Effect of Fe on high performing nanostructured Ni/Gd-doped ceria electrocatalysts

Søren Bredmose Simonsen*, Thuy Thanh Muhl, Karl Tor Sune Thydén, Christodoulos Chatzichristodoulou, Jimmi Nielsen, Bhaskar Reddy Sudireddy

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Metal supported solid oxide fuel and electrolysis cells (SOFC/SOEC) impregnated with nanosized catalysts are attractive as highly efficient low cost cells operating at relatively low temperature. Recent studies have focused on catalysts based on Ni and gadolinia-doped ceria (CGO) at the fuel side of the cell, and in some cases with the addition of Fe. Here we investigate FeNi/CGO catalyst in relation to SOFC/SOEC fuel electrodes with focus on the Fe diffusion into Ni/CGO during catalyst reduction. The reduction process was followed by in-situ XRD and in situ TEM, and the experiments show that for low metal loadings the CGO nanoparticle size is unaffected by the presence of metals. However, for a high Fe loading the oxide particle size increases and Fe is widely spread in the catalyst, both, in the form of NiFe alloy and by converting most of the CGO to CeFeO3 and GdFeO3.
Original languageEnglish
Article number115019
JournalSolid State Ionics
Volume340
Number of pages6
ISSN0167-2738
DOIs
Publication statusPublished - 2019

Keywords

  • SOEC
  • SOFC
  • Gd-doped ceria
  • CeFeO3

Cite this

@article{30479b8a62154628aae081faac6a21b5,
title = "Effect of Fe on high performing nanostructured Ni/Gd-doped ceria electrocatalysts",
abstract = "Metal supported solid oxide fuel and electrolysis cells (SOFC/SOEC) impregnated with nanosized catalysts are attractive as highly efficient low cost cells operating at relatively low temperature. Recent studies have focused on catalysts based on Ni and gadolinia-doped ceria (CGO) at the fuel side of the cell, and in some cases with the addition of Fe. Here we investigate FeNi/CGO catalyst in relation to SOFC/SOEC fuel electrodes with focus on the Fe diffusion into Ni/CGO during catalyst reduction. The reduction process was followed by in-situ XRD and in situ TEM, and the experiments show that for low metal loadings the CGO nanoparticle size is unaffected by the presence of metals. However, for a high Fe loading the oxide particle size increases and Fe is widely spread in the catalyst, both, in the form of NiFe alloy and by converting most of the CGO to CeFeO3 and GdFeO3.",
keywords = "SOEC, SOFC, Gd-doped ceria, CeFeO3",
author = "Simonsen, {S{\o}ren Bredmose} and Muhl, {Thuy Thanh} and Thyd{\'e}n, {Karl Tor Sune} and Christodoulos Chatzichristodoulou and Jimmi Nielsen and Sudireddy, {Bhaskar Reddy}",
year = "2019",
doi = "10.1016/j.ssi.2019.115019",
language = "English",
volume = "340",
journal = "Solid State Ionics",
issn = "0167-2738",
publisher = "Elsevier",

}

Effect of Fe on high performing nanostructured Ni/Gd-doped ceria electrocatalysts. / Simonsen, Søren Bredmose; Muhl, Thuy Thanh; Thydén, Karl Tor Sune; Chatzichristodoulou, Christodoulos; Nielsen, Jimmi; Sudireddy, Bhaskar Reddy.

In: Solid State Ionics, Vol. 340, 115019, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Effect of Fe on high performing nanostructured Ni/Gd-doped ceria electrocatalysts

AU - Simonsen, Søren Bredmose

AU - Muhl, Thuy Thanh

AU - Thydén, Karl Tor Sune

AU - Chatzichristodoulou, Christodoulos

AU - Nielsen, Jimmi

AU - Sudireddy, Bhaskar Reddy

PY - 2019

Y1 - 2019

N2 - Metal supported solid oxide fuel and electrolysis cells (SOFC/SOEC) impregnated with nanosized catalysts are attractive as highly efficient low cost cells operating at relatively low temperature. Recent studies have focused on catalysts based on Ni and gadolinia-doped ceria (CGO) at the fuel side of the cell, and in some cases with the addition of Fe. Here we investigate FeNi/CGO catalyst in relation to SOFC/SOEC fuel electrodes with focus on the Fe diffusion into Ni/CGO during catalyst reduction. The reduction process was followed by in-situ XRD and in situ TEM, and the experiments show that for low metal loadings the CGO nanoparticle size is unaffected by the presence of metals. However, for a high Fe loading the oxide particle size increases and Fe is widely spread in the catalyst, both, in the form of NiFe alloy and by converting most of the CGO to CeFeO3 and GdFeO3.

AB - Metal supported solid oxide fuel and electrolysis cells (SOFC/SOEC) impregnated with nanosized catalysts are attractive as highly efficient low cost cells operating at relatively low temperature. Recent studies have focused on catalysts based on Ni and gadolinia-doped ceria (CGO) at the fuel side of the cell, and in some cases with the addition of Fe. Here we investigate FeNi/CGO catalyst in relation to SOFC/SOEC fuel electrodes with focus on the Fe diffusion into Ni/CGO during catalyst reduction. The reduction process was followed by in-situ XRD and in situ TEM, and the experiments show that for low metal loadings the CGO nanoparticle size is unaffected by the presence of metals. However, for a high Fe loading the oxide particle size increases and Fe is widely spread in the catalyst, both, in the form of NiFe alloy and by converting most of the CGO to CeFeO3 and GdFeO3.

KW - SOEC

KW - SOFC

KW - Gd-doped ceria

KW - CeFeO3

U2 - 10.1016/j.ssi.2019.115019

DO - 10.1016/j.ssi.2019.115019

M3 - Journal article

VL - 340

JO - Solid State Ionics

JF - Solid State Ionics

SN - 0167-2738

M1 - 115019

ER -