CAJ | 학술논문

对硼掺杂纳米金刚石(BDND),硼掺杂微米金刚石(BDMD)和玻碳(GC)电极的电化学性质做了对比研究.利用扫描电子显微镜表征了BDMD和BDND电极,其表面粒子大小分别为1-5 μm和20-100 nm.利用Raman光谱对两种金刚石薄膜的成分进行了表征,结果表明利用热丝化学气相沉积法得到了高质量的BDND和BDMD薄膜.采用0.5 mol·L-1 H2SO4溶液测定了三种电极的电化学窗口,BDND和BDMD电极的电化学窗口分别为3.3和3.0 V,远比GC电极(2.5 V)的要宽.[Fe(CN)6]3-/[Fe(CN)6]4-溶液的循环伏安和交流阻抗测定表明,在BDND、BDMD和GC电极上的峰间距(△Ep)分别为73、92和112 mV,且其电子传递电阻(Ra)分别为(98±5)、(260±19)和(400±25)Ω.我们也研究了0.1 mmol·L-1双酚A在三种电极上的电化学氧化行为.上述的电化学测定结果表明,两种金刚石电极均比GC电极表现出了更宽的电化学窗口、更好的电化学可逆性质、更快的电子传递速度和更高的电化学稳定性,更为重要的是与BDMD相比BDND的电化学性质有进一步的提高.
대붕참잡납미금강석(BDND),붕참잡미미금강석(BDMD)화파탄(GC)전겁적전화학성질주료대비연구.이용소묘전자현미경표정료BDMD화BDND전겁,기표면입자대소분별위1-5 μm화20-100 nm.이용Raman광보대량충금강석박막적성분진행료표정,결과표명이용열사화학기상침적법득도료고질량적BDND화BDMD박막.채용0.5 mol·L-1 H2SO4용액측정료삼충전겁적전화학창구,BDND화BDMD전겁적전화학창구분별위3.3화3.0 V,원비GC전겁(2.5 V)적요관.[Fe(CN)6]3-/[Fe(CN)6]4-용액적순배복안화교류조항측정표명,재BDND、BDMD화GC전겁상적봉간거(△Ep)분별위73、92화112 mV,차기전자전체전조(Ra)분별위(98±5)、(260±19)화(400±25)Ω.아문야연구료0.1 mmol·L-1쌍분A재삼충전겁상적전화학양화행위.상술적전화학측정결과표명,량충금강석전겁균비GC전겁표현출료경관적전화학창구、경호적전화학가역성질、경쾌적전자전체속도화경고적전화학은정성,경위중요적시여BDMD상비BDND적전화학성질유진일보적제고.
The electrochemical properties of three carbon-based electrodes including boron-doped nanocrystalline diamond (BDND), boron-doped microcrystalline diamond (BDMD), and glassy carbon (GC) were compared. We used scanning electron microscopy to characterize the two diamond electrodes and the grain sizes of the BDMD and BDND films were 1-5 μm and 20-100 nm, respectively. The phase composition was characterized by Raman spectroscopy and high-quality BDMD and BDND films were formed by hot-filament chemical vapor deposition. Cyclic 3.3 and 3.0 V, respectively. The potential windows were much wider than that of the GC electrode (2.5 V). The cyclic voltammograms and Nyquist plots of the impedance measurements for [Fe(CN)6]3-/[Fe(CN)6]4- show peak to peak separations (△Ep) of 73, 92, and 112 mV and electron transfer resistances (Ra)of (98±5), (260±19), and (400±25) Ω for (BPA) on the three carbon-based electrodes. The above-mentioned electrochemical results reveal that the two diamond electrodes have wider potential windows, better reversibility, faster electron transfer, and higher stability than the GC electrode. Additionally, the BDND electrode shows better electrochemical properties than the BDMD electrode.