RuO2-doping into high-aspect-ratio anodic TiO2 nanotubes by electrochemical potential shock for water oxidation

被引：21

作者：

Gim, Yeonmi ^{[1
]}

Seong, Mijeong ^{[1
]}

Choi, Yong-Wook ^{[1
]}

Choi, Jinsub ^{[1
]}

机构：

[1] Inha Univ, Ctr Design & Applicat Mol Catalysts, Dept Chem & Chem Engn, Inchon 402751, South Korea

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2015年 / 52卷

基金：

新加坡国家研究基金会;

关键词：

Nanotubes; TiO2; Potential shock; Water oxidation; PHOTOCATALYTIC ACTIVITY; EVOLUTION REACTION; OXYGEN EVOLUTION; FABRICATION; ELECTRODES; OXIDE; AG; BEHAVIOR; ARRAYS;

D O I：

10.1016/j.elecom.2015.01.004

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A novel method for homogenous incorporation of Ru (RuO2, or RuO3) into high aspect ratio anodic TiO2 NTs was studied. TiO2 NTs were prepared by anodization in HF based electrolyte, after which very short high applied potential, referred to as potential shock, was imposed on the TiO2 NTs in KRuO4 electrolyte. The high potential shock induced massive flow of RuO4- to positively-biased TiO2 NTs, resulting in the incorporation of Ru as a form of Ru, RuO2, and RuO3 in the TiO2 NTs. Optimal potential shock, which allowed the most suitable amount and incorporation state of Ru catalysts in TiO2 NTs, was determined by SEM, TEM, EDS, XPS, and LSV. It was demonstrated that electrochemical potential shock (simply imposed on the anodic TiO2 for a few seconds in the electrolyte of KRuO4) resulted in homogenous incorporation of Ru into the whole nanotubes without the need for any complicated steps or facilities. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：37 / 40

页数：4

共 27 条

[1] Fabrication of Ag-loaded multi-walled TiO2 nanotube arrays and their photocatalytic activity [J].