Enhancement of electrical conductivity and electrochemical activity of hydrogenated amorphous carbon by incorporating boron atoms

11th Asia Pacific Conference on Plasma Science and Technology;25th Symposium on Plasma Science for Materials

Naragino, Hiroshi^1 ; Yoshinaga, Kohsuke^1 ; Nakahara, Akira^1 ; Tanaka, Sakuya^1 ; Honda, Kensuke^1

Graduate School of Science and Engineering, Yamaguchi University, 1677-1, Yoshida, Yamaguchi-shi, Yamaguchi 753-8512, Japan^1

关键词: Electrical conductivity;    Electrochemical activities;    Electrode material;    High resistance;    Hydrogen evolution;    Hydrogenated amorphous carbon;    Volume resistivity;    Water electrolysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/441/1/012042/pdf
DOI  :  10.1088/1742-6596/441/1/012042

来源: IOP

【 摘 要 】

Conductive boron-doped hydrogenated amorphous carbon (B-DLC) thin films were successfully synthesized with RF plasma-enhanced CVD method. By incorporating boron atoms in amorphous carbon, conduction types were changed from n- to p-type, and volume resistivity was decreased from 30.4 (non-doped) to 6.36 × 10-2Ω cm (B/C 2.500 atom%). B-DLC film with sp2/(sp2+ sp3) carbons of 75 atom% exhibited high resistance to electrochemically-induced corrosion in strong acid solution. Furthermore, it was clarified that boron atoms in DLC could enhance kinetics of hydrogen evolution during water electrolysis at B-DLC surface. B-DLC is, therefore, a promising electrode material for hydrogen production by increasing the concentration of boron atoms in B-DLC and enhancing the reactivity of H2evolution.