The development of efficient and durable electrocatalysts for the oxygen evolution reaction (OER) remains a critical challenge in advancing renewable energy technologies. As a key half-reaction in water electrolysis, the OER suffers from sluggish kinetics, necessitating high overpotentials and limiting overall efficiency. While iridium and ruthenium oxides are benchmark catalysts, their scarcity and cost hinder large-scale applications. Transition metal phosphides (TMPs), particularly cobalt-based systems, have emerged as promising alternatives due to their excellent electrical conductivity, chemical stability, and tunable electronic structures. This study presents a general, scalable strategy for synthesizing hollow CoFeM trimetallic phosphides (M = Bi, Ni, Mn, Cu, Ce, Zn) through a MOF-intermediated solvothermal method followed by low-temperature phosphorization. The resulting materials exhibit unique hollow microsphere architectures composed of ultrathin nanosheets, combining the advantages of three-dimensional hierarchical porosity and two-dimensional atomic thickness.
High-resolution transmission electron microscopy (HRTEM) and scanning electron microscopy (SEM) reveal that the hollow microspheres consist of highly porous, atomically thin nanosheets, which significantly increase the accessible surface area and expose abundant active sites. X-ray diffraction (XRD) analysis confirms the successful formation of crystalline phosphide phases, with subtle shifts in peak positions indicating lattice modulation induced by multi-metal doping. X-ray photoelectron spectroscopy (XPS) further demonstrates charge redistribution among Co, Fe, and M elements, particularly in the case of Bi-doped samples, leading to optimized adsorption energies for oxygen-containing intermediates—key factors governing OER activity. Among all tested compositions, CoFeBiP exhibits the most outstanding performance, achieving a current density of 10 mA cm⁻² at an overpotential as low as 273 mV, with a Tafel slope of only 77.3 mV dec⁻¹, outperforming both bimetallic CoFeP and commercial RuO₂. Electrochemical impedance spectroscopy (EIS) reveals faster electron transfer kinetics in CoFeBiP, consistent with its superior catalytic activity.MUC13 Antibody Cancer
The exceptional durability of CoFeBiP is confirmed via chronopotentiometry, maintaining stable performance for over 25 hours at 10 mA cm⁻².DLK1 Antibody Autophagy When paired with commercial Pt/C in a two-electrode configuration for overall water splitting, the system achieves a cell voltage of just 1.PMID:34405466 58 V at 10 mA cm⁻², demonstrating remarkable practical potential. The synergistic effects of the hollow nanostructure, ultrathin nanosheet morphology, and rational electronic structure engineering through multi-element doping collectively contribute to enhanced mass transport, improved charge transfer, and optimized intermediate binding. This work establishes a versatile synthetic platform for designing advanced trimetallic phosphide electrocatalysts and offers a clear pathway toward sustainable hydrogen production through efficient water electrolysis.MedChemExpress (MCE) offers a wide range of high-quality research chemicals and biochemicals (novel life-science reagents, reference compounds and natural compounds) for scientific use. We have professionally experienced and friendly staff to meet your needs. We are a competent and trustworthy partner for your research and scientific projects.Related websites: https://www.medchemexpress.com