Related Experiment Video
Updated: Feb 6, 2026

Synthesis and Characterization of Fe-doped Aluminosilicate Nanotubes with Enhanced Electron Conductive Properties
Published on: November 15, 2016
Fe/N-Doped Carbon with Nearly Ordered Mesopores and Tunable Particle Sizes as Model Catalysts for Quantitative
Hongjuan Zhang1,2, Yunqi Li3, Jiacheng Zhao4
1College of Physical Science and Technology, Yangzhou University, Yangzhou, P. R. China.
Abstract:
Synthesizing MOF-derived carbons with not only tunable and uniform particle sizes but also ordered tubular mesoporous structures remains challenging. Moreover, the lack of precise morphological control makes it hard to clarify the relationships between structure and catalytic activity, limiting the rational design of MOF-derived electrocatalysts with breakthrough performance. This study successfully prepares ordered mesoporous Fe/MOF-545-x rod-shaped precursors with tunable lengths via a one-step modulation approach. After direct carbonization, Fe/MNC-x retains the rod-shape, mesoporous structures, and well-dispersed Fe-Nx active sites. Considering that the axis length is the most significant variable for the Fe/MNC-x series, they are promising model electrocatalysts to reveal the relationship between the particle size and utilization efficiency of electrocatalytic active sites in ORR. The electrochemical result shows that Fe/MNC-250 nm, which has the shortest length, displays a superior activity (E1/2 = 0.917 V in alkaline and E1/2 = 0.814 V in acidic electrolytes), due to the higher electrochemical surface area, lower charge transfer resistance, and a higher efficient active site density (1.27 ± 0.26 × 101 9 sites g- 1) estimated by in situ nitrite stripping technique. The fuel cell assembled using Fe/MNC-250 nm possesses an excellent power density of 521.16 mW cm- 2. This work provides a simple strategy for regulating the particle sizes of ordered mesoporous MOF precursors and the derived carbon-based electrocatalysts for high-performance PEMFCs.
More Related Videos
Related Concept Videos
Basic Postulates of Kinetic Molecular Theory: Particle Size, Energy, and Collision
Precipitate Formation and Particle Size Control
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
Factors Affecting Dissolution: Particle Size and Effective Surface Area
Conserved Binding Sites
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
Subatomic Particles
Ligand Binding Sites
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...

