Skip to Main content Skip to Navigation
Journal articles

A Single Molecular Stoichiometric P-Source for Phase- Selective Synthesis of Crystalline and Amorphous Iron Phosphide Nanocatalysts

Abstract : The formation of iron phosphide nanoparticles (FexP) is a well‐studied process. It usually uses air‐sensitive phosphorus precursors such as n‐trioctylphosphine or white phosphorus. In this study, we report the synthesis and characterization of a remarkably stable tetrakis(acyl)cyclotetraphosphane, P4(MesCO)4. We demonstrate that this compound can be used as a stoichiometric source of P(0) species in order to synthesize FeP and Fe2P nanoparticles at only 250 °C. This tunable process provides a route to monodisperse nanoparticles with different compositions and crystallinities. We combine X‐Ray photoelectron spectroscopy and atomic pair distribution function (PDF) to study the local order and bonding in the amorphous and crystalline materials. We show that crystalline FeP forms via an intermediate amorphous phase (obtained at a lower temperature) that presents local order similar to that of the crystalline sample. We explore their electrocatalytic properties for the hydrogen evolution reaction (HER) in acidic and neutral electrolytes. In both electrolytes, amorphous FeP is a more efficient catalyst than crystalline FeP, itself more efficient than crystalline Fe2P. Our study paves the way for a more systematic investigation of amorphous metal phosphide phases in electrocatalysis. It also shows the beneficial use of PDF on the highly challenging characterization of amorphous nanomaterials.
Document type :
Journal articles
Complete list of metadatas

Cited literature [76 references]  Display  Hide  Download

https://hal.sorbonne-universite.fr/hal-02565354
Contributor : Gestionnaire Hal-Su <>
Submitted on : Wednesday, May 6, 2020 - 1:40:26 PM
Last modification on : Friday, October 30, 2020 - 2:12:02 PM

File

manuscript accepted article.pd...
Files produced by the author(s)

Identifiers

Citation

Florian D’accriscio, Erik Schrader, Capucine Sassoye, Mohamed Selmane, Rémi André, et al.. A Single Molecular Stoichiometric P-Source for Phase- Selective Synthesis of Crystalline and Amorphous Iron Phosphide Nanocatalysts. ChemNanoMat, Wiley, 2020, ⟨10.1002/cnma.202000198⟩. ⟨hal-02565354⟩

Share

Metrics

Record views

63

Files downloads

1