Zr4+-Doped Anatase TiO2 Nanotube Array Electrode for Electrocatalytic Reduction of L-cystine

Weizhen Wang; Guangxin Wang; Xuhui Zhao; Xiaofeng Zhang; Yuming Tang; Yu Zuo

doi:10.3390/ma13163572

Zr⁴⁺-Doped Anatase TiO₂ Nanotube Array Electrode for Electrocatalytic Reduction of L-cystine

Materials (Basel). 2020 Aug 13;13(16):3572. doi: 10.3390/ma13163572.

Authors

Weizhen Wang¹, Guangxin Wang¹, Xuhui Zhao¹, Xiaofeng Zhang¹, Yuming Tang¹, Yu Zuo¹

Affiliation

¹ Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China.

Abstract

A Zr⁴⁺-doped anatase TiO₂ nanotube array electrode was prepared using a process that included Ti anodizing, chemical immersion, and heat treatment. The compositions, microstructure, and electrochemical properties of the prepared electrodes were characterized. The results show that Zr⁴⁺ was successfully introduced into the TiO₂ nanotube array electrodes. Because Zr⁴⁺ was doped into the crystal structure of the TiO₂and replaced a part of Ti⁴⁺ to form more oxygen vacancies and Ti³⁺, the electrocatalytic activity of the prepared electrodes, for the reduction of L-cystine, was significantly improved.

Keywords: electrocatalysis; nanocomposites; oxidation; titanium dioxide.