A review on photoelectrochemical cathodic protection semiconductor thin films for metals

• 来源期刊: 绿色能源与环境（英文版）
• 年，卷（期）: 2017,（4）
• 所属期刊栏目: Review article
• 页码范围: 331-362
• 页数: 32页
• 语种: 中文

摘要

Photoelectrochemical (PEC) cathodic protection is considered as an environment friendly method for metals anticorrosion. In this tech-nology, a n-type semiconductor photoanode provides the photogenerated electrons for metal to achieve cathodic protection. Comparing with traditional PEC photoanode for water splitting, it requires the photoanode providing a suitable cathodic potential for the metal, instead of pursuit ultimate photon to electric conversion efficiency, thus it is a more possible PEC technology for engineering application. To date, great efforts have been devoted to developing novel n-type semiconductors and advanced modification method to improve the performance on PEC cathodic protection metals. Herein, recent progresses in this field are summarized. We highlight the fabrication process of PEC cathodic protection thinfilm, various nanostructure controlling, doping, compositing methods and their operation mechanism. Finally, the current challenges and future potential works on improving the PEC cathodic protection performance are discussed.