Origin of Electrocatalytic Activity in Amorphous Nickel-Metalloid Electrodeposits

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

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Origin of Electrocatalytic Activity in Amorphous Nickel-Metalloid Electrodeposits. / Sarac, Baran; Karazehir, Tolga; Micusik, Matej et al.
in: ACS Applied Materials and Interfaces, Jahrgang 13.2021, Nr. 20, 26.05.2021, S. 23689-23701.

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

Harvard

Sarac, B, Karazehir, T, Micusik, M, Halkali, C, Gutnik, D, Omastova, M, Sarac, AS & Eckert, J 2021, 'Origin of Electrocatalytic Activity in Amorphous Nickel-Metalloid Electrodeposits', ACS Applied Materials and Interfaces, Jg. 13.2021, Nr. 20, S. 23689-23701. https://doi.org/10.1021/acsami.1c03007

APA

Sarac, B., Karazehir, T., Micusik, M., Halkali, C., Gutnik, D., Omastova, M., Sarac, A. S., & Eckert, J. (2021). Origin of Electrocatalytic Activity in Amorphous Nickel-Metalloid Electrodeposits. ACS Applied Materials and Interfaces, 13.2021(20), 23689-23701. https://doi.org/10.1021/acsami.1c03007

Vancouver

Sarac B, Karazehir T, Micusik M, Halkali C, Gutnik D, Omastova M et al. Origin of Electrocatalytic Activity in Amorphous Nickel-Metalloid Electrodeposits. ACS Applied Materials and Interfaces. 2021 Mai 26;13.2021(20):23689-23701. Epub 2021 Mai 13. doi: 10.1021/acsami.1c03007

Author

Sarac, Baran ; Karazehir, Tolga ; Micusik, Matej et al. / Origin of Electrocatalytic Activity in Amorphous Nickel-Metalloid Electrodeposits. in: ACS Applied Materials and Interfaces. 2021 ; Jahrgang 13.2021, Nr. 20. S. 23689-23701.

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@article{42b8a5c2c83a4fb48c2586a1f8ab9e5f,
title = "Origin of Electrocatalytic Activity in Amorphous Nickel-Metalloid Electrodeposits",
abstract = "In transition metal-based alloys, the nonlinearity of the current at large cathodic potentials reduces the credibility of the linear Tafel slopes for the evaluation of electrocatalytic hydrogen activity. High-precision nonlinear fitting at low current densities describing the kinetics of electrochemical reactions due to charge transfer can overcome this challenge. To show its effectiveness, we introduce a glassy alloy with a highly asymmetric energy barrier: amorphous NiP electrocoatings (with different C and O inclusions) via changing the applied DC and pulsed current and NaH2PO2 content. The highest hydrogen evolution reaction (HER) activity with the lowest cathodic transfer coefficient α = 0.130 with high J0 = −1.07 mA cm–2 and the largest surface areas without any porosity are observed for the pulsed current deposition. The calculated α has a direct relation with morphology, composition, chemical state and coating thickness defined by the electrodeposition conditions. Here, a general evaluation criterion with practicality in assessment and high accuracy for electrocatalytic reactions applicable to different metallic alloy systems is presented.",
keywords = "amorphous alloys, Butler-Volmer equation, electrodeposition, energy-dispersive X-ray analysis, linear sweep voltammetry, morphology, nickel phosphide, Raman spectroscopy",
author = "Baran Sarac and Tolga Karazehir and Matej Micusik and Celine Halkali and Dominik Gutnik and Maria Omastova and Sarac, {A. Sezai} and J{\"u}rgen Eckert",
note = "Publisher Copyright: {\textcopyright} 2021 American Chemical Society.",
year = "2021",
month = may,
day = "26",
doi = "10.1021/acsami.1c03007",
language = "English",
volume = "13.2021",
pages = "23689--23701",
journal = "ACS Applied Materials and Interfaces",
issn = "1944-8244",
publisher = "American Chemical Society",
number = "20",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Origin of Electrocatalytic Activity in Amorphous Nickel-Metalloid Electrodeposits

AU - Sarac, Baran

AU - Karazehir, Tolga

AU - Micusik, Matej

AU - Halkali, Celine

AU - Gutnik, Dominik

AU - Omastova, Maria

AU - Sarac, A. Sezai

AU - Eckert, Jürgen

N1 - Publisher Copyright: © 2021 American Chemical Society.

PY - 2021/5/26

Y1 - 2021/5/26

N2 - In transition metal-based alloys, the nonlinearity of the current at large cathodic potentials reduces the credibility of the linear Tafel slopes for the evaluation of electrocatalytic hydrogen activity. High-precision nonlinear fitting at low current densities describing the kinetics of electrochemical reactions due to charge transfer can overcome this challenge. To show its effectiveness, we introduce a glassy alloy with a highly asymmetric energy barrier: amorphous NiP electrocoatings (with different C and O inclusions) via changing the applied DC and pulsed current and NaH2PO2 content. The highest hydrogen evolution reaction (HER) activity with the lowest cathodic transfer coefficient α = 0.130 with high J0 = −1.07 mA cm–2 and the largest surface areas without any porosity are observed for the pulsed current deposition. The calculated α has a direct relation with morphology, composition, chemical state and coating thickness defined by the electrodeposition conditions. Here, a general evaluation criterion with practicality in assessment and high accuracy for electrocatalytic reactions applicable to different metallic alloy systems is presented.

AB - In transition metal-based alloys, the nonlinearity of the current at large cathodic potentials reduces the credibility of the linear Tafel slopes for the evaluation of electrocatalytic hydrogen activity. High-precision nonlinear fitting at low current densities describing the kinetics of electrochemical reactions due to charge transfer can overcome this challenge. To show its effectiveness, we introduce a glassy alloy with a highly asymmetric energy barrier: amorphous NiP electrocoatings (with different C and O inclusions) via changing the applied DC and pulsed current and NaH2PO2 content. The highest hydrogen evolution reaction (HER) activity with the lowest cathodic transfer coefficient α = 0.130 with high J0 = −1.07 mA cm–2 and the largest surface areas without any porosity are observed for the pulsed current deposition. The calculated α has a direct relation with morphology, composition, chemical state and coating thickness defined by the electrodeposition conditions. Here, a general evaluation criterion with practicality in assessment and high accuracy for electrocatalytic reactions applicable to different metallic alloy systems is presented.

KW - amorphous alloys

KW - Butler-Volmer equation

KW - electrodeposition

KW - energy-dispersive X-ray analysis

KW - linear sweep voltammetry

KW - morphology

KW - nickel phosphide

KW - Raman spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85106365122&partnerID=8YFLogxK

U2 - 10.1021/acsami.1c03007

DO - 10.1021/acsami.1c03007

M3 - Article

C2 - 33982559

AN - SCOPUS:85106365122

VL - 13.2021

SP - 23689

EP - 23701

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

SN - 1944-8244

IS - 20

ER -