning tunneling microscope; oxygen evolution reaction; metallic glasses of Ni alloys
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Knutsen, T. Scanning Tunneling Spectroscope Use in Electrocatalysis Testing. Materials 2010, 3, 3675-3693.

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