题目：

CuWO₄ Nanoflake Array-Based Single-Junction and Heterojunction Photoanodes for Photoelectrochemical Water Oxidation

作者：

Wen Ye, Fengjiao Chen, Feipeng Zhao, Na Han and Yanguang Li*

单位：

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China

摘要：

Over recent years, tremendous efforts have been invested on the search and development of active and durable semiconductor materials for photoelectrochemical (PEC) water splitting, particularly for photoanodes operating under highly oxidizing environment. CuWO₄ is an emerging candidate with suitable band gap and high chemical stability. Nevertheless, its overall solar-to-electricity remains low owing to the inefficient charge separation process. In this work, we demonstrate that this problem can be partly alleviated through designing three-dimensional hierarchical nanostructures. CuWO₄ nanoflake arrays on conducting glass are prepared from the chemical conversion of WO₃ templates. Resulting electrode materials possess large surface areas, abundant porosity and small thickness. Under illumination, our CuWO₄ nanoflake array photoanodes exhibit an anodic current density of ~0.4 mA/cm² at the thermodynamic potential of water splitting in pH 9.5 potassium borate buffer ― the largest value among all available CuWO₄-based photoanodes. In addition, we demonstrate that their performance can be further boosted to >2 mA/cm² by coupling with a solution-cast BiVO₄ film in a heterojunction configuration. Our study unveils the great potential of nanostructured CuWO₄ as the photoanode material for PEC water oxidation.

影响因子：

6.723

分区情况：

1区

链接：

http://pubs.acs.org/doi/abs/10.1021/acsami.6b03176