Comparison between Fe2O3/C and Fe3C/Fe2O3/Fe/C Electrocatalysts for N2Reduction in an Alkaline Electrolyte

Ji Hye Kim; Hyung Kuk Ju; Byeong Seon An; Yena An; Kanghee Cho; Sun Hyung Kim; Youn Sang Bae; Hyung Chul Yoon

doi:10.1021/acsami.1c20807

Comparison between Fe₂O₃/C and Fe₃C/Fe₂O₃/Fe/C Electrocatalysts for N₂Reduction in an Alkaline Electrolyte

Ji Hye Kim, Hyung Kuk Ju, Byeong Seon An, Yena An, Kanghee Cho, Sun Hyung Kim, Youn Sang Bae, Hyung Chul Yoon

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Cost-effective and nonprecious iron-based catalysts were synthesized, evaluated, and compared for electrocatalytic N2 reduction reaction (NRR) under alkaline conditions in the potential range from-0.4 to 0.1 V [vs reversible hydrogen electrode (RHE)] at low temperature (≤60 °C) and atmospheric pressure. The tested H-type cell was separated by an anion exchange membrane in 6 M KOH alkaline electrolyte (pH = over 14) in order to minimize hydrogen evolution reaction and to directly form NH3 gas. The amount of ammonia synthesized was quantified using an indophenol blue method and cross-checked with 1H nuclear magnetic resonance spectroscopy and ion chromatography using both 14N2 and 15N2 gases. Because of the synergistic effect between the Fe3C, Fe2O3, and Fe composites in the NRR, both the ammonia formation rate and faradaic efficiency in Fe3C/Fe2O3/Fe/C were approximately fourfold higher than those in Fe2O3/C at 60 °C and 0.1 V (vs RHE). These results can provide insights into designing Fe-based electrocatalysts for NRR at atmospheric pressure.

Original language	English
Pages (from-to)	61316-61323
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	13
Issue number	51
DOIs	https://doi.org/10.1021/acsami.1c20807
Publication status	Published - 2021 Dec 29

Bibliographical note

Funding Information:
This work was conducted under the framework of the Research and Development Program of the Korea Institute of Energy Research (KIER) (C1-2413). This work was also supported by the Alchemist Project (20012383, Technical development of hydrogen production from green ammonia) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).

Publisher Copyright:
© 2021 American Chemical Society.

All Science Journal Classification (ASJC) codes

Materials Science(all)

Access to Document

10.1021/acsami.1c20807

Cite this

@article{cafddf4d1e6346ceb9140f0d6f65b719,

title = "Comparison between Fe2O3/C and Fe3C/Fe2O3/Fe/C Electrocatalysts for N2Reduction in an Alkaline Electrolyte",

abstract = "Cost-effective and nonprecious iron-based catalysts were synthesized, evaluated, and compared for electrocatalytic N2 reduction reaction (NRR) under alkaline conditions in the potential range from-0.4 to 0.1 V [vs reversible hydrogen electrode (RHE)] at low temperature (≤60 °C) and atmospheric pressure. The tested H-type cell was separated by an anion exchange membrane in 6 M KOH alkaline electrolyte (pH = over 14) in order to minimize hydrogen evolution reaction and to directly form NH3 gas. The amount of ammonia synthesized was quantified using an indophenol blue method and cross-checked with 1H nuclear magnetic resonance spectroscopy and ion chromatography using both 14N2 and 15N2 gases. Because of the synergistic effect between the Fe3C, Fe2O3, and Fe composites in the NRR, both the ammonia formation rate and faradaic efficiency in Fe3C/Fe2O3/Fe/C were approximately fourfold higher than those in Fe2O3/C at 60 °C and 0.1 V (vs RHE). These results can provide insights into designing Fe-based electrocatalysts for NRR at atmospheric pressure.",

author = "Kim, {Ji Hye} and Ju, {Hyung Kuk} and An, {Byeong Seon} and Yena An and Kanghee Cho and Kim, {Sun Hyung} and Bae, {Youn Sang} and Yoon, {Hyung Chul}",

