氮化钛纳米线的结构特征及其对V(II)/V(III)的电极过程

引用本文: 赵峰鸣, 闻刚, 孔丽瑶, 褚有群, 马淳安. 氮化钛纳米线的结构特征及其对V(II)/V(III)的电极过程[J]. 物理化学学报, 2017, 33(6): 1181-1188. doi: 10.3866/PKU.WHXB201703151 shu

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

氮化钛纳米线的结构特征及其对V(II)/V(III)的电极过程

1.
浙江工业大学化学工程学院, 杭州 310014;
2.
绿色化学合成技术国家重点实验室培育基地, 杭州 310014
基金项目:
浙江省自然科学基金（LY17B050006）资助项目

摘要: 采用水热法在钛片表面直接生长二氧化钛纳米线（TiO₂ NWs），随后通过氨氮还原转化为氮化钛纳米线（TiN NWs）。利用扫描电镜（SEM）、透射电镜（TEM）、X射线光电子能谱（XPS）、循环伏安法（CV）和电化学阻抗谱（EIS）对材料的组成、微观结构和电极过程动力学的特征进行表征。结果表明，TiN NWs纳米线的直径约20-50 nm，长度超过5 μm，其表面可能存在Ti-N键、Ti-O键和O-Ti-N键，这种含氮和含氧的化学态使得TiN NWs电极具有更好的电导性和电催化性能。TiN NWs电极对V（II）/V（III）离子表现出更好的可逆性，其电极反应电阻R_ct值比TiO₂ NWs和石墨电极分别小约20倍和10倍。同时，TiN NWs电极上V（III）还原反应的速率常数为5.21×10^-4 cm·s^-1，约是石墨电极（速率常数9.63×10^-5 cm·s^-1）的5倍，这可归因于TiN NWs的一维纳米线微结构特征及其较高的电催化性能。

关键词:

English

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

1.
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China;
2.
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
Available Online: 15 March 2017
Fund Project:
The project was supported by the Natural Science Foundation of Zhejiang Province, China (LY17B050006).

Abstract: 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).

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

氮化钛纳米线的结构特征及其对V(II)/V(III)的电极过程

English

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

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

氮化钛纳米线的结构特征及其对V(II)/V(III)的电极过程

English

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

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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