Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of Argon Addition on Properties of the Boron-Doped Diamond Electrode

아르곤 가스의 주입이 붕소 도핑 다이아몬드 전극의 특성에 미치는 효과

  • Choi, Yong-Sun (Dept. of Information & Electronics Engineering, Uiduk University) ;
  • Lee, Young-Ki (Division of Green Energy Engineering, Uiduk University) ;
  • Kim, Jung-Yuel (Division of Green Energy Engineering, Uiduk University) ;
  • Lee, You-Kee (Division of Green Energy Engineering, Uiduk University)
  • 최용선 (위덕대학교 일반대학원 정보전자공학과) ;
  • 이영기 (위덕대학교 그린에너지공학부) ;
  • 김정열 (위덕대학교 그린에너지공학부) ;
  • 이유기 (위덕대학교 그린에너지공학부)
  • Received : 2018.04.02
  • Accepted : 2018.04.26
  • Published : 2018.05.27
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Abstract

A boron-doped diamond(BDD) electrode is attractive for many electrochemical applications due to its distinctive properties: an extremely wide potential window in aqueous and non-aqueous electrolytes, a very low and stable background current and a high resistance to surface fouling. An Ar gas mixture of $H_2$, $CH_4$ and trimethylboron (TMB, 0.1 % $C_3H_9B$ in $H_2$) is used in a hot filament chemical vapor deposition(HFCVD) reactor. The effect of argon addition on quality, structure and electrochemical property is investigated by scanning electron microscope(SEM), X-ray diffraction(XRD) and cyclic voltammetry(CV). In this study, BDD electrodes are manufactured using different $Ar/CH_4$ ratios ($Ar/CH_4$ = 0, 1, 2 and 4). The results of this study show that the diamond grain size decreases with increasing $Ar/CH_4$ ratios. On the other hand, the samples with an $Ar/CH_4$ ratio above 5 fail to produce a BDD electrode. In addition, the BDD electrodes manufactured by introducing different $Ar/CH_4$ ratios result in the most inclined to (111) preferential growth when the $Ar/CH_4$ ratio is 2. It is also noted that the electrochemical properties of the BDD electrode improve with the process of adding argon.

Keywords

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