Enhanced photoelectrochemical performance of TiO2 nanotube arrays with coexisted Pt nanoparticles and Co-Pi cocatalysts

被引：18

作者：

Li, Yanfang ^{[1
]}

Cao, Chang ^{[1
]}

Xie, Xinxin ^{[1
]}

Zhang, Li ^{[1
]}

Lin, Shiwei ^{[1
]}

机构：

[1] Hainan Univ, Coll Mat & Chem Engn, Key Lab, Minist Educ Adv Mat Trop Isl Resources, Haikou 570228, Hainan, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2018年 / 436卷

基金：

中国国家自然科学基金;

关键词：

TiO2 Nanotube arrays; Cocatalysts; Photoelectrochemical performance; Water splitting; HYDROGEN GENERATION; OXYGEN EVOLUTION; WATER; PHOTOCATALYSIS; FABRICATION; EFFICIENCY; COMPOSITE; OXIDATION; CATALYST;

D O I：

10.1016/j.apsusc.2017.12.062

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Highly-ordered TiO2 nanotube arrays (TNTAs) were prepared by electrochemical anodization. Cobalt-phosphate (Co-Pi) film fabricated by electrodeposition and Pt nanoparticles (Pt NPs) fabricated by photochemical reduction were decorated onto TNTAs to enhance the photoelectrochemical (PEC) performance together. The photocurrent density of the TNTAs/Co-Pi/Pt photoelectrode could reach 0.185 mA/cm(2) at 1.23 V versus reversible hydrogen electrode under UV lamp illumination (1 mW/cm(2)), which is 2.65 times compared to that of the pure TNTAs photoelectrode. Electrochemistry impedance spectroscopy and Mott-Schottky analysis were conducted to explore the reasons for the enhancement of the PEC performance. Pt NPs could promote the reduction of Co(IV)-oxo intermediate to Co(II) or Co(III) which facilitated the charge transfer in the PEC performance. The result provides a promising guideline to design a simple and efficient photoelectrode for the PEC water-splitting system. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：337 / 344

页数：8

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