TY - JOUR
T1 - In Situ Spectroscopic Study on the Surface Hydroxylation of Diamond Electrodes
AU - Kasahara, Seiji
AU - Ogose, Taiga
AU - Ikemiya, Norihito
AU - Yamamoto, Takashi
AU - Natsui, Keisuke
AU - Yokota, Yasuyuki
AU - Wong, Raymond A.
AU - Iizuka, Shota
AU - Hoshi, Nagahiro
AU - Tateyama, Yoshitaka
AU - Kim, Yousoo
AU - Nakamura, Masashi
AU - Einaga, Yasuaki
N1 - Funding Information:
This work was supported, in part, by JSPS KAKENHI Grant JP15K05138, a “Materials Research by Information Integration” initiative (MI2I) project of the Japan Science and Technology Agency (JST), and MEXT as a “Priority Issue (No.5) on Post K Computer”. The calculations were carried out on the supercomputers in NIMS, Institute for Solid State Physics, and The University of Tokyo. This research also used the computational resources of the K computer and other computers of the HPCI system through the HPCI System Research Project (Project IDs: hp160225, hp160075, and hp160080).
Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019/4/16
Y1 - 2019/4/16
N2 - 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.
AB - 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.
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U2 - 10.1021/acs.analchem.8b03834
DO - 10.1021/acs.analchem.8b03834
M3 - Article
C2 - 30838845
AN - SCOPUS:85063145165
SN - 0003-2700
VL - 91
SP - 4980
EP - 4986
JO - Analytical Chemistry
JF - Analytical Chemistry
IS - 8
ER -