Diamond foam electrodes for electrochemical applications

作者：Kato Hiromitsu^*; Hees Jakob; Hoffmann Rene; Wolfer Marco; Yang Nianjun; Yamasaki Satoshi; Nebel Christoph E

来源：Electrochemistry Communications, 2013, 33: 88-91.

DOI：10.1016/j.elecom.2013.04.028

• Diamond foam
• Nano-crystalline diamond
• Heavily boron doping
• Surface enlargement
• Electrode

Nano-structured electrodes become promising materials for a vast number of applications such as bio-chemical sensing and supercapacitors. We introduce a new concept to generate surface enlarged diamond electrodes, so-called "diamond foam". To obtain diamond foam electrodes, SiO2 spheres were used for heavily boron-doped (10(21) cm(-3)) nano-crystalline diamond (B-NCD) overgrowth in a microwave plasma reactor. After overgrowth with B-NCD the SiO2 spheres were etched away with HF giving rise to diamond foam consisted of B-NCD shells accumulated on the substrate. This process has the advantage that the thickness of diamond foam can increase infinitely by repeating the growth and etching processes. Structural and electrochemical characterizations show that the diamond foam electrodes show a surface enlargement of around 40 while keeping good chemical stability as well as a diamond related structural properties.

• 出版日期2013-8