English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/200897
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Role of boron and phosphorus in enhanced electrocatalytic oxygen evolution by nickel borides and nickel phosphides

AuthorsMasa, Justus; Andronescu, Corina; Antoni, Hendrik; Sinev, Ilya; Seisel, Sabine; Elumeeva, Karina; Barwe, Stefan; Martí-Sànchez, Sara ; Arbiol, Jordi ; Roldan Cuenya, Beatriz; Muhler, Martin; Schuhmann, Wolfgang
Issue Date2019
PublisherWiley-VCH
CitationChemElectroChem 6(1): 235-240 (2019)
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.
Publisher version (URL)https://doi.org/10.1002/celc.201800669
URIhttp://hdl.handle.net/10261/200897
DOI10.1002/celc.201800669
E-ISSN2196-0216
Appears in Collections:(CIN2) Artículos
Files in This Item:
File Description SizeFormat 
rolephosphi.pdf5,99 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.