J. Mater. Sci. Technol. ›› 2025, Vol. 221: 117-128.DOI: 10.1016/j.jmst.2024.08.068

• Research Article • Previous Articles     Next Articles

Assembly of WO3-Nb2O5-ZnIn2S4 with embedded quasi-planar heterojunction characteristics and its efficient and stable dark-state photoelectrochemical cathodic protection performance

Wanfeng Lia,b,1, Kaixuan Wanga,b,1, Weihua Lia,b,d,*   

  1. aHenan Academy of Sciences, Zhengzhou 450046, China;
    bInstitute of Chemistry, Henan Academy of Sciences, Zhengzhou 450046, China;
    cSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China;
    dSchool of Materials, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
  • Received:2024-06-05 Revised:2024-07-25 Accepted:2024-08-05 Published:2024-10-16 Online:2024-10-16
  • Contact: *Henan Academy of Sciences, Zhengzhou 450046, China. E-mail address:. liweihua1928@163.com (W. Li)
  • About author:1 These authors contributed equally to this work.

Abstract: Constructing a photoanode with both high dark-state protection performance and high stability remains a top priority for photoelectrochemical cathodic protection technology, especially in a marine environment (dark-state or rainy conditions) without hole scavenging agents. In this work, we developed a class of energy-storage quasi-planar heterojunctions (WO3-Nb2O5-ZnIn2S4) with directional paths (low onset potential and well-matched energy band) and embedded morphology. The co-design of embedded and directional paths reduces the carrier transport energy barrier at the composite interface, and increases the interface contact area, thereby achieving highly stable and sensitive dark-state energy storage and photoelectrochemical cathodic protection performance in 3.5 wt. % NaCl solution without hole scavenging agent (Dark-state energy storage efficiency increased by 43 %. For carbon steel, the performance retention rate is 99.6 % after 500 cycles, the performance retention rate is 89 % after 5000 s).

Key words: Embedded and directed paths, Quasi-planar heterojunction, Marine environment, High stability and sensitivity, Dark-state photoelectrochemical cathodic protection