Iron phosphide

• CAS: 1310-43-6
• Catalog Number: ACM1310436
• Category: Main Products
• Molecular Weight: 142.66
• Molecular Formula: Fe₂P
• Synonyms: diironmonophosphide;di-ironphosphide;ironphosphide(fe2p);FERROUS PHOSPHIDE;IRON (II) PHOSPHIDE;IRON PHOSPHIDE;ironphosphide99.5%(metalsbasis)-40meshpowder;Ferrousphosphide,Irondiphosphide
• IUPAC Name: Iron diphosphide
• Canonical SMILES: P(#[Fe])=[Fe]
• InChI Key: GNTCPDPNMAMZFW-UHFFFAOYSA-N
• EC Number: 215-178-7
• Exact Mass: 143.85100
• Hazard Statements: Xi: Irritant
• Safety Description: 26-36/37

Case Study

Factors Affecting the Performance of Iron Phosphide Nanoparticles as Hydrogen Evolution Reaction (HER) Electrocatalysts

Tian, Lihong, et al. ACS Catalysis, 2016, 6(8), 5441-5448.

This work demonstrated that the hydrogen evolution reaction (HER) performance of iron phosphide (FeP) nanoparticles was enhanced after stability testing, which was due to the reduction of surface charge transfer resistance during the HER process. FeP nanoparticles were obtained by one-step phosphating of α-Fe2O3 with NaH2PO2 under argon atmosphere at low temperature.
The study shows that the HER activity, surface charge transfer resistance, and electrochemically active surface area of FeP nanoparticles are largely affected by the phosphating conditions (i.e., reactant ratio and phosphating temperature).
The density of hydrogen evolution reaction (HER) current rises with a larger electrochemically active surface area (ECSA), accompanied by a reduction in overpotential, Tafel slope, and surface charge transfer resistance. Enhanced charge transfer, along with lower overpotential and Tafel slope, allows for further improvements in catalytic performance through hydrogenation.
During stability tests, the HER polarization curves show improvement due to the lowered surface charge transfer resistance. Nonetheless, the long-term performance of HER deteriorates because of restricted mass transfer close to the surface.

Performance Evaluation of Efficient Electrochemical Nitrogen Fixation of Iron Phosphide Catalysts

Rytelewska, Beata, et al. Electrochimica Acta, 2023, 471, 143360.

The catalytic system based on iron phosphide (Fe2P) exhibits electrocatalytic activity for N2 reduction reaction in alkaline medium (NaOH), which is beneficial for the conversion of N2 to NH3. In this work, Fe2P powder catalytic material was prepared by an improved solvothermal synthesis method and introduced to the surface of glassy carbon electrode by friction for a series of electrocatalytic experiments.
Performance evaluation method and results of Fe2P catalyst
· Electrochemical diagnostic experiments, including cyclic voltammetry, long-term electrolysis, and chronoamperometry, provide strong evidence for the exceptional catalytic activity of Fe2P in the electroreduction of N2 in an alkaline environment. The activity of the system is attributed to the generation of Fe0 catalytic centers that likely interact with P sites on the surfaces of Fe2P nanoparticles or their aggregates.
· Findings from Raman spectroscopy, spectrophotometry, and voltammetric stripping measurements using a Pt-based electrode suggest that, alongside hydrogen evolution, NH3 is the primary product of the reaction.
· Additionally, impedance measurements and Tafel plot analysis indicate that the kinetics of the N2 reduction reaction (N2RR), which competes with hydrogen evolution, is influenced by the applied potential. Utilizing traditional kinetic electroanalysis methods, the rate constant in heterogeneous terms has been determined to be a moderate range of 1-2*10-4 cm s-1 at -0.4 V.