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电化学  2006 

不同直径碳纳米管的抗电化学氧化性

, PP. 288-291

Keywords: 碳纳米管,抗电化学氧化性,低温燃料电池,催化剂

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Abstract:

本文比较了由化学气相沉积法制备的不同直径(在100nm以内)的多壁碳纳米管(CNT)的抗电化学氧化性.将CNT电极于1.2V(vs.RHE)下电氧化120h,记录氧化电流~时间变化曲线;X射线光电子能谱(XPS)分析氧化前后CNT的表面化学组成.结果表明,随着CNT直径的减小,其氧化电流降低,但其中以为10~20nm的CNT电极氧化电流最小,表面氧的增量也最小,即被氧化的程度最低,抗电化学氧化性最强.根据不同直径CNT的缺陷位、不定型碳的丰度和碳原子的应力能,分析了其抗电化学氧化性差异的原因.

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