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Electroless plated Ni-Bx films as highly active electrocatalysts for hydrogen production from water over a wide pH range
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2016 (English)In: Nano Energy, ISSN 2211-2855, Vol. 19, 98-107 p.Article in journal (Refereed) PublishedText
Abstract [en]

The performance of electroless plated Ni-Bx films was studied in a wide pH range for the hydrogen evolution reaction (HER). The atomic ratio of B to Ni has great influence on the particle size and the morphology of Ni-Bx materials, and more importantly on the catalytic H2-evolution property of Ni-Bx films. The film with a B:Ni atomic ratio of 0.54, denoted as Ni-B0.54, displayed the best performance with a current density of 10mAcm-2 at very low overpotentials (η) of 45mV in 0.5M H2SO4, 54mV in 1.0M pH 7 phosphate buffer solution (PBS), and 135mV in 1.0M KOH, and the catalytic activity maintained over 20-h electrolysis at η=100mV in all tested media of different pH values. The Tafel slopes of the Ni-B0.54 film are 43, 77, and 88 mV dec-1 in 0.5 M H2SO4, 1.0 M neutral PBS, and 1.0 M KOH, respectively. These results show that the combination of earth-abundant nickel and boron elements in an optimal B-to-Ni atomic ratio can provide highly active and stable electrocatalysts for the HER over a wide pH range.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 19, 98-107 p.
Keyword [en]
EleElectrocatalysis, Hydrogen, evolution reaction, Nickel nanocrystals, Nickel-boride alloy
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-181458DOI: 10.1016/j.nanoen.2015.11.020ISI: 000369565400011ScopusID: 2-s2.0-84949195153OAI: oai:DiVA.org:kth-181458DiVA: diva2:900134
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note

QC 20160203. QC 20160304

Available from: 2016-02-03 Created: 2016-02-02 Last updated: 2016-03-04Bibliographically approved

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