One-Pot Synthesis of CoS2 Merged in Polymeric Carbon Nitride Films for Photoelectrochemical Water Splitting

Xiaochun Li, Jiawen Wang, Jiawei Xia, Yuanxing Fang, Yidong Hou, Xianzhi Fu, Menny Shalom, Xinchen Wang

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Polymeric carbon nitride (PCN) has attracted intensive interest as sustainable, metal-free semiconductor for photoelectrochemical (PEC) water splitting. Charge transfer along the films acts as the main concern to restrict the performance due to the amorphous nature of polymer. Herein, gradient concentration of cobalt disulfide (CoS2) merged in PCN films was realized as CSCN photoanode by a one-pot synthesis. Owing to the unique properties of CoS2, namely high conductivity, the charge transfer of the CSCN photoanode was promoted, and thus the performance for PEC water oxidation was improved. The optimal photoanode exhibited a photoanodic current of 200 μA cm−2 at 1.23 V versus reversible hydrogen electrode under air mass 1.5 global (AM 1.5G) illumination, which was approximately 4 times that of the pristine PCN photoanode. This work provides a new design of metal-free photoanodes to improve the performance of water splitting.

Original languageEnglish
Article numbere202200330
JournalChemSusChem
Volume15
Issue number8
DOIs
StatePublished - 22 Apr 2022

Keywords

  • carbon nitride
  • charge transfer
  • cobalt disulfide
  • photocatalysis
  • water splitting

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemical Engineering (all)
  • Materials Science (all)
  • Energy (all)

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