Designing charge transfer route at the interface between WP nanoparticle and g-C3N4 for highly enhanced photocatalytic CO2 reduction reaction

Xiandi Zhang, Jia Yan, Fangyuan Zheng, Jiong Zhao, Lawrence Yoon Suk Lee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)

Abstract

Developing metallic co-catalysts is an effective way to enhance the photocatalytic activity of semiconductor by forming the Schottky junction, but it remains challenging to unveil the design principle. Herein, a novel nanocomposite is prepared by coupling ultra-small WP nanoparticles embedded on N-doped carbon (WP–NC) with 2D graphitic C3N4 (g-C3N4). The WP–NC and g-C3N4 form an intimate interface via PN– chemical bonds at atomic level, which facilitates the flow of photoexcited electrons from g-C3N4 to WP–NC. Moreover, the Schottky junction formed at the interface can prevent the charge-carrier recombination in the WP–NC/g-C3N4 composite and thus significantly enhance the photocatalytic CO production rate from 29 (bare g-C3N4) to 376 μmol g−1 h−1. As the first example of WP applied on the photocatalytic CO2 reduction, this work demonstrates the potential of metallic WP as a co-catalyst in photocatalysis and provides a useful guide on the phosphide-based material designing.

Original languageEnglish
Article number119879
JournalApplied Catalysis B: Environmental
Volume286
DOIs
Publication statusPublished - 5 Jun 2021

Keywords

  • CO reduction reaction
  • Interfacial charge transfer
  • Photocatalysis
  • P–N bond
  • Schottky effect

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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