Role of Boron and Phosphorus in Enhanced Electrocatalytic Oxygen Evolution by Nickel borides and Nickel Phosphides

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dc.contributor.authorMasa, Justus
dc.contributor.authorAndronescu, Corina
dc.contributor.authorAntoni, Hendrik
dc.contributor.authorSeisel, Sabine
dc.contributor.authorBarwe, Stefan
dc.contributor.authorRoldan, Beatriz Cuenya
dc.date.accessioned2022-11-16T15:35:29Z
dc.date.available2022-11-16T15:35:29Z
dc.date.issued2019
dc.description.abstractThe modification of nickel with boron or phosphorus leads to significant enhancement of its electrocatalytic activity for the oxygen evolution reaction (OER). However, the precise role of the guest elements, B and P, in enhancing the OER of the host element (Ni) remains unclear. Herein, we present insight into the role of B and P in enhancing electrocatalysis of oxygen evolution by nickel borides and nickel phosphides. The apparent activation energy, Ea*, of electrocatalytic oxygen evolution on Ni2P was 78.4 kJ/mol, on Ni2B 65.4 kJ/mol, and on Ni nanoparticles 94.0 kJ/mol, thus revealing that both B and P affect the intrinsic activity of nickel. XPS data revealed shifts of −0.30 and 0.40 eV in the binding energy of the Ni 2p3/2 peak of Ni2B and Ni2P, respectively, with respect to that of pure Ni at 852.60 eV, thus indicating that B and P induce opposite electronic effects on the surface electronic structure of Ni. The origin of enhanced activity for oxygen evolution cannot, therefore, be attributed to such electronic modification or ligand effect. Severe changes induced on the nickel lattice, specifically, the Ni-Ni atomic order and interatomic distances (strain effect), by the presence of the guest atoms seem to be the dominant factors responsible for enhanced activity of oxygen evolution in nickel borides and nickel phosphides.en_US
dc.identifier.citationMasa, J., Andronescu, C., Antoni, H., Sinev, I., Seisel, S., Elumeeva, K., ... & Schuhmann, W. (2019). Role of boron and phosphorus in enhanced electrocatalytic oxygen evolution by nickel borides and nickel phosphides. ChemElectroChem, 6(1), 235-240.https://doi.org/10.1002/celc.201800669en_US
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/5294
dc.language.isoenen_US
dc.publisherChemElectroChemen_US
dc.titleRole of Boron and Phosphorus in Enhanced Electrocatalytic Oxygen Evolution by Nickel borides and Nickel Phosphidesen_US
dc.typeArticleen_US
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