In situ spectroscopic study on the surface hydroxylation of diamond electrodes

Seiji Kasahara, Taiga Ogose, Norihito Ikemiya, Takashi Yamamoto, Keisuke Natsui, Yasuyuki Yokota, Raymond A. Wong, Shota Iizuka, Nagahiro Hoshi, Yoshitaka Tateyama, Yousoo Kim, Masashi Nakamura, Yasuaki Einaga

研究成果: Article

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Carbon-based materials are regarded as an environmentally benign alternative to the conventional metal electrode used in electrochemistry from the viewpoint of sustainable chemistry. Among various carbon electrode materials, boron-doped diamond (BDD) exhibits superior electrochemical properties. However, it is still uncertain how surface chemical species of BDD influence the electrochemical performance, because of the difficulty in characterizing the surface species. Here, we have developed in situ spectroscopic measurement systems on BDD electrodes, i.e., in situ attenuated total reflection infrared spectroscopy (ATR-IR) and electrochemical X-ray photoelectron spectroscopy (EC-XPS). ATR-IR studies at a controlled electrode potential confirmed selective surface hydroxylation. EC-XPS studies confirmed deprotonation of C-OH groups at the BDD/electrolyte interface. These findings should be important not only for better understanding of BDD's fundamentals but also for a variety of applications.

元の言語English
ジャーナルAnalytical chemistry
DOI
出版物ステータスPublished - 2019 1 1

ASJC Scopus subject areas

  • Analytical Chemistry

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    Kasahara, S., Ogose, T., Ikemiya, N., Yamamoto, T., Natsui, K., Yokota, Y., Wong, R. A., Iizuka, S., Hoshi, N., Tateyama, Y., Kim, Y., Nakamura, M., & Einaga, Y. (2019). In situ spectroscopic study on the surface hydroxylation of diamond electrodes. Analytical chemistry. https://doi.org/10.1021/acs.analchem.8b03834