What is it about?
When the hydrogen evolution reaction (HER) is considered, an additional and often neglected detail of mass transport in liquid is the evolution and transport of gaseous H2, since HER leads to the continuous formation of H2 bubbles near the electrode. We present a numerical model that includes the transport of both gaseous and dissolved H2, as well as mass exchange between them, and combine it with a kinetic model of HER at platinum (Pt) nanoparticle electrodes.
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Why is it important?
With electrocatalysts it is important to be able to distinguish between the effects of mass transport and reaction kinetics on the performance of the catalyst.
Perspectives
Nanoparticle catalyst loading for hydrogen evolution reaction: At low current densities mass transport in electrolyte appears similar to diffusion. At high current densities transport is enhanced by H2 transfer to bubbles.
Professor Peter D. Lund
Aalto University
Read the Original
This page is a summary of: Two-phase model of hydrogen transport to optimize nanoparticle catalyst loading for hydrogen evolution reaction, International Journal of Hydrogen Energy, May 2016, Elsevier,
DOI: 10.1016/j.ijhydene.2015.12.207.
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