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Updated: Feb 19, 2026

Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
Hydrogen Evolution by FeIII Molecular Electrocatalysts Interconverting between Mono and Di-Nuclear Structures in
Mirko Tagliapietra1, Andrea Squarcina1, Neal Hickey2
1Department of Chemical Sciences, ITM-CNR University of Padova, Via Marzolo 1, 35131, Padova, Italy.
Abstract:
A new FeL/Fe2 L2 manifold, with HL=2-({[di(2-pyridyl)methyl](methyl)amino}methyl)phenol, was prepared in gram scale (>50 % yield) and characterized in solution and solid state. The monomer/dimer interconversion is controlled in aqueous phase, upon varying the pH conditions. The electrocatalytic hydrogen evolution reaction (HER) occurs through the FeL monomer with added trifluoroacetic acid (TFA) and through the Fe2 L2 μ-oxo dimer in acetate buffer (pH 4.9), with an overpotential of about 1 V and faradaic yield up to 75 %. The resulting icat /ip values in the range 15-28 are among the highest reported for Fe-based electrocatalysts (icat is the catalytic current, whereas ip is the current of an Fe-based redox event).
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