Related Experiment Video
Updated: May 22, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Understanding the Mechanism of Fe-N-C Catalyst Oxygen Reduction Reaction Performance Enhancement: The Impact of Iron
Yudong Zhang1,2,3, Yuan He1, Jun Li1
1Institute of Engineering Thermophysics, School of Energy and Powering Engineering, Chongqing University, Chongqing 400030, China.
Abstract:
Optimizing non-noble catalysts for the oxygen reduction reaction (ORR) is crucial for advancing energy storage and conversion technologies. This study investigates the influence of iron valence states and nitrogen precursor contents on the physicochemical properties and electrochemical performance of lignin-based Fe-N-C catalysts. Catalysts are synthesized using different valence iron sources and varying pyrrole contents. The results reveal that iron(II) doping increases microporosity and specific surface area, while iron(III) doping enhances mesoporous and iron contents of the carbon materials. XPS and Raman spectroscopy confirm the successful incorporation of Fe-N active sites in the as-prepared LFeIIIP catalysts. Electrochemical tests demonstrate that LFeIIIP10 exhibits the highest ORR activity, surpassing commercial Pt/C in half-wave potential (E1/2) and limiting current density (JL). The direct formate fuel cell (DFFC) with an LFeIIIP10 air cathode achieves a maximum power density of 24.7 mW cm-2, 32% higher than that with a Pt/C cathode. This study highlights the critical role of tailoring iron valence states and nitrogen levels to develop high ORR performance, cost-effective Fe-N-C catalysts, providing valuable insights for the future design of non-noble metal catalysts in energy applications.
More Related Videos
09:02Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
Published on: April 27, 2018
08:40Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
Related Concept Videos
Catalysis
Introduction to Mechanisms of Enzyme Catalysis
Preparation of Amines: Reduction of Oximes and Nitro Compounds
Though catalytic hydrogenation can reduce nitrobenzenes, the reduction is nonselective in the presence of other functional groups. For instance, if nitrobenzene contains an aldehyde group,...
Reduction of Alkenes: Catalytic Hydrogenation
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...