note = "Funding Information: This work was conducted under the framework of the Research and Development Program of the Korea Institute of Energy Research (KIER) (C1-2413). This work was also supported by the Alchemist Project (20012383, Technical development of hydrogen production from green ammonia) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea). Publisher Copyright: {\textcopyright} 2021 American Chemical Society.",

year = "2021",

month = dec,

day = "29",

doi = "10.1021/acsami.1c20807",

language = "English",

volume = "13",

pages = "61316--61323",

journal = "ACS applied materials & interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

number = "51",

}

TY - JOUR

T1 - Comparison between Fe2O3/C and Fe3C/Fe2O3/Fe/C Electrocatalysts for N2Reduction in an Alkaline Electrolyte

AU - Kim, Ji Hye

AU - Ju, Hyung Kuk

AU - An, Byeong Seon

AU - An, Yena

AU - Cho, Kanghee

AU - Kim, Sun Hyung

AU - Bae, Youn Sang

AU - Yoon, Hyung Chul

N1 - Funding Information: This work was conducted under the framework of the Research and Development Program of the Korea Institute of Energy Research (KIER) (C1-2413). This work was also supported by the Alchemist Project (20012383, Technical development of hydrogen production from green ammonia) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea). Publisher Copyright: © 2021 American Chemical Society.

PY - 2021/12/29

Y1 - 2021/12/29

N2 - Cost-effective and nonprecious iron-based catalysts were synthesized, evaluated, and compared for electrocatalytic N2 reduction reaction (NRR) under alkaline conditions in the potential range from-0.4 to 0.1 V [vs reversible hydrogen electrode (RHE)] at low temperature (≤60 °C) and atmospheric pressure. The tested H-type cell was separated by an anion exchange membrane in 6 M KOH alkaline electrolyte (pH = over 14) in order to minimize hydrogen evolution reaction and to directly form NH3 gas. The amount of ammonia synthesized was quantified using an indophenol blue method and cross-checked with 1H nuclear magnetic resonance spectroscopy and ion chromatography using both 14N2 and 15N2 gases. Because of the synergistic effect between the Fe3C, Fe2O3, and Fe composites in the NRR, both the ammonia formation rate and faradaic efficiency in Fe3C/Fe2O3/Fe/C were approximately fourfold higher than those in Fe2O3/C at 60 °C and 0.1 V (vs RHE). These results can provide insights into designing Fe-based electrocatalysts for NRR at atmospheric pressure.

AB - Cost-effective and nonprecious iron-based catalysts were synthesized, evaluated, and compared for electrocatalytic N2 reduction reaction (NRR) under alkaline conditions in the potential range from-0.4 to 0.1 V [vs reversible hydrogen electrode (RHE)] at low temperature (≤60 °C) and atmospheric pressure. The tested H-type cell was separated by an anion exchange membrane in 6 M KOH alkaline electrolyte (pH = over 14) in order to minimize hydrogen evolution reaction and to directly form NH3 gas. The amount of ammonia synthesized was quantified using an indophenol blue method and cross-checked with 1H nuclear magnetic resonance spectroscopy and ion chromatography using both 14N2 and 15N2 gases. Because of the synergistic effect between the Fe3C, Fe2O3, and Fe composites in the NRR, both the ammonia formation rate and faradaic efficiency in Fe3C/Fe2O3/Fe/C were approximately fourfold higher than those in Fe2O3/C at 60 °C and 0.1 V (vs RHE). These results can provide insights into designing Fe-based electrocatalysts for NRR at atmospheric pressure.

UR - http://www.scopus.com/inward/record.url?scp=85121976912&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85121976912&partnerID=8YFLogxK

U2 - 10.1021/acsami.1c20807

DO - 10.1021/acsami.1c20807

M3 - Article

C2 - 34918900

AN - SCOPUS:85121976912

SN - 1944-8244

VL - 13

SP - 61316

EP - 61323

JO - ACS applied materials & interfaces

JF - ACS applied materials & interfaces

IS - 51

ER -