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Optimal preparation of molybdenum phosphide cocatalyst for efficient dye-sensitized photocatalytic hydrogen evolution.
- Source :
-
International Journal of Hydrogen Energy . Jan2022, Vol. 47 Issue 6, p3814-3823. 10p. - Publication Year :
- 2022
-
Abstract
- Searching for non-noble-metal cocatalyst for hydrogen evolution in photocatalytic water–splitting has attracted much attention. Herein, molybdenum phosphide (MoP) as an efficient and stable cocatalyst was prepared in a facile phosphorization process at relatively low temperatures under N 2 atmosphere, and the effect of preparation temperature (300–500 °C) was studied. Using Eosin Y (EY) and the prepared sample as catalyst (sensitizer) and cocatalyst, respectively, the photocatalytic activity for hydrogen evolution was investigated in aqueous trimethylamine (TMA) solution under visible light irradiation (λ ≥ 420 nm). MoP prepared at 400 °C (MoP-400) exhibits the highest sensitization activity and superior stability, and the maximal apparent quantum yield (AQY) for hydrogen evolution is up to 48.0% at 420 nm, much higher than the most reported data for MoP-based photocatalysts. The highest activity can be attributed to the highest P content in MoP-400 and the rapidest electron transfer between photoexcited EY and MoP-400. The possible mechanism was discussed. [Display omitted] • Molybdenum phosphide (MoP) as a cocatalyst for EY-sensitized photocatalytic HER. • The effect of preparation temperature of MoP was studied. • MoP-400 exhibits the highest sensitization activity and superior stability. • The possible mechanism for EY-sensitized photocatalytic HER was proposed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 47
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 154661910
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2021.11.027