Atomic layer deposition of cobalt phosphate thin films for the oxygen evolution reaction

V. Di Palma, G. Zafeiropoulos, T. Goldsweer, W. M.M. Kessels, M. C.M. van de Sanden, M. Creatore, M. N. Tsampas

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Electrodeposited cobalt phosphate has been reported as a valid alternative to noble metals as an electrocatalyst for the Oxygen Evolution Reaction (OER). In parallel, Atomic Layer Deposition (ALD) is increasingly being used in (photo)electrocatalytic applications. In this contribution we report on the electrocatalytic activity towards OER of ALD-prepared cobalt phosphate thin films. The selected ALD approach enables tuning of the Co-to-P atomic ratio, which is found to significantly affect the activity of the prepared electrocatalyst. Specifically, concurrently with a Co-to-P ratio increase from 1.6 to 1.9, the current density for OER increases from 1.77 mA/cm2 at 1.8 V vs. RHE (Reversible Hydrogen Electrode) to 2.89 mA/cm2 at 1.8 V vs. RHE. Moreover the sample with a Co-to-P ratio of 1.9 has superior performance when compared to electrodeposited cobalt phosphate thin films reported in the literature.

LanguageEnglish
Pages73-77
Number of pages5
JournalElectrochemistry Communications
Volume98
DOIs
StatePublished - 1 Jan 2019

Fingerprint

Atomic layer deposition
Cobalt
Phosphates
Electrocatalysts
Oxygen
Thin films
Hydrogen
Electrodes
Precious metals
Current density
Tuning

Keywords

  • Atomic layer deposition
  • Cobalt phosphate
  • Electrocatalysis
  • Oxygen evolution reaction

Cite this

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title = "Atomic layer deposition of cobalt phosphate thin films for the oxygen evolution reaction",
abstract = "Electrodeposited cobalt phosphate has been reported as a valid alternative to noble metals as an electrocatalyst for the Oxygen Evolution Reaction (OER). In parallel, Atomic Layer Deposition (ALD) is increasingly being used in (photo)electrocatalytic applications. In this contribution we report on the electrocatalytic activity towards OER of ALD-prepared cobalt phosphate thin films. The selected ALD approach enables tuning of the Co-to-P atomic ratio, which is found to significantly affect the activity of the prepared electrocatalyst. Specifically, concurrently with a Co-to-P ratio increase from 1.6 to 1.9, the current density for OER increases from 1.77 mA/cm2 at 1.8 V vs. RHE (Reversible Hydrogen Electrode) to 2.89 mA/cm2 at 1.8 V vs. RHE. Moreover the sample with a Co-to-P ratio of 1.9 has superior performance when compared to electrodeposited cobalt phosphate thin films reported in the literature.",
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Atomic layer deposition of cobalt phosphate thin films for the oxygen evolution reaction. / Di Palma, V.; Zafeiropoulos, G.; Goldsweer, T.; Kessels, W. M.M.; van de Sanden, M. C.M.; Creatore, M.; Tsampas, M. N.

In: Electrochemistry Communications, Vol. 98, 01.01.2019, p. 73-77.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Zafeiropoulos,G.

AU - Goldsweer,T.

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AU - van de Sanden,M. C.M.

AU - Creatore,M.

AU - Tsampas,M. N.

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AB - Electrodeposited cobalt phosphate has been reported as a valid alternative to noble metals as an electrocatalyst for the Oxygen Evolution Reaction (OER). In parallel, Atomic Layer Deposition (ALD) is increasingly being used in (photo)electrocatalytic applications. In this contribution we report on the electrocatalytic activity towards OER of ALD-prepared cobalt phosphate thin films. The selected ALD approach enables tuning of the Co-to-P atomic ratio, which is found to significantly affect the activity of the prepared electrocatalyst. Specifically, concurrently with a Co-to-P ratio increase from 1.6 to 1.9, the current density for OER increases from 1.77 mA/cm2 at 1.8 V vs. RHE (Reversible Hydrogen Electrode) to 2.89 mA/cm2 at 1.8 V vs. RHE. Moreover the sample with a Co-to-P ratio of 1.9 has superior performance when compared to electrodeposited cobalt phosphate thin films reported in the literature.

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