Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7720666 | International Journal of Hydrogen Energy | 2014 | 7 Pages |
Abstract
The electrochemical properties of single-crystalline p-type 3C-SiC films on p-Si substrate were investigated as an electrode in H2SO4 aqueous solutions in dark and under white light illumination. The photoelectrochemical (PEC) measurements indicates the p-type 3C-SiC film on p-Si substrate can generate a cathodic photocurrent as a photocathode, which corresponds to hydrogen production, and generate an anodic photocurrent as a photoanode, which corresponds to oxygen evolution. The surface chemical states of the films were investigated by XPS. In order to observe the surface chemical state changes after PEC test, the range of applied potential to the electrode was divided into three zones: â3.6 to 0Â V, 0-1.5Â V and 1.5-4Â V vs. Ag/AgCl. After separated PEC tests in these three areas, XPS shows the surface of the SiC film in the range of â3.6 to 0Â V and 0-1.5Â V was stable without oxidation except the band bending occurred. But in the range of 1.5-4Â V the film surface was oxidized due to anodic oxidation.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Quan-Bao Ma, Jürgen Ziegler, Bernhard Kaiser, Dominic Fertig, Wolfram Calvet, Eswaran Murugasen, Wolfram Jaegermann,