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High-performance hydrogen evolution reaction catalysis achieved by small core-shell copper nanoparticles.

08:00 EDT 6th May 2019 | BioPortfolio

Summary of "High-performance hydrogen evolution reaction catalysis achieved by small core-shell copper nanoparticles."

In this work, we reported a comprehensive first-principles study on the hydrogen evolution reaction (HER) catalytic activity of Cu based core-shell nanoparticles (CSNPs). Cu nanoparticle (NP) and M@Cu CSNPs (x = 1, 13) with Fe, Ru, and Os as core components were constructed and their structural parameters, stability, and electronic properties were calculated. We found that there exist competing effects during the binding of H atom on the NP surface. The competing effects between the decreasing of negative charge on surface Cu atoms and the surface expansion resulted from the change of core port size and atoms affect hydrogen adsorption oppositely. Among these CSNPs, Os@Cu exhibited the best HER catalytic performance with moderate adsorption for H atoms (E = -0.20 eV), low Gibbs free energies of hydrogen adsorption (ΔG = 0.03 eV) and acceptable reaction barrier for H generation (E = 0.32 eV), which makes it highly promising as HER electro-catalyst.

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Journal Details

This article was published in the following journal.

Name: Journal of colloid and interface science
ISSN: 1095-7103
Pages: 130-137

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