Synthesis of Phase‐Pure Ferromagnetic Fe₃P Films from Single‐Source Molecular Precursors

Abstract

A new method for the preparation of phase‐pure ferromagnetic Fe3P films on quartz substrates is reported. This approach utilizes the thermal decomposition of the single‐source precursors H2Fe3(CO)9PR (R = tBu or Ph) at 400 °C. The films are deposited using a simple, home‐built metal‐organic chemical vapor deposition (MOCVD) apparatus and are characterized using a variety of analytical methods. The films exhibit excellent phase purity, as evidenced by X‐ray diffraction, X‐ray photoelectron spectroscopy, and field‐dependent magnetization measurements, the results of which agree well with measurements obtained from bulk Fe3P. Using scanning electron microscopy and atomic force microscopy techniques, the films are found to have thicknesses between 350 and 500 nm with a granular surface texture. As‐deposited Fe3P films are amorphous, and little or no magnetic hysteresis is observed in plots of magnetization versus applied field. Annealing the Fe3P films at 550 °C results in improved crystallinity as well as the observation of magnetic hysteresis.

A TiO2/FeMnP Core/Shell Nanorod Array Photoanode for Efficient Photoelectrochemical Oxygen Evolution

“…The common routes for TMPs like the solvothermal method using Pred, P4, or Na3P and metal chloride, 68 or thermal phosphidation using either in situ generated PH3 or trioctylphosphine, 69 Past work in which Fe3P, (Fe1-xCox)3P, and Fe3(P1-xTex) thin films were grown on quartz substrates by MOCVD using organometallic precursors has established a simple route to growing TMP films at mild temperature. 36,37 In the present work, we applied our method to grow a TMP film directly on a semiconductor surface. The MOCVD method employed for FeMnP demonstrates its advantageousness in the fabrication of a highly active photoanode with a semiconductor/electrocatalyst three-dimensional core/shell architecture.…”

Effects of Catalyst Phase on the Hydrogen Evolution Reaction of Water Splitting: Preparation of Phase-Pure Films of FeP, Fe2P, and Fe3P and Their Relative Catalytic Activities

“…In this way, Fe 3 P and FeMnP thin films on quartz have been obtained using H 2 Fe 3 (CO) 9 P t Bu and FeMn(CO) 8 (μ-PH 2 ) as precursors. 21,22 The method was extended to afford additional compositional variation by codecomposing isostructural precursors with varying stoichiometry. This yielded (Fe 1-…”

Bifunctional metal phosphide FeMnP films from single source metal organic chemical vapor deposition for efficient overall water splitting

“…holds promise as a scalable methodology by which binder-free electrodes can be fabricated. Recently, it has been demonstrated that mixed-metal carbonyl complexes can serve as volatile, stoichiometry-controlled single-source precursors (SSPs) for MOCVD at mild temperatures [31][32][33]. With this method, binary and ternary TMPs can be prepared by tailoring the metal elements in a single volatile precursor or by simply blending isolobal organometallic compound precursors.…”