Molybdenum phosphide coupled with highly dispersed nickel confined in porous carbon nanofibers for enhanced photocatalytic CO₂ reduction

Shuaiqi GONG, Mengjie HOU, Yanli NIU, Xue TENG, Xuan LIU, Mingze XU, Chen XU, Ka Man Vonika AU, Zuofeng CHEN

Research output: Contribution to journalArticlespeer-review

Abstract

Photoreduction of CO2 to chemical fuels offers a promising strategy for managing the global carbon balance using renewable solar energy. However, the decisive process of oriented photogenerated electron delivery presents a considerable challenge. The performance of most transition metal compounds, as photocatalysts for CO2 reduction, is largely limited by their inherent stacked structure, poor conductivity, and fast recombination of photogenerated electron-hole pairs. Herein, we report the construction of porous nitrogen-doped carbon nanofibers (NCPF) with highly dispersed Ni and molybdenum phosphide nanoparticles (Ni-MoP@NCPF) loaded for photocatalytic CO2 reduction. The porous carbon nanofibers with high conductivity and open ends can effectively promote charge/mass transfer and improve CO2 adsorption. The loaded Ni species exist at a highly dispersed state that are stabilized by formation of coordinating Ni-N bonds with N from pyrrolic nitrogen in NCPF. The incorporation of Ni and its electronic coupling with MoP can adjust the band structure of the resultant material and alter the transfer route of the photogenerated carriers. The Ni-MoP@NCPF exhibits a CO product selectivity up to 98.95% with a rate of 953.33 μmol g−1h−1 under visible light irradiation, which is 9.37 times faster than that of Ni-free MoP@NCPF. These findings provide new insights into photocatalytic CO2 reduction on cost-effective transition metal compounds through combined morphology, composition, and heterointerface engineering. Copyright © 2021 Elsevier B.V. All rights reserved.

Original languageEnglish
Article number131717
JournalChemical Engineering Journal
Volume427
Early online dateAug 2021
DOIs
Publication statusE-pub ahead of print - Aug 2021

Citation

Gong, S., Hou, M., Niu, Y., Teng, X., Liu, X., Xu, M., . . . Chen, Z. (2021). Molybdenum phosphide coupled with highly dispersed nickel confined in porous carbon nanofibers for enhanced photocatalytic CO₂ reduction. Chemical Engineering Journal, 427. Retrieved from https://doi.org/10.1016/j.cej.2021.131717

Keywords

  • Dispersed Ni
  • MoP
  • Electrospinning
  • Carbon nanofibers
  • Photocatalytic CO₂ reduction
  • High selectivity

Fingerprint

Dive into the research topics of 'Molybdenum phosphide coupled with highly dispersed nickel confined in porous carbon nanofibers for enhanced photocatalytic CO₂ reduction'. Together they form a unique fingerprint.