In this study,titanium nitride nanotubes (TiN NTs) film is directly prepared on a Ti substrate through anodic oxidation process and subsequent nitridation in ammonia atmosphere.The prepared TiN NTs film is proposed as a novel catalyst towards V(Ⅱ)/V(Ⅲ) redox couple for the negative electrode in a static vanadium redox battery.Scanning electron microscopy (SEM) results confirm that TiN NTs retain its parental morphology of TiO2 NTs.X-ray diffraction (XRD) pattern show that TiO2 is transformed into TiN and Ti2N.X-ray photoelectron spectroscopy (XPS) spectra reveal that the surface of TiN NTs is composed of Ti-N-O,Ti-N,Ti-O chemical states.Electrochemical properties of TiN NTs were characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS).The higher peak current values and more symmetrical peak shape for V(Ⅱ)/V(Ⅲ) redox couple suggest the excellent electrochemical activity and reversibility of TiN NTs.EIS analysis revealed that the charge and mass transfer processes were accelerated at the TiN NTs electrode interface,which could be ascribed to the large electrochemical real surface area and fast transfer channel.%采用阳极氧化法在钛箔表面原位生长二氧化钛纳米管,随后在氨气氛围中氮化还原制备氮化钛纳米管,并将此电极直接作为钒电池的负极,研究其对V(Ⅱ)/V(Ⅲ)的电化学性能.通过X射线衍射(XRD)、扫描电镜(SEM)以及X射线光电子能谱(XPS)等材料测试手段对氮化钛纳米管的形貌、组成和结构进行表征.分析结果表明,氨气高温氮化后,前驱体TiO2相转变为TiN和Ti2N相,表面元素组成为Ti-N-O,Ti-N和Ti-O,且其形貌仍保持纳米管的微观结构.采用循环伏安,电化学阻抗和充放电测试表明,氮化钛纳米管对负极电解液中的V(Ⅱ)/V(Ⅲ)展现了优异的电催化活性和可逆性,这主要归因于氮化钛纳米管大的电化学真实表面积和快速的电子转移通道.
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