Citation: ZHAO Feng-Ming, WEN Gang, KONG Li-Yao, CHU You-Qun, MA Chun-An. Structure Characteristic of Titanium Nitride Nanowires and Its Electrode Processes for V(II)/V(III) Redox Couple[J]. Acta Physico-Chimica Sinica, ;2017, 33(6): 1181-1188. doi: 10.3866/PKU.WHXB201703151 shu

Structure Characteristic of Titanium Nitride Nanowires and Its Electrode Processes for V(II)/V(III) Redox Couple

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College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China;
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State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Hangzhou 310014, P. R. China

Received Date: 27 December 2016
Revised Date: 28 February 2017

Fund Project: The project was supported by the Natural Science Foundation of Zhejiang Province, China (LY17B050006).

Titanium nitride nanowires (TiN NWs) were directly prepared on a Ti foil by a hydrothermal method followed by nitridation in ammonia atmosphere. The composition, microstructure, and electrochemical properties of the TiN NWs were characterized using scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry(CV), and electrochemical impedance spectroscopy (EIS). The results show that the nanowires have diameters of 20-50 nm and are 5 μm long. The surfaces of the TiN NWs comprise Ti-N, Ti-O, and O-Ti-N chemical states. The electrochemical activity and reversibility for the electrode processes of V(II)/V(III) couple on the TiN NWs are significantly improved due to the introduced Ti-N, Ti-O, and O-Ti-N chemical states. The transfer resistance for the cathodic reduction of V(III) on the TiN NWs is about 20 times and 10 times smaller than on TiO₂ NWs and graphite electrodes, respectively. The rate constant of charge transfer on the TiN NWs electrode was determined to be 5.21×10^-4 cm·s_-1, which is about 5 times larger than the rate constant on graphite electrodes (9.63×10^-5 cm·s^-1).
- Vanadium battery,
- Titanium nitride nanowire,
- V(II)/V(III),
- Electrode process
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