Scanning Tunneling Spectroscope Use in Electrocatalysis Testing

Materials

关键词: scanning tunneling microscope;    oxygen evolution reaction;    metallic glasses of Ni alloys;   

DOI  :  10.3390/ma3063675

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.