Schuch, Jona ; Klemenz, Sebastian ; Schuldt, Patrick ; Zieschang, Anne‐Marie ; Dolique, Stephanie ; Connor, Paula ; Kaiser, Bernhard ; Kramm, Ulrike I. ; Albert, Barbara ; Jaegermann, Wolfram (2023)
Efficient Oxygen Evolution Electrocatalyst by Incorporation of Nickel into Nanoscale Dicobalt Boride.
In: ChemCatChem, 2021, 13 (7)
doi: 10.26083/tuprints-00020150
Artikel, Zweitveröffentlichung, Verlagsversion

Kurzbeschreibung (Abstract)

Recently, transition metal borides attracted increased attention as electrocatalysts for the oxygen evolution reaction. Here, we show how the incorporation of nickel into nanoscale dicobalt boride results in an improvement of the activity and stability of the catalyst in alkaline electrolytes. The borides are obtained by a one‐step solution synthesis, calcined, and characterized by X‐ray diffraction and scanning electron microscopy. For (Co₁₋ₓNiₓ)₂B (x=0, 0.1, 0.2, 0.3, 0.4, and 0.5), (Co₀.₉Ni₀.₁)₂B shows the best performance with an overpotential of η=371 mV at 10 mA cm⁻² in 1 M KOH. Normalization to the electrochemical surface area shows a clear dependence on the activity with rising nickel content. X‐ray photoelectron spectroscopy reveals that the catalyst is modified under reaction conditions and indicates that CoOOH and Ni(OH)₂ are formed as active surface species. Flame atomic absorption spectroscopy (F‐AAS) measurements show that no cobalt is dissolved during the electrochemical investigations, but the nickel concentration is increased on the surface of the catalyst as follows from XPS measurements after the electrochemical investigation.

Typ des Eintrags:	Artikel
Erschienen:	2023
Autor(en):	Schuch, Jona ; Klemenz, Sebastian ; Schuldt, Patrick ; Zieschang, Anne‐Marie ; Dolique, Stephanie ; Connor, Paula ; Kaiser, Bernhard ; Kramm, Ulrike I. ; Albert, Barbara ; Jaegermann, Wolfram
Art des Eintrags:	Zweitveröffentlichung
Titel:	Efficient Oxygen Evolution Electrocatalyst by Incorporation of Nickel into Nanoscale Dicobalt Boride
Sprache:	Englisch
Publikationsjahr:	22 Dezember 2023
Ort:	Darmstadt
Publikationsdatum der Erstveröffentlichung:	2021
Ort der Erstveröffentlichung:	Weinheim
Verlag:	Wiley-VCH
Titel der Zeitschrift, Zeitung oder Schriftenreihe:	ChemCatChem
Jahrgang/Volume einer Zeitschrift:	13
(Heft-)Nummer:	7
DOI:	10.26083/tuprints-00020150
URL / URN:	https://tuprints.ulb.tu-darmstadt.de/20150
Zugehörige Links:	Verlags-DOI
Herkunft:	Zweitveröffentlichung DeepGreen
Kurzbeschreibung (Abstract):	Recently, transition metal borides attracted increased attention as electrocatalysts for the oxygen evolution reaction. Here, we show how the incorporation of nickel into nanoscale dicobalt boride results in an improvement of the activity and stability of the catalyst in alkaline electrolytes. The borides are obtained by a one‐step solution synthesis, calcined, and characterized by X‐ray diffraction and scanning electron microscopy. For (Co₁₋ₓNiₓ)₂B (x=0, 0.1, 0.2, 0.3, 0.4, and 0.5), (Co₀.₉Ni₀.₁)₂B shows the best performance with an overpotential of η=371 mV at 10 mA cm⁻² in 1 M KOH. Normalization to the electrochemical surface area shows a clear dependence on the activity with rising nickel content. X‐ray photoelectron spectroscopy reveals that the catalyst is modified under reaction conditions and indicates that CoOOH and Ni(OH)₂ are formed as active surface species. Flame atomic absorption spectroscopy (F‐AAS) measurements show that no cobalt is dissolved during the electrochemical investigations, but the nickel concentration is increased on the surface of the catalyst as follows from XPS measurements after the electrochemical investigation.
Alternatives oder übersetztes Abstract:	Alternatives Abstract Sprache Nickel (re)adsorption from electrolyte: X-ray photoelectron spectroscopy was used to investigate the surface composition of nanocrystalline (Co,Ni)B after electrochemical activation and investigation as OER catalyst. The particles form an oxide layer of changing composition: boron oxide after synthesis, OER-active CoOOH and Ni(OH)₂ after activation with an increase of Ni-species after investigation. The additional Ni is (re)adsorbed from the electrolyte during the electrochemical treatment. Englisch
Status:	Verlagsversion
URN:	urn:nbn:de:tuda-tuprints-201509
Sachgruppe der Dewey Dezimalklassifikatin (DDC):	500 Naturwissenschaften und Mathematik > 540 Chemie
Fachbereich(e)/-gebiet(e):	11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie > Fachgruppe Katalysatoren und Elektrokatalysatoren 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie
Hinterlegungsdatum:	22 Dez 2023 13:20
Letzte Änderung:	28 Dez 2023 07:31
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Zugehörige Links:	Verlags-DOI
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Verfügbare Versionen dieses Eintrags

• Efficient Oxygen Evolution Electrocatalyst by Incorporation of Nickel into Nanoscale Dicobalt Boride. (deposited 22 Dez 2023 13:20) [Gegenwärtig angezeigt]
  • Efficient Oxygen Evolution Electrocatalyst by Incorporation of Nickel into Nanoscale Dicobalt Boride. (deposited 14 Mai 2021 15:00)

